Tax residency in Iceland: the 183-day rule
Medium confidenceReviewed in September 2026
The short answer
183days in rolling 12 months
- Window
- Rolling 12 months
- How it counts
- Any presence during the day
- Direction
- Reaching the threshold makes you resident
How the days are counted
More than 183 days in any twelve-month period, and here is the oddity: normal absences for holidays and the like are counted as Icelandic days rather than subtracted. The law does not say whether the days of arrival and departure count, and the tax authority and the appeals board disagree; we use the stricter reading. You are resident from the day you arrive.
The count does not decide on its own.