Norway's 183-Day and 270-Day Rules: The Two Clocks That Make You Tax Resident (2026)

Most countries run one presence test. Norway runs two, simultaneously, and the second is the one that catches people. Per the Norwegian Tax Administration, you become tax resident if you stay in Norway more than 183 days during a twelve-month period, or more than 270 days during a thirty-six-month period (Skatteetaten, Tax when you move to Norway). Both windows are rolling, the days need not be consecutive, and whole or partial calendar days all count. Updated 11 August 2026.

Why two clocks

The 183-day rule polices the single heavy year. The 270-day rule polices the pattern: it works out to an average of 90 days a year across three years, so a repeat visitor who never goes near 183 in any year can still cross it comfortably. Ninety-five days a year, every year, means roughly 285 days in any 36-month window: resident, despite never breaching the annual rule. If that structure feels familiar, it is the same trap as the US Substantial Presence Test's weighted three-year formula: annual thinking, multi-year arithmetic.

Who this bites: the emigrated Norwegian

Norwegians who have formally emigrated for tax purposes face these rules on every visit home. Summers at the family cabin, Christmas, a sick parent: the days stack across both windows, and the 270/36 clock in particular punishes exactly the steady, moderate pattern an emigrant naturally falls into. The safe maxima are precise: 183 days in any rolling 12 months and 270 in any rolling 36, with day 184 and day 271 respectively tipping you back into residency, and with re-entry into the Norwegian tax net comes worldwide income taxation and Norway's wealth tax.

Counting properly

• Part days count. Land at Gardermoen at 23:30 and that was a Norway day. Arrival and departure days both burn budget.
• The windows roll daily. There is no calendar-year reset on either clock: every day, look back 12 months and 36 months and count.
• The clocks are independent. You must stay under both. Passing one is not a defence to the other.

Running both counters

A 36-month rolling lookback is beyond what anyone tracks reliably by hand, which is precisely the customer request that shaped our app's roadmap. The Days Monitor iPhone app logs Norway days automatically and runs rolling-window custom rules: the 183-in-12-months rule works today, and support for windows up to five years, covering the 270-in-36-months rule directly, ships in the next update. Both counters then run side by side with alerts before either line, and timestamped exports if Skatteetaten ever asks. Download it on the App Store.

Sources

• Skatteetaten, Tax when you move to Norway (accessed 11 August 2026)
• PwC Worldwide Tax Summaries, Norway (accessed 11 August 2026)
• OECD, Norway tax residency rules (accessed 11 August 2026)

This article is general information, not tax or legal advice. Norwegian residency rules interact with treaties, wealth tax and your individual facts; verify current rules with Skatteetaten and take advice from a qualified professional before relying on any threshold.