UK and Polish Tax Residence After Moving to Poland

This guide is general legal information, not legal advice. How the rules apply depends on your individual circumstances, contracts, documents and deadlines. If you need advice or representation, the matter should be assessed by a qualified Polish lawyer. Twoja Sprawa helps you organise the documents for that assessment.

Moving from the UK to Poland doesn't end once the boxes are unpacked. A separate — and often underestimated — question is where you are tax resident in a given tax year: the UK, Poland, or, on paper, both at once. That determines which country has the right to tax your worldwide income, and which one taxes only what you earn on its own territory. This guide walks through the mechanics of changing tax residence step by step, without going into detailed tax calculations — those need an individual review by a tax adviser.

Key points

Who this guide is for

Contents

Why tax residence is separate from immigration status and citizenship

It's worth separating three things people often conflate: citizenship, right of residence, and tax residence. Holding Polish citizenship does not automatically make you a Polish tax resident if you actually live and work in the UK. Equally, lawful residence in Poland (for example on a residence card) doesn't by itself decide tax residence, though in practice the two usually go together. Tax residence is governed by its own statutory tests in each country: in Poland by the Personal Income Tax Act (ustawa o PIT), in the UK by the Statutory Residence Test. These are two independent systems that need to be checked separately for each tax year — and Poland's tax year runs on the calendar year, while the UK's runs 6 April to 5 April, which alone complicates the analysis of a move-year.

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Buying property in Poland — a flat, a house, or land — does not by itself change your tax residence and is not grounds for a right of residence either. These are separate legal regimes, covered in more detail in our guide to getting a Polish mortgage using UK income.

Ośrodek interesów życiowych — the Polish "centre of vital interests" test — has no single-phrase English equivalent; think of it as roughly analogous to the "centre of vital interests" limb used in UK double-tax treaties, but defined and applied under Polish domestic law.

The Polish residence test: 183 days or centre of vital interests

Under Article 3 of the Polish PIT Act, a person is treated as having their place of residence in Poland (i.e. being a Polish tax resident) if they meet at least one of two conditions:

  1. they have their centre of personal or economic interests (centre of vital interests) in Poland, or
  2. they stay in Poland for more than 183 days in the tax year.

This "either/or" structure matters in practice: even if you spend fewer than 183 days in Poland in a given year, you can still be treated as a Polish tax resident if Poland is genuinely the centre of your life — family, home, main source of income. Conversely, exceeding 183 days of physical presence in Poland is on its own sufficient to trigger residence, regardless of where your "centre of life" actually is.

A person with a place of residence in Poland is subject to unlimited tax liability — taxed on their worldwide income, regardless of where it was earned (for example, salary from a UK employer, or UK investment income). A person without a place of residence in Poland is subject to limited tax liability — taxed only on income sourced in Poland, which the Act expressly includes income from Polish-located real property, including its sale.

The "centre of vital interests" test is applied case by case in practice and takes into account, among other things, where your family lives, your professional activity, and your social, political, cultural, civic and financial ties.

The Statutory Residence Test in the UK — the outline

On the UK side, tax residence is determined by the Statutory Residence Test (SRT), a statutory test that broadly considers two elements: the number of days spent in the UK in the tax year, and your connecting factors ("ties") with the UK — such as family in the UK, available accommodation, work, and days spent in the UK in previous years. The more ties you have, the fewer days in the UK are needed to be treated as resident.

⚠️ The precise day thresholds, the definitions of each tie, and the mechanics of the test (the automatic overseas test, the automatic UK test, the sufficient ties test) are set out in detail in HMRC's official guidance (RDR3) and need to be checked directly on gov.uk or with a UK tax adviser before being applied to a specific year of departure — this guide deliberately does not quote day thresholds without that up-to-date verification.

The key practical consequence: simply leaving Poland years ago and settling in the UK does not mean you automatically "stop" being UK resident on the day you fly to Poland — nor does the reverse move automatically end your UK residence on the day of departure. The SRT assesses the whole tax year (and, under the sufficient ties test, sometimes previous years too), so a move partway through the year needs its own analysis — see split year treatment below.

Dual residence and the PL-UK treaty tie-breaker

Because the Polish and UK residence tests are independent of each other, it's possible for both countries to treat you as their tax resident in the same tax year — for example because you spent over 183 days in Poland, but formally retained strong UK ties. For that situation, the 2006 double taxation convention between the United Kingdom and Poland (as modified by the MLI) contains a hierarchical conflict rule — the tie-breaker — in Article 4. The tests apply in order, stopping as soon as one gives a clear answer:

  1. permanent home — in which country you have a home available to you on a permanent basis;
  2. centre of vital interests — if you have a permanent home in both countries, this decides which country you have closer personal and economic ties with;
  3. habitual abode — if the centre of vital interests cannot be determined clearly;
  4. nationality — if you have a habitual abode in both countries or in neither;
  5. mutual agreement procedure between the two tax authorities — as a last resort, where even nationality doesn't settle it (for example, dual nationality).

The residence determined by the tie-breaker decides which state has the primary right to tax your worldwide income as resident, and which one then treats you as a non-resident (taxing only Poland-sourced or UK-sourced income — for example, rental income from a Polish flat). ⚠️ The exact scope of the MLI's modifications to the 2006 PL-UK convention as it relates to income from immovable property and the tie-breaker itself needs checking against the synthesised text of the treaty on gov.uk — different articles may have been modified to different extents.

Split year treatment — the year of departure split in two

The year in which you actually relocate is inherently the most complicated, because part of it is spent in the UK and part in Poland. The standard SRT looks at the whole tax year as a unit, which could mean that even after moving to Poland halfway through the year, the entire year is treated as UK resident (and, symmetrically, treated as Polish non-resident under the Polish rules).

Split year treatment is a mechanism in UK tax law that — provided you meet one of the statutory "cases" — lets you split the UK tax year into a resident part and a non-resident part, instead of being taxed as a full-year resident. One of those cases involves ceasing to have a home in the UK in connection with moving abroad; other cases relate to, for example, starting full-time work overseas. Each case has its own detailed conditions set out in HMRC's guidance (RDR3).

⚠️ Split year treatment is not automatic — you have to demonstrate that you meet a specific case and apply it correctly in your Self Assessment return for the year of departure; getting the classification wrong can lead to a dispute with HMRC. This part strongly warrants review by a UK tax adviser, particularly with an unusual departure date, remote work, or a UK property you keep.

Polish PIT law does not have a direct equivalent of a "split year" construction — Polish residence is assessed on an ongoing basis, based on when your centre of vital interests actually shifted to Poland or when you crossed 183 days of presence in a given tax year. In practice, this means that in the year you move, you could be, say, UK non-resident from date X (thanks to split year treatment) and Polish resident from the same or a nearby date — but that requires separately analysing both systems, not simply mapping one onto the other.

P85 and closing your record with HMRC

Someone leaving the UK permanently, or going abroad to work for a full tax year, should notify HMRC using form/procedure P85 ("Get your Income Tax right if you're leaving the UK"). P85 allows HMRC to:

P85 is not required if you're filing a full annual Self Assessment return for the year of departure anyway — in that case, your residence status (including any split year claim) is reported directly in that return.

If you keep and let out a property in the UK after moving to Poland, a separate mechanism applies — the Non-resident Landlords Scheme (NRLS): broadly, a letting agent or tenant (above a certain weekly rent threshold) must withhold tax at source from the rent, unless you obtain HMRC approval (form NRL1) to receive the rent gross. This concerns property in the UK, not Poland — the mirror-image topic on the Polish side (letting a Polish flat while you live in the UK) is covered in our guide on renting out property in Poland while living in the UK.

Common scenarios

Mid-year move, remote work continuing for a UK employer. You relocate to Poland, say, in September but keep working remotely for the same UK employer. You need to check whether you meet split year conditions in the UK for the year of departure; from what date Polish tax residence arises (the centre of vital interests can shift the day your family relocates, regardless of who employs you); and whether your UK employer has any tax or social-security obligations in Poland because the employee is now physically working from Polish territory.

The whole family relocates permanently, UK home sold before the move. This is the most straightforward case to analyse: it potentially meets the "ceasing to have a UK home" split year case, and the Polish centre-of-interests test points clearly one way too — family, children in Polish school, main home unambiguously in Poland from the date of the move.

One spouse stays in the UK, the other relocates to Poland with the children. Here the centre of vital interests can be genuinely contested — you have family and a home in both countries. This is where the PL-UK treaty tie-breaker (particularly "permanent home" and "centre of vital interests") becomes decisive, and the outcome depends heavily on the specific facts.

Repeated short "trial" stays in Poland before a permanent move. Short, repeated stays make it harder to establish residence on day count alone — the UK's ties and Poland's centre-of-interests test may end up more decisive than a simple day count.

Documents you will need

Common risks and mistakes

  1. Treating Polish citizenship as equivalent to Polish tax residence. These are two separate concepts — citizenship does not decide residence.
  2. Assuming that buying a flat in Poland automatically "switches" tax residence. It doesn't — what matters is your actual place of residence and centre of interests, not owning property.
  3. Ignoring the SRT in the UK after leaving. Many people assume that "since I no longer live in the UK" they are automatically non-resident — the SRT requires a formal assessment, especially with strong remaining UK ties (home, family, work).
  4. Missing the P85 filing, or getting the Self Assessment for the year of departure wrong, which can lead to a dispute over a tax refund or an incorrect residence status in HMRC's systems.
  5. Assuming the PL-UK tie-breaker resolves things automatically, without documentation. In practice it requires evidencing specific facts (where your "permanent home" is, where your "centre of life" is) — without that evidence, a dispute with either country's tax authority is a real risk.
  6. Failing to declare rental income from a property left behind in the other country (a flat in Poland after moving to the UK, or a house in the UK after moving to Poland) — both countries have their own mandatory mechanisms here (flat-rate rental tax in Poland, the Non-resident Landlords Scheme in the UK).

Checklist

Frequently asked questions

Do I get to choose which country I'm tax resident in? No — residence isn't a matter of choice. It's decided by each country's own statutory tests (Article 3 of the Polish PIT Act, the UK's Statutory Residence Test). If both countries treat you as resident at once, the PL-UK treaty tie-breaker — not your preference — decides priority.

Does working remotely for a UK employer from Poland change my tax residence? The form of employment isn't itself a residence test — what matters is where you actually live and your centre of vital interests. Remote work from Poland can, however, raise separate issues for your employer (a permanent establishment question) and for social security contributions — that needs its own review by a tax adviser.

If I spend exactly 183 days in Poland, am I already resident? The Polish rule refers to staying "more than 183 days", so exact day-counting matters and is worth documenting. You could also become resident earlier regardless of day count, if you meet the centre-of-vital-interests test.

What happens if I forget to notify HMRC via P85 when I leave? HMRC may continue to treat you as resident in its systems, which can lead to an incorrect tax calculation or a later correction — unless you report the correct status through a full Self Assessment return instead.

Can I be permanently tax resident in both countries at once? Formally yes, under each country's own domestic rules, but the PL-UK treaty's tie-breaker determines a single "treaty residence" for applying the treaty itself. That doesn't automatically remove every reporting obligation in the other country.

Does buying a flat in Poland purely as an investment affect my residence? No — what matters is your actual place of living and centre of vital interests, not owning an asset. Polish property could, however, be one factor considered under the "permanent home" limb of the tie-breaker test if a dual-residence dispute ever arose.

Does split year treatment apply automatically in the year I move? No — you have to demonstrate that you meet one of the statutory "cases" and apply it correctly in your return. This requires review by a UK tax adviser, especially where the circumstances are unusual.

Deadlines

This topic doesn't have a single "limitation period" in the classic sense, but it does involve several important procedural dates: the UK tax year runs from 6 April to 5 April, and Self Assessment returns (including any split year claim) are normally due by 31 January following the end of the tax year. In Poland, the tax year matches the calendar year, and the standard deadline for the annual PIT return is 30 April of the following year. These deadlines relate to filing itself — establishing residence, by contrast, is an ongoing assessment of the facts, not a one-off act with its own limitation period..

If your move also involves buying or selling property in Poland, it's worth understanding the paperwork that follows the transaction — see our guide on what to do after buying property in Poland: registration, taxes, utilities and insurance. If you're returning to Poland and want to get the administrative side sorted after arrival, see returning to Poland from the UK: a legal checklist for Polish citizens.

If you're financing a Polish property purchase with UK income, that's a separate question — tax residence status is not the same thing as mortgage affordability or the currency of your income — see our guide on getting a Polish mortgage using UK income.

Tax residence questions around a UK-to-Poland move can get complicated, especially in the year of the move itself and where you hold income or assets on both sides of the Channel — if you'd like help organising your documents before talking to a tax adviser, you can request a free initial assessment.

Related guides

Przeczytaj po polsku: Rezydencja podatkowa w Wielkiej Brytanii i Polsce po przeprowadzce

Sources

Information verified on: 11 July 2026.

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