Norway — Tax Residency (183-Day and 270-Day Rules)

Summary

Rule A

More than 183 days in any 12-month period

Rule B

More than 270 days in any 36-month period

Logic

Either one alone makes you resident (OR)

Windows

Rolling — any 12 or 36 months, not calendar years

Basis

Skatteloven § 2-1(2) · Skatteetaten

Norway has two day-count tests for tax residency, and they run in parallel. Under skatteloven § 2-1(2), you become tax resident (skattemessig bosatt) if you stay in Norway either more than 183 days in any twelve-month period, or more than 270 days in any thirty-six-month period. Breaching either threshold on its own is enough — you do not need to cross both. Both limits are strictly "more than", so 184 days triggers the first rule and 271 days the second; 183 and 270 exactly are still safe. Both windows are rolling, measured over any 12 or 36 months rather than the calendar year.

Who it applies to

These two tests matter most if you are:

• Moving to Norway for work, study, or family and spending long stretches there.
• A remote worker, contractor, or frequent business traveller whose days in Norway add up over a year.
• A part-year resident who splits life across borders — where the 36-month rule can catch a pattern of repeated stays that each stay under 183 days on their own.

The tests are about physical presence, not nationality: they apply to anyone spending time in Norway. Becoming skattemessig bosatt generally means Norway can tax your worldwide income, so knowing where you stand against both thresholds is what keeps you in control.

The rule — and why it exists

Skatteloven § 2-1(2) sets out two independent day-count paths into residency, joined by "or" (eller) — so satisfying just one makes you resident:

• The 183-day rule. Staying in Norway, in one or more periods, for more than 183 days during any twelve-month period (enhver tolvmånedersperiode) makes you resident. The trigger day is day 184.
• The 270-day rule. Staying in Norway, in one or more periods, for more than 270 days during any thirty-six-month period (enhver trettiseksmånedersperiode) also makes you resident, independently. The trigger day is day 271.

Either alone is enough. The 270-day rule exists precisely so that someone who never quite reaches 184 days in a single year — but keeps returning — is still caught once their presence adds up to more than 270 days across three years (an average of about 90 days a year).

Why it exists: Norway, like most countries, uses sustained physical presence as a proxy for where your economic life really sits. Two windows of different length close two different gaps — one long stay, and a drip of shorter stays that never trip the annual limit but plainly amount to living in Norway.

Counting the days

Norway's counting convention is one of the most inclusive anywhere. Per Skatteetaten, "all whole or part calendar days in Norway are included" in the count. Practically:

1. 1Count every calendar day on which you are present in Norway — both the day you arrive and the day you leave count as full days.
2. 2Days do not need to be consecutive: presence 'in one or more periods' is added together across the window.
3. 3The reason for the stay is irrelevant — holiday, work, study, illness, and transit days all count the same.
4. 4Test the 12-month rule across any rolling twelve months, and the 36-month rule across any rolling thirty-six months — not the 1 January to 31 December calendar year.
5. 5You cross the 183-day rule on day 184 of a 12-month window, and the 270-day rule on day 271 of a 36-month window.

Because both windows roll, a stay split across a year-end does not reset. Days in late one year and early the next combine, and — for the longer rule — presence spread across three separate years accumulates toward the 270-day line.

When residency starts is set separately: from your first day in Norway if you pass 183 days within the year you move in; from 1 January of the second year if the 183 days span two income years; and from 1 January of the year in which the stay passes 270 days under the 36-month rule.

Examples

Example 1 — one long stay trips the 183-day rule

Anna moves to Oslo for a contract and stays 200 continuous days in her first year. She passes 183 within that twelve-month window, so she becomes tax resident on day 184 — resident from her first day in Norway, because the stay falls inside the move-in year.

Example 2 — the 270-day rule catches a three-year pattern

Marco visits Norway for work about 100 days in 2024, 95 days in 2025, and 90 days in 2026. No single twelve-month window ever exceeds 183 days, so the first rule never fires. But across the rolling thirty-six-month window his days total roughly 285 — more than 270 — so the second rule makes him resident on its own, from 1 January of the year he crosses 270.

Example 3 — 183 exactly, split across a year-end, stays safe

Lise spends 100 days in Norway from October to December and 83 days from January to March — 183 days across a rolling twelve-month window. Because the rule is "more than 183", exactly 183 does not trigger it, and 183 over three years is well under 270. One more day in Norway, though, would tip her over the 12-month line.

Exceptions & edge cases

• The thresholds are strict "more than". 183 days and 270 days are the last safe counts; residency triggers at 184 and 271 respectively. Off-by-one matters here — do not round.
• Residency does not lapse by leaving. These day counts only get you into residency. Once resident, simply dropping below 183 days does not end it. Norwegian tax residence ends only through a formal tax-emigration decision under a separate, more demanding test (skatteloven § 2-1(3), a multi-year regime involving very limited days and no available housing in Norway). Treat these two rules as an entry warning.
• The "90 days a year" figure is not a third rule. It is simply the 270-in-36-months rule restated as an average (270 ÷ 3), not an independent threshold.
• Svalbard. The 270-day rule does not apply to people resident on Svalbard, which has its own separate tax regime — an edge case for most travellers.
• Tax treaties can override the domestic result. If you are resident in two countries, the relevant double-tax treaty tie-breaker (permanent home → centre of vital interests → habitual abode → nationality) assigns a single treaty residence and divides taxing rights. That is where professional advice genuinely earns its keep — the day count tells you when Norway's domestic rule bites, but a treaty can reallocate the outcome.

Common misconceptions

• "It's only the 183-day rule." False — the 270-days-in-36-months rule is a fully independent second test. Either one alone makes you resident.
• "183 days makes me resident." Not quite — it takes more than 183, so 183 exactly is safe and day 184 is the trigger. Likewise 271 days, not 270, crosses the longer rule.
• "The count resets every January." No — both windows are rolling, so days on either side of 31 December combine within the same 12- or 36-month period.
• "Arrival and departure days don't count." They do — Norway counts every whole or part day of presence, both ends of a trip included.
• "If I leave, I stop being a Norwegian tax resident." No — residency you acquire this way ends only through the formal emigration test under § 2-1(3), not by staying away.

Frequently asked questions

Sources

• Skatteetaten — Tax residence when moving to or from Norway
• Lovdata — Skatteloven § 2-1 (Tax Act)