The 183-day rule by country: only 26 of 75 work the way you think

How many countries actually use "183 days in a calendar year"?

Just 26 of the 75 jurisdictions we track combine a 183-day threshold with a calendar-year window — the exact model most nomads plan around. The other 49 differ on the threshold, the window, or both. Breaking the 75 down:

The rule of thumb isn't useless — 183 really is the single most common threshold. It just isn't a plan. (All counts here are at the time of writing; the live figures are always on the dataset page.)

Which countries have a threshold that isn't 183 days?

Ten of the 63. Eight of them are lower than 183 — which is the direction that costs you money, because a plan built on 183 sails straight past them.

Thailand at 180 is the one that catches the most people: a "182 days, safely under 183" plan is already two days over. And these are only the day thresholds — Cyprus also offers a 60-day residency route for people with a home and business ties there.

Which countries don't reset on 1 January?

Twenty-six of the 63 — roughly four in ten — count against a rolling window rather than a calendar year. On any given day the authority looks back over the previous 12 months, so leaving in December and coming back in February resets nothing:

Argentina, Austria, Brazil, Bulgaria, Chile, Colombia, Denmark, Estonia, Finland, Georgia, Germany, Greece, Indonesia, Japan, Kazakhstan, Luxembourg, Maldives, New Zealand, North Macedonia, Norway, Portugal, Romania, Serbia, Sweden, Switzerland and Vietnam.

Portugal on that list surprises people — it is a mainstay of nomad itineraries and it does not work on a calendar year. See the rolling-window guide for how the look-back is applied.

Is the tax year the same as the calendar year?

Not everywhere, and counting against the wrong window produces confident, wrong answers. Of the 63: 30 use a calendar year, 26 a rolling window, 5 an offset fiscal year — Australia, Hong Kong, India, Mauritius and South Africa — the UK runs 6 April to 5 April, and the US stands alone with a weighted three-year lookback in which days from the two previous years still count (at ⅓ and ⅙).

Which jurisdictions have no day-count rule at all?

Twelve — because they levy no personal income tax, or tax only locally-sourced income: the UAE, Monaco, Qatar, Bahrain, Kuwait, Saudi Arabia, the Bahamas, Bermuda, the British Virgin Islands, the Cayman Islands, Brunei and Paraguay. There is no day threshold to cross because there is no worldwide income tax for it to switch on.

Worth stating plainly: this does not make your year tax-free. Your days there still count toward thresholds elsewhere, and the country you left generally keeps taxing you until you properly break residency. Separately, three taxing countries — Belgium, Mexico and the Netherlands — have no statutory day test at all; residency there turns on home and ties, so a day count can't tell you where you stand.

What does this mean if you're planning a year?

• Look up each country, don't assume 183. For roughly two in three jurisdictions the rule of thumb is wrong on the threshold, the window, or both.
• Check the window before the number. A year-to-date total is meaningless in the 26 rolling-window countries.
• Watch the low ones. Switzerland at 30 days, Cyprus's 60-day route, Thailand at 180 — all below where a 183-day plan is looking.
• Remember days aren't the only test. Home, family and economic ties make you resident in many countries regardless of days — see the 183-day myth.
• Count precisely. Arrival and departure days usually count in full. Use the 183-day calculator, or track every country at once.

Methodology and how to use this data

Each of the 75 rows is compiled from the jurisdiction's own tax authority or statute — HMRC, the IRS, Agencia Tributaria, Belastingdienst and so on — and carries the authority name, a link to the primary guidance, and the date a human last checked it. Every figure in this article was computed directly from that dataset rather than written by hand. How we source and review it is documented on our methodology page.

The full dataset is free to browse and download as CSV or JSON from the tax-residency data page. Journalists, researchers and other builders are welcome to use it — please cite Yuravia and link back to the dataset page so readers can check the sources and see the current figures. If you spot a rule that has changed, tell us and we'll re-check it against the official source.

This is reference information, not tax advice. Thresholds and tests change, and the day count is only ever part of the picture — confirm against the official source we link, or a qualified adviser, before making decisions.

Frequently asked questions