Norway's 183-Day Tax Residency Rule

More than 183 days in any 12-month period makes you a Norwegian tax resident, and more than 270 days in any 36-month period does the same. Here is exactly how the count works.

Last verified: September 2026

In short: you become a Norwegian tax resident if you stay in Norway more than 183 days during any 12-month period, or more than 270 days during any 36-month period. Every day you are in the country counts, including days you are there only part of the day, and the days need not follow each other. The window is not the calendar year, and the reason for the stay makes no difference.

Threshold: More than 183 days
Counting window: Any rolling 12 months
A day counts if: You are present, even part of the day
Other residence test: More than 270 days in any 36 months
Tax year: Calendar year
Legal basis: Skatteloven (Tax Act) § 2-1 (2)

The rule

Norway sets two statutory day-count lines, and crossing either one makes you a tax resident. Three points decide most real cases:

The window rolls. The 183 days are measured across any 12-month period, not from 1 January to 31 December. Two stays in different calendar years can combine inside one window.
Presence counts, even part days. All whole or part calendar days in Norway are included in the calculation, so arrival and departure days both count. The days do not need to follow each other, and the reason for staying, whether work, study or holiday, makes no difference.
There is a second line at 270 days. Staying more than 270 days across any 36-month period makes you resident too, even when no single 12-month window ever passes 183. Just over 90 days a year, three years running, is enough.

How to count it

List every Norway trip with its arrival and departure dates.
Count every day you were in the country, including arrival and departure days and days you were there only briefly.
Total the days inside a single 12-month window, then slide that window across your whole travel history.
If any 12-month window passes 183 days, the first test is met. Repeat the exercise with a 36-month window against 270 days for the second.

Example. You arrive on 1 September 2025 and leave on 30 November 2025, which is 91 days. You come back on 1 March 2026 and stay on.

Neither calendar year reaches 183 days by itself. But the window from 1 September 2025 to 31 August 2026 holds both stays: 91 days from 2025 plus 92 days from 1 March to 31 May 2026 is 183 exactly, which makes 1 June 2026 day 184 and meets the test. Because the days fall in two calendar years, you are resident from 1 January 2026.

When residency starts depends on how the days fall: pass 183 inside the year you move to Norway and you are resident from your first day in the country, while days split across two years make you resident from 1 January of the second. The 270-day test always starts residency on 1 January of the year the count passes 270.

Beyond the day count

Both tests are domestic ones. If Norway and another country each treat you as resident under their own law, the tax treaty between them decides which is your country of residence, through tie-breaker rules such as permanent home and centre of vital interests, and prevents the same income being taxed twice.

Leaving has its own conditions, and they are slower than arriving: for someone resident for at least ten years, Norwegian tax residence cannot end before the close of the third income year after the year of taking up permanent residence abroad, which AtlasDays does not track. Without free movement rights the practical ceiling comes earlier too, since the Schengen 90/180 rule caps a visa-free stay far below 183 days, so reaching either Norwegian threshold takes a permit for a longer stay. Thresholds elsewhere differ in number and in counting method, and the tax residency thresholds by country overview compares them. Residence status carries consequences beyond the count, so settle it with the Tax Administration before the numbers get close.

AtlasDays tracks Norway's 183-day rule automatically

Log your trips once. Two presets cover the two tests: Norway Tax Residency: 183 Days in 12 Months counts every day you spend in Norway across the rolling 12-month window ending today, and Norway Tax Residency: 270 Days in 36 Months does the same across 36 months. Arrival and departure days are included, both run privately on your iPhone, and each warns you as you approach its line.

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FAQ

How many days can you stay in Norway without becoming a tax resident?

Up to 183 days in any 12-month period, and up to 270 days in any 36-month period. Passing either line meets the test on its own.

Do arrival and departure days count in Norway?

Yes. All whole or part calendar days in Norway go into the count, so both ends of a trip count, and the days do not have to be consecutive.

When does Norwegian tax residency start?

Pass 183 days in the year you move and it starts on your first day in Norway. If the days are split across two years, it starts on 1 January of the second year. Under the 270-day test, it starts on 1 January of the year the count passes 270.

About this article: AtlasDays provides general information, not legal, tax, or immigration advice. Rules change and outcomes depend on your circumstances, so never rely on it alone: check the linked official source or ask a qualified professional.