Life Event · Relocation

Moving Abroad from the UK

UK expatriation involves complex tax, pension, NI and asset planning. This guide covers the key financial steps before, during and after leaving the UK.

Last updated: 24 May 2026Last reviewed: 24 May 2026How we verify

UK Tax Residency — the SRT

UK tax residency determined by Statutory Residence Test (SRT):

Automatically non-resident if <16 days in UK (or <46 if not resident previous 3 years)
Automatically resident if 183+ days, only home in UK, full-time work in UK
Sufficient ties test for everyone else — ties (family, accommodation, work, 90-day, country) determine threshold

Tax year is split-year possible if you leave/arrive mid-year. Notify HMRC via form P85 («Leaving the UK»).

The SRT in Detail — Three Stages

The Statutory Residence Test introduced in April 2013 replaced an opaque case-law system with a structured 3-stage test. Apply each stage in order, stopping at the first one that gives a definitive answer:

Stage 1 — Automatic Overseas Tests: non-resident if you spent <16 days in UK (or <46 days if not UK-resident in any of the previous 3 tax years), OR worked full-time abroad with <91 UK days and <31 work-days in UK.
Stage 2 — Automatic UK Tests: resident if 183+ days in UK, OR only home is in UK, OR full-time UK work over a 365-day period.
Stage 3 — Sufficient Ties Test: for everyone in between. Combines days spent in UK with "ties" — family tie (spouse/minor children UK-resident), accommodation tie (UK home available 91+ days), work tie (40+ work-days in UK), 90-day tie (90+ UK days in either of last 2 years), country tie (more days in UK than any other country, for leavers only).

Tracking days is critical: HMRC's default rule counts a day if you are in UK at midnight. The "deeming rule" can add transit days for frequent travellers with substantial UK ties. Use a tracking app (Tax Days Tracker, FBC Manby Bowdler templates) — HMRC has won several recent cases against expats who self-reported optimistic day counts.

Split-Year Treatment — Case 1 Most Common

By default, UK tax residency is determined for the whole tax year (6 April-5 April). Split-year treatment lets you split the year into a UK-resident part and a non-resident part for income tax purposes. There are eight specific Cases (1-8) that can apply — you must meet the conditions of one exactly:

Case 1: Starting full-time work overseas (the most common case for departing expats)
Case 2: Partner of someone starting full-time work overseas
Case 3: Ceasing to have a home in the UK
Cases 4-8: Various arrival scenarios (starting UK work, acquiring UK home, etc.)

Case 1 requires: full-time overseas work for at least 12 months including a full tax year, no more than 31 UK work-days in the overseas part, no more than 91 UK days in the overseas part. If you qualify, your UK tax liability ends from the date your full-time overseas work begins. CGT split-year rules differ slightly — gains realised in the overseas part are generally outside UK CGT scope unless caught by the 5-year temporary non-residence rule.

Before You Leave

Submit form P85 to HMRC to claim any tax refund and notify of departure
File final Self Assessment if required
Notify Student Loans Company — repayment switches to «overseas income assessment»
Check tax treaty with destination country (UK has DTAs with 140+ countries)
Consider crystallising UK CGT positions while still UK-resident (temporary non-residence rules may catch large gains)
Maintain UK NI record (Class 3 voluntary £17.45/wk = full-year for £908)
Inform mortgage lender, bank, pension providers
Forward mail (Royal Mail redirection or scan service)

UK Tax While Abroad

UK-source rental income: stays UK-taxable. Register for Non-Resident Landlord Scheme to receive rent without tax withholding
UK pension income: generally UK-taxable but treaty may give relief
State Pension: paid worldwide, but only «frozen» (no annual increases) in some countries (Canada, Australia, most Caribbean)
UK property gains: all non-residents pay UK CGT on UK property since 2015
UK shares/funds: generally no CGT for non-residents (but check 5-year temporary non-residence rule)
Inheritance tax: based on DOMICILE, not residence. UK domicile «sticky» — takes 4 tax years to lose

UK Property — Non-Resident Landlord Scheme

If you keep a UK rental property while non-resident, the Non-Resident Landlord (NRL) scheme requires your letting agent (or tenant directly if no agent) to withhold 20% basic-rate tax from rent and pay it to HMRC quarterly. The default 20% withholding is generally too much for most landlords once mortgage interest restriction, allowable expenses and Personal Allowance are factored in.

Apply via form NRL1 (individuals), NRL2 (companies) or NRL3 (trusts) for approval to receive rent gross. Once approved, you file annual Self Assessment instead. UK rental income remains UK-taxable under all UK double-tax treaties, but most treaties allow credit relief in your country of residence for the UK tax paid. Sale of UK residential property by non-residents has triggered UK CGT since April 2015, with a 60-day reporting and payment deadline from completion.

ISAs & Pensions Abroad

ISAs: existing ISAs keep tax-free status in UK but most destination countries DO tax the returns. Cannot add new money once non-resident.
SIPPs / Workplace pensions: can continue contributing up to £3,600 gross/year for 5 tax years after leaving UK. Withdrawals subject to destination country tax under treaty.
State Pension: continue accruing voluntary Class 3 NI — extremely good value (each £908 voluntary contribution adds ~£329/year for life)

Class 3 Voluntary NI — Best Pension Deal Available

Class 3 voluntary NI for 2025/26 costs £17.45/week — £907.40 for a full year (52 weeks). Each qualifying year adds approximately £329/year to your State Pension at age 67 (1/35 of the full new State Pension rate of £11,502.40/year). Payback time is under 3 years of pension receipt — by UK life expectancy you collect 15-20 years, meaning a multiple of 5-7x your contribution back in real terms.

You can buy Class 3 in respect of any tax year up to 6 years back (or until 5 April 2025, all years from 2006/07 onwards under the special amnesty extended to April 2025). Class 2 voluntary NI (£3.45/wk) is even better value but only available if you are self-employed abroad; HMRC has tightened the eligibility test. Check your forecast at gov.uk/check-state-pension before paying — if you already have 35 qualifying years, additional contributions add nothing.

FATCA — Complications for US Citizens

The US is one of only two countries (alongside Eritrea) that taxes its citizens on worldwide income regardless of residence. US citizens or Green Card holders leaving the UK do not escape US filing obligations — they must continue filing IRS Form 1040 annually, with FBAR (FinCEN 114) reporting any non-US bank accounts above $10,000, and Form 8938 for higher thresholds.

Specific complications: UK ISAs are treated as taxable PFICs by the IRS with punitive reporting and tax; UK pensions may or may not qualify for the US-UK treaty deferral depending on type; UK life insurance bonds trigger annual deemed-distribution rules. The Foreign Tax Credit and Foreign Earned Income Exclusion ($120,000 for 2024) generally avoid double taxation on earned income but not on investment income. US-UK dual nationals leaving the UK should engage a US-UK cross-border tax adviser BEFORE making any major financial moves.

Common Mistakes

Not filing P85 — HMRC may continue to consider you UK-resident
Not maintaining NI record — gaps reduce State Pension
Withdrawing UK pension before understanding destination tax
Triggering temporary non-residence rules by returning within 5 years
Selling UK property without filing 60-day CGT return as non-resident
Forgetting about UK Inheritance Tax (domicile, not residence)

Common Mistakes to Avoid

Failing to file P85. Without it, HMRC continues to expect Self Assessment returns and may not recognise non-residence — creating multi-year tax disputes.
Returning to UK within 5 years. The temporary non-residence rule recaptures CGT and certain dividend income earned during the overseas period if you become UK-resident again within 5 tax years.
Missing the 60-day CGT return on UK property sale. Non-residents must report and pay CGT within 60 days of completion of any UK residential property sale — penalties from day 61.
Not maintaining Class 3 voluntary NI. Each year skipped costs roughly £329/year of State Pension for life — the single best pension deal available to expats.
Confusing residence with domicile for IHT. UK IHT is based on domicile (deemed domicile after 15 of last 20 tax years UK-resident, or formally domiciled in UK) — not on tax residence. UK assets remain in scope regardless.

Frequently Asked Questions

How does the UK Statutory Residence Test work?

The SRT is a 3-stage test. Stage 1 — Automatic Overseas Tests: you are non-resident if you spent <16 days in UK (or <46 if not UK-resident in the prior 3 tax years), or worked full-time overseas with <91 UK days. Stage 2 — Automatic UK Tests: resident if 183+ days, or only home in UK, or full-time work in UK. Stage 3 — Sufficient Ties Test: combines days in UK with ties (family, accommodation, work, 90-day, country). The more ties, the fewer days trigger UK residency. Each tax year (6 April-5 April) is tested separately.

What is split-year treatment?

Split-year treatment lets you split a tax year of departure or arrival so you are only UK-resident for part of it. There are 8 Cases (1-8); Case 1 (leaving for full-time work abroad) is the most common for expats. Conditions: full-time work in the new country for at least 12 months including a full tax year, with limited UK return days. If you qualify, your UK tax liability ends from the date your full-time overseas work begins — you do not need to wait until 5 April to break UK residence.

Should I keep paying UK National Insurance as Class 3 voluntary?

Almost always yes if you have fewer than 35 qualifying years for the new State Pension. Class 3 voluntary NI costs £17.45/week (£907.40 for a full 2025/26 year) and buys one qualifying year. Each year adds approximately £329 of annual State Pension for life (1/35 of the full £11,502.40/year rate). Payback time: under 3 years of pension receipt — extraordinary value for anyone in good health expecting to live past 70.

Do I need to file form P85?

Yes if you are leaving the UK for at least a full tax year. Form P85 ("Leaving the UK — getting your tax right") notifies HMRC, claims any tax refund for the year of departure, and triggers consideration of split-year treatment. Submit via your Personal Tax Account at gov.uk or by post. Without P85, HMRC may continue treating you as UK-resident and chasing returns for years.

How does the Non-Resident Landlord (NRL) scheme work?

If you receive UK rental income while non-UK-resident, your letting agent or tenant must by default withhold 20% basic-rate tax and pay it to HMRC quarterly. You can apply via form NRL1 (individuals) for approval to receive rent gross, then file annual Self Assessment yourself. UK rental income remains UK-taxable regardless of residence — the UK retains primary taxing rights over UK-source property income in all UK double-tax treaties.

Do UK Double Tax Agreements stop double taxation?

The UK has Double Tax Agreements with around 140 countries. They allocate taxing rights and provide relief via either exemption (income only taxed in one country) or credit (tax paid in source country offset against destination country tax). For UK pensions, treaties typically give the residence country (where you now live) the taxing right. For UK property, the UK retains taxing rights. Always check the specific treaty article for each income type at gov.uk/government/collections/tax-treaties.

Can I keep my ISA while living abroad?

Yes. Existing ISAs retain their UK tax-free status indefinitely even while you are non-UK-resident. But — you cannot add new contributions to any ISA while non-resident. Most destination countries (US, Canada, Australia, most EU) do not recognise ISAs and will tax the returns under their own rules — the US in particular treats UK Stocks & Shares ISAs as taxable PFICs with punitive reporting. Check destination tax treatment before deciding to keep an ISA active.

What is QROPS for pension transfers abroad?

A Qualifying Recognised Overseas Pension Scheme is an overseas pension HMRC has approved to receive UK pension transfers. Transfers from UK schemes to non-QROPS overseas pensions trigger an unauthorised payment charge of 55% plus penalties. From March 2017, transfers to QROPS outside the EEA also trigger a 25% Overseas Transfer Charge unless you are resident in the same country as the QROPS or the receiving scheme is a recognised pension scheme of your employer. The post-Brexit landscape is increasingly restrictive — take cross-border pension advice before any transfer.

References

CGT

Non-resident UK property CGT

Pension

Voluntary contributions abroad

Calculators for this topic

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Disclaimer: Expatriation tax is genuinely complex. Always use a cross-border tax specialist before significant moves.

About the author

Emma Clarke

UK Tax Writer

Emma Clarke has been writing about UK personal tax since 2018, with a particular focus on Self Assessment, PAYE coding and the practical mechanics of how HMRC actually applies the rules to ordinary salaries. Her work concentrates on translating the dense language of HMRC manuals and Finance Act schedules into worked examples that show, pound by pound, how income tax and National Insurance reduce a gross salary to the figure that lands in a UK bank account. Emma covers the full PAYE lifecycle: tax codes (1257L, BR, K codes, emergency codes), the Marriage Allowance, the High Income Child Benefit Charge, salary sacrifice arrangements and their effect on pensionable pay, the Apprenticeship Levy, and the differences between the rUK and Scottish income-tax regimes. She is particularly interested in the edge cases that catch PAYE employees out — the £100,000 personal-allowance taper, the 60% effective marginal rate it creates, and the interaction between student-loan plans and pension contributions. Every figure in Emma's articles is verified against the current HMRC rates pages and worked through a Self Assessment calculation by hand before publication. She writes to CalcHub's editorial standards: primary-source citations, plain English, no promotional language, and clear "this is general information, not financial advice" disclaimers where appropriate.

Personal-finance writer since 2018
UK tax specialism — PAYE, Self Assessment, National Insurance
Writes to CalcHub editorial standards (primary-source citation, annual review)

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