You can acquire tax residency in a country without ever spending 183 days there in a calendar year. In New Zealand, more than 183 days in any 12-month period make you resident, and the status is backdated to the first of those days (Inland Revenue, 2026).
For an investor, the status decides which State can tax your income and gains wherever they arise, which makes it the first question of international tax planning. Most people answer it by counting to 183. The count depends on who is counting.
Tax residency is the personal link on which a State bases a full liability to tax. Article 4(1) of the OECD Model Tax Convention only records the result: a resident is a person liable to tax under a State's laws “by reason of his domicile, residence, place of management or any other criterion of a similar nature”. On the conditions, States “take their stand entirely on the domestic laws” (OECD, 2017).
What the status triggers is scope. In the words of New Zealand's Inland Revenue (2026): “The worldwide income of a New Zealand tax resident is subject to New Zealand tax laws”, while non-residents are liable “only on their New Zealand-sourced income”.
| Status | Usually taxed on | What that means for a portfolio |
|---|---|---|
| Resident | Worldwide income and gains | Dividends, interest, rents and gains, wherever they arise |
| Non-resident | Income arising in the country | Local-source income only, such as rent from a local property |
Resident does not always mean taxed on everything. The UAE does not levy income tax on individuals, so UAE residence matters mostly for treaties and for the other country's rules, which still apply. When two States each treat you as resident, each can claim the same income: the root of being taxed twice on the same income.
The laws read for this guide draw on five families of tests.
Spain also presumes residence where your spouse and dependent minor children live there. These laws often combine several families, so failing one test does not close the question. Companies have tests of their own, “place of management” being one criterion of Article 4(1): a separate subject.
Days of presence, a home, a centre of interests, ties weighed together and registration: national laws often combine several of these families, so failing one test does not close the question.
Side by side, the familiar figure splits into several.
| Jurisdiction | Headline test | Counted over | What counts as a day |
|---|---|---|---|
| United Kingdom | Statutory Residence Test: days and ties. 183 days or more settles it | Tax year, 6 April to 5 April | Presence at midnight |
| United States | Citizens and green card holders: always. Others: 31 days in the current year and 183 days over three years, counting all the days of the current year, 1/3 of the first preceding year and 1/6 of the second | Calendar year, three-year look-back | Any time during the day, with listed exceptions |
| United Arab Emirates | 183 days or more; or 90 days or more with conditions; or usual or primary place of residence and centre of financial and personal interests in the UAE | “The relevant 12 consecutive months” | All days or parts of a day |
| Singapore | 183 days or more of presence or employment | Calendar year before the Year of Assessment | Weekends and public holidays included |
| Ireland | 183 days or more, or 280 days over two tax years | Tax year, 1 January to 31 December | Any part of a day |
| New Zealand | More than 183 days, or a permanent place of abode | Any 12-month period | Parts of days count as whole days |
| Spain | More than 183 days, or main core of economic interests | Calendar year | Sporadic absences count unless residence elsewhere is proven |
| France | Household or main place of stay, work, or main business interests. No day threshold in the statute | Not a day count | N/A |
Rules as published by each tax authority, read in October 2026.
“183 days or more” and “more than 183 days” are two rules. Exactly 183 days of presence meet the day test in Ireland, the UAE, the United Kingdom and Singapore, not in Spain or New Zealand. France has no statutory figure: its administration treats a stay of more than six months as the main place of stay as a general rule only.
United Kingdom. Below 183 days the answer depends on the ties you keep in the country, under the Statutory Residence Test. The UK tax residency rules have their own guide.
Singapore. The 183 days are the headline only: the tax authority reads them with administrative practices of its own. Tax residency in Singapore has its own guide.
Take an investor who lives in Ireland and spends one long stay in New Zealand, from 1 September 2025 to 15 March 2026, both travel days counted. Ireland's Revenue (2025) counts by tax year, 1 January to 31 December; New Zealand over any 12-month period. Both count any part of a day, so only the period differs.
Illustration only: one stay; every other day is treated as a day in Ireland, travel time ignored; arrival before 1 April 2026, so New Zealand's visitor rule for later arrivals is not in play.
| Count | Days | Result |
|---|---|---|
| New Zealand stay, calendar year 2025 (30 + 31 + 30 + 31) | 122 | Under 183 |
| New Zealand stay, calendar year 2026 (31 + 28 + 15) | 74 | Under 183 |
| Same stay, any 12-month period | 196 | More than 183: New Zealand resident, backdated to 1 September 2025 |
| Days in Ireland, tax year 2025 (1 January to 31 August) | 243 | 183 or more: Irish resident |
| Days in Ireland, tax year 2026 (16 March to 31 December) | 291 | 183 or more: Irish resident |
Counted by calendar year, the stay never reaches the threshold. Counted over twelve consecutive months, it passes it by 13 days, and each country treats you as resident for the same months.
The days did not change; the period used to count them did.
The OECD moved its own 183-day rule for employment income (Article 15, not a residence test) from a fiscal-year count to “any twelve month period” because long stays were being split across two years.
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Begin Your Journey With UsFour mismatches can produce dual residence.
A treaty answer does not always erase the domestic one. The United Kingdom keeps filing obligations for a person who is treaty-resident elsewhere; France, in a notice of March 2025, treats such a person as non-resident for its domestic law too.
The reverse follows from the same rules: a year split over two counting periods can fall under the threshold in both. Some laws close that gap: Spain counts sporadic absences as presence unless you prove tax residence elsewhere. Being under 183 days everywhere does not make you resident nowhere, and a person resident nowhere still meets source-country tax on local income.
A tax treaty between the two States, where one exists, does not leave both claims standing. Article 4(2) of the OECD Model assigns the person to one State, for the purposes of the treaty, through tests applied in a fixed order. How they run is the subject of the treaty tie-breaker for dual residents.
No. New Zealand's Inland Revenue says so in terms: immigration status decides whether you can stay, tax residency what taxes you pay.
The UAE writes the separation into law. Under Cabinet Decision No. 85 of 2022, issued 2 September 2022 and effective 1 March 2023, a natural person is a Tax Resident where any one of three conditions is met:
Under Ministerial Decision No. 27 of 2023, “All days or parts of a day” count and need not be consecutive; the permanent place need not be owned but must be continuously available (UAE Ministry of Finance, 2023).
On the 90-day route the permit is one of three cumulative elements, and a temporary entry permit for tourism is not a Residence Permit.
| Status | What it is | Does it make you tax resident? |
|---|---|---|
| Residence visa or permit | A right to stay or work | Not by itself in New Zealand or the UAE; in the United States a green card is the test |
| Nationality | A passport | Secondary in the rules read, as on the UAE 90-day route; the United States, the exception, keeps taxing citizens who live abroad |
| Domicile | A word that changes meaning by country | In the United Kingdom it stopped deciding the tax on foreign income on 6 April 2025; in Italy and France it names tax residence or one of its criteria |
Residence-by-investment programmes grant a right to stay; the tax test is read separately.
Immigration status decides whether you can stay, tax residency what taxes you pay. A permit grants a right to stay, and the tax test is read separately.
The laws read for this guide show three models for the year you arrive or leave.
By inference, a mid-year move from a country that cuts the year to one that takes it whole can produce an overlap of several months.
Proof is yours to keep. The United Kingdom expects records and documents supporting your statements, and the UAE authority works from an official entry and exit report. The method is a day log kept under each country's own definition of a day, with the documents behind it: travel records, proof of a home, proof of work. Banks ask too: under the Common Reporting Standard you self-certify each jurisdiction of tax residence; how accounts are then reported is a separate subject.
A certificate of tax residence is the document a foreign authority asks for when treaty relief is claimed. What the country you left still taxes, and the order of steps around a move (exit charges, inbound regimes), are separate subjects. The tax answer is only one part of financial planning when you move abroad.
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Tax residency is the personal link on which a State bases a full liability to tax, under conditions set by national law. A resident is generally taxed on worldwide income, a non-resident on income arising in the country.
By tests that fall into five families:
Several can apply at once. Contact us for more information.
No. Domicile is a word that changes meaning by country. In Italy it names one of the residence criteria, and in France tax residence itself.
Yes. Countries count over different periods and apply different kinds of test, so the same days can make you resident under both. A treaty between them, where one exists, allocates residence to one State for treaty purposes.
This guide is provided for general information purposes only and does not constitute financial, tax or legal advice. Rules and thresholds are those read on official sources in October 2026 and may change; the worked example is an illustration, and outcomes depend on individual circumstances.
