The 183-Day Rule by Country: Where 183 Days Is Not the Rule

Is 183 days the rule everywhere? No.

Thailand uses 180 days. Malaysia uses 182. Taiwan has two thresholds, 90 and 183. South Korea has just added a test measured in consecutive days across two tax years. Italy counts fractions of days. India can make you resident on 60. Mexico, France, Canada, and New Zealand do not start from a day count at all. The United States reaches 183 only through a weighted three-year formula. And the United Kingdom, which does use 183, counts midnights rather than days.

This is a reference post on the 183-day rule by country: the real threshold, how a day is counted, and what the second test is when the day count is not the whole story. It sits underneath our complete guide to the 183-day rule and the overview of how international tax residency works. Where I could not confirm something against a primary source, I say so.

The master table

Country	Primary test	Day threshold	How a day is counted	Second limb	2026 status
Thailand	Days present in a calendar year	180	Any day of presence	None	Threshold unchanged
Malaysia	Days present in a calendar year	182	Any day of presence	90 days plus prior-year residence (see note)	Threshold unchanged
Taiwan	Days present in a calendar year	90 and 183	Any day of presence	Under 90 days, foreign-employer salary untaxed	Unchanged
South Korea	Domicile, or days in a tax year	183	Any day of presence	183 consecutive days spanning two tax years	New limb from 1 Jan 2026
Italy	Greater part of the tax period	183, or 184 in a leap year	Fractions of a day count	Domicile, residence, registry presumption	2024 rules bedding in
India	Days present in the tax year	182	Any day of presence	60 days plus 365 across four prior years	Confirmed by 2026 ITAT ruling
Mexico	Home, then center of vital interests	None	Not applicable	Over 50 percent of income from Mexican sources	Unchanged
France	Foyer or principal place of stay	None	Longest-stay comparison	Professional activity, or economic interests	Unchanged
Canada	Significant residential ties	183, deemed only	Sojourning days	183-day deeming for those without ties	Unchanged
United Kingdom	Statutory Residence Test	183	Midnights	Automatic tests, ties, 30-day deeming rule	Non-dom regime gone
Ireland	Days present in the tax year	183	Present at any time in the day	280 days over two years, 30 in each	Unchanged
Indonesia	Presence, or intent to reside	183 in any 12 months	Any day of presence	Intent to reside, evidenced by permits	Unchanged
New Zealand	Permanent place of abode	183 in any 12 months	Part-days count as whole days	183 days backdates to the first day	Unchanged
United States	Substantial Presence Test	183 weighted, plus 31 current-year	Any part of a day	Green card test; closer connection exception	Unchanged
UAE	Cabinet Decision 85 of 2022	183 in a rolling 12 months	Any day or part of a day	90 days plus permit and home or work	Unchanged

Two cells carry qualifications worth stating up front: Malaysia's second limb and Indonesia's permit-based evidence of intent are the items I could not verify against a primary source this week.

Is the 183-day rule the same in every country?

No, and it fails in three independent ways.

The number differs. 180 in Thailand, 182 in Malaysia, 183 in most places, 184 in Italy in a leap year. These look like rounding. They are hard statutory lines, and one day on the wrong side changes your worldwide tax position for the year.

The counting method differs. Most countries count any presence during a calendar day. The UK counts only where you are at midnight. Italy counts fractions of days. Portugal counts days including an overnight stay.

The period differs. Thailand, Malaysia, Taiwan, Korea, Italy, Ireland, and Spain measure a calendar year. India measures 1 April to 31 March, the UK 6 April to 5 April. New Zealand, Indonesia, Portugal, and the UAE measure a rolling 12 months, so the count never resets and a stay straddling New Year is not two separate stays.

Three independent variables. There are more distinct counting regimes here than there are countries.

Which countries use a number other than 183?

Thailand: 180 days in a calendar year. The Revenue Department's English guidance describes a resident as a person residing in Thailand for periods aggregating more than 180 days in any tax (calendar) year; PwC, reviewed 24 August 2026, says 180 days or more. That two-word difference matters at exactly one point on the calendar, and the safe assumption is that 180 is the line. The rule sits in the Revenue Code's personal income tax provisions, commonly cited as section 41, though neither source prints the section number, so treat that citation as indicative. Thailand's immigration allowance is a wholly separate count, and it changed in September 2026; our Thailand entry rule guide covers it.

Malaysia: 182 days in a calendar year. An individual in Malaysia for periods amounting to 182 days or more in a calendar year is a tax resident under the Income Tax Act 1967 (PwC, reviewed 16 June 2026). Malaysia is also widely described as having further limbs in section 7 of that Act, including a 90-day test for someone resident or present 90 days or more in three of the four immediately preceding years. I could not reach the Inland Revenue Board's guidance or the statutory text, so that second limb is unverified here.

Taiwan: 90 days and 183 days. A foreign individual staying 183 days or more in a calendar year is a resident. Below that, the 90-day line governs what gets taxed: under 90 days, remuneration from an entity registered outside Taiwan is exempt. Cross 90 days and that exemption disappears, with a flat 18 percent on Taiwan taxable salary income regardless of where it is paid (PwC, reviewed 20 August 2026). For a remote worker on a foreign payroll, 90 is the number that costs money. Taiwan's immigration count runs on a third rule again, starting the day after arrival (Taiwan visitor guide).

Does the day of arrival count for the 183-day rule?

In most of the world, yes, and so does the departure day. Ireland states it most clearly. Section 819(4) of the Taxes Consolidation Act 1997 deems you resident for a day if you are present in the State at any time during that day, per Revenue's Tax and Duty Manual Part 34-00-01, updated February 2025. Before 2009 Ireland used a midnight test; it does not any more. New Zealand is blunter: parts of days, such as the day you arrive and leave, count as whole days. The UAE's Federal Tax Authority takes the same position, and the United States counts you as present on any day you are physically in the country at any time.

The United Kingdom is the outlier. Under the Statutory Residence Test in Schedule 45 of the Finance Act 2013, you spend a day in the UK if you are present at the end of the day, that is, at midnight. An arrival at 11 pm is a UK day; a departure at 6 am is not. Our guide to the 2026 Statutory Residence Test works through what that does to the tie tables.

Italy goes the other way. Under Legislative Decree 209/2023, explained in Agenzia delle Entrate Circular 20/E of 4 November 2024, residence follows from physical presence for the greater part of the tax period, 183 days or 184 in a leap year, and the circular addresses expressly how fractions of a day count. On the ordinary reading both travel days count in full.

Does a layover count as a day of presence?

Sometimes, and it turns on whether you cleared immigration.

United States: generally no, under 24 hours. The IRS excludes days you are in the US for less than 24 hours while in transit between two places outside the United States. Change planes at Dallas between London and Mexico City under 24 hours and it is not a US day; stop over for two nights and it is two days. The same list excludes regular commuters from Canada or Mexico, crew of foreign vessels, and days you could not leave because of a medical condition that arose in the US.

Ireland: no, if you stay airside. You are not regarded as present for any period during which you arrive in and depart from the State and remain throughout in a part of an airport or port not accessible to the public. Walk through the arrivals hall and the exclusion is gone.

United Kingdom: no, on a genuine transit day. HMRC treats a day spent purely in transit as not counting, provided you arrive and depart without engaging in activities substantially unrelated to your passage, and do not stay overnight.

Italy: no comparable carve-out. Where the test counts fractions of days, a layover is presence.

Ireland also disregards a day where force majeure prevented you leaving on your intended departure day, and the UK allows up to 60 days a year for exceptional circumstances, interpreted narrowly.

Is the 183-day rule consecutive?

Almost never. Day counts aggregate, and assuming otherwise is the most common single error. Ireland counts 183 days in total in the tax year, Malaysia periods amounting to 182 or more, Thailand periods aggregating 180. New Zealand's days need not be consecutive, and the UAE counts 183 days within a 12-month period, consecutive or not. Twelve two-week trips are indistinguishable from one six-month stay.

The exception is new, and it is South Korea. Korea's ordinary test makes you resident if you have a domicile in Korea or a residence in Korea for 183 days or more in a tax year. Effective for tax years beginning on or after 1 January 2026, a further provision treats as resident an individual having a residence within Korea for consecutive 183 days over two tax year periods. This comes from PwC's Worldwide Tax Summaries page for Korea, reviewed 2 July 2026. I have not confirmed it against the Korean Income Tax Act or a National Tax Service publication, so treat the wording as indicative and the change itself as reliable but second-hand.

The effect, if it works as described, closes the autumn-to-summer gap: someone arriving in September and leaving in June could previously stay under 183 days in each of two calendar years while continuously present for far longer. The immigration side runs on its own clock (K-ETA guide).

Which countries count fractions of days, and which count midnights?

Four methods are in use.

Any presence during a day. The majority rule: Ireland, New Zealand, the United States, the UAE, Thailand, Malaysia, Taiwan. Arrival day counts, departure day counts, a two-hour visit counts.

Midnights. The UK's method, more generous by roughly one day per trip, which is why UK counts imported from another country's log run high.

Fractions of days. Italy's method under Circular 20/E, drafted to capture presence at a finer grain.

Overnight stays. Portugal, under article 16 of the CIRS, counts any day, complete or partial, that includes an overnight stay in Portuguese territory.

The UK's midnight rule has a counterweight people miss. Under the 30-day deeming rule, if you have at least three UK ties, were UK resident in one or more of the previous three tax years, and have more than 30 days in the year on which you were present but not at midnight, the excess over 30 counts as days spent in the UK.

One trip, three answers: a worked example

You land at 11 pm on 1 June and take a 6 am flight out on 10 June. Ten calendar dates; you sleep in the country on nine of them.

UK midnight rule: 9 days. You are present at the end of 1 June through 9 June. On 10 June you are gone by 6 am, so that date does not count. With three UK ties and recent residence, that morning could still be pulled back in once your annual total of such days passes 30.

Italy's fractions rule: 10 days. Every date on which any part of the day was spent in Italy counts, including the two hours before a 4 am taxi.

US Substantial Presence Test: 10 days. Any part of a day counts, and the transit exception does not apply because you left the airport.

One trip, a spread of one day. Run ten such trips and your UK and Italian counts differ by ten days on identical travel. Near a threshold that is not a rounding error, it is the answer. Feed those ten US days into the weighted formula and it compounds across three tax years.

Can I be tax resident with fewer than 183 days?

Yes, four different ways.

India: 60 days plus a look-back

Under section 6 of the Income-tax Act 1961, you are resident if present for 182 days or more in the tax year, or for 60 days or more in the year and 365 days or more in aggregate across the four preceding tax years (PwC, reviewed 12 May 2026). The Indian tax year runs 1 April to 31 March. Most people remember only 182, because Indian citizens leaving for employment abroad, and crew members, have the 60-day limb relaxed to 182. The critical qualification is that the relaxation applies only in the year of departure.

The Income Tax Appellate Tribunal in Bengaluru made that point in a ruling reported on 9 January 2026 involving Binny Bansal, for assessment year 2019-20. He was in India about 141 days, well under 182, and was still held resident under the second limb. The tribunal rejected the 182-day relaxation because he had left India in the earlier financial year, and on the India-Singapore tie-breaker in article 4(2) found his center of vital interests and habitual abode aligned with India, refusing relief on the capital gain. Reported via India Briefing, 30 January 2026; I have not read the order itself, so treat the reasoning as reported rather than quoted.

Two wrinkles: for Indian citizens and persons of Indian origin visiting India whose India-sourced income exceeds INR 1.5 million, the second limb bites at 120 days rather than 60; and an Indian citizen with India-sourced income above that figure who is not liable to tax in any other country by reason of domicile or residence can be a deemed resident regardless of days. Your four-year look-back does not clear when you move. Our India e-visa guide covers the separate 180-day immigration cap.

The UAE: 90 days plus ties

Cabinet Decision No. 85 of 2022, effective 1 March 2023, gives a natural person three routes: a usual or primary place of residence with the center of financial and personal interests in the UAE; 183 days or more of presence in a consecutive 12-month period; or 90 days or more in a consecutive 12-month period where the person is a UAE or GCC national or holds a valid UAE residence permit, and either has a permanent place of residence in the UAE or carries on employment or a business there. Ministerial Decision No. 27 of 2023 defines a permanent place of residence as a furnished dwelling continuously available to you, owned or rented (UAE 90-day guide). For anyone counting UAE days downward, that is a threshold at half the number they were watching.

The United States: about 122 days a year

The test is met if you were present at least 31 days in the current year and your weighted three-year total reaches 183: all days this year, plus one third of last year's, plus one sixth of the year before that. 120 days a year gives 120 + 40 + 20 = 180, and you are under. 122 days a year gives 122 + 40.67 + 20.33 = 183, and you are over. The practical threshold for a regular visitor is about 122 days a year, not 183. Our Substantial Presence Test calculator runs the formula, and our US Substantial Presence guide covers the exempt categories.

Two escape routes exist. Exempt individuals, including certain students, teachers, trainees, and foreign government-related individuals, do not count their days at all and file Form 8843. And the closer connection exception preserves non-resident status for someone present fewer than 183 actual days in the current year with a tax home and closer connection abroad, claimed on Form 8840.

Indonesia: potentially from day one

Indonesia treats an individual as resident if they reside in Indonesia, are present for more than 183 days in any 12-month period, or are present during a fiscal year and intend to reside there (PwC, reviewed 11 June 2026). The third test removes the floor: intent, evidenced at arrival, can make you resident with no day count at all. Ministry of Finance Regulation 18/PMK.03/2021 sets out how intent is demonstrated, and is widely described as treating a visa or stay permit valid for more than 183 days, such as a KITAS or KITAP, as evidence of it. I could not retrieve the text of PMK-18/2021 from the Ministry's legal database, so that criterion is unverified here. What is verified is the structure: presence plus intent is a route to residency that does not need 183 days (Indonesia visa guide).

Which countries don't start from a day count at all?

Four of the countries above put the day count second, or nowhere.

Mexico has no day count. Article 9 of the Código Fiscal de la Federación makes you resident if you have established your casa habitación, your home, in Mexico. If you also have a home abroad, you are resident in Mexico if your centro de intereses vitales is in Mexican territory, which the article says is the case when, among other situations, more than 50 percent of your total income in the calendar year has its source of wealth in Mexico, or the principal center of your professional activities is in the country. Mexican nationals are presumed resident unless they prove otherwise. No day threshold appears in the article, and PwC, reviewed 6 August 2026, confirms the absence. The 180-day allowance in our Mexico visitor guide is immigration, a different number for a different purpose.

France has no 183-day rule either. Article 4 B of the Code général des impôts makes you fiscally domiciled in France if you have in France your foyer or your lieu de séjour principal; or you carry on a professional activity there, salaried or not, unless ancillary; or you have in France the centre de vos intérêts économiques. No number appears in the article. The principal-place-of-stay limb is a comparison, not a threshold: it asks where you spent more time than anywhere else, which a nomad splitting a year across five countries can satisfy well under 183 days.

Canada starts from ties. The Canada Revenue Agency begins with significant residential ties: a home in Canada, a spouse or common-law partner, dependants, supported by secondary ties such as personal property, bank accounts, and provincial health insurance. The 183-day rule is a deemed resident rule, for someone who stayed in Canada 183 days or more in the year, had no significant residential ties, and is not resident of another country under a treaty. The day count catches people with no ties; it does not protect people who have them. CRA's page does not spell out how part-days are treated for sojourning, so I am not asserting a rule on that. The separate 730-day obligation under section 28 of IRPA in our Canada PR guide is immigration, not tax; never run the two counts together.

New Zealand's permanent place of abode overrides everything. Inland Revenue makes you resident if you have a permanent place of abode there, a place you usually live and can call home, whether or not you own it or occupy it continuously. That test has no day count. Separately, you are resident if in New Zealand more than 183 days in any 12-month period, part-days counting as whole days. The sting is the timing: residency is backdated to the first of the 183 days, so crossing the line in November makes you resident from the previous year. Ceasing requires no permanent place of abode and more than 325 days abroad in 12 months, backdated the same way.

What changed in 2026?

South Korea added a consecutive-days test, effective for tax years beginning on or after 1 January 2026, on PwC's account. It is the one genuinely new threshold here, and the one I would most like a primary source for.

Italy's 2024 rules are bedding in. Legislative Decree 209/2023 rewrote article 2 of the Italian Tax Code from 2024, and Circular 20/E of 4 November 2024 explains it. Physical presence for the greater part of the tax period is now a standalone criterion, so someone working remotely from Italy for more than half the year is resident without anything else being true. And registration in the resident population registry is now only a rebuttable presumption of tax residence, salvo prova contraria. The circulating version of this, that AIRE registration is now a rebuttable presumption, gets it backwards: AIRE is the register of Italians resident abroad, and the presumption that changed attaches to the domestic registry.

The UK's non-dom regime is gone, replaced from 6 April 2025 by a residence-based system with a four-year foreign income and gains relief for new arrivals, and inheritance tax now turning on long-term residence, generally 10 of the previous 20 tax years, rather than domicile. The day count did not change; what turns on it did. Our SRT calculator runs the three parts in statutory order.

Thailand's threshold has not moved. What has drawn attention is the treatment of foreign income remitted into Thailand by Thai residents, and the Destination Thailand Visa as a long-stay route that makes 180 days easy to reach unintentionally. I have not verified the current remittance rules and so am not stating them.

Nothing changed in the day-count tests for the other eleven jurisdictions above that I could identify. One country I deliberately left out is Cyprus: the sources conflict about the shape of its 2026 reform, and a hole in the table beats a wrong row.

How should you log a day so it works everywhere?

A multi-country log has to be richer than the counters that consume it.

Log the calendar date and location, not the trip. A trip from 1 to 10 June is nine UK days and ten Italian days; only a per-date record produces both.

Record where you were at midnight, separately from presence during the day. This is the one field that distinguishes a UK count from every other count, and it cannot be reconstructed from a boarding pass later.

Record airside transits as transits. The US, Irish, and UK exclusions turn on facts about the layover: under 24 hours, airside only, nothing unrelated to your passage.

Use each country's own period. India's year ends 31 March, the UK's 5 April; New Zealand, Indonesia, Portugal, and the UAE roll. A calendar-year spreadsheet is wrong in seven of the fifteen jurisdictions above.

Keep the look-backs alive. India looks back four years, the US weights three, the UAE rolls 12 months from any point, Ireland looks at the previous year.

Keep it contemporaneous. Every authority here treats a record kept at the time as more credible than one assembled after an inquiry opens, and that has only strengthened as passport stamps disappear behind biometric entry-exit systems.

How iReside handles this

The reason iReside is not a single 183-day counter is the table at the top of this post: one counter has to pick one threshold, one method, and one period, and in doing so is wrong for most of the world. iReside records the country, state, or province you were in each day from your device's location, then applies each jurisdiction's own rule to that record. The 45 visa and residency rulebooks encode the differences: Thailand's 180 against Malaysia's 182, the UK in midnights against Ireland at any moment, India's four-year look-back, the US weighted formula, the UAE's rolling 12 months against Spain's calendar year, New Zealand's backdating. One log, many counters, each running the rule the jurisdiction actually wrote, with alerts against that country's number rather than a generic one.

For a quick check against a single jurisdiction, our 183-day rule calculator is free and runs in your browser.

Track your days by each country's own rules with iReside.

This article is for informational purposes only and does not constitute tax, legal, or financial advice. Day-count rules change, and several sources below are professional summaries rather than primary law. Consult a qualified adviser in the relevant jurisdiction before relying on any threshold here.

Sources

• Agenzia delle Entrate, Circolare n. 20/E, 4 November 2024 — Italy's residence criteria under Legislative Decree 209/2023: 183 days, 184 in a leap year, fractions of a day, and the resident registry as a rebuttable presumption.
• Irish Revenue, Tax and Duty Manual Part 34-00-01 — sections 819(1), (2) and (4) TCA 1997: 183 days, the 280-day look-back, the 30-day disregard, presence at any time in a day, and the airside transit exclusion. Updated February 2025.
• IRS, Substantial Presence Test — the 31-day and weighted 183-day formula, the under-24-hour transit exclusion, commuters, crew, medical conditions, exempt individuals, Form 8843. Accessed 8 September 2026.
• IRS, Closer Connection Exception to the Substantial Presence Test — Form 8840. Accessed 8 September 2026.
• Légifrance, Code général des impôts, article 4 B — foyer, lieu de séjour principal, professional activity, center of economic interests. No day threshold appears.
• Código Fiscal de la Federación, artículo 9 (Cámara de Diputados consolidated text) — casa habitación, centro de intereses vitales, the 50 percent income test, the principal center of professional activities.
• Canada Revenue Agency, Determining your residency status — significant residential ties, secondary ties, and the 183-day deemed resident rule. Accessed 8 September 2026.
• Inland Revenue New Zealand, Tax residency status for individuals — permanent place of abode, the 183-day rule in any 12-month period with part-days counting as whole days and backdating, and the 325-day rule.
• Thai Revenue Department, Personal Income Tax — the Thai residence definition. Accessed 8 September 2026.
• PwC Worldwide Tax Summaries, Republic of Korea — Residence — the 183-day test and the consecutive-183-days provision for tax years beginning on or after 1 January 2026. Reviewed 2 July 2026.
• PwC Worldwide Tax Summaries, Malaysia — Residence — the 182-day test. Reviewed 16 June 2026.
• PwC Worldwide Tax Summaries, Taiwan — Residence and Taxes on personal income — the 183-day residence test and the 90-day threshold for foreign-employer remuneration. Reviewed 20 August 2026.
• PwC Worldwide Tax Summaries, India — Residence — section 6 tests, the 182-day relaxations, the 120-day rule, and deemed residence. Reviewed 12 May 2026.
• PwC Worldwide Tax Summaries, Indonesia — Residence — the 183-day and intent-to-reside tests. Reviewed 11 June 2026.
• PwC Worldwide Tax Summaries, United Arab Emirates — Residence — Cabinet Decision 85 of 2022, effective 1 March 2023, and the three residence routes. Reviewed 12 March 2026.
• PwC Worldwide Tax Summaries, Mexico — Residence — confirmation that Mexico applies no day-count test. Reviewed 6 August 2026.
• PwC Worldwide Tax Summaries, Portugal — Residence — the rolling 12-month window and the overnight-stay day test under article 16 CIRS. Reviewed 24 July 2026.
• India Briefing, Binny Bansal tax residency ITAT ruling — about 141 days in India, residence under the 60-day limb, the departure-year limit on the 182-day relaxation, and the India-Singapore article 4(2) outcome. Published 30 January 2026.
• HMRC, RDR3: Statutory Residence Test guidance note — HMRC's interpretation of Schedule 45 to the Finance Act 2013, including the midnight rule, transit days, exceptional circumstances, and the deeming rule.