Denmark Tax Residency (6-month rule)

Key parameters
Threshold	6 consecutive months
Period / Window	Continuous stay, not a calendar year
Counting	Elapsed time, holiday absences ignored
Alternative	Residence test
Additional requirements	3 months or 180 days with a home

Denmark reaches full tax liability by 2 routes, and the day rule is the slower of them:

• 6-month stay — being in Denmark for at least 6 consecutive months. Short absences abroad for holidays and similar purposes do not interrupt the period, so it runs on elapsed time rather than on days present.
• Residence — acquiring or renting a home in Denmark, or being provided one by an employer, and then staying in the country for purposes beyond short holidays. Much shorter limits apply once a home exists, and any work at all can trigger liability immediately.

The residence limb is what actually catches most arrivals. Once a home is available, the question shifts from how long you stayed to why you were there. Turning up to work, even briefly, alongside an available home can create full liability long before any 6-month period has run.

The distinction matters because the 2 limbs pull in opposite directions. Someone without a Danish home can spend a substantial stretch in the country before liability attaches. Someone who rents an apartment and starts working can be liable from the outset.

A separate relief for people working abroad, known as Section 33A, is easy to confuse with this because it also turns on a day count. It doesn't decide residency at all — see Relief for work abroad below.

Section 33A — in Danish, ligningslovens § 33 A — is a relief that runs alongside the residency tests and is regularly mistaken for one, because it also turns on a day count. It doesn't decide whether you are a Danish tax resident. It assumes you already are, and reduces Danish tax on salary you earned while working abroad.

• What it means — a relief for someone who stays fully liable to Danish tax but earns their salary working outside Denmark, the Faroe Islands and Greenland. It applies to that employment income only, not to your residency status and not to other income.
• Who can apply — the stay abroad has to last at least 6 months, and you can spend at most 42 days in Denmark within any 6-month period of it. Those 42 days cover holidays, time off, and work in Denmark directly necessary to the foreign job. Broken days count as whole days. Since a 2023 change in case law the stay must also have a genuine work reason behind it, rather than being incidental to living abroad.
• What it gives — either full or half relief on the foreign salary. Which one applies turns on whether Denmark has a double taxation agreement with the country you worked in, and whether that agreement leaves Denmark a taxing right. Where you qualify under both this relief and a treaty, you can take whichever is better for you.

Exceeding the 42 days costs you the relief for the whole stay, not just the excess. It also cannot be combined with the flat-rate expatriate scheme — income taxed under that scheme is outside this relief entirely.

• A home changes the numbers entirely. With accommodation available the limits drop to around 3 consecutive months or 180 days in any 12, and any work at all triggers liability whatever the count.
• Employer-provided accommodation counts. A home you did not rent or buy yourself still satisfies the residence limb if it is made available to you.
• Holiday trips out do not restart the clock. Because short absences are disregarded, breaking up a long stay with vacations abroad does nothing to reset the 6-month period.
• A shorter presence can still be taxed, just not fully. Danish-source income remains chargeable under limited liability even where neither route to full liability is met.
• A flat-rate expatriate scheme exists for qualifying employees, applying for a limited period. Like Section 33A, it changes how income is taxed rather than whether the residency tests are met.

Full liability reaches worldwide income while limited liability covers only Danish-source income, so a misjudged position usually surfaces as foreign earnings left undeclared — most often by someone who took a Danish home and assumed a 6-month clock was still running. The Danish Tax Agency charges interest on unpaid tax accruing monthly from the original due date, and a return that understates a liability can attract a separate penalty, rising where the omission is treated as deliberate. Professional tax advice is strongly recommended in situations like this.

A stay that runs past six months

You take a 9-month project in Aarhus, staying in hotels and flying home for 2 weeks at Christmas. The holiday absence does not break the period, so you pass 6 consecutive months and become fully liable.

A flat that brings the date forward

You rent an apartment in Copenhagen in February and start work immediately. The home combined with a working purpose means full liability can attach from early on, rather than waiting for a 6-month period to complete.

A short stay with no base

You spend 4 months in Denmark on a contract, staying in serviced accommodation booked by the week and leaving for good afterwards. The stay falls short of 6 months and no home was acquired, so full liability is not triggered.

• Skattestyrelsen — Tax liability
• Skattestyrelsen — Danish Tax Agency
• Skattestyrelsen — Cross-border tax matters