Tax Residency and the 183-Day Rule: How Countries Decide Where You Pay Tax

Tax residency is not a residence permit

A residence permit or a passport decides where you may live. Tax residency decides where you are taxed as a resident, and each country sets it in its own tax law. The two often coincide, but they do not have to: you can hold a permit in one country and still be tax resident in another.

Citizenship is a separate question again. Most countries tax by residence, but the United States taxes its citizens on their worldwide income wherever they live (HMRC, as of November 2026).

The 183-day rule, country by country

Countries that use a day count apply it differently: the period counted, how days of travel are treated and the tests that sit beside it all vary.

Sources: BOE, Personal Income Tax Law, article 9; HMRC; IRS; Cyprus Tax Department; Belastingdienst; all as of November 2026.

In Cyprus, the day of arrival counts as a day in Cyprus and the day of departure as a day outside it (Tax Department, as of November 2026). For Dutch income tax, you live in the Netherlands if you have a lasting bond of a personal nature with the country, and that bond does not have to be stronger than your bond with another country (Belastingdienst, as of November 2026).

Staying under 183 days is not enough

Spending fewer than 183 days in a country does not by itself make you non-resident there. In Spain, the centre of your economic interests is a test of its own, and the family presumption applies whatever the day count. In the UK, the only-home and work tests can make you resident with fewer days.

The day count also says nothing about the country you left. Your former country of residence applies its own rules to decide when your residence there ends, so leaving properly is a step of its own, not the automatic result of arriving somewhere else.

When two countries both claim you

You can be resident under the domestic law of two countries in the same year. A tax treaty between them then decides which one counts as your country of residence for the treaty. HMRC describes the usual tie-breaker tests, applied in this order until one gives an answer (HMRC, as of November 2026):

1. Permanent home: accommodation that is always available for your personal use; you do not have to own it.
2. Centre of vital interests: the country where your social, domestic, political and cultural links are greater.
3. Habitual abode: the country where you live regularly, normally or customarily.
4. Nationality: generally, the country of which you are a national.

Each treaty has its own wording, so read the residence article of the treaty that applies to you.

Companies have a tax residency too

For companies, the tests are incorporation and management. Spain treats an entity as resident if it was formed under Spanish law, has its registered office in Spain or is effectively managed there (BOE, Corporate Income Tax Law, article 8, as of November 2026). Moving a company's registration does not by itself move its tax residence; our guide to company redomiciliation explains why.

What banks ask, and how to prove it

Under the Common Reporting Standard, a bank must record the tax residence of each client, and new clients give a self-certification of where they are tax resident (Belastingdienst, as of November 2026). The bank reports the account to that country if it takes part in the standard, so the answer has to be right. Our explainer on the Common Reporting Standard covers what is reported.

When a foreign tax authority, a payer or a bank needs proof, the usual document is a tax residence certificate from your own tax authority. If you are planning a move, our Global Structuring desk coordinates residency, company and banking with licensed tax advisers in each country.

Frequently asked questions

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

No. Spain and Cyprus count more than 183 days in the year, the UK counts 183 days or more in its tax year, and the US weighs days over three years. The Netherlands has no fixed day count at all.

Does a residence permit make me tax resident?

Not by itself. Tax residency follows each country's tax law, which looks at days, homes, family and economic ties. A permit can support those facts, but it does not replace them.

Can I be tax resident in two countries at once?

Yes, under the domestic law of both. Where a tax treaty applies, its tie-breaker tests decide which country counts as your residence for the treaty: permanent home, centre of vital interests, habitual abode and nationality.

Can I avoid tax residency everywhere by moving often?

It is fragile. Your former country may still treat you as resident, banks ask every client for a tax residence under the Common Reporting Standard, and without a certificate you cannot claim treaty benefits.

How do I prove my tax residency?

With a tax residence certificate from the tax authority of the country where you are resident, usually issued for a specific tax treaty and year.

Sources

• HMRC (UK): Tax on foreign income: residence (as of 3 November 2026)
• HMRC (UK): Dual residents, helpsheet HS302 (as of 3 November 2026)
• IRS (United States): Substantial presence test (as of 3 November 2026)
• BOE (Spain): Law 35/2006 on Personal Income Tax, article 9 (as of 3 November 2026)
• BOE (Spain): Law 27/2014 on Corporate Income Tax, article 8 (as of 3 November 2026)
• Tax Department (Cyprus): Tax residency and domicile (as of 3 November 2026)
• Belastingdienst (Netherlands): Which rules determine the tax country of residence under the CRS (as of 3 November 2026)
• Belastingdienst (Netherlands): How the tax country of residence is determined under the CRS (as of 3 November 2026)
• Belastingdienst (Netherlands): Handout for the webinar on foreign income in the income tax return, 16 January 2025 (as of 3 November 2026)

This article is general information, not tax advice. Residence rules depend on your full circumstances and on the treaties between the countries involved; take advice from a qualified tax adviser in each country before you rely on them.