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CPR number in Denmark

When moving to another country, such as Denmark, it is important to complete certain formalities to ensure that taxes are properly settled and employment benefits are available. A key step in this process is to obtain a registration number, which in Denmark is known as a CPR (Det Centrale Personregister). This number is the primary identifier of a person in the country's administrative system.

CPR plays an important role in everyday life in Denmark. It makes it possible, among other things, to file tax returns, access public services such as health care, and receive various employee benefits. In addition, without a CPR number, it will not be possible to open a bank account, sign an apartment lease, or take many other administrative actions.

What is a Danish CPR number?

In Denmark, every resident is given a unique identification number, which is key to establishing identity. This number, called CPR (Det Centrale Personregister), consists of 10 digits, of which the first six digits directly relate to the date of birth - containing the day, month and year of birth. The other four digits, on the other hand, are randomly generated, making each CPR number unique. It is of fundamental importance in everyday life, as it is used by various public and private institutions.

The CPR number is also used by employers to accurately identify their employees. This system ensures the smooth and secure handling of all paperwork related to employment, access to public services and tax settlements. Without having a CPR number, many services in Denmark would become difficult or even unavailable to a person who does not have one.

It is worth noting that an application for a CPR number is made only once in a lifetime. Once assigned, the identification number remains assigned to you forever, no matter how often you visit Denmark. This means that even if you decide to make subsequent stays in this country or change your place of residence, your CPR number will remain the same.

Requirements for obtaining a CPR number

In order to legally live and work in Denmark, residence registration is a necessary step. European Union citizens must complete it in order to enjoy the full rights and services afforded to residents. Without this registration, access to various services and entitlements will be greatly reduced. In addition, residency registration is a prerequisite for obtaining a CPR-personnummer number, which is required for many formalities, such as opening a bank account or taking a job.

European Union citizens have the right to stay in Denmark without registration for 3 months. If you plan to look for a job and wish to extend this period to 6 months, you must apply for residence registration before the end of the initial 3-month period. The application should be submitted to the Statsforvaltning office responsible for the area where you live.

Preparing the appropriate documents is crucial before starting to deal with the formalities of residency in Denmark. Without these documents, the process of registering and acquiring the necessary authorizations will not be possible. The most important documents that will be necessary to register and obtain the required authorizations include:
- Proof of residence in Denmark - You will need to provide a document that proves your residence in Denmark.
- Passport or identity card - The identity document must be valid for the entire duration of your intended stay.
- Residence permit - Issued by the relevant immigration authorities, this can vary depending on the type of stay, such as tourist, work or study.

If the stay in Denmark is temporary, such as for seasonal work, a CPR number is not granted. Then you only need to obtain a kildeskattenummer, which is a taxpayer number that pays tax at source. This number is linked to the CPR number of the employer where you are employed. In order to obtain a kildeskattenummer, a corresponding application must be filed with the tax office responsible for our place of work.

Planning to come to Denmark with your family requires individual applications for a CPR number for each family member. Regardless of age, including children, each person must be assigned their own CPR number in order to take full advantage of the available services Denmark has to offer.

To obtain a CPR number, a necessary step is to register with the National Population Register, which in Denmark operates under the name Folkeregisteret. Registering with the Folkeregisteret is very important, as it allows your data to be officially entered into the national registration system. Once it is completed, you will automatically receive a CPR number.

Registering with Folkeregisteret also has the advantage of simultaneously providing access to the Danish health insurance system. Through this system, it is possible to receive full medical care, including hospital treatment, visits to doctors and other health services. Without registering with the National Population Register, it would both be impossible to obtain a CPR number or access Danish health insurance.

Obtaining a CPR number, which is necessary to operate legally in Denmark, requires proof of permanent residence in Denmark. At the beginning of the process, it is necessary to obtain proof of permanent residence. This can be obtained by submitting the appropriate application to the local municipality where you live.

Differences between CPR number and tax number (SKAT/TIN) in Denmark

The Danish CPR number and the Danish tax number (SKAT/TIN) are often confused, especially by foreigners moving to Denmark for work or study. In practice they serve different purposes, are issued by different authorities and are used in different contexts. Understanding the distinction is crucial for correct registration, tax compliance and communication with Danish authorities.

What is a CPR number and what is it used for?

The CPR number (Det Centrale Personregister) is your Danish civil registration number. It is a unique personal identifier used across almost all public and many private systems in Denmark. You normally receive a CPR number when you register your address with the Danish National Register after moving to Denmark for at least 3 months (or 6 months for some short‑term stays).

The CPR number is primarily used for:

In short, the CPR number is your general identity number in Denmark and is not limited to tax purposes.

What is a Danish tax number (SKAT/TIN)?

The Danish tax number is a number used by the Danish Tax Agency (Skattestyrelsen) to identify you for tax purposes. In Denmark, the tax identification number (TIN) for individuals is usually the same as the CPR number. However, there are important differences in how the numbers are issued and used, especially for people who do not qualify for a CPR number.

Key points about the Danish tax number:

When CPR and tax number are the same – and when they are not

For most residents in Denmark, the CPR number and the tax number are identical. Once you are registered in the Central Person Register, Skattestyrelsen uses your CPR number as your TIN. You will then use the same number for all public authorities, banks, employers and healthcare.

However, there are situations where you may have a tax number without having a permanent CPR number:

In these cases, Skattestyrelsen can assign a special tax number solely for tax purposes. This number allows the employer or payer to report income and withhold tax, but it does not give access to the rights and services linked to a CPR number, such as public healthcare or a Danish GP.

Legal and practical differences between CPR and tax number

The CPR number is regulated by the Danish Civil Registration Act and managed by the Danish Agency for Digital Government and local municipalities. It confirms your registration as a resident and is linked to your address, family status and access to welfare services.

The tax number is regulated by Danish tax legislation and managed by Skattestyrelsen. It is used exclusively for tax administration, including:

Having a tax number does not in itself prove legal residence in Denmark and does not automatically entitle you to social benefits, healthcare coverage or a Danish address registration. Those rights are linked to your CPR registration and residence status, not to your tax number.

CPR number and tax obligations in Denmark

Once you have a CPR number and start working in Denmark, Skattestyrelsen uses your CPR as your TIN to create your tax card. Your employer then withholds tax and labour market contributions based on the tax card linked to your CPR number. If you have multiple employers, they all use the same number.

If you are a non‑resident taxpayer with only a tax number, you are still subject to Danish tax rules on your Danish‑source income. You may be taxed under ordinary income tax rules or under special regimes for limited tax liability, depending on your situation and the applicable double taxation treaty. In all cases, the tax number is the key identifier used by Skattestyrelsen to track your income and tax payments.

Which number do you need in different situations?

In practice, you can use the following simple guideline:

How an accounting firm can help with CPR and tax number issues

Because the CPR system and the tax system are closely connected but governed by different rules, many foreigners are unsure which number they need, in which order to apply and how to stay compliant. An experienced Danish accounting firm can:

By clearly distinguishing between the CPR number and the tax number and ensuring that both are handled correctly, you reduce the risk of registration errors, incorrect tax withholding and delays in access to public services in Denmark.

CPR number structure and what the digits mean (date of birth, control digits, etc.)

The Danish CPR number (personnummer) consists of 10 digits in the format DDMMYY‑XXXX. It is a unique personal identifier used by public authorities, banks and employers. Understanding how the digits are structured helps you check whether a CPR number is plausible and avoid mistakes in payroll, reporting and contracts.

Date of birth: the first six digits (DDMMYY)

The first part of the CPR number always reflects the person’s date of birth:

For example, a CPR number starting with 120395 indicates a date of birth of 12 March 1995 or 1895. The exact century is determined by the last digit of the CPR number, according to rules set by the Danish Civil Registration System.

The last four digits: sequence and century information

The last four digits, often written after a hyphen (DDMMYY‑XXXX), are a sequence number assigned by the CPR register. They serve two main functions:

The detailed assignment rules are managed by the Danish authorities and are not something you need to calculate yourself in everyday practice. However, for compliance and bookkeeping it is important to know that the last four digits are not random and are always issued centrally by the CPR office.

Gender indication in the CPR number

The last digit of the CPR number indicates the gender registered in the Danish Civil Registration System at the time of issuance:

This can be relevant for employers and accountants when checking that personal data in HR and payroll systems match official records. Changes of legal gender are handled by the authorities and may involve a change of CPR number; companies should always update their records based on official documentation from the employee.

Control rules and validity of a CPR number

Historically, CPR numbers were validated using a mathematical control digit (a modulus‑11 check). Due to the increasing number of people and the need for more combinations, this strict control rule is no longer applied to all newly issued CPR numbers. This means:

For businesses, this has two practical consequences:

Temporary CPR numbers and special formats

In some situations, people may receive a temporary CPR number or a special identification number, for example when they are not yet fully registered in Denmark. These numbers can differ in structure or allocation logic but are still 10 digits and are used for tax, salary and reporting until a permanent CPR number is issued.

From an accounting and payroll perspective, it is important to:

Why understanding the CPR structure matters for businesses

Knowing the basic structure of the CPR number helps companies and foreign employees avoid common errors, such as entering the wrong date of birth, mixing digits or using invalid formats in payroll and tax systems. For employers, especially those hiring international staff, correct CPR data is crucial for:

A professional accounting firm in Denmark can help verify CPR data in your internal systems, align it with tax and payroll requirements, and reduce the risk of reporting errors or delays in employee registrations.

Who needs a CPR number in Denmark (employees, students, EU/EEA citizens, non‑EU citizens, cross‑border workers)

A Danish CPR number (civil registration number) is the key personal identifier used by public authorities, banks and many private companies. In practice, anyone who lives, works or studies in Denmark for more than a short, clearly temporary period will either need a CPR number or benefit significantly from having one.

Employees and people working in Denmark

If you work in Denmark and are tax resident or have a stable work pattern here, you will usually need a CPR number. This applies to:

The CPR number is required to:

Short‑term assignments may be handled with a temporary tax number in some cases, but as soon as you are considered resident or your stay exceeds the usual short‑term thresholds, a CPR number becomes necessary.

Students in Denmark

Most international students who stay in Denmark for more than a few months need a CPR number. This includes:

With a CPR number, students can register with a Danish GP (family doctor), access public healthcare, open a bank account, sign a rental contract more easily and use digital public services such as MitID and e‑Boks. Students from EU/EEA countries and non‑EU countries follow different residence permit procedures, but the CPR registration is a key step for both groups once they have the right to stay.

EU/EEA and Nordic citizens

Citizens of EU/EEA countries and Nordic countries who move to Denmark generally need a CPR number if they:

Before obtaining a CPR number, EU/EEA citizens normally register their right of residence (for example as workers, students or self‑employed persons). Nordic citizens have simplified rules but still need to register their address and obtain a CPR number when they settle in Denmark.

Non‑EU citizens

Non‑EU citizens usually need a valid residence and work permit before they can be registered in the Danish Civil Registration System and receive a CPR number. This group includes:

Once the residence permit is granted and the person has a registered address in Denmark, a CPR number is issued. Without a CPR number, non‑EU residents will face significant limitations in accessing healthcare, banking, housing and many everyday services.

Cross‑border workers and commuters

Cross‑border workers are people who live in another country but work regularly in Denmark. Whether they need a CPR number depends on the specific work pattern and tax status:

In practice, if you are employed by a Danish company or have a stable work presence in Denmark, you will often be registered with a CPR number even if your home address is in another country.

Family members and dependants

Spouses, registered partners, cohabiting partners and children who move to Denmark with a person who has the right to reside and work here will usually also need a CPR number if they live in Denmark. This allows them to:

People staying in Denmark short‑term

Tourists and very short‑term visitors do not need a CPR number. For business trips, conferences or temporary work stays of limited duration, it may be possible to handle tax and other obligations without full CPR registration, for example via a temporary tax number. However, as soon as the stay becomes longer or more permanent, authorities will normally require CPR registration.

In summary, anyone who is genuinely living, working or studying in Denmark beyond a short visit will either be required to have, or strongly benefit from having, a CPR number. It is the foundation for correct taxation, access to public services and smooth everyday life in Denmark.

CPR number for children and newborns in Denmark

In Denmark, every child who is registered as a resident is assigned a CPR number (civil registration number). This applies to newborns, children who move to Denmark with their parents, and in many cases also to children staying in Denmark for a longer period for study or family reasons. Having a CPR number is essential for access to healthcare, vaccinations, public schools, childcare and most public digital services.

CPR number for newborns born in Denmark

When a child is born in Denmark and at least one parent is legally registered in the Danish Civil Registration System (Folkeregisteret), the CPR number is created automatically after the birth is registered. In practice, this means:

Parents do not need to apply separately for a CPR number for a newborn if the birth took place in Denmark and the parents are already registered residents. However, they must ensure that the child’s name is reported within the deadline set by the authorities, usually through the parish (church office) or online self-service, so that the CPR record contains correct personal data.

CPR number for children moving to Denmark

Children who move to Denmark from abroad generally obtain a CPR number in connection with their registration as residents. The key condition is that the child will live in Denmark for more than 3 months (for EU/EEA citizens) or more than 3 months with a valid residence permit (for non-EU citizens). In practice, the process is usually combined with the parents’ registration.

To register a child and obtain a CPR number, parents are typically required to present:

Registration is carried out at the local citizen service centre (Borgerservice) in the municipality where the family lives. Once the registration is approved, the child receives a CPR number and is entered into the Danish Civil Registration System.

Temporary CPR number for children

In some situations, a child may receive a temporary CPR number (often called a substitute number) before a permanent CPR number is issued. This can occur, for example, if the child needs urgent medical treatment but the formal registration as a resident has not yet been completed. A temporary number allows access to healthcare and administrative processing, but it is not intended as a long-term solution.

Once the child is formally registered as a resident and all documentation is in order, the temporary number is replaced by a permanent CPR number. It is important to inform relevant institutions (such as the doctor, municipality, or school) about the new number so that records are updated correctly.

What the CPR number means for children

A child’s CPR number is used in almost all interactions with public authorities and many private institutions. With a CPR number, a child can:

For older children and teenagers, the CPR number is also needed later for student cards, youth education, bank accounts and part-time jobs.

Children of cross-border workers and short-term stays

Children of cross-border workers or families staying in Denmark for a limited period may or may not receive a CPR number, depending on the length and nature of the stay. If the child is not considered resident under Danish rules, they may instead receive a temporary identification number for specific purposes, for example for healthcare in connection with EU coordination rules or bilateral agreements.

In more complex situations, such as when only one parent works in Denmark and the family lives in another country, it is important to clarify in advance whether the child can or should be registered with a Danish CPR number, and how this affects access to healthcare, schooling and family benefits.

Data protection and use of children’s CPR numbers

A CPR number is sensitive personal data, and this applies equally to children. Parents should protect their child’s CPR number and only provide it when it is clearly necessary, for example to public authorities, healthcare providers, schools, banks or recognised institutions. Under GDPR and Danish data protection rules, organisations must handle children’s CPR numbers securely and only for legitimate purposes.

Parents should be cautious about sharing their child’s CPR number by email or over the phone unless they are certain of the recipient’s identity and the necessity of the request. If there is suspicion that a child’s CPR number has been misused, the parents should contact the relevant authorities, such as the municipality, the police or the Danish Data Protection Agency, and monitor any unusual correspondence or registrations.

How an accounting and advisory firm can help parents

For international families, the rules around CPR numbers for children can be closely linked to tax residence, social security coordination and entitlement to Danish family benefits. An accounting firm with experience in Danish regulations can:

Professional support helps ensure that children are correctly registered from the start, that parents meet all formal obligations, and that the family can fully access the rights and services linked to the CPR system in Denmark.

Temporary CPR number vs. permanent CPR number

A Danish CPR number can be either temporary or permanent. Understanding the difference is important, because it affects your access to public services, tax registration, banking and employment in Denmark.

What is a temporary CPR number?

A temporary CPR number is usually issued when you need to be registered in Danish systems for a limited period or when the authorities cannot yet issue a permanent CPR number. It is often used for:

In practice, a temporary CPR number allows the tax authorities and sometimes other institutions to identify you, but it does not always give you full access to all rights linked to permanent residence.

What is a permanent CPR number?

A permanent CPR number is issued when you are registered as a resident in the Danish Civil Registration System (Folkeregisteret). You normally receive a permanent CPR number if you:

A permanent CPR number is lifelong. It is not cancelled when you leave Denmark; it is only marked as inactive in the system and can be reactivated if you return and register again.

Main differences between temporary and permanent CPR numbers

Both types of numbers look similar and are used to identify you, but they differ in rights and practical use:

When a temporary CPR number is converted to a permanent one

In many cases, a temporary CPR number is only a first step. If your stay in Denmark becomes longer or your residence status changes, you may be able to obtain a permanent CPR number. This typically happens when you:

Once you are registered as a resident, the authorities will issue a permanent CPR number. In some situations, your temporary number is replaced; in others, the same number is confirmed as permanent in the system. Your employer and bank should be informed about the change so they can update their records.

Practical implications for employees and students

For foreign employees and students, the type of CPR number has direct consequences:

How an accounting firm can help with temporary vs. permanent CPR

Choosing the right registration from the beginning can save time and avoid tax or compliance issues. An accounting firm can assist by:

For anyone planning to live or work in Denmark, understanding the difference between a temporary and a permanent CPR number is essential for smooth access to public services, correct taxation and compliance with Danish regulations.

Where and how the CPR number is used in everyday life (bank, doctor, NemID/MitID, e-Boks, employer)

The Danish CPR number is the key to almost every formal interaction in Denmark. It is used to identify you in public registers, when dealing with authorities and in many private-sector services. Without a CPR number, it is very difficult to open a bank account, access healthcare, receive salary or use most digital self-service solutions.

CPR number and Danish banks

Most Danish banks require a valid CPR number to open a standard personal bank account. The CPR number is used to:

In some cases, banks may open a limited account for new arrivals who are still waiting for their CPR number, but this is not guaranteed and usually involves stricter documentation and restrictions. For normal day-to-day banking, a CPR number is considered standard and expected.

CPR number and doctors, hospitals and healthcare

Access to the public healthcare system in Denmark is closely linked to your CPR number. Once you are registered in the Civil Registration System, you are assigned a general practitioner (GP) and receive a yellow health insurance card (sundhedskort) with your CPR number printed on it. You use this card when:

Healthcare providers use your CPR number to access your medical records, register visits and ensure that services are correctly covered under the public health insurance scheme. Without a CPR number, you normally do not receive a Danish health card and may have to pay for treatment or rely on private insurance, depending on your residence status and EU/EEA coverage.

CPR number and NemID/MitID

Digital identification in Denmark is based on MitID, which has replaced NemID as the main solution. To obtain MitID in the standard way, you generally need a CPR number. The CPR number is used to:

With MitID connected to your CPR number, you can access self-service portals such as skat.dk (tax), borger.dk (citizen services) and sundhed.dk (healthcare). There are special procedures for people without a CPR number, but they are more limited and not suitable for long-term residence or employment.

CPR number and e-Boks / Digital Post

Most residents in Denmark are required to receive official mail from public authorities digitally. This is done through Digital Post, which is usually accessed via e-Boks or similar platforms. Your CPR number is used to:

Important documents such as tax assessments, letters from the municipality, hospital appointments and pension information are sent to your Digital Post linked to your CPR number. Without a CPR number, you cannot use Digital Post in the normal way and may miss legally important information.

CPR number and employers

For employment in Denmark, a CPR number is usually essential. Employers use your CPR number to:

If you work without a CPR number, your employer may be forced to withhold tax at a higher rate or may not be able to report your income correctly. This can lead to problems with tax assessments, social security rights and access to benefits. For most regular employment, especially long-term or full-time work, obtaining a CPR number is one of the first formalities that must be completed.

Other everyday uses of the CPR number

Beyond banks, healthcare, digital ID and employment, your CPR number is used in many other everyday situations, for example when you:

Because the CPR number is so widely used, it is important to protect it and share it only with trusted parties who have a legitimate reason to request it. At the same time, having a CPR number greatly simplifies daily life in Denmark and is a practical necessity for anyone living or working in the country for more than a short period.

CPR number and access to Danish healthcare and social benefits

The Danish CPR number is the key to accessing public healthcare and most social benefits in Denmark. Without a CPR number, you are usually treated as a visitor, which significantly limits your rights and options in the Danish welfare system.

CPR number and access to public healthcare

Once you receive a CPR number and register your address in Denmark, you are normally covered by the Danish public healthcare system. This gives you access to:

After registration, you receive a yellow health insurance card (“sundhedskort”) linked to your CPR number. You must show this card whenever you visit a doctor, hospital or pharmacy. The CPR number on the card is used to identify you, register treatments and settle payments between healthcare providers and the public system.

Employees and most residents who are fully tax liable in Denmark are covered without paying a separate health insurance premium. Healthcare is financed through general taxation, including income tax and labour market contributions. If you work in Denmark but live in another EU/EEA country or Switzerland, your right to Danish healthcare depends on your specific cross‑border situation and coordination rules between countries; in many cases, your CPR number is still required to register you correctly.

Who can access healthcare with a CPR number?

In practice, the CPR number is required for almost all long‑term residents who want to use the Danish healthcare system. This includes:

Short‑term stays, such as tourists or business trips, are usually covered by travel insurance or the European Health Insurance Card (EHIC) from the home country, not by the Danish CPR‑based system.

CPR number and social benefits

The CPR number is also central for identifying you in the Danish social security and tax systems. It is used by public authorities to calculate, grant and pay various benefits. Without a CPR number, you generally cannot receive Danish social benefits, even if you work in Denmark.

Key benefits and schemes that rely on a valid CPR number include, among others:

Residence, tax liability and waiting periods

Having a CPR number does not automatically guarantee full access to all Danish social benefits. Your rights depend on:

Many benefits require a certain minimum period of work or residence in Denmark. For example, unemployment benefits depend on your membership and contributions to an A‑kasse, and some family or social benefits can be reduced if you have not lived in Denmark for a sufficient number of years. The CPR number is the technical tool that allows authorities to check these conditions.

CPR number, MitID and communication with authorities

To manage your healthcare and social benefits online, you usually need both a CPR number and a digital ID (MitID). With these, you can:

All these systems are built around your CPR number as the primary identifier. If your CPR data (such as address or marital status) is not up to date, it can directly affect your benefit rights and the correctness of payments.

Consequences of not having a CPR number

If you live or work in Denmark without a CPR number, you will normally:

In such situations, you may have to rely on private insurance or coverage from your home country, which can be more expensive and administratively complex.

How an accounting firm can help

For foreign employees, self‑employed persons and companies hiring international staff, understanding the link between the CPR number, healthcare and social benefits is crucial. An experienced accounting firm can:

This helps ensure that foreign workers are correctly registered, protected by the Danish system where applicable, and that the employer complies with Danish regulations.

CPR number for foreign employees: obligations for Danish employers

When you hire foreign employees in Denmark, ensuring that each person has a valid CPR number is a core employer obligation. The CPR number is the key identifier used by the Danish Tax Agency (Skattestyrelsen), municipalities, banks and social security authorities. Without it, correct tax withholding, social contributions and access to public services are often impossible or severely limited.

Responsibility to ensure employees obtain a CPR number

Employers are not the authority that issues CPR numbers, but they are expected to guide foreign employees through the process and make sure the application is initiated in time. In practice this means:

For non‑EU/EEA citizens, you must also ensure that the employee has a valid work and residence permit before they start working. In most cases, the CPR number can only be issued after the permit has been granted and the employee has registered their address in Denmark.

Reporting to the Danish Tax Agency (eIndkomst)

All employers in Denmark must report salary and benefits to the eIndkomst system, which is linked to each employee’s CPR number. This reporting is normally done monthly and includes:

If an employee does not yet have a CPR number when they start working, you must still report their income. In such cases, a temporary identification (such as a temporary number or passport details) is used until the CPR number is issued. Once the CPR number is available, you must update your payroll system and ensure that all previous reports are correctly linked to the employee’s CPR number so that their tax account is accurate.

Correct tax withholding for foreign employees

Employers are responsible for withholding the correct Danish taxes from salary payments. This requires that the employee has both a CPR number and a tax card (skattekort). Key points include:

Failure to withhold and report correctly can lead to liability for unpaid taxes, interest and penalties for the employer.

Social security, pension and insurance obligations

The CPR number is also used to manage social security and statutory contributions. As an employer, you must:

For cross‑border workers and employees posted to Denmark, you may need to determine whether Danish or foreign social security rules apply (for example, based on A1 certificates within the EU/EEA). Correct CPR registration is often a prerequisite for handling these matters with the authorities.

Onboarding: practical use of CPR number for employees

From an HR and payroll perspective, helping foreign employees obtain and use their CPR number speeds up onboarding and reduces administrative risk. With a CPR number, employees can:

Supporting these steps is not only good practice but also helps ensure that employees’ tax and social security affairs are in order, which ultimately protects the employer.

Data protection and secure handling of CPR numbers

CPR numbers are classified as sensitive personal data under Danish law and the GDPR. Employers must handle them securely and only for legitimate purposes. This includes:

Breaches involving CPR numbers can trigger reporting obligations to the Danish Data Protection Agency and may result in fines and reputational damage.

When an employee leaves Denmark or your company

When a foreign employee stops working for you, you must:

If the employee also leaves Denmark, they are responsible for deregistering their address with the municipality and updating their tax information. However, providing clear guidance as part of your offboarding process helps avoid later questions from Skattestyrelsen and reduces the risk of disputes about tax or social contributions.

How an accounting firm can support employers

For companies that regularly hire foreign staff, working with a Danish accounting firm can significantly reduce administrative burden and compliance risk. Professional support typically includes:

By taking CPR‑related obligations seriously and setting up robust procedures, Danish employers can protect themselves from compliance issues while offering foreign employees a smooth and professional start in Denmark.

Updating your data linked to CPR (address, marital status, name changes)

Keeping your CPR data up to date is mandatory in Denmark and has a direct impact on your tax, access to healthcare, social benefits and official digital communication. Changes to your address, marital status or name must be reported to the Danish Civil Registration System (CPR) within the deadlines set by law. Below you will find an overview of when and how to update your data, and what the consequences are if you do not do it correctly.

Updating your address in Denmark

If you move to a new address in Denmark, you must report the change of address to the CPR register. This is done via the municipality (kommune) where you are moving to, usually through the national self-service portal borger.dk using MitID. If you do not have digital access, you can report the move in person at the local Citizen Service (Borgerservice).

As a rule, you must report your new address no later than a few days after moving. The municipality then updates your CPR record and automatically informs other public authorities, including the Danish Tax Agency (Skattestyrelsen). This is important because your municipality of residence affects your municipal tax rate and church tax, which together with state tax determine your total income tax burden.

If you move within Denmark and fail to register your new address on time, you risk:

When moving abroad, you must deregister from the CPR if you are leaving Denmark for more than a temporary stay. This is also done via borger.dk or at Borgerservice. Deregistration affects your tax residency, access to public healthcare and certain benefits, so it is important to coordinate this step with your overall tax and relocation planning.

Changes in marital status

Your marital status (single, married, registered partnership, divorced, widowed) is recorded in the CPR and is used by several authorities, including the tax authorities and social services. Changes must be reported and registered to ensure that your tax deductions, allowances and potential benefits are calculated correctly.

Typical situations that require an update of marital status include:

Marriages and divorces that take place in Denmark are usually reported directly to the CPR by the relevant Danish authority (for example, the municipality or the Agency of Family Law). If the event took place abroad, you may need to submit documentation such as a marriage certificate, divorce decree or death certificate to your municipality for registration. In some cases, documents must be translated and legalised or apostilled.

Your marital status can influence, among other things:

Because of these financial and legal consequences, it is important to ensure that your marital status in the CPR is always correct and updated as soon as possible after any change.

Name changes and CPR

Your official name in Denmark is the name registered in the CPR. This name appears on your health card (yellow card), tax documents, bank records and most official correspondence. If your name changes, you must apply for a name change so that the CPR can be updated.

Name changes can occur, for example, through:

In Denmark, name changes are generally handled by the Church of Denmark (for persons belonging to the church) or by the municipality for others. Applications are usually submitted digitally via borger.dk, and in many cases a fee applies for changing your name, except for certain changes related directly to marriage or divorce.

Once your name change is approved, the CPR is updated and the new name is automatically shared with other public authorities. You will typically receive a new health card showing your updated name. You should also inform your employer, bank, insurance companies and other private institutions about the change to avoid discrepancies between your CPR data and their records.

Other data linked to your CPR

In addition to address, marital status and name, the CPR contains other key information that may need updating during your stay in Denmark, such as:

Changes in these areas often require official documentation from Danish or foreign authorities. The municipality will assess which documents are necessary in each case. Accurate registration is important, as it can affect your tax situation, inheritance rights and access to certain public services.

How to check and correct your CPR data

You can view most of your registered CPR information through borger.dk or by contacting Borgerservice in your municipality. If you discover errors or outdated information, you should contact the municipality as soon as possible and provide the necessary documentation to correct the data.

Incorrect CPR data can lead to:

How an accounting firm can help with CPR-related updates

For foreign employees, self-employed persons and international families, updating CPR data can be closely connected with tax planning and compliance. An accounting firm familiar with Danish regulations can:

By ensuring that your CPR data is always correct and aligned with your tax and social security situation, you reduce the risk of unexpected tax bills, benefit repayments and administrative problems when living or working in Denmark.

What happens to your CPR number when you leave Denmark (deregistration, reactivation)

When you move away from Denmark, your CPR number does not disappear. It remains in the Danish Civil Registration System (CPR) for life, but your status and registered data change. Understanding what happens at the moment of departure and later, if you return, is important both for your tax situation and for access to public services.

Deregistration from Denmark when you move abroad

If you leave Denmark with the intention of living abroad for more than 6 months, you must deregister your address from the National Register (Folkeregisteret). This is done through your municipality of residence, usually via the online self-service solution using MitID, or by contacting the local citizen service (Borgerservice) before departure.

When you deregister:

If you move within the Nordic region, EU/EEA or Switzerland, you may in some cases keep certain rights through EU coordination rules or Nordic agreements, but you are no longer registered as living in Denmark.

Your CPR number after leaving Denmark

Your CPR number remains valid and unique even after you leave. It is not deleted or replaced, and you will use the same number if you return to Denmark later. The CPR number continues to be used for:

However, once you are deregistered as a resident, your CPR number no longer gives you automatic access to services such as the public healthcare system, municipal benefits or a Danish general practitioner (GP).

Tax residence and CPR number after emigration

Deregistration from the CPR is an important signal to the Danish Tax Agency that you have moved abroad, but it does not automatically end all tax obligations. You may still be fully or limited tax liable in Denmark depending on your situation.

Typical situations where you may still have tax obligations after leaving include:

Your CPR number is used to identify you in all these tax matters. It is therefore important that your departure is correctly registered and that you file any required tax returns for the year of departure and subsequent years, if relevant.

Access to healthcare and social benefits after departure

When you are deregistered as resident in Denmark, your right to treatment under the public healthcare system normally ends from the date of departure. Your yellow health insurance card (sundhedskort) is no longer valid, and you cannot be assigned a Danish GP.

Similarly, most social benefits linked to residence in Denmark stop when you move abroad, for example:

Your CPR number remains in the system, but it no longer gives you the same rights as a resident. If you are entitled to exportable benefits under EU or other agreements, they will still be linked to your CPR number, but paid according to the relevant rules.

Reactivation of your CPR number when you return to Denmark

If you move back to Denmark after having been deregistered, you do not receive a new CPR number. Instead, your existing number is reactivated with a new address and updated personal data.

To reactivate your CPR number, you must register your move to Denmark with the municipality where you will live. This usually requires:

Once your move is registered, your CPR number is reactivated with resident status. You can then obtain a new yellow health card, register with a GP, and regain access to NemID/MitID and other digital services, subject to the current identification requirements.

Updating your data linked to CPR after moving

When you leave Denmark, it is important to keep your CPR-linked data up to date to avoid problems with tax, pensions and communication from authorities. You should:

If your marital status or name changes while you live abroad, you may need to report this to Danish authorities, especially if the change affects tax, inheritance or family law matters. In some cases, foreign documents must be legalized or apostilled and translated before they can be registered in the CPR.

Consequences of not deregistering properly

If you move abroad without deregistering from the CPR, you may face several problems:

Proper deregistration ensures that your CPR status reflects your actual situation and reduces the risk of disputes with Danish authorities.

How an accounting firm can help when you leave or return to Denmark

An accounting firm familiar with Danish rules can assist you in planning your departure or return so that your CPR registration, tax residence and social security status are aligned. This typically includes:

By coordinating CPR matters with tax and social security rules, you reduce the risk of unexpected tax bills, loss of rights or administrative complications when changing your country of residence.

Data protection and confidentiality of the CPR number (GDPR, secure use, common scams)

The Danish CPR number is a unique personal identifier and is treated as sensitive information under Danish and EU law. Proper protection of your CPR number is crucial, because it is used to access a wide range of public and private services, including tax, banking, healthcare and digital self‑service solutions.

CPR number and GDPR in Denmark

In Denmark, the processing of CPR numbers is regulated by the EU General Data Protection Regulation (GDPR) and the Danish Data Protection Act. Under these rules, public authorities and private companies may only process CPR numbers when:

Organisations that process CPR numbers must implement appropriate technical and organisational security measures. This typically includes access control, encryption, logging of access, internal policies for handling CPR data and regular staff training. They must also inform you why they need your CPR number, how it will be used, and how long it will be stored.

How your CPR number is protected in practice

In everyday life, your CPR number is often used together with secure digital solutions. For example, when you log in to public services or banks, you normally use MitID rather than entering your CPR number as a password. The CPR number identifies you in the system, but access is controlled through strong authentication.

Public authorities and many private companies are not allowed to send your CPR number in unencrypted emails or letters where it is not necessary. In digital communication with authorities, your CPR number is usually protected through secure platforms such as e‑Boks and encrypted connections.

If an organisation suffers a data breach involving CPR numbers, it may be obliged to notify the Danish Data Protection Agency and, in some cases, inform the affected individuals. Serious violations of data protection rules can lead to significant fines and compensation claims.

How to use your CPR number securely

Although the CPR number is widely used, you should only share it when it is genuinely necessary. Typical situations where you can expect to provide your CPR number include:

Be cautious when asked for your CPR number by phone, email or social media. As a rule, you should:

Common scams involving CPR numbers

Fraudsters often try to misuse CPR numbers to commit identity theft, open bank accounts, apply for loans or access public benefits in someone else’s name. Typical scams include:

Legitimate authorities and banks in Denmark will not ask you to disclose MitID codes, full card details or passwords by phone, email or SMS. If you receive a suspicious request, contact the organisation through its official contact details and do not use the links or numbers provided in the message.

What to do if your CPR number is exposed or misused

If you suspect that your CPR number has been misused or is at risk, you should act quickly:

In some cases, authorities can register a warning or special note on your CPR record to help prevent further misuse, for example in connection with credit applications.

How an accounting firm protects your CPR number

When you work with a Danish accounting firm, your CPR number is often needed for payroll, tax registration, reporting to SKAT and other compliance tasks. A professional firm is required to handle your CPR number in line with GDPR and Danish data protection rules. This normally includes:

By choosing an accounting firm that takes data protection seriously, foreign employees, entrepreneurs and companies can ensure that their CPR numbers are used only for lawful purposes and are protected against unauthorised access and fraud.

Consequences of not having a CPR number when living or working in Denmark

Living or working in Denmark without a CPR number is technically possible for a short period, but in practice it severely limits access to essential services and can create tax, employment and legal problems. The CPR number is the key identifier used by public authorities, banks, employers and many private companies, so its absence quickly becomes a barrier in everyday life.

Limited access to work and salary payments

Most Danish employers require a CPR number to register an employee correctly with the tax authorities (Skattestyrelsen) and the income register (eIndkomst). Without a CPR number:

For cross-border workers and short-term employees, a temporary tax number can sometimes be used, but it does not replace a CPR number and does not give access to most public digital services.

Problems opening a bank account and managing finances

Most Danish banks require a CPR number to open a standard personal account (NemKonto) and to perform mandatory customer identification checks (KYC/AML rules). Without a CPR number you may:

In practice, not having a CPR number often means relying on foreign accounts and cash, which is inconvenient and sometimes not accepted by Danish employers or landlords.

No automatic access to Danish healthcare

The CPR number is directly linked to registration with the Danish National Health Service. Without it, you normally do not receive:

In urgent situations you are still entitled to emergency treatment, but you may be billed afterwards if you are not covered by Danish health insurance or an EU/EEA agreement. For longer stays, living in Denmark without a CPR number can therefore mean higher medical costs and more administrative work to prove insurance coverage.

Restricted access to housing and everyday services

Many landlords, especially professional housing companies, ask for a CPR number to draw up a lease contract and register tenants correctly. Without a CPR number you may:

The CPR number is also needed for a wide range of everyday services, such as mobile phone subscriptions, internet contracts, some insurance policies and gym memberships. Without it, you may be limited to more expensive prepaid solutions or be refused service entirely.

No access to NemID/MitID, e-Boks and digital self-service

Digital identification (MitID) and the secure digital mailbox (e‑Boks) are built around the CPR number. Without a CPR number you usually cannot:

This means that important information may not reach you, deadlines can be missed and you may have to handle most matters in person or by post, which is slower and more complicated.

Limited access to social benefits and pensions

Most Danish social benefits are linked to registration in the CPR system and to a registered address in Denmark. Without a CPR number you generally cannot:

Even if you pay tax in Denmark, missing CPR registration can make it difficult to document residence periods and entitlements later, for example when claiming pensions or cross-border benefits.

Tax complications and risk of incorrect assessments

Without a CPR number, the Danish tax authorities cannot create a standard tax file for you. This can lead to:

In cross-border situations, lack of a CPR number can also complicate the application of double taxation treaties and the documentation of your tax residency status.

Unclear legal status and problems with documentation

The CPR number is often used as proof that you are legally registered as a resident in Denmark. Without it, you may have trouble:

For EU/EEA citizens, not registering and not obtaining a CPR number within the required time can also create doubts about compliance with free movement rules and local registration obligations.

Higher risk of administrative errors and delays

When you do not have a CPR number, authorities and companies often have to use alternative identifiers, such as passport numbers or temporary tax numbers. This increases the risk of:

Correcting such errors later can be time-consuming, especially if you have already left Denmark or changed your residence status.

For anyone planning to live or work in Denmark for more than a short period, obtaining a CPR number as early as possible is crucial. It simplifies employment, taxation, access to healthcare and everyday life, and reduces the risk of legal and financial complications in the future.

Common problems when applying for a CPR number and how to solve them

Applying for a Danish CPR number is usually straightforward, but foreign residents and employees often encounter recurring issues. Understanding the most common problems in advance can save time, prevent delays and help you start working or studying in Denmark without unnecessary stress.

Missing or incorrect documentation

One of the main reasons CPR applications are rejected or delayed is incomplete documentation. The Danish authorities are strict about original documents and consistency of data.

Typical issues include:

To avoid this, carefully check the list of required documents on the website of the local International Citizen Service (ICS) or municipality before booking an appointment. Make sure your employment contract clearly states that the job is in Denmark, includes your Danish workplace address and specifies whether the position is full-time or part-time. For family members, prepare legalized or apostilled civil status documents if required.

Problems with address registration

To obtain a CPR number, you must usually register a Danish address where you will live for at least three months. Many newcomers struggle with this requirement.

Common problems include:

If you plan to live in Denmark for more than three months, secure a rental contract that allows you to register your address (folkeregisteradresse). Ask the landlord or main tenant explicitly whether address registration is permitted and ensure the address is written exactly as in the official building register. If you are unsure, the municipality can verify the address format before your appointment.

Unclear residence and work rights

Another frequent obstacle is uncertainty about the right to reside and work in Denmark, especially for non‑EU citizens and some EU/EEA family members.

Typical issues:

Before applying for a CPR number, check whether you need a residence permit or EU residence document. In most cases, you must first obtain the relevant permit from SIRI or the State Administration and only then register for a CPR number at the municipality. If your permit is still being processed, you may have to wait until the decision is issued before you can complete CPR registration.

Delays in appointments and processing time

In large cities, International Citizen Service centres and municipalities can be very busy, especially around the start of the academic year or when many new employees arrive. This often leads to long waiting times for appointments and slower processing.

To reduce delays:

In some cases, you may receive your CPR number shortly after the appointment, while your health card and other documents arrive later by post. Make sure your name is on the mailbox at your registered address so letters from the authorities are delivered correctly.

Issues for short‑term and cross‑border workers

Employees who work in Denmark but live in another country, or who stay for less than three months, often face special challenges.

Typical problems include:

If you are a cross‑border worker living in another EU/EEA country or Switzerland, you may not always receive a Danish CPR number but will still need to be registered for tax. In such cases, the employer must ensure correct registration with the Danish Tax Agency and, where relevant, help you obtain a personal tax number. Clarify with your employer and, if needed, with an accounting firm whether your situation requires a CPR number, a tax number or both.

Family members and children

When moving to Denmark with a spouse, partner or children, the CPR process can become more complex. Problems often arise when documents for family members are not prepared in advance.

Common issues:

To avoid delays, gather all family documents before moving: marriage certificates, birth certificates for children and, where relevant, custody or divorce documents. Check whether they must be legalized or apostilled and whether an official translation into English or Danish is required. Bring both original documents and copies to your appointment.

Errors in registered data

Even when the CPR number is granted, mistakes can occur in the registered data, such as misspelled names, wrong address or incorrect civil status. These errors can later cause problems with banks, employers, tax authorities and digital services like MitID and e‑Boks.

If you notice an error, contact your municipality or the relevant authority as soon as possible to correct the information. In many cases, you will need to present your passport or civil status documents again. Do not ignore discrepancies, as they can lead to issues with salary payments, tax assessments or access to healthcare.

How to solve CPR application problems efficiently

When you encounter difficulties with your CPR application, it is important to act quickly and systematically:

  1. Identify the exact reason for the problem or rejection and ask the municipality or ICS office for a written explanation if possible.
  2. Collect or update the missing documents, ensuring they are original, valid and consistent with your passport data.
  3. Check the most recent rules on the websites of the Danish Tax Agency, SIRI and your municipality, as procedures can change.
  4. Inform your employer or educational institution about the delay so they can adjust start dates, salary payments or insurance coverage if necessary.
  5. Consider using professional assistance from an accounting or relocation firm experienced with foreign residents in Denmark.

With proper preparation and the right guidance, most CPR‑related issues can be resolved quickly, allowing you to focus on your work, studies and everyday life in Denmark.

How an accounting firm can assist with CPR-related formalities for foreign clients

For many foreigners, dealing with Danish authorities, forms and online systems in a new language can be overwhelming. A specialised accounting firm can significantly simplify the process of obtaining and using a CPR number, especially when it is linked to employment, business activity or tax obligations in Denmark.

Support before applying for a CPR number

An accounting firm can first assess whether you actually qualify for a Danish CPR number and which type you need (permanent or temporary). This includes checking:

On this basis, the firm can advise you which authority you should contact (International Citizen Service, local municipality, SIRI, tax office) and in what order to complete the formalities so that your CPR registration, tax registration and social security coverage are aligned.

Preparing documentation and application

Many CPR applications are delayed because of missing or incorrect documents. An accounting firm can help you:

For companies hiring foreign employees, the firm can also prepare standard document packages and internal procedures so that each new employee can obtain a CPR number as quickly as possible.

CPR number, tax registration and e-income reporting

Once you receive a CPR number, it becomes the key identifier for your tax and social security obligations in Denmark. An accounting firm can:

This reduces the risk of incorrect withholding tax, unexpected back taxes or delays in salary payments due to missing tax cards.

Assistance with NemID/MitID, e-Boks and banking

In practice, a CPR number is necessary to access most digital services in Denmark. An accounting firm can guide you through:

With these elements in place, you can receive salary, pay bills, access tax information and communicate securely with Danish authorities.

CPR number and social security, healthcare and benefits

For many foreigners, the CPR number is also the gateway to the Danish welfare and healthcare system. An accounting firm can explain how your CPR registration affects:

In more complex cases, such as employees working in several countries or short-term assignments, the firm can coordinate with social security institutions and advise on A1 certificates and contribution obligations.

Changes to your data and life situation

During your stay in Denmark, your personal data linked to your CPR number may change. An accounting firm can help you understand when and how to report changes such as:

Correct and timely updates reduce the risk of incorrect tax calculations, loss of mail from authorities or problems with benefits and healthcare coverage.

Leaving Denmark and CPR number deregistration

When you leave Denmark, your CPR number does not disappear, but your registration status changes. An accounting firm can:

This ensures a clean closing of your Danish tax and social security affairs and reduces the risk of letters or tax assessments being issued to an outdated address.

Compliance, data protection and fraud prevention

Your CPR number is highly sensitive personal data. An experienced accounting firm will handle it in line with GDPR and Danish data protection rules. This includes:

By working with a professional firm, you reduce the risk of identity theft and ensure that your CPR number is used only where it is legally required and appropriate.

For both private individuals and companies employing foreign staff, cooperation with an accounting firm experienced in Danish CPR procedures can save time, reduce stress and minimise the risk of costly mistakes in tax, social security and registration matters.

How to obtain a CPR number?

The ability to apply online greatly simplifies the entire process, eliminating the need to visit offices in person. As a result, the paperwork can be handled quickly and conveniently. The cost of processing such an application is about DKK 82. For those without Internet access, municipal offices offer assistance in filling out and submitting documents. In addition, local public libraries often have computers and network access, which also makes it possible to apply online in case you don't have personal equipment.

To obtain a certificate on behalf of another person, it is necessary to provide a written power of attorney. This document allows us to represent the person, which is crucial to ensure the correctness and legality of the entire process. The power of attorney must be formally prepared in order to be accepted by the relevant municipal authorities.

You can obtain a tax identification number at the earliest one month before you start working in Denmark. If you have previously lived or worked in the country, it is likely that you already have a CPR number assigned to you.

To obtain a CPR number, it is necessary to provide documents that should be translated into one of the following languages: English, German, Danish, Swedish or Norwegian. Required documents include:
- Proof of employment, such as an employment contract,
- Proof of residence in Denmark, such as a rental agreement,
- Proof of identity, such as a passport or ID card,
- Certificate of residence permit,
- In case of marriage, marriage certificate (even if the spouse remained in another EU member state),
- If applicable, documents such as divorce certificate or death certificate of the spouse,
- Children's birth certificates if they moved with a parent.

Since June 1, 2017, Copenhagen has made it mandatory to apply for a residence permit via the Internet. After completing and submitting the application, it is necessary to wait for information from the International Center for Foreigners in Copenhagen, which will then provide a reference number. This number must already be collected in person. For those outside Copenhagen, it is possible to apply at the Foreigners' Centers in Odense, Aarhus and Aalborg.

A CPR number is usually granted by SKAT within 6-10 weeks after submitting complete documentation. Once we have a CPR number, we automatically gain access to the Danish health insurance system and the right to receive medical services. Shortly thereafter, our municipality will provide us with a list of doctors from which we will have to choose our doctor. In addition, once you receive your CPR number, you can begin the process of setting up a tax card.

Once your CPR number is assigned, you will find it on your initial annual tax return. Moreover, SKAT will send your tax identification number to your employer via digital mail. Such a system allows your employer to access your tax number, which is crucial for the correct calculation and transfer of advance income tax payments. The entire process has been designed to simplify tax administration and ensure that all issues related to employment in Denmark and related tax obligations are handled in accordance with current regulations.

Planning to move to Denmark? Obtaining a CPR number is a key step that will make your daily life in the country easier. We will help you through the entire process - from understanding the requirements, to registering with Folkeregisteret, to completing the necessary documents. With our help, you'll get your CPR quickly and smoothly, allowing you to use public services such as health care, as well as deal with official matters or open a bank account.

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