Tax residency · September 8, 2026
The 183-day rule: what it means, and what it doesn't
Staying under 183 days is the best-known residency rule and the most misunderstood. Where it applies, where it doesn't, and what else tax authorities check.
“Stay under 183 days and you won’t be a tax resident” is repeated everywhere. It’s a useful rule of thumb, and it’s often wrong.
Where the number comes from
183 days is just over half a year. Many countries treat someone present for 183 days or more in a tax year as resident, and the number also appears in tax treaties, for example in the rules about when employment income can be taxed where the work is done.
Why under 183 isn’t a guarantee
Most countries use more than one test, and meeting any one can be enough:
- Home or center of life. France treats you as resident if your home or main place of stay is there, or if France is your center of economic interest, regardless of days. Israel looks at your center of life.
- Ties. The UK’s Statutory Residence Test can make you resident with far fewer than 183 days if you have enough UK ties: family, accommodation, work or a history of UK presence.
- Shorter thresholds. Switzerland can treat a continuous 90-day stay as residence (30 days if working). Cyprus has a 60-day route. India can make you resident at 60 days in some cases.
- Different periods. Some countries count a calendar year, others a tax year that starts in April or July, others any rolling 12 months, like New Zealand.
- Multi-year formulas. The US Substantial Presence Test weights three years of days, so 122 days a year can be enough.
Leaving a country is a separate question
Not becoming resident somewhere new doesn’t mean you’ve stopped being resident where you came from. Many people need to stay under a limit in their home country, too. Diego’s Non-Residency tracker warns you from day 120 at home.
What to keep
Whatever the rule, the evidence is your record of where you were each day. A day-by-day log, with dates of entry and exit, is the first thing an adviser or tax authority will ask for.
Diego counts each rule separately, the 183-day rule country by country, twelve national tests, US states and cities, and your home country, so you can see every position at once.
This guide is general information, not tax advice. Residency rules have exceptions and change over time; check your position with a qualified professional.
Common questions
Does staying under 183 days mean I'm not a tax resident?
Not necessarily. Many countries use other tests alongside day counts, such as where your home, family or economic interests are, so you can be resident with fewer than 183 days. The UK, France and Israel are examples.
Where does the 183-day rule come from?
183 days is just over half a year. Many countries treat someone present for 183 days or more in a tax year as resident, and the number also appears in tax treaties, for example in the rules on where employment income can be taxed.
Can you become tax resident with fewer than 183 days?
Yes. Switzerland can treat a continuous 90-day stay as residence, or 30 days if you work there. Cyprus has a 60-day route, India can make you resident at 60 days in some cases, and the US Substantial Presence Test can be met with about 122 days a year.
Do all countries count 183 days in a calendar year?
No. Some use the calendar year, others a tax year that starts in April or July, and others any rolling 12-month period, as New Zealand does. Check which period applies before counting.
Does leaving a country end my tax residency there?
Not automatically. Not becoming resident somewhere new doesn't mean you've stopped being resident where you came from, and many countries keep former residents in their tax net if they keep ties or spend too many days there.
