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Receiving the CPR number

Receiving the CPR number

Relocating to another country requires you to complete specific formalities that allow you to pay taxes and access employment benefits in your new location. In Denmark, CPR (Det Centrale Personregister) is the primary registration number. This unique identification number is essential for accessing various services, including healthcare and social security. Additionally, it is necessary for legal and administrative processes, making it a crucial aspect of settling in Denmark.

Understanding the CPR number

A unique identification number in Denmark is vital for establishing the identity of every resident in the country. This number, referred to as CPR (Det Centrale Personregister), is an indispensable component of daily life, as it is used by various public and private institutions.

This system enables efficient and secure processing of all paperwork associated with employment, tax settlements, and access to public services. Lacking a CPR number would make it significantly more challenging, if not impossible, to utilize many services in Denmark.

An indispensable element in many scenarios, the CPR number is crucial for interactions with government agencies and financial institutions such as banks. Additionally, employers utilize this number to uniquely identify their employees.

Comprising 10 digits, the CPR number includes the first six digits that correspond directly to a person's birth date—indicating the day, month, and year. The last four digits are generated randomly, ensuring that each number is unique.

The process of obtaining a CPR number

When relocating to Denmark with your family, it is essential for every family member to apply individually for a CPR number. Each person, including children, requires their own CPR number to fully engage in society and benefit from the services available.

It's important to highlight that the application process for a CPR number occurs only once in a lifetime. Once assigned, your tax identification number remains with you permanently, no matter how many times you return to Denmark. Therefore, even if you intend to stay in the country multiple times or change your residence, the CPR number will always serve to identify you.

For temporary stays in Denmark, such as during seasonal employment, a CPR number is not issued. Instead, you only need to obtain a kildeskattenummer, which is a taxpayer number that facilitates source taxation. This number is linked to the CPR of your employer in Denmark. To acquire this number, you must submit the appropriate application to the tax office responsible for your workplace.

You can obtain a tax identification number as early as one month before starting work in Denmark. If you have previously lived or worked in Denmark, your CPR number should already be assigned to you.

In order to obtain a CPR number, you must submit the necessary documents, which should be translated into English, German, Danish, Swedish, or Norwegian. The required documents include:

CPR number in Denmark Documents

A tax identification number is assigned to you when you receive a digital tax card, provided you haven't already obtained one. Once you have your tax card, you can find your number on your preliminary annual tax return. Additionally, SKAT will send your tax identification number to your employer through digital mail. This allows your employer to access your tax number, which is crucial for accurately calculating and paying advance income tax. This entire process aims to streamline tax administration and ensure that all documentation related to your employment and tax obligations complies with the law.

A CPR number is granted by SKAT within approximately 6 to 10 weeks after submitting all required documentation. Once you receive your CPR number, you automatically become a part of the Danish health insurance system, making you eligible for medical care. Soon after, you will need to select a doctor from a list provided by your municipality. Additionally, having a CPR number allows you to proceed with setting up a tax card.

As of June 1, 2017, applying online for a CPR number has been required in Copenhagen after obtaining a residence permit. Following the submission of your application, you will need to wait for a notification from the International Center for Foreigners in Copenhagen, informing you that a number has been assigned to you. This number must be collected in person. For individuals residing outside the capital, applications can be submitted to the Foreigners’ Centers in Odense, Aalborg, and Aarhus.

Different types of CPR numbers for residents, workers and students

The Danish CPR number is a single personal identification number, but the way you obtain it and the rights connected to it differ depending on whether you live, work or study in Denmark. Understanding these differences helps you choose the correct application route and avoid delays with tax registration and access to public services.

CPR number for residents (moving to Denmark)

If you move to Denmark with the intention of staying for more than 3 months (or more than 6 months if you are a Nordic citizen), you are generally considered a resident and must register your address in the Danish Civil Registration System to obtain a CPR number. This usually applies if you:

Residents receive a standard CPR number linked to a registered address (folkeregisteradresse). This gives you full access to the Danish welfare system, including:

To be registered as a resident, you must normally document legal grounds for residence (for example an EU right of residence certificate or a valid residence permit for non-EU citizens), a rental contract or other proof of housing, and be physically present in Denmark to complete the registration.

CPR number for workers

Many people first come to Denmark to work. You may qualify for a CPR number as a worker even if you are not yet sure whether you will stay long term. The rules differ slightly depending on your situation:

For workers, the CPR number is closely linked to tax registration. Your employer must report your salary to the Danish Tax Agency (Skattestyrelsen) using your CPR number, and you need it to obtain the correct tax card and avoid paying 55% withholding tax as a default. In many cases, registration as a worker and as a resident happen at the same time when you report your move to Denmark and present your employment contract.

CPR number for students

International students can usually obtain a CPR number if they are enrolled in a Danish educational institution and stay in Denmark for more than 3 months. This applies to:

As a student, your CPR number is typically linked to your Danish address and gives you access to public healthcare, a Danish bank account, MitID and other digital services. You will also be registered with the tax authorities, which is important if you take a student job or receive taxable grants.

Students from outside the EU/EEA must hold a valid residence permit for studies before they can be registered and receive a CPR number. EU/EEA students must document their right of residence as students and show proof of sufficient funds or income and comprehensive health insurance until they are covered by the Danish system.

Temporary CPR numbers and special cases

In some situations, people who do not meet the standard residence criteria may still receive a temporary or limited CPR registration. Examples include:

These registrations can give access to certain services (for example tax registration or healthcare in specific cases) but may not grant the same full rights as residents. The exact rights depend on your residence status, type of permit and international agreements.

Same CPR format, different rights and procedures

Regardless of whether you are a resident, worker or student, the CPR number has the same 10-digit format and functions as your unique personal identifier in Denmark. The differences lie in:

Choosing the correct category and preparing the right documents from the start is crucial. It affects how quickly you receive your CPR number, how soon you can access healthcare and how your tax situation is handled from your first day in Denmark.

Where and how to apply for a CPR number (online vs. in-person at Borgerservice/SIRI)

In Denmark, you do not apply for a CPR number directly to the tax office. Instead, you register your address and residence with the Danish authorities, and the CPR number is issued as part of this process. Where and how you apply depends mainly on your residence basis (work, study, EU/EEA, non‑EU) and whether you will stay for more than 3 months (6 months for Nordic citizens).

Where to apply: Borgerservice vs. SIRI

Borgerservice (Citizen Service) is the local municipal office that handles civil registration (CPR), address registration and the yellow health card. SIRI (Danish Agency for International Recruitment and Integration) handles residence permits and EU residence documentation for many foreign nationals.

In practice, the process usually looks like this:

Online vs. in‑person application

The CPR registration itself is completed in person at Borgerservice, but several steps can be started online to save time and avoid delays.

Online steps you can usually complete:

Steps that must be done in person:

There is currently no fully online process that grants a standard CPR number without at least one physical appearance at Borgerservice (except in specific tax‑only CPR situations for cross‑border workers handled by the Tax Agency).

Typical documents you need when applying

Exact requirements vary by municipality and residence basis, but you should be prepared to bring at least:

Some municipalities require that your rental contract clearly states the start date, duration and all tenants registered at the address. If the information is incomplete, Borgerservice may postpone your registration until you provide updated documentation.

How our accounting firm can help you

Choosing the correct application route and preparing the right documents at the first attempt is crucial to avoid delays in receiving your CPR number, tax card and access to Danish services. Our accounting firm assists international employees, freelancers, students and companies by:

With proper planning and the right guidance, the CPR application process becomes significantly smoother, and you reduce the risk of delays in salary payments, tax registration and access to healthcare.

Timeline: how long it usually takes to receive your CPR number and what can delay the process

The time it takes to receive a Danish CPR number depends mainly on your basis for residence (work, study, family reunification, EU/EEA vs. non‑EU) and how complete your documentation is. While processing times can vary between municipalities and seasons, there are some typical timelines and recurring reasons for delays that are worth knowing before you apply.

Typical processing times for CPR registration

In most straightforward cases, you can expect the following approximate timelines after you have submitted a complete application and attended any required in‑person appointment:

These timeframes refer to the period after you have successfully registered your address and submitted all required documents. If you still need to obtain an EU registration certificate or a residence permit from SIRI, you must add the processing time of those authorities on top of the CPR timeline.

What can delay your CPR number

Delays usually occur when the municipality or SIRI cannot immediately confirm that you meet the legal conditions for registration in the Danish Civil Registration System. The most common reasons include:

When you actually “have” your CPR number

Your CPR number is created in the system as soon as the municipality completes your registration. In many cases, you will:

It is important to distinguish between the moment your CPR number exists in the system and the arrival of your physical health card. In many situations, you can already use your CPR number for tax registration, opening a bank account or signing an employment contract before the card arrives, as long as the number has been officially issued.

How to reduce the risk of delays

To keep the timeline as short and predictable as possible, you can:

If you are moving to Denmark for work or business, we can help you plan the timing of your CPR registration together with tax registration, obtaining a tax card and other formalities, so that you can start working and receiving salary as smoothly and quickly as possible.

Common mistakes and reasons for CPR applications being rejected or delayed

Many CPR applications are delayed or rejected for avoidable reasons. Understanding the most common mistakes will help you prepare your documents correctly and receive your Danish CPR number as quickly as possible.

Missing or incorrect documentation

The most frequent cause of problems is incomplete or inconsistent documentation. The authorities must be able to clearly confirm your identity, your right to stay in Denmark and your address. Typical issues include:

If any key document is missing or unclear, the municipality (Borgerservice) or SIRI will usually put your case on hold and request additional information, which can easily add several weeks to the processing time.

Problems with address registration

To obtain a CPR number, you must register a real, usable address in Denmark where you actually live. Common address-related mistakes are:

If the authorities cannot verify your address in the Danish Civil Registration System, they may reject your registration or ask for extra proof, such as a signed housing confirmation from the landlord.

Unclear basis for residence and work

Your legal basis for staying in Denmark must be clearly documented. Delays often occur when:

In many cases, the municipality cannot finalise CPR registration until your immigration status is fully in order. This is especially relevant for non-EU citizens and for people changing their basis of stay (for example, from student to worker).

Arriving too early or applying too late

Timing also matters. Applications are often delayed because:

As a rule, you must have a documented address and a valid basis for residence from the date you register. Applying at the wrong time can force the authorities to postpone or re-assess your application.

Inconsistencies between forms and documents

Even small inconsistencies can cause the caseworker to stop and request clarification. Typical examples are:

When the information does not match, the authorities must verify what is correct, which can significantly extend the processing time.

Not attending required appointments or interviews

In many cases you must appear in person at Borgerservice or SIRI to complete your registration, show original documents and have your identity verified. Applications are often delayed when:

Until you have completed the in-person part of the process, your CPR number will usually not be issued.

Special situations: students, cross-border workers and family members

Certain groups face specific challenges that can lead to rejection or delay:

In these cases, the authorities often need extra documentation or coordination with other agencies, which naturally extends the processing time.

How to avoid delays and rejections

To minimise the risk of problems with your CPR application, it is important to:

Careful preparation significantly reduces the risk of your CPR application being rejected or put on hold, and helps you gain faster access to Danish services, tax registration and healthcare.

What you can and cannot do in Denmark before receiving your CPR number

Before you receive your Danish CPR number, you are in a transitional phase: you are legally in Denmark, but you do not yet have full access to many public and private services. Understanding what you can and cannot do in this period helps you avoid practical problems and delays with your move, work or studies.

What you can usually do before getting a CPR number

In many situations you can start settling in and even begin working before your CPR number is issued, as long as your residence and work basis is in order.

1. Enter into an employment contract
You can sign an employment contract and, in most cases, start working before your CPR number is issued, provided that:

Until your tax card is created, your employer may have to withhold tax at the standard high rate (currently 55%) to comply with Danish tax rules. This can be adjusted later once your tax card is in place.

2. Stay in temporary accommodation
You can stay in a hotel, hostel, Airbnb or other short-term accommodation without a CPR number. However, you generally cannot register this address as your official residence with the municipality, which is required to obtain a CPR number.

3. Open certain types of bank accounts (in limited cases)
Some banks may allow you to open a basic account as a non-resident customer using your passport and proof of address from your home country. This is not guaranteed and depends on the bank’s internal policies and anti–money laundering checks. In practice, most Danish banks will require a CPR number for a standard NemKonto-compatible account.

4. Use private healthcare and insurance
You can always use private healthcare providers and private health insurance without a CPR number, paying directly or via private insurance. This does not replace your right to public healthcare, which is linked to your CPR number and registration in the national register.

5. Enrol in studies (if accepted by an institution)
Universities and other educational institutions can admit you and let you start your studies based on your passport and admission documents. However, they will usually require your CPR number shortly after you arrive to complete your enrolment, exam registration and access to certain student services.

6. Apply for a CPR number and tax registration
You can of course start the formal process itself: booking appointments at Borgerservice or SIRI, gathering documentation and submitting applications. In some municipalities you can pre-complete online forms before your in-person registration.

What you generally cannot do without a CPR number

Many key elements of everyday life in Denmark are directly linked to your CPR number. Until you receive it, you will face limitations in these areas.

1. Register your address and obtain full residence rights
To be considered a resident in Denmark (typically when staying more than 3 months, or 6 months for some EU jobseekers), you must register your address with the municipality. This registration creates your CPR number if you do not have one already. Without it, you are not fully registered in the Danish Civil Registration System and may be treated as a non-resident for tax and social security purposes.

2. Access the public healthcare system with the yellow card
Public healthcare access is tied to your CPR number and your yellow health insurance card (sundhedskort). Without a CPR number you generally:

Emergency treatment is provided regardless of CPR status, but follow-up care and non-urgent services typically require registration.

3. Obtain a NemKonto and use most online public services
NemKonto (your mandatory “easy account” for public payments) and digital services such as e-Boks, skat.dk self-service and communication with authorities require a CPR number and MitID. Without these you:

4. Get MitID (digital ID)
MitID, which replaces NemID, is linked to your CPR number. Without a CPR number you cannot obtain a standard MitID profile. This limits your ability to:

5. Open a regular Danish bank account in most banks
Most Danish banks require a CPR number to open a standard current account that can be used as a NemKonto. Without it, you may only be offered limited services or be asked to wait until your CPR number is issued. This can delay salary payments and direct debits (Betalingsservice) for rent, utilities and subscriptions.

6. Obtain a Danish tax card (skattekort)
Your tax card is created based on your CPR number. Until it exists, your employer is required to withhold tax at the default rate of 55% and may not be able to apply your personal allowance (personfradrag). Once your CPR number and tax card are in place, your tax will be recalculated and any overpaid tax can be refunded, but this can affect your cash flow in the first months.

7. Receive most public benefits and allowances
Public benefits such as child benefits, housing support or unemployment benefits are linked to your CPR number, residence status and tax registration. Without a CPR number you generally cannot:

8. Register a car or obtain a Danish driving licence exchange
If you bring a car to Denmark or need to exchange a foreign driving licence for a Danish one, the process normally requires a CPR number. Without it, you may not be able to complete vehicle registration or licence exchange within the required deadlines, which can lead to additional costs or restrictions.

Practical tips while waiting for your CPR number

To reduce problems in the period before your CPR number is issued, consider the following:

Our accounting firm can help you understand the tax and registration consequences of your specific situation before and after receiving your CPR number, so that your move to Denmark is as smooth and compliant as possible.

Link between CPR number, tax registration and obtaining a tax card (skattekort)

The CPR number is the starting point for your entire tax life in Denmark. Without it, you cannot be properly registered with the Danish Tax Agency (Skattestyrelsen) and you will not receive a tax card (skattekort). This can quickly lead to incorrect taxation, delays in salary payments and problems with public authorities.

Why the CPR number is essential for tax registration

When you receive your CPR number, your basic personal data is registered in the Danish Civil Registration System. Skattestyrelsen uses this data to create your tax profile and link it to your income, deductions and information from your employer or educational institution.

Only after your CPR number is active can you:

Tax card (skattekort): what it is and why you need it

The tax card is an electronic document stored with Skattestyrelsen and made available to your employer. It tells your employer:

In Denmark, personal income is subject to an 8% labour market contribution (AM-bidrag) before income tax is calculated. After AM-bidrag, income tax is calculated using:

The top tax threshold is set at a specific annual income level in Danish kroner. Income above this threshold, after AM-bidrag, is taxed with the additional 15% top tax. Your tax card reflects whether your expected income will exceed this threshold and adjusts your withholding accordingly.

Personal allowance and how it appears on your tax card

All tax residents in Denmark have a personal tax-free allowance (personfradrag). This allowance is:

If you are married, unused personal allowance can be transferred between spouses under certain conditions. Your tax card automatically takes this into account when Skattestyrelsen has the correct information about your marital status and your spouse’s CPR number.

What happens if you work without a tax card

If you start working before your CPR number is registered and before your tax card is issued, your employer is legally required to withhold tax at a high standard rate. In practice this means:

This does not mean you permanently lose this money, but it can seriously reduce your net salary until your tax card is in place. Once you receive your CPR number and tax card, and your income is correctly registered, you can usually get a refund of overpaid tax through your annual tax assessment (årsopgørelse) or by updating your preliminary assessment.

Step-by-step: from CPR number to tax card

  1. Obtain your CPR number
    Register your address and status in Denmark (worker, student, accompanying family member, etc.) with the relevant authority. Once approved, you receive your CPR number.
  2. Tax registration with Skattestyrelsen
    After your CPR number is created, Skattestyrelsen either receives information automatically (for many employees) or you must contact them to register. You typically need to provide:
    • your CPR number
    • employment contract or documentation of expected income
    • information about other income (e.g. foreign income, pensions, rental income)
    • information about expected deductions (e.g. commuting, interest expenses, union fees, unemployment insurance)
  3. Preliminary income assessment (forskudsopgørelse)
    Based on your information, Skattestyrelsen prepares your preliminary assessment. This document shows your expected annual income, deductions and the resulting tax. It forms the basis for your tax card.
  4. Issuance of your tax card (skattekort)
    Your tax card is generated electronically and made available to your employer. You do not receive a physical card. Your employer then automatically withholds tax according to the information on your card.
  5. Ongoing updates
    If your situation changes during the year (salary increase, new job, unemployment, moving municipality, change in interest expenses or commuting distance), you should update your preliminary assessment. This automatically updates your tax card and helps avoid large underpayments or overpayments of tax.

Main and secondary tax cards when you have more than one job

If you have more than one employer, it is crucial to use your tax cards correctly:

If two employers accidentally use your main tax card, you may pay too little tax during the year and risk a significant underpayment when your annual tax assessment is issued. Correct allocation of hovedkort and bikort is therefore essential.

Interaction between CPR, tax registration and other systems

Your CPR number connects your tax data with other Danish systems, including:

Because everything is linked to your CPR number, it is important that your address, marital status and employment information are kept up to date. Incorrect or outdated information can lead to wrong tax withholding, delayed letters from Skattestyrelsen or problems with refunds.

How our accounting firm can help

We assist international employees, students and companies employing foreign staff with the entire process from CPR registration to obtaining the correct tax card. In practice, this can include:

By ensuring that your CPR number, tax registration and tax card are correctly aligned from the beginning, you reduce the risk of unexpected tax bills and make your financial life in Denmark more predictable and transparent.

CPR number and access to Danish healthcare and health insurance (yellow card)

The Danish CPR number is the key to accessing public healthcare and health insurance. Without a CPR number, you cannot obtain the yellow health insurance card (sygesikringsbevis), which is your proof of entitlement to treatment in the Danish public healthcare system.

How the CPR number links to the yellow health card

Once you are registered in the Danish Civil Registration System and receive your CPR number, you are assigned to a municipality and a public health insurance group. In most cases, new residents are placed in Group 1, which gives you access to a chosen general practitioner (GP) and most treatments within the public system with no direct payment at the point of use.

After registration, the municipality orders your yellow health card automatically. The card is sent by post to your registered address, usually within 2–3 weeks after your CPR registration is completed. The card shows your CPR number, name, address, municipality and the details of your GP. You must bring it when visiting your doctor, hospital or other public healthcare providers.

Who is entitled to Danish public health insurance

In general, you can obtain a yellow card if you:

Short-term stays, tourists and many cross-border commuters are not entitled to a yellow card and must rely on private insurance or the European Health Insurance Card (EHIC) from their home country.

What healthcare you can access with the yellow card

With a CPR number and yellow card, you are entitled to medically necessary treatment in the public system on the same terms as Danish citizens. This typically includes:

Some services involve co-payments, for example dental care for adults, physiotherapy (unless fully covered by a referral and specific conditions), and part of the cost of prescription medicines. Children under 18 have broader free coverage for dental care and certain treatments.

Healthcare access before you receive your CPR number

Before your CPR registration is completed, your access to healthcare is limited. In most cases you must rely on:

You are always entitled to emergency treatment in life-threatening situations, but without a CPR number and yellow card you may be billed for non-urgent care or follow-up treatment. This is why it is important to register for a CPR number as soon as you meet the conditions for residence in Denmark.

Students, posted workers and special situations

International students, posted workers and researchers often have specific rules:

Because the rules depend on your exact status, employment contract and social security coverage, it is important to clarify your situation before assuming you are fully covered by Danish public health insurance.

Keeping your CPR and healthcare data up to date

Your entitlement to healthcare is linked to your CPR data. When you move to a new address, change municipality or change your GP, you must update your information in the CPR system. In many cases this can be done online using MitID. If you fail to update your address or residence status, your yellow card may become invalid, and you may experience problems accessing services or receiving important letters from the authorities and healthcare providers.

As an accounting and advisory firm, we can help you understand how your CPR registration, residence status and employment in Denmark affect your access to public healthcare and health insurance. We coordinate with the relevant authorities so that your CPR data, tax registration and social security status are aligned, reducing the risk of gaps in your healthcare coverage.

Updating your CPR data when you move, change job or family situation

In Denmark, your CPR number is more than just an ID – it is the key to your tax, healthcare and social security records. When your life situation changes, it is your legal responsibility to keep your CPR data up to date. Failing to do so can lead to incorrect taxation, loss of rights to public services or delays in receiving important letters from the authorities.

When you must update your CPR information

You are required to report changes to your CPR data to the Danish Civil Registration System (CPR-registeret) when, for example:

Changing your address in Denmark

If you move within Denmark, you must report your new address to the municipality (folkeregisteret) no later than 5 days after you move. In most municipalities this is done digitally via borger.dk using MitID. In some cases, you may be asked to appear in person at Borgerservice, for example if you are newly arrived in Denmark or cannot use digital self-service.

Once your address is updated in the CPR, it is automatically shared with other public authorities, including the Danish Tax Agency (Skattestyrelsen), the health authorities and your municipality. This ensures that your tax card, health insurance (yellow card) and official letters are sent to the correct address.

Moving abroad and deregistering from the CPR

If you leave Denmark to live abroad for more than 6 months, you normally have to deregister from the CPR as a resident. You report your move abroad to your municipality before departure or at the latest shortly after leaving. Deregistration affects your tax liability, access to Danish healthcare and some social benefits, so it is important that the date of departure is correct.

In many cases, you will still keep your CPR number itself, but your status changes from resident to non-resident. This status is important for tax purposes, especially if you still have income from Denmark after moving.

Change of job and impact on tax and CPR-related data

Changing jobs does not normally require you to change your CPR data directly, but it has a direct impact on your tax registration. When you get a new job, you must update your preliminary income assessment (forskudsopgørelse) with Skattestyrelsen so that your tax card reflects your new salary and any deductions. This is done via TastSelv on skat.dk using your CPR number and MitID.

If you do not update your tax information after a job change, you risk receiving the wrong tax card (for example, a secondary tax card or a card with 55% withholding) or paying too little tax during the year, which can lead to a significant back tax bill later.

Family changes: marriage, divorce and children

Changes in your family situation must also be registered, as they can affect your legal status, tax situation and certain benefits:

Name changes and personal details

Legal name changes are usually handled by the municipality or the church, depending on the type of change. Once approved, the new name is updated in the CPR and is then used by all public authorities, banks and many private institutions. It is important to check that your new name is correctly shown on your health card, tax documents and bank records.

How to update your CPR data in practice

Most updates are made either digitally or via your local Borgerservice:

Processing times vary depending on the type of change and the municipality, but simple address changes within Denmark are often processed quickly. More complex changes, such as residence basis or family law matters, can take longer and may involve several authorities.

Why keeping CPR data updated matters for tax and accounting

Correct CPR data is crucial for accurate taxation and for avoiding problems with the Danish Tax Agency. Your municipality of residence, marital status and whether you are resident or non-resident for CPR purposes all influence your tax liability, applicable deductions and which tax rules apply to you.

Our accounting firm assists foreign employees, self-employed persons and companies with employees in Denmark in ensuring that CPR data, tax registration and tax cards are aligned. We help you:

If you are unsure whether a change in your life situation requires an update in the CPR or affects your tax position in Denmark, it is advisable to seek professional advice before or immediately after the change takes place.

Protection of personal data: how your CPR number is used and how to keep it safe

Your Danish CPR number is a unique personal identification number that follows you throughout your life in Denmark. It is used across public authorities and many private companies, which makes it extremely important to understand how it is used and how to protect it from misuse.

How your CPR number is used in Denmark

The CPR number is issued by the Danish Civil Registration System and is used to identify you in almost all interactions with the public sector and many parts of the private sector. Typical situations where you will be asked for your CPR number include:

Public authorities and financial institutions are legally allowed to use your CPR number when it is necessary to identify you or to fulfil a legal obligation. Private companies may only use your CPR number if they have a clear legal basis, for example when reporting salary, pension contributions or certain financial transactions to the tax authorities.

Legal protection of your CPR number

The processing of your CPR number is strictly regulated under the Danish Data Protection Act and the EU General Data Protection Regulation (GDPR). In practice this means:

You have the right to know who processes your CPR number, for what purpose and on which legal basis. You can request access to your data, ask for corrections if information is incorrect and, in some cases, limit or object to certain types of processing.

When you should and should not share your CPR number

In everyday life you will often be asked for your CPR number. As a rule of thumb, you should only share it when it is clearly necessary and legitimate. It is usually appropriate to provide your CPR number to:

Be more cautious when private companies ask for your CPR number, especially if the service does not obviously require it. For example, online shops, newsletters, loyalty programmes or marketing campaigns rarely have a legal reason to collect your CPR number. If you are unsure, ask why it is needed, how it will be stored and whether there is a legal requirement to provide it.

Practical tips to keep your CPR number safe

Because your CPR number is widely used as a key identifier, it can be attractive for fraudsters. To reduce the risk of identity theft and misuse, you should:

Recognising and reacting to possible misuse

Signs that your CPR number or identity may have been misused include unexpected letters from authorities, debt collection notices, credit agreements you did not sign or changes in your tax information that you cannot explain. If you suspect misuse, you should:

In serious cases of identity theft, you may also consider contacting the Danish Data Protection Agency (Datatilsynet) to report a data protection issue, especially if a company or authority has mishandled your CPR number.

How we handle your CPR number as your accounting partner

As an accounting firm operating in Denmark, we are required to process CPR numbers in connection with tax registration, salary administration and communication with the Danish authorities on your behalf. We only collect your CPR number when it is necessary for clearly defined purposes, such as:

We apply strict internal procedures to protect your CPR number, including limited access for authorised staff only, secure IT systems and encrypted communication channels when exchanging sensitive information. If you choose to work with us, we will clearly explain how your CPR number is used, on which legal basis and how long we keep it, so that you can feel confident that your personal data is handled correctly and securely.

Consequences of not registering for a CPR number when required

In Denmark, registering for a CPR number is not just a practical step – it is a legal obligation for most people who live, work or study in the country for more than a short period. Failing to register when required can have serious consequences for your tax situation, access to public services and even your right to stay in Denmark.

Tax consequences and risk of penalties

If you work in Denmark without a CPR number and without proper tax registration, the Danish Tax Agency (Skattestyrelsen) will normally treat your income as taxable in Denmark from day one. Your employer may be forced to withhold tax at a high standard rate, and you may:

In more serious cases, systematic failure to register and report income can be treated as tax evasion, which may lead to additional fines and, for non‑EU citizens, negative consequences for future residence or work permit applications.

Problems with residence and work permits

For EU/EEA citizens, registering for a CPR number is closely linked to obtaining an EU registration certificate when staying in Denmark for more than three months. For non‑EU citizens, the CPR registration is connected to a valid residence and work permit issued by SIRI. If you do not register for a CPR number when required, you may:

Limited access to healthcare and social benefits

Without a CPR number, you are generally not covered by the Danish public health insurance scheme and cannot obtain the yellow health insurance card. This means you may:

In addition, most public benefits and services – such as child benefits, unemployment benefits, certain student grants and municipal services – require a CPR number. Not registering can therefore exclude you from support you may otherwise be entitled to.

Practical obstacles in everyday life

The CPR number is used in almost all aspects of daily life in Denmark. If you do not register, you will typically encounter problems with:

These obstacles can make it very difficult to live and work in Denmark in a normal and legally compliant way.

Issues with employers and contracts

Employers in Denmark are required to report salary information to the tax authorities and to withhold tax correctly. If you do not have a CPR number:

Data protection and identity issues

Staying in Denmark without a CPR number often leads to the use of temporary or ad‑hoc identifiers by different institutions. This can cause:

Why timely registration is essential

Registering for a CPR number as soon as you meet the conditions helps you:

If you are unsure whether you are required to register, or if you have already been in Denmark for some time without a CPR number, it is important to clarify your situation quickly and regularise your status with the relevant authorities.

Differences between CPR number and other Danish identifiers (e.g. CVR for companies, NemID/MitID)

The Danish CPR number is only one of several identifiers you will encounter when living or doing business in Denmark. Understanding how it differs from other IDs such as CVR, NemID and MitID will help you avoid mistakes when filling in forms, registering for tax or communicating with Danish authorities.

CPR number – your personal civil registration number

The CPR number (Det Centrale Personregister) is a unique personal identification number for individuals. It is used for almost all contact with Danish public authorities and many private companies.

A CPR number is:

You will typically need your CPR number when you start a job, open a bank account, register with a doctor, sign up for digital post or apply for public benefits.

CVR number – company registration number

The CVR number (Det Centrale Virksomhedsregister) is the business identification number for companies and self-employed individuals in Denmark. It is completely separate from the CPR number.

A CVR number is:

If you run a sole proprietorship, you will have both a CPR number (as a private person) and a CVR number (for your business). These two numbers serve different purposes and should not be used interchangeably on invoices, contracts or tax forms.

NemID and MitID – digital login solutions

NemID and MitID are not identification numbers in the same sense as CPR or CVR. They are digital authentication systems used to log in securely to online self-service solutions.

MitID is gradually replacing NemID and is now the standard digital ID in Denmark. You use MitID to:

MitID is linked to your CPR number, but it is not a number itself. It consists of a user ID and authentication methods (for example an app or code display). You must never write your MitID credentials on forms or send them to anyone; only your CPR number is normally requested.

How these identifiers work together

In practice, you will often use several identifiers at the same time:

Typical confusion and how to avoid mistakes

Many foreigners in Denmark confuse these identifiers, which can lead to delays in tax registration or problems with banks and authorities. Common issues include:

As a rule of thumb, use:

Our accounting firm can help you determine when to use CPR, CVR and MitID in practice, set up correct registrations with the Danish Tax Agency and ensure that both you and your company are properly identified in all official systems.

How our accounting firm can assist you with CPR-related formalities and tax registration

Applying for a CPR number and registering correctly for tax in Denmark are closely connected. If you are an employee, freelancer, business owner or student, our accounting firm can guide you through the formalities so that your CPR registration, tax card and reporting to the Danish Tax Agency (Skattestyrelsen) are done correctly from the start.

We work with both private individuals and companies that relocate staff to Denmark, and we can assist you whether you are an EU/EEA citizen or come from outside the EU.

Support with CPR-related formalities

We do not issue CPR numbers, but we help you prepare and complete the process with the relevant authorities (Borgerservice, SIRI and the Danish Tax Agency). Our assistance typically includes:

We also help you understand how your CPR number will be used in practice: in communication with the tax authorities, banks, insurance companies and public offices, and how to protect it against misuse.

Tax registration and obtaining the correct tax card

Once you have a CPR number or a temporary tax number, you must be registered correctly for tax. In Denmark, your employer withholds tax based on your tax card (skattekort), which is issued by Skattestyrelsen. We assist with:

We make sure that your tax registration matches your real situation. This reduces the risk of large underpayments or overpayments when the annual tax assessment (årsopgørelse) is issued.

Optimising your preliminary income assessment (forskudsopgørelse)

Your preliminary income assessment determines how much tax is withheld each month. It is based on your expected annual income and deductions. We help you:

By keeping your preliminary assessment up to date, you avoid unnecessary interest on underpaid tax and improve your monthly cash flow.

Assistance for employees, students and cross-border workers

Different groups face different rules and practical challenges. We offer tailored support for:

Support for companies that hire foreign employees

If your company employs foreign staff, we can act as your partner in handling CPR-related and tax formalities for your employees. Our services include:

This helps your employees settle faster and reduces the risk of payroll errors and later tax corrections.

Ongoing compliance and communication with authorities

After you receive your CPR number and tax card, your obligations do not end. We can provide ongoing support to keep you compliant:

Why work with us?

Danish CPR and tax rules are detailed and can be difficult to navigate, especially if you are new to the country or manage international staff. By working with our accounting firm, you gain:

If you are planning to move to Denmark, start working here, or employ foreign staff, you are welcome to contact us before you apply for your CPR number. Early planning makes the process smoother and helps you comply with Danish tax and registration rules from day one.

Requirements for obtaining a CPR number

Registering your residence is a crucial step that allows you to legally live and work in Denmark under the rules applicable to European Union citizens. Without completing this registration, you will not be able to fully access the rights and services available to residents.

Moreover, securing a residence registration is vital for applying for a CPR number, which is essential for various formal procedures, including opening a bank account or securing employment.

As a citizen of an EU member state, you are permitted to stay in Denmark for up to three months without needing to register your residence. If you intend to search for employment during this period, you can extend your stay to six months. To take advantage of this extension, it is necessary to submit your residency registration application before the initial three-month period expires. This application should be sent to the relevant Statsforvaltning office, which oversees the region where you live.

To obtain a CPR number, the initial action you must take is to register with the National Population Register, referred to in Denmark as Folkeregisteret. This registration is essential, as it ensures that your personal details are officially recorded in the national registration system.

Before beginning any residency paperwork in Denmark, it is essential to gather the necessary documents. Below are the key documents required to complete the registration process and obtain the required authorizations:

Danish CPR number documents for residence

To acquire a CPR number, which is essential for legal operations in Denmark, it is necessary to demonstrate that you have permanent residency in the country. The initial step involves obtaining proof of permanent residence, which can be secured by submitting an application to the local authorities in the municipality where you live.

If it becomes necessary to obtain a certificate on behalf of another individual, a written power of attorney must be presented. This document grants us the authority to act for that person, ensuring that the procedure is both correct and legal. To be recognized by the municipal authorities, the power of attorney should be formally prepared.

Upon completing this process, you will automatically be assigned a CPR number, which is essential for numerous formalities in Denmark. Besides receiving a CPR number, registering with Folkeregisteret grants you access to the Danish health insurance system. This insurance enables you to receive comprehensive medical care in Denmark, covering visits to doctors, hospital treatments, and other health services. Without registration in the National Population Register, obtaining a CPR number and accessing health insurance would not be possible.

The application process is user-friendly, as it can be completed online, enabling you to finish the paperwork quickly without needing to visit the office in person. For individuals without Internet access, municipal offices provide services to help fill out and submit the application. Additionally, many local public libraries offer access to computers and the Internet, allowing you to submit your application at these facilities. The processing fee for this application is approximately DKK 82.

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