Tax Residency 183-Day Calculator
Log where you stayed and see your days against the statutory day tests for 11 countries, counted the way each tax authority counts them.
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Add each stay with the country and the dates you arrived and left. Your stays are saved in this browser only.
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Days Monitor logs the country you are in every day and tracks your days against rules for any country, so your tax residency count is always up to date.
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Tax residency day tests by country
Days are only one part of tax residency. Most countries also look at your home, family and economic ties, and tax treaties decide between two countries that both claim you.
| Country | Day test |
|---|---|
| Australia | Being in Australia for more than half the income year (1 July to 30 June) makes you resident under the 183-day test unless the Commissioner is satisfied your usual place of abode is overseas and you don't intend to live in Australia. |
| Canada | If you are not factually resident but sojourn in Canada 183 days or more in a calendar year, you are deemed resident for the whole year. |
| Greece | You are Greek tax resident if you are in Greece for more than 183 days in total in any 12-month period, from the first day of your presence. |
| Ireland | You are Irish resident if you spend 183 days or more in Ireland in a tax year (the calendar year). |
| New Zealand | You become NZ tax resident once you've been in New Zealand more than 183 days in any 12-month period, backdated to the first of those days. |
| Portugal | You are Portuguese resident if you stay more than 183 days, consecutive or not, in any 12-month period that starts or ends in the tax year. |
| Singapore | A foreigner is a Singapore tax resident for a year if they are physically present or employed in Singapore for 183 days or more in that calendar year. |
| Spain | You are Spanish resident if you stay in Spain more than 183 days in the calendar year (sporadic absences count toward the total). |
| Thailand | You are a Thai tax resident if your stays in Thailand total 180 days or more in a calendar year. |
| United Kingdom | Spending 183 or more days in the UK in a tax year (6 April to 5 April) automatically makes you UK resident under the Statutory Residence Test. |
| United States | Substantial presence test: resident if present at least 31 days this year AND current-year days + 1/3 of prior-year days + 1/6 of the year-before days total 183 or more. |
Common Questions
Frequently Asked Questions
What is the 183-day rule for tax residency?
Many countries treat you as tax resident if you spend 183 days or more (or, in some countries, more than 183 days) there in a year. The details differ: the UK counts days in its tax year from 6 April and only counts days you are in the UK at midnight, while Portugal, Greece and New Zealand look at any 12-month period. This calculator applies each country's own rule.
If I spend fewer than 183 days somewhere, am I not tax resident there?
Not necessarily. Day counts are only one test. In the UK, the sufficient ties test can make you resident with far fewer days, and in Canada you can be factually resident through ties such as a home or family there. Treat the day count as a warning light, not the final answer.
Can I be tax resident in two countries at once?
Yes. Each country applies its own rules, so you can meet two countries' tests in the same year. Most tax treaties contain tie-breaker rules that decide which country can tax you as a resident, so check the treaty between the two countries and take advice.
Do the days I arrive and leave count?
It depends on the country. Canada, Ireland, Australia and New Zealand count any part of a day. The UK counts a day only if you are in the country at midnight, and Portugal counts days that include an overnight stay. The calculator counts each country the way its tax authority does.
Which countries do not use a simple day count?
Germany has no days-per-year test: a continuous stay of more than six months creates a habitual abode, and a home you keep and use can make you resident on its own. Japan looks at whether your base of life is in Japan or you have lived there continuously for a year or more. These countries are not included in the calculator.
Related calculators
- UK Statutory Residence Test: the full UK test including ties
- US Substantial Presence Test: the IRS weighted three-year formula
- US state residency day counter: day thresholds for every US state
Disclaimer: This tool is for information only and is not legal, tax or immigration advice. Rules change and can depend on your circumstances. Rules checked against HMRC, the IRS, the ATO, Revenue (Ireland), Inland Revenue (NZ), the Portuguese tax authority and the Spanish income tax law in November 2026.
