Tax and residence
183-Day Rule for Tax Residency: How Days Are Counted
The 183-day rule is a day-count test: where a country uses it, spending 183 days or more there in its tax year or another 12-month period, depending on the country, makes you tax resident. It sits alongside other tests. The UK, for example, also treats you as resident if your only home was there for 91 days in a row or through ties such as work and family, so keep a dated travel log and check each country’s full rules for the year.
By DmytroUpdated 8 min read
Short answer
- UK example (tax year 6 April to 5 April): 183 days or more in the UK makes you automatically resident; fewer than 16 days, or 46 if you were not resident in the 3 previous tax years, usually makes you non-resident.
- Staying under 183 days can still make you resident through a home, full-time work or ties such as family, depending on the country’s tests.
- If two countries treat you as resident, the tax treaty between them decides the overlap through its residence article, with tie-breaker rules, and its relief provisions.
- Keep a raw travel log (dates, local times, where you slept, work days) apart from the legal count; the tax residence day counter organizes it by country and year.
Residence day tests on our country pages
- Thailand180 days180 days in a calendar year
- Malaysia182 days182 days in the year (one Section 7 test)
- Colombia183 daysMore than 183 days in any 365-day period
- Cyprus183 days183 days, or the 60-day rule
- Estonia183 daysPlace of residence, or 183 days in 12 months
- Georgia183 days183 days in a continuous 12-month period
- Indonesia (Bali)183 daysOver 183 days in 12 months, or intention to reside
- Portugal183 daysOver 183 days in 12 months, or a habitual home
- Serbia183 days183 days in 12 months, or home / centre of interests
- Spain183 daysMore than 183 days in a calendar year
What the 183-day rule means
A day count is one residence test, applied country by country and tax year by tax year.
List every country where you lived, worked or kept significant connections during the year. For each one, find the tax authority’s residence guidance and note the period it tests: the UK, for example, uses a tax year from 6 April to 5 April. An immigration limit on your stay is a different rule from the tax residence test.
Where a country has a 183-day test, 183 days or more in the period it tests (its tax year or another 12-month period) makes you resident there. The other tests in the same country, such as having a home or working there, can make you resident with fewer days, and a second country can treat you as resident at the same time.
Checklist
- Country and tax year written down.
- Official residence guidance saved.
- Arrival, departure and work days available.
- Other residence tests in that country identified.
Example: the UK residence tests
The UK combines day counts with home, work and ties tests.
HMRC’s guidance gives a clear example of how a 183-day test fits into a wider system. You are UK resident for a tax year only if you meet one of the automatic UK tests or the sufficient ties test, and none of the automatic overseas tests.
| Test | Condition | Result |
|---|---|---|
| Automatic overseas test | Fewer than 16 days in the UK, or fewer than 46 days if you were not UK resident in the 3 previous tax years | Usually non-resident |
| Automatic overseas test | Full-time work abroad (an average of at least 35 hours a week) and fewer than 91 days in the UK, no more than 30 of them spent working | Usually non-resident |
| Automatic UK test | 183 days or more in the UK in the tax year | Resident, if no overseas test applies |
| Automatic UK test | Your only home was in the UK for 91 days or more in a row, and you spent at least 30 days in it during the tax year | Resident, if no overseas test applies |
| Automatic UK test | Full-time work in the UK for any 365-day period, with at least one day in the tax year | Resident, if no overseas test applies |
| Sufficient ties test | A number of days in the UK combined with ties such as work or family | Can make you resident |
How days are counted
Record raw facts first; each country then applies its own counting rule.
Record arrival and departure dates, local times, where you slept, the work you did and any transit. Keep tickets and booking confirmations with each trip, and mark uncertain days instead of leaving them out.
Example: arriving on 10 May and leaving on 12 May touches three calendar dates but covers two nights. Countries count differently, so keep both facts and apply the counting rule of the country you are assessing, with a note explaining any day you exclude.
Example: one calendar year, two countries
Example: a total close to 183 days
Show unresolved travel dates as a range instead of rounding them away.
Example: 180 days are backed by evidence, and four travel dates have unclear arrival, departure or transit facts. Your factual range is 180 to 184 days before the legal counting rule is applied, so a single figure of 180 would hide the question that matters. Keep the four dates separately with tickets and local times, then find out how the country counts them.
A final count below 183 still leaves the home, work, ties and treaty questions to answer. The tax residence day counter organizes the file under its stated assumptions; the residence decision applies the country’s full tests.
Why fewer than 183 days can still mean residence
Homes, work and family are tested alongside the day count.
A spreadsheet showing fewer than 183 days in each country leaves out the other conditions in domestic law. In the UK, an only home used for 91 days in a row, full-time work in the UK or ties such as work and family can each lead to residence with far fewer days. A residence permit or a tax number abroad is evidence too, and it sits alongside these tests.
Keep a dated list of the homes available to you, where your family lived and where you worked. When a bank asks for a tax self-certification, give the residence you can support; if it is still unresolved, get it assessed first.
Resident in two countries: treaty tie-breakers
The treaty decides the overlap after each country has applied its own rules.
If the domestic rules of two countries both treat you as resident, check whether a tax treaty between them applies. Its residence article contains the tie-breaker rules that decide which country counts as your residence for the treaty, and its relief provisions say how double taxation is removed. Read the article of the actual treaty, since treaties differ.
Ask what the treaty result changes for each type of income and which returns, residence certificates or relief claims you still need to file. The other country can keep filing or reporting requirements even when the treaty assigns your residence elsewhere.
Moving abroad: document the change
Departure paperwork and the legal residence test are separate steps.
Deregistering from an address and ending tax residence follow different rules, and the country’s legal test decides residence. Establish that test, the date your facts actually changed and any separate notification or return the country requires.
A useful request to an adviser includes your departure date, old and new housing, work pattern, where your family lives and your income types. Ask whether split-year treatment, continuing income from that country or departure rules need separate analysis.
Build one evidence pack
Keep enough detail to explain your position the same way every time.
Use one folder per year and country, with an index linking each travel-log entry to tickets, accommodation records and official letters. Card payments help confirm a timeline; tickets and stamps show where you physically were.
If you hold crypto, the same evidence pack supports crypto tax reporting. As checked on 9 Sep 2026, the OECD lists first exchanges under its Crypto-Asset Reporting Framework (CARF) for 2027, 2028 or 2029, depending on the jurisdiction.
Step by step
- Reconcile travel dates with evidence.
- List the facts that are still uncertain.
- Get a residence assessment for each relevant country.
- Keep the advice, filings and updated self-certifications together.
FAQ
What is the 183-day rule?
A day-count test for tax residence: where a country uses it, 183 days or more in its tax year or another 12-month period, depending on the country, makes you resident. The UK applies it to the tax year from 6 April to 5 April, alongside home, work and ties tests.
If I stay under 183 days, am I non-resident?
Possibly, but other tests can still make you resident. In the UK, an only home used for 91 days in a row, full-time UK work or ties such as family can lead to residence, while fewer than 16 days usually means non-resident.
How are days counted?
Each country sets its own rule and its own tax year. Keep arrival and departure dates with local times and where you slept, so that whichever counting rule applies can be used.
Does the day counter tell me where I am tax resident?
It counts and organizes your days by country and tax year under its stated assumptions. The residence decision applies each country’s full tests and any tax treaty.
Does leaving a country end all tax obligations there?
Each country applies its own departure and residence rules. Ask separately about residence, income connected to that country and the returns required for the year you leave.
What should I send a tax adviser?
Your dated itinerary, housing and family facts, work locations, income types, previous returns and official letters, with any missing evidence listed.
Sources
Tax, visa and residence rules depend on your situation, so confirm them with the official authority. How we compare