Moving Abroad from the UK: Tax and Residency Traps to Avoid in 2025/26

UK Tax Residency Moving Abroad 2025/26: Key Summary

Leaving the UK is far more than booking a one-way flight and forwarding your post. HMRC has a strict Statutory Residence Test, unforgiving rules on Capital Gains Tax and Inheritance Tax, and a newly reformed regime replacing the old non-dom system in 2025/26. This guide walks you through the pitfalls that catch people out and how to plan a clean break, with our Moving Abroad UK Tax & Residency Engine · SRT 25/26 helping you run the numbers.

Why Moving Abroad Is a Tax Event, Not Just a Life Event

When you emigrate, you are not simply leaving a country. You are changing your entire tax profile. UK residents pay tax on worldwide income and gains. Non-residents generally only pay UK tax on UK-sourced income, like rental profits or certain pensions.

The problem is that residency is not something you choose. HMRC decides, using the Statutory Residence Test (SRT). Get this wrong and you could easily face tax bills in two countries, penalties of £100 or more per late filing, and interest charges that quietly compound month after month. For someone with a modest investment portfolio, a mistimed sale can trigger a five-figure UK CGT bill that could otherwise have been avoided entirely.

The 2025/26 tax year matters more than most. The long-standing "non-dom" remittance basis has been abolished and replaced with a residence-based regime from 6 April 2025. That change affects arrivers, leavers, and returners alike. Anyone planning a move in this window needs to understand the new landscape before packing a single box, and ideally before selling any assets or drawing any pensions.

If you are juggling other big financial decisions this year, our guides on company car versus cash allowance and pension carry forward may also be useful reads.

UK Statutory Residence Test Explained for 2025/26 Expats

The SRT has three parts, applied in order. You work through them sequentially and stop at the first one that gives a definitive answer.

The Automatic Overseas Tests

These are the tests that can conclusively make you non-resident. You are automatically non-resident if you meet any one of the following:

• You were UK resident in one or more of the previous three tax years and spend fewer than 16 days in the UK in the current tax year.
• You were non-resident in all of the previous three tax years and spend fewer than 46 days in the UK in the current tax year.
• You work full-time overseas (broadly, an average of 35 hours per week) with no significant breaks, and spend fewer than 91 days in the UK, with no more than 30 of those being workdays.

The full-time work overseas test is the route most emigrants rely on. But "full-time" and "significant breaks" have precise definitions. A long holiday back in Britain, an unpaid sabbatical, or a redundancy could break the test and drag you back into UK residency.

The Automatic UK Tests

These make you automatically UK resident. You will be UK resident if:

• You spend 183 days or more in the UK in the tax year.
• Your only home is in the UK for at least 91 consecutive days.
• You work full-time in the UK for 365 days or more, with the period spanning the tax year.

The Sufficient Ties Test

If neither of the automatic tests gives a clear answer, the sufficient ties test applies. HMRC counts your "ties" to the UK against your days spent in the country. The ties include:

1. A UK-resident spouse, civil partner, or minor child.
2. Accommodation in the UK that is available to you and used at least one night.
3. Substantive UK work (40 or more workdays in the year).
4. More than 90 days spent in the UK in either of the previous two tax years.
5. More time in the UK than in any other single country (the "country tie", applies to leavers only).

The more ties you have, the fewer days you can spend in the UK before becoming resident. A "leaver" with four ties, for instance, becomes resident after just 45 days.

Split-Year Treatment for UK Tax Residency Moving Abroad 2025/26

Ordinarily, you are either UK resident for a whole tax year or not at all. Split-year treatment can carve the year into a resident part and a non-resident part, but only if you meet one of eight specific "cases".

The most common cases for leavers are Case 1 (starting full-time work overseas), Case 2 (accompanying a partner who is starting full-time work overseas), and Case 3 (ceasing to have a home in the UK). Each case has strict conditions. For Case 3, for example, you must have no UK home for the rest of the tax year, spend fewer than 16 days in the UK, and become tax resident in another country within six months.

Missing one condition means the whole tax year stays taxable in the UK. Consider Sarah from Bristol, who sold her flat in October 2025, moved to Dubai to work in tech, but flew back for three weeks over Christmas to help her parents move house. Those extra days pushed her over the 16-day Case 3 limit. The result: her Dubai salary of around £95,000 for the remainder of the tax year became fully taxable in the UK, costing her roughly £28,000 in additional tax that a two-week Christmas visit would have avoided.

UK Capital Gains Tax for Expats Moving Abroad in 2025/26

Selling assets around the time of a move is one of the most common ways emigrants get caught out. There is a widespread belief that becoming non-resident lets you sell UK investments free of Capital Gains Tax. The reality is more nuanced.

Temporary Non-Residence Rules

If you leave the UK, become non-resident, sell assets, and then return within five full tax years, the gains on assets you owned before leaving can be pulled back into UK tax when you return. This is the "temporary non-residence" rule, and it exists specifically to stop people taking short tax-motivated breaks abroad.

To fully escape this trap, you need to remain non-resident for more than five years. The clock is strict, and returning even a few weeks too early can trigger a full retrospective assessment.

If you want to estimate your potential CGT liability before and after your move, try our UK Capital Gains Tax Calculator.

UK Property Is Always in the Net

Even if you achieve permanent non-residence, gains on UK residential and commercial property remain within the UK CGT net. Non-resident CGT returns must be filed within 60 days of completion. Missing this deadline attracts automatic penalties, starting at £100 and rising quickly, even if no tax is due.

Rebasing and Timing

For assets that will escape UK CGT once you are non-resident, timing your disposals matters. Selling before you leave means UK CGT applies. Selling after becoming non-resident, and staying non-resident long enough, can mean no UK CGT at all, though your new country may tax the same gain.

UK Inheritance Tax for Expats: Residence-Based Rules from 2025/26

For decades, Inheritance Tax (IHT) hinged on domicile, a common-law concept that is much harder to shed than residency. From 6 April 2025, this changed. The UK moved to a residence-based IHT system as part of the wider non-dom reforms.

Under the new regime, a person who has been UK resident for at least 10 of the last 20 tax years becomes a "long-term resident" and is within the scope of UK IHT on their worldwide estate. Even after leaving the UK, this status persists for a "tail" period of between three and ten years, depending on how long you were resident.

In practical terms, someone who lived in the UK for 15 years and then emigrates could still face UK IHT on their global estate for several years after leaving. Non-UK assets settled into trusts before the changes may still enjoy some protection, but the rules are complex and were tightened in 2025. UK-situated assets such as property and UK shares held directly remain within UK IHT regardless of your residency.

Wills and cross-border estates. A UK will may not be valid or effective in your new country. Some countries have forced heirship rules that override English-style testamentary freedom. Others require a local will for local assets. Making a fresh will in your new country of residence, drafted to work alongside your UK will rather than revoke it, is often the safest approach. Speak to a solicitor qualified in both jurisdictions.

If you want to estimate your estate's exposure, use our UK Inheritance Tax Tool.

Pensions, ISAs and Investment Accounts for UK Expats

Emigration affects almost every wrapper you hold, and the differences between them matter.

UK pensions. You can still contribute to a UK personal pension after leaving, but tax relief is limited. For up to five tax years after departure, you can contribute up to £3,600 gross per year and still receive basic-rate tax relief, even with no UK earnings. Drawing pension income as a non-resident depends heavily on the double taxation agreement between the UK and your new country. Some treaties give sole taxing rights to your country of residence, others allow both. Getting this wrong can lead to double taxation until you claim it back, a process that can take a year or more.

If you are still building up pension pots before leaving, our pension carry forward guide explains how to make the most of unused allowances.

ISAs. You cannot contribute to a UK ISA once you cease to be UK resident, with a narrow exception for Crown employees serving overseas. Existing ISAs retain their UK tax-free status, but almost no other country recognises this. Most jurisdictions will tax the income and gains inside your ISA as if it were an ordinary account.

Investment bonds and offshore funds. Non-reporting offshore funds can generate "offshore income gains" taxed as income rather than capital gains. Some products marketed to expats have very unfavourable UK tax treatment if you ever return.

Ongoing UK Income While Abroad: Landlords, Dividends, and Double Taxation

Many emigrants keep UK income sources: rental properties, dividends, freelance clients, or director's fees.

The Non-Resident Landlord Scheme. If you rent out UK property while non-resident, letting agents, or tenants paying more than £100 per week directly, must withhold basic-rate tax from the rent unless you register with HMRC's Non-Resident Landlord Scheme. This lets you receive rent gross and settle your tax through self-assessment.

Register for the Non-Resident Landlord Scheme to avoid unnecessary withholding and streamline your tax affairs.

UK dividends and interest. Non-residents generally pay no UK tax on UK dividends or bank interest, thanks to "disregarded income" rules. However, this comes at a cost: you lose your personal allowance for other UK income. The optimal treatment depends on your overall UK income mix, and it is worth modelling both scenarios.

Directors and freelancers. If you keep a UK limited company or continue to serve as a director, tax residency of the company, the director's location when duties are performed, and potential permanent establishment issues in your new country all come into play. This is one of the areas where professional advice pays for itself many times over.

For more on avoiding double taxation, see our UK Double Tax Agreement Guide.

Practical Steps Before You Leave: UK Tax Residency Moving Abroad 2025/26 Checklist

Here is a checklist to work through in the six to twelve months before departure. Most people can move through it in a couple of focused evenings, and the whole exercise saves an average client several thousand pounds in avoidable tax:

1. Confirm your expected residency status under the SRT for both the year of departure and the year after.
2. Check whether split-year treatment will apply and which case you are relying on.
3. Model the CGT position on any assets you might sell around the move.
4. Review pension contributions and consider using unused allowances before leaving.
5. Update your will and consider IHT implications under the new residence-based rules.
6. Notify HMRC of your departure using form P85 or via self-assessment.
7. Register for the Non-Resident Landlord Scheme if letting UK property.
8. Check the double taxation agreement between the UK and your destination.
9. Keep meticulous records of travel days, work days, and UK ties.
10. Get destination-country tax advice before you arrive, not after.

If part of your reason for moving is to get a fresh financial start, tackling any outstanding UK debt first makes sense. Our guide on debt payoff strategies walks through the options.

Common UK Tax Residency Mistakes When Moving Abroad

A few patterns come up again and again in HMRC disputes and expat forums:

• Selling a UK rental property in the tax year of departure without checking whether it still falls within CGT.
• Assuming a P85 filing "closes" your UK tax affairs when self-assessment is still required.
• Taking a large pension lump sum in the year of departure and being taxed on it as if resident.
• Returning to the UK for a family emergency and staying too long, breaking the full-time work overseas test.
• Keeping a UK "available home" without realising it counts as a residency tie.
• Failing to file non-resident CGT returns within 60 days on UK property sales.
• Ignoring the destination country's own reporting rules for foreign assets.

UK Tax Residency Moving Abroad 2025/26: Frequently Asked Questions

Readers often ask the same three questions when they start planning a move.

"Do I really need an accountant if my situation is simple?" If you have only UK employment income and a modest ISA, the day-count and P85 route can be handled yourself. Anyone with property, a limited company, share options, or a pension approaching drawdown should budget for professional advice. Fees of £500 to £1,500 for a proper exit review routinely save many times that.

"What if I change my mind and come back?" You can return at any time, but the temporary non-residence rules mean coming back within five full tax years can reopen gains you thought were settled. Plan as if you might return, not as if you never will.

"Will HMRC really check?" Yes. HMRC receives data from foreign tax authorities under the Common Reporting Standard, from UK letting agents, from Companies House, and from pension providers. Discrepancies are increasingly picked up automatically. Getting things right first time is far cheaper than defending an enquiry three years later.

UK Tax Residency Moving Abroad 2025/26: Conclusion

Moving abroad from the UK in 2025/26 is a genuine opportunity for a financial reset, but only if you handle the tax exit properly. The Statutory Residence Test, split-year rules, temporary non-residence provisions, and the new residence-based IHT regime all conspire to catch out the unwary. A single mistimed asset sale or an underestimated day-count can turn a well-planned move into an expensive one.

The good news is that most pitfalls are avoidable with careful planning and clear records. Model your day counts, understand your ties, keep documentation, and take advice from someone who understands both jurisdictions. Our Moving Abroad UK Tax & Residency Engine · SRT 25/26 is a solid starting point for running through the SRT and stress-testing your planned departure date. It takes about 15 minutes to work through and gives you a clear picture of where you stand.

Do the work upfront, and you can leave the UK on your own terms rather than HMRC's.

Sources

• HMRC RDR3: Statutory Residence Test guidance (gov.uk)
• HMRC: Tax on foreign income and residency (gov.uk)