Expat Tax Return UK: A Complete Guide for Non-Residents

Leaving the UK does not end your relationship with HMRC (His Majesty’s Revenue and Customs). Rent from a Manchester flat, a UK pension, or a property sold back home can still pull you into a UK tax return, even in a year you never set foot there.

A late return costs £100 from day one, even if you owe nothing – and they accelerate substantially.. These are the same the rules you learned as a resident:all of the obligations you might have been used to when living in the UK apply in exactly the same way after you have moved abroad. There is no separate regime or leniency.. This guide covers the expat tax return UK essentials: who files, what stays taxable, and which reliefs are worth claiming.

What Is Self Assessment in the UK?

Self Assessment is the system HMRC uses to collect Income Tax from people whose tax is not taken off before the money reaches them. If you are employed in the UK and paid through PAYE (Pay As You Earn), your employer deducts the tax from your salary and passes it to HMRC on your behalf, so nothing is left for you to declare, unless your income reaches certain levels. Self Assessment covers the income that withholdingdoesn’t touch, and it allows you to claim reliefs that withholding doesn’t cater for. Examples include:

Rental profits from letting out a property.
Earnings from self-employment or from a share in a partnership.
Foreign income, where the UK has the right to tax it.
Investment returns above the tax-free allowances, such as dividends and interest.
Capital gains, for example on the sale of a property or shares.
Pension contributions bearing tax relief
EIS, VCT, SEIS and Gift Aid contributions
Factoring in Student Loan repayments
Claiming Double Tax Treaty relief etc.

You declare your income and gains on a tax return and calculate the tax due, HMRC processes the submission and may or may not ask you questions about the submission – they have 12 months do to so. And you pay your tax by 31 January following the tax year end. . For an expat this is almost always how UK tax gets settled, because non-resident income typically sits outside PAYE.

Do Non-Residents Pay Tax in the UK?

Yes, but only on income and gains that arise in the UK or relate to duties of employment performed in the UK. A UK resident is taxed on worldwide income. A Non-Resident is taxed on the UK part alone, and everything else falls outside the UK charge.

The UK-sourced income that stays within the net is:

Rent from a UK property.
Profits from a trade carried on in the UK.
UK pension income.
Gains on UK land or property
Earnings relating to a employment, part of the duties of which are performed in the UK.

Your salary in Dubai, your investment income in Singapore, and a gain on a French holiday home generally fall outside it. Your residence status for the tax year decides which side of that line each item of income sits on, so it is the first thing to establish.

Who Needs to File a Self-Assessment Tax Return?

You will usually need to file a UK return as a non-resident if any of the following apply:

You receive UK rental income. Letting out a UK property almost always brings you into Self Assessment, whatever your residence status.
You are self-employed with UK trading income, or a partner in a UK partnership.
You have UK income that was not fully taxed at source, such as statepension or investment income.
You have taxable interest from a UK bank or building society.
You made a taxable gain on UK land or property, which also carries its own 60-day reporting requirement.
HMRC has issued you a notice to file. Once you receive one, the obligation stands until HMRC withdraws it, even if you think nothing is due.

If none of these apply and your only UK income already has the correct tax deducted, you may not need to file at all. Having said that, there are compelling reasons to remain engaged with HMRC, which we will come to below.

Benefits of Filing for Expat Tax Returns in the UK

Done properly, a return often works in your favour:

You can reclaim overpaid tax. Over-deducted tax and unclaimed allowances can often be refunded, as covered under the section If You Have Overpaid below.
You secure your Personal Allowance. If you qualify for it, claiming it on your return removes UK tax on the first £12,570 of your UK income. You are not entitled to the Personal Allowance as a Non-Resident unless you actually claim it! Did you know that?
You keep your record clean. A consistent filing history makes mortgages, visas, and any future return to the UK far smoother.
You avoid interest and penalties that accumulate on unfiled or underpaid returns and are painful to unwind later.

UK Tax Residence Status

You may be in no doubt that you live abroad, but UK tax residence is a technical status. You determine it yourself each year under statutory rules, and how settled you feel abroad has no bearing on the answer. It is the single most important factor determining how far UK tax reaches into your income, gains and assets, so settle it before anything else. Your residence status is decided by the Statutory Residence Test (SRT), a set of rules that looks at how many days you spend in the UK and how strong your ties to the country are.

The same salary, the same dividend, or the same property sale can be fully taxable, partly taxable, or outside UK tax altogether, depending on nothing more than where you were resident that year.

The SRT is self-assessed. You work out your own status, report it, and keep the evidence. HMRC does not issue a certificate of non-residence, so if your position is challenged your records are all that stands behind it. Keep them for six years.

The mechanics run deeper than most people expect. How a UK day is counted, the deeming rule, transit days, and the Arriver and Leaver distinction each change the answer, and all of them are set out in full on our Statutory Residence Test page.

Split Year Treatment

The UK tax year does not pause because you emigrate mid-year. Normally you are either resident or non-resident for a whole tax year. Split year treatment is the exception: where you meet one of the qualifying cases, HMRC splits the year into a UK part and an overseas part, so you are taxed as a resident only for the portion of the year before you left (or after you arrived).

This matters most in the year you actually move. Without it, income earned abroad after your departure could be dragged into UK tax.

Split year treatment must be claimed on the Self-Assessment return, and it only applies where you are UK resident for the full tax year under the SRT. You claim it on the SA109 residence pages: tick box 3 and state which of the defined cases applies in box 40. If you do not fit a case, the whole-year rule applies instead.

The Foreign Income and Gains (FIG) Regime

On 6 April 2025 the UK abolished the remittance basis and removed domicile as the connecting factor for both foreign income and gains and Inheritance Tax, replacing it with a residence-based system. Domicile has not disappeared from the tax code altogether: it still governs deaths and transfers before 6 April 2025, it still appears in several older double taxation conventions, and it still matters for settled property where the settlor died before the reform. But for the questions this guide deals with, residence has replaced it. The centrepiece for new arrivals is the Foreign Income and Gains (FIG) regime.

If you become UK resident after at least 10 consecutive tax years of non-residence, you can claim the FIG regime for the year you arrive and the following three tax years. During those years you pay no UK tax on qualifying foreign income and gains, and, unlike the old remittance basis, you can bring that money into the UK without triggering a charge.

Two details decide whether it is worth having. The window is fixed by the calendar, not by your claims: it runs from your first qualifying year whether or not you claim in each one, so a year you skip is a year you lose. And you must claim separately for every year you want the relief, giving up both your Personal Allowance and your capital gains annual exempt amount for that year. If your foreign income is modest and your UK income substantial, the arithmetic can favour not claiming at all. Model it year by year before you commit.

Overseas Workday Relief (OWR) sits alongside the FIG regime and is easy to overlook. If you qualify for FIG and perform some of your employment duties outside the UK, OWR can take the overseas portion of your employment income out of UK tax for the same four years. Since April 2025 the relief no longer requires you to keep those earnings offshore, and it is capped at the lower of 30% of your employment income or £300,000 a year.

What’s Changed for Non-Doms

The reform ended the remittance basis for good. Long-term residents are now taxed on worldwide income and gains regardless of domicile, and Inheritance Tax has shifted onto a residence footing too, covered under the section Inheritance Tax Rules for Expats below. Transitional reliefs soften the move for people who used the remittance basis before April 2025, including a reduced-rate facility for remitting older foreign income and the Capital Gains Tax rebasing described later in this guide.

Example

Priya moves to the UK in June 2025 after 15 years living and working in Singapore, with no UK residence in that time. She keeps a Singapore rental property and an investment portfolio. Because she was non-resident for at least 10 straight years, she can claim the FIG regime. For her first four UK tax years she pays no UK tax on the Singapore rent or the portfolio gains, and she can remit those funds to the UK freely. From her fifth year she is taxed on her worldwide income like any other UK resident, so many people in Priya’s position plan around that cliff edge well in advance.

UK Tax Returns for Expats and Non-Residents

An expat return looks much like a resident one, with one crucial addition: the SA109 residence pages. These tell HMRC that you are non-resident, which tax year rules apply to you, and whether you are reporting split-year treatment or claiming the Foreign Income and Gains regime. Without the SA109, HMRC has no way of knowing you are non-resident, and will tax you as though you never left. How to complete and file it, including the trap that HMRC’s own free service will not accept it, is set out under the section Residency Considerations: the SA109 Form below.

That form is where much of the complexity lives. It draws on the Statutory Residence Test, double taxation agreements, and the post-2025 rules for former non-doms.

When Do I Register for Self Assessment?

If you have never filed a UK return before, you must tell HMRC by 5 October following the end of the tax year in which the UK income or gain first arose. For income arising in 2026/27, that means registering by 5 October 2027. Registration gives you a Unique Taxpayer Reference (UTR), and nothing can be submitted until it arrives. That usually takes a couple of weeks, and longer where HMRC has to post it to an overseas address, which is why leaving registration until the deadline itself is such a common cause of missed filings. If you already hold a UTR from an earlier year, you do not need to register again.

Payment Deadlines

Tax for a tax year is due by 31 January following the end of it. If your bill is large enough, HMRC also asks for payments on account: two advance instalments towards the next year’s tax, each normally half of the previous year’s liability, with a balancing payment the following January. Interest runs on anything paid late.

What Are the UK Tax Filing Deadlines for Expats?

The filing deadlines for expats are the same as for UK residents, with one wrinkle: filing the SA109 usually pushes you to the earlier 31 October paper deadline.

The filing and payment calendar for a tax year running 6 April to 5 April is:

Date	What is due
5 October (following the end of the tax year	Register for Self Assessment, if this is your first return.
31 October (following the end of the tax year)	Paper return deadline.
31 January (following the end of the tax year)	Online return deadline, and the date the balancing payment is due.
31 July (following the end of the following tax year)	Second payment on account, where applicable.

Taxes You Need to Pay as an Expat

Once you know your residence position, the next question is which UK taxes can reach you. Depending on your circumstances, several can apply at once. This table summarises the main ones and when they bite, and each is covered in detail below.

Tax	When it typically applies to a non-resident
Income Tax	On UK-source income such as UK rental profits, UK pensions, UK trading profits, some UK investment incomes and employment earnings for certain duties performed in the UK
Capital Gains Tax	On disposals of UK land and property and shares in ‘property rich’ companies and unit funds. Most other assets are outside UK Capital Gains Tax (CGT) while you are non-resident, subject to the temporary non-residence rules.
Inheritance Tax	On your worldwide estate if you are a long-term UK resident (10 of the last 20 tax years). UK-situated assets are always in scope.
Stamp Duty Land Tax	On buying residential property in England or Northern Ireland, with a 2% non-resident surcharge on top of the normal rates.
National Insurance	If you work in the UK. You may also pay voluntary Class 3 contributions to protect your UK State Pension. Voluntary Class 2 for periods abroad is no longer available from the 2026/27 tax year.

Income Tax Rules for Expats

UK-source income stays taxable and foreign-source income falls away, but the detail matters. Here is how the main categories work.

Employment Income

Pay for work physically carried out in the UK is UK-source and taxable here, even for a non-resident. Pay for duties performed wholly abroad is generally outside UK tax. The tricky cases are split roles, where someone works partly in the UK and partly overseas, in which case the UK usually taxes the portion relating to UK workdays. A double taxation agreement can change the outcome, so cross-border employees should check their specific treaty.

Self-Employment Income

Profits from a trade carried on in the UK remain taxable here. If you run your business entirely from your new country of residence and it has no UK permanent establishment, the profits are usually taxed there instead, not in the UK. Where the business straddles both countries, the treaty and the location of the work decide how the profit is divided.

Investment Income

UK dividends and interest are UK-source, but they get special treatment for Non-Residents under the disregarded income rules, set out in full below. Foreign dividends and interest are outside UK tax while you are non-resident. Income and Gains from UK Government Bonds are exempt from all forms of UK taxation whilst you are Non-Resident, including Inheritance Tax.

Stock Options and Share-Based Incentive Schemes

Share options and similar awards are a common trap because the tax often follows where you worked during the period the award was earned, not where you were when it paid out. An option granted while you worked in the UK can stay partly within UK tax even if it vests years after you leave. These awards need to be looked at individually, and the treaty position checked, before you assume they are tax-free.

2026/27 UK Income Tax Rates

Once income is identified as UK-taxable, it is taxed at the normal UK rates and bands. Non-residents do not get a lower rate simply for living abroad. What changes is the scope of what is taxed and the reliefs available. The rate itself is the same.

For the 2026/27 tax year, the main Income Tax rates and bands are:

Personal Allowance: £12,570 (tapered away once income exceeds £100,000, and gone entirely at £125,140).
Basic rate, 20%: on taxable income up to £37,700 above the allowance.
Higher rate, 40%: on taxable income between roughly £50,270 and £125,140.
Additional rate, 45%: on taxable income above £125,140.

These thresholds are frozen until 5 April 2031, which quietly pulls more income into higher bands as earnings rise. Scotland sets its own Income Tax rates and bands, so Scottish-source income can differ.

Dividends are the exception. Rates rose on 6 April 2026, so older guidance still shows the wrong figures. For 2026/27 the ordinary rate is 10.75% (up from 8.75%), the upper rate is 35.75% (up from 33.75%), and the additional rate stays at 39.35%. The dividend allowance remains £500.

One change worth diarising: from 6 April 2027, property income and savings income each move onto their own rate ladders at 22%, 42% and 47%. For a Non-Resident whose UK income is mostly rent, that is a rise.

Personal Tax Allowance for Expats

The Personal Allowance, £12,570 as set out above, is the amount of UK income you can receive before Income Tax is due. As a non-resident, whilst you might be entitled, you do not get it unless you claim it. There are two hurdles: whether you qualify at all, and whether you actively claim it.

The legislation lists more routes than most guidance mentions. The commonest is being a national of the United Kingdom or of an EEA state. Note “UK national”, not “British citizen”: the wider term takes in British Overseas Territories citizens and British Nationals (Overseas), who would fail a narrower citizenship test. EEA nationals still qualify after Brexit.

You may also qualify if you are, or have been, employed in the service of the Crown. Former Crown servants count, not only those employed during the year in question. The remaining routes catch people who assume they are excluded: residents of the Isle of Man or the Channel Islands, people resident abroad for reasons of health (their own or a family member’s), residents of a territory under Crown protection, employees of a missionary society, and the widow or widower of a Crown servant. The double taxation agreement between the UK and the country you live in may also grant it. For example, Malaysian nationals resident in Malaysia get an allowance. Always check!

If none applies, your UK income is taxable from the first pound.

Even where you qualify, the allowance is not applied by default. If you do not claim it, you do not get it, and all of your UK income becomes taxable. There are two ways to claim:

Through Self Assessment: if you are required to complete a Self Assessment tax return (or HMRC has asked you to file one), you claim the allowance within that return.
Through Form R43: if your income falls below the Self Assessment thresholds but you still receive UK income, you claim the allowance and any tax repayment due using Form R43. You can claim for the current tax year and the previous four tax years.

When Tax Is Not Due or Is Already Deducted

Some UK income arrives with tax already taken off, or with none due at all:

Tax already deducted at source: UK bank interest and many pensions may already have tax taken off, or be covered by allowances.
A treaty gives the taxing right elsewhere: a double taxation agreement can assign the income to your country of residence, so no UK tax is due despite the UK source.

The important point is that “no tax to pay” is not the same as “no return to file”. You may still need to report the income and claim the treatment that removes the charge.

Disregarded Income

Disregarded income is a genuinely useful rule for full year non-residents, and one many expats have never heard of. Certain types of UK investment income, mainly UK dividends, interest, and some pension and annuity income, can be treated as “disregarded”. When income is disregarded, HMRC works out your liability two ways and charges you the lower:

Leave the disregarded income out of the charge altogether, tax only your remaining UK income with no Personal Allowance, then add back any tax already deducted at source from the disregarded income. Since 6 April 2016 there is no tax credit or deduction at source on UK dividends, so for dividends that add-back is nil.
Tax all of your UK income, including the disregarded income, with the Personal Allowance if you are entitled to it.

You pay whichever comes out lower. The first route is the one people miss: your dividends drop out of the UK charge entirely, and the price is your Personal Allowance. If your UK income is mainly dividends and interest, that can cut the bill sharply, sometimes to nothing. If you are a landlord with substantial rent, the second route usually wins, because the allowance is worth more than the dividends cost.

Example. Two Non-Residents each receive £32,000 of UK income in 2026/27, split differently. The Personal Allowance is £12,570, the dividend allowance £500, and the ordinary dividend rate 10.75%.

	Landlord: £18,000 rent, £14,000 dividends	Investor: £3,000 rent, £29,000 dividends
Route 1: dividends disregarded, no Personal Allowance	£3,600	£600
Route 2: all UK income taxed, Personal Allowance claimed	£2,537	£2,035
HMRC charges the lower	£2,537	£600

Same total income, opposite answers. The landlord is better off claiming the Personal Allowance, while the investor is better off giving it up and saves £1,435 by doing so. That is why the allowance and the disregarded income rules have to be modelled together.

Capital Gains Tax Rules for Expats

As a general rule, non-residents are outside UK CGT on most assets. You can usually sell foreign property, or shares in most companies, without a UK CGT charge while you are non-resident. The major exception is UK land and property, which stays within UK CGT whatever your residence status. A second exception, the temporary non-residence rules, can pull gains you made while abroad back into charge if your time away is short, and it is set out under the section If You Return to the UK Within 5 Years, below. Cryptoassets are a common question here. HMRC generally treats exchange tokens as located where their beneficial owner is resident, so a non-resident’s crypto gains usually fall outside UK CGT, though this is an evolving area and the position should be checked before you rely on it.

For disposals in 2026/27, CGT rates are 18% for gains falling within the basic rate band and 24% for gains above it, with an annual exempt amount of £3,000 per person.

Capital losses do not apply themselves. A loss must be actively claimed, and once claimed it can be set against gains. If you sold a UK property at a loss while non-resident and never reported it, you may have thrown away relief you could still claim.

Capital Gains Tax Rules for Selling a UK Property

Selling UK residential property as a non-resident brings two obligations: first, you must report the disposal and pay any CGT due within 60 days of completion, separately from your annual return, and reporting is required even when the result is a loss.

Second, you only pay CGT on the gain arising since the date non-resident CGT was introduced for that kind of asset: 5 April 2015 for residential property, and 5 April 2019 for non-residential property and indirect disposals.

How you calculate the gain depends on which of those you are selling, and the difference is easy to miss. For residential property held on 5 April 2015 you have three options: rebase to the 5 April 2015 value, which is the default, apportion the gain on a straight line over the whole period of ownership, or compute the actual gain across the entire ownership period. For non-residential property and for all indirect disposals there are only two: rebase to the 5 April 2019 value, again the default, or compute the gain over the whole period. Straight-line time apportionment is not available for those. The alternatives to the default are elections, which have to be formally made rather than assumed.

Example. A Non-Resident bought a UK residential property in April 2005 for £250,000. It was worth £270,000 on 5 April 2015 and sold in April 2026 for £450,000, so 11 of the 21 years of ownership fall after the rebasing date. Capital Gains Tax at 24%, after the £3,000 annual exempt amount:

Method	Chargeable gain	CGT at 24%
Rebase to the 5 April 2015 value (the default)	£180,000	£42,480
Straight-line apportionment over the ownership period	£104,762	£24,423
Actual gain over the whole period of ownership	£200,000	£47,280

The default is not always the cheapest. Electing straight-line apportionment here saves £18,057, because most of the growth came after 2015 and rebasing only strips out the value at that date. Where a property rose sharply before April 2015, the default usually wins instead. Work all three through before you choose.

CGT Rebasing (2025 Transitional Relief)

Separately from the property rules above, the 2025 non-dom reforms introduced a rebasing relief for Capital Gains Tax. If you are a former remittance basis user, you can rebase personally held foreign assets to their market value as at 5 April 2017 when you dispose of them. In plain terms, only the growth in value from 5 April 2017 onwards is brought into charge, instead of the whole gain from original acquisition.

The rebasing date is 5 April 2017, not 2025. The relief arrived with the 2025 reforms, but the value it locks in is the 2017 figure.

Four conditions have to be met, and they disqualify more people than “conditions apply” suggests:

You were neither UK domiciled nor deemed UK domiciled at any point before the 2025/26 tax year.
You actually made a remittance basis claim in at least one tax year from 2017/18 to 2024/25. Being eligible to claim is not enough.
You held the asset personally on 5 April 2017 and dispose of it on or after 6 April 2025.
The asset was situated outside the UK throughout the period from 6 March 2024 to 5 April 2025.

Check your own history against all four before relying on it.

Inheritance Tax Rules for Expats

Inheritance Tax (IHT) changed fundamentally on 6 April 2025. It used to hinge on domicile; it now hinges on long-term residence. You are a “long-term UK resident”, and so exposed to UK IHT on your worldwide estate, once you have been UK resident for at least 10 of the previous 20 tax years.

For expats, the important feature is the tail. Long-term resident status does not end the moment you leave. Depending on how long you were resident, you can remain within UK IHT on your worldwide estate for between three and ten years after departure. Someone who was resident for 10 to 13 years, for example, stays in scope for three years after leaving. UK-situated assets such as UK property remain subject to IHT regardless of residence. The nil-rate band is £325,000 for 2026/27, with the additional residence nil-rate band of £175,000 available in qualifying cases. Neither rises with inflation. The nil-rate band has sat at £325,000 since April 2009 and is currently fixed until 5 April 2031, so as asset values rise, more estates are drawn into charge without any rate ever changing.

Stamp Duty Land Tax Rules for Expats

If you buy residential property in England or Northern Ireland and you are non-resident for Stamp Duty Land Tax (SDLT) purposes, you pay a 2% surcharge on top of the normal rates.

The SDLT residence test is its own test, and it is not the Statutory Residence Test. A refund mechanism also exists: meet the 183-day UK presence requirement in the 12 months following completion, and you can amend the return and reclaim the 2%.

National Insurance and Social Security

National Insurance (NI) is separate from Income Tax and follows its own logic when you move abroad. Whether you keep paying depends on where you work and any social security agreement between the UK and your new country. If you work abroad for an overseas employer, you generally stop paying UK NI and pay into the local system instead.

Many expats keep contributing voluntarily to protect their UK State Pension, and the rules changed from the 2026/27 tax year. You can no longer pay voluntary Class 2 contributions for time spent abroad. Class 3 is the only route, and at £18.40 a week against Class 2’s £3.65 it costs £767 more a year.

Eligibility tightened at the same time. To pay Class 3 for periods abroad you now need either ten years of continuous UK residence or ten qualifying years on your record, up from three. A transitional rule helps anyone who applied on form CF83 before 6 April 2026, who can still use the old three-year test provided they pay by 5 April 2027. Years before 2026/27 are unaffected, so gaps in earlier years can still be filled on the old basis.

If you are posted abroad temporarily by a UK employer, a social security agreement or the relevant certificate may keep you in the UK system for a set period. Check your NI record before deciding, and if HMRC has written to you about the Class 2 change, deal with it before 5 April 2027.

How to File Your Tax Return from Abroad

Filing from abroad is mostly the same exercise as filing from the UK, with one form and one restriction that change how you go about it.

Before you start, get the paperwork together. For a typical non-resident return that means:

Account and access: your UTR and Government Gateway details, which take longer to set up from overseas because HMRC’s identity checks assume a UK phone number and address.
Residence evidence: a record of UK days for the tax year, since your SA109 entries depend on it. Keep travel documents and a running day count.
Rental income: statements from your letting agent, invoices for repairs, insurance, agent fees and any council tax paid during voids, and your NRLS approval or the tax deduction certificates from your agent or tenant if you are not yet in the scheme.
Employment and pensions: P60s, P45s or payslips for any UK employment, and pension statements showing tax deducted at source.
Investment income: bank and building society interest certificates, and dividend vouchers.
Property disposal: completion statements, the original purchase contract, and receipts for capital improvements, plus the 60-day return you already filed.
Foreign tax credit: foreign tax certificates for anything you are claiming credit for, a certificate of residence where a treaty claim needs one, and the exchange rates used to convert foreign figures into sterling.

Keep all of it for six years after the filing deadline, which is how long HMRC can go back.

Residency Considerations: the SA109 Form

If you are non-resident, or you are reporting split-year treatment or claiming the FIG regime, you report your residence position to HMRC on the SA109 pages, filed alongside your main SA100 return. The form was retitled for 2026 and is now “Residence and foreign income and gains (FIG) regime etc”. Older guidance calls it “Residence, remittance basis etc”, which is a useful signal that the guidance predates the reform.

There is a trap here. HMRC’s own online Self Assessment portal does not support the SA109. You cannot declare yourself non-resident through it, and entering an overseas address is not enough. To file the SA109 you have three options:

File on paper, sending the SA100 and SA109 together by post, remembering the earlier 31 October deadline.
Use commercial Self Assessment software that supports the residence pages, often labelled the “residence” or “remittance basis” section.
Use a tax agent such as Spice Taxation to prepare and submit the return on your behalf.

For most non-residents, software or an agent is the only realistic route.

Making Tax Digital and How It Will Affect Non-Residents with UK Income

Making Tax Digital (MTD) is HMRC’s move towards digital record-keeping and quarterly updates. For Income Tax it is being phased in for the self-employed and landlords by income: above £50,000 from April 2026, above £30,000 from April 2027, and above £20,000 from April 2028.

Your position as a Non-Resident turns on the SA109. If you filed Form SA109 with your 2024/25 return, you do not need to join MTD before 6 April 2027.

UK Expat Tax Reliefs

Several reliefs exist specifically to stop expats being taxed twice or taxed unfairly on UK income.

Double Taxation Agreement

A double taxation agreement (DTA) is a treaty between the UK and another country that decides which of them can tax a given type of income, and prevents the same income being fully taxed in both. The UK has one of the widest treaty networks in the world. A DTA might, for example, give your country of residence the sole right to tax your pension, or cap the UK tax on certain income. The UK-Singapore agreement is a good example, setting out how pensions, dividends and interest are split between the two, which matters given that Singapore does not generally tax individuals on foreign-sourced income. Check your own treaty first whenever income looks taxable in both countries.

Foreign Tax Credit

Where income is taxable in both countries, foreign tax credit relief lets you offset tax paid in one against the tax due in the other. It is the safety net for when a DTA reduces an overlap but does not remove it.

Two things about it are commonly missed. It is not automatic: you claim it on the foreign pages of your Self Assessment return. And the credit is capped at the lower of the UK tax due on that income and the foreign tax the treaty permits the other country to charge. That second limb matters: if you suffered more at source than the treaty allows, HMRC will not credit the excess, and your recourse is against the foreign tax authority. Where the treaty allows it, stopping the foreign tax at source using a certificate of residence is cleaner than reclaiming afterwards.

If You Have Overpaid

If you have paid more UK tax than you owe, you can claim it back. Non-resident landlords taxed at source, expats whose Personal Allowance was never applied, and anyone over-taxed on UK investment income are common candidates for a refund. You claim either through your Self Assessment return or, if you are outside Self Assessment, using Form R43. The same four-year window applies, so review past years too.

What Happens With Late Expat Tax Returns?

A late return does not go away, and the cost climbs the longer it sits. HMRC applies penalties automatically, interest accrues on unpaid tax, and a persistent gap causes problems well beyond the tax itself. Filing late is always better than not filing, and if you have several years outstanding, HMRC’s disclosure routes can help you get straight, usually on better terms than waiting to be found.

Late Filing Penalties

The penalties for a late Self Assessment return stack up in stages:

How late	Penalty	Running total (minimum)
The day you miss the deadline	£100, even if you owe nothing	£100
3 months late	£10 a day, up to a maximum of £900	£1,000
6 months late	The greater of £300 or 5% of the tax due	£1,300
12 months late	A further £300 or 5% of the tax due, whichever is greater	£1,600
Tax paid late	Separate penalties and interest on the tax itself, on top of the filing penalties	Varies with the tax owed

Left unaddressed for a year, a single missed return reaches £1,600 in penalties before any tax is even counted.

Tax Planning Strategies for Expats

Good tax planning means arranging your affairs sensibly within the rules. It is a different thing from tax avoidance. A few strategies come up repeatedly.

Use Joint Ownership for UK Assets

Holding a UK property or other asset jointly, for example with a spouse, spreads income across two Personal Allowances and two sets of bands, and gains across two annual exempt amounts. Where one partner has little other UK income, that can meaningfully cut the combined bill.

Structure Offshore Savings Efficiently

Timing disposals for years in which you are clearly non-resident can protect gains that would otherwise be caught, subject to the temporary non-residence rules set out under If You Return to the UK Within 5 Years below.

Register for the Non-Resident Landlord Scheme (NRLS)

If you rent out UK property while living abroad, your letting agent or tenant is required to deduct 20% tax from the rent before it reaches you, once the rent passes £100 a week. Registering for the Non-Resident Landlord Scheme on form NRL1i stops that deduction, so the rent arrives gross and you settle the tax through Self Assessment instead. Most non-resident landlords should register.

Explore International Pension Transfers

Moving a UK pension abroad, for instance to a recognised overseas pension scheme, can suit some expats, but the rules are strict and the charges for getting it wrong are severe. Recent changes have narrowed the circumstances in which a transfer is tax-free. Take specialist advice before you act, from someone independent of the provider selling the transfer.

Retirement Planning

Retiring abroad changes how your UK pensions are taxed. Once you are Non-Resident, the answer turns on which pension you hold and what the treaty with your country of residence says about it. There are three categories, and they are treated differently.

UK State Pension is a taxable UK benefit, though it is usually paid without tax deducted, and a double taxation agreement often gives the taxing right to your country of residence.
Private and workplace pensions can usually be paid gross to residents of treaty countries, so the income is taxed only where you live.
Government service pensions are the exception most people miss. Under most UK treaties, a pension for service to the Crown or a local authority stays taxable only in the UK, whatever your treaty says about other pensions. If you were a civil servant, in the armed forces, or worked for a local council, do not assume your pension follows you.

Where a treaty gives the taxing right to your country of residence, on the State Pension or on a private or workplace pension, that relief is not applied for you. You claim it on form DT-Individual, and the payer only stops deducting UK tax once HMRC directs it to. Until that direction arrives, tax keeps coming off and you are into a refund rather than a clean start. Take advice well before you draw anything, because the order and location in which you take income can change your lifetime tax bill.

What If You Are Planning to Return to the UK?

Coming back is as much a tax event as leaving, and it rewards planning before you land.

Key Considerations on Repatriation

The tax year in which you return is critical. From the date UK residence resumes, your worldwide income and gains come back into UK scope, so the timing of a bonus, a share sale, or a property disposal can make a large difference. Split year treatment may apply to the year of return, taxing you as a resident only from your arrival. Reviewing your income and assets before you move back, while you are still non-resident, is where most of the value lies.

Repatriation Pitfalls to Avoid

Three classic mistakes catch people out:

Realising large foreign gains at the wrong time, just after becoming UK resident rather than just before.
Overlooking the temporary non-residence rules, set out below.
Assuming income earned abroad before return is automatically safe, when some of it may still be caught.

If You Return to the UK Within 5 Years

The temporary non-residence rules exist to stop people sidestepping UK tax with a brief spell abroad. They apply if you had sole UK residence in at least four of the seven tax years before you left, and your period of non-residence is five years or less. Certain income and gains you realised while non-resident then become taxable in the year you come back. This most often catches dividends from a company you control and gains on assets you owned before leaving.

The five-year period starts on the date you become non-resident and expires on the fifth anniversary of that date, provided you are still non-resident at that point. It runs in years and days from departure, not in complete tax years, so the exact date of your return matters.

UK Tax Checklist for Non-Residents

Before you file, run through the essentials.

Step 1: Establish your position

Confirm your residence status under the Statutory Residence Test, and keep your travel records.
Identify every source of UK income and any UK property gains.
Check the relevant double taxation agreement before treating income as taxable in both countries.

Step 2: Decide your reliefs

Decide whether to claim the Personal Allowance, and weigh it against the disregarded income rules.

Step 3: File and pay

Complete the SA109 residence pages, and choose a filing route that supports them.
Report any UK property disposal within 60 days, separately from the annual return.
Register by 5 October if this is your first return, and pay by 31 January.

Why Choose Spice Taxation for Help With UK Expat Tax Returns?

Over 30 years of UK tax experience: led by Martin Rimmer, a Fellow of the Association of Taxation Technicians who has advised British expats since 1997, with Tax Manager Christine Teo covering UK and Singapore personal tax.
UK expat tax is all we do: an independent UK personal tax practice built around British expats and internationally mobile clients, more than 80% of whom live outside the UK.
Based in Singapore: we work in your time zone and deal with cross-border and Non-Resident issues every day, including the SA109 that so many software packages and DIY filers get wrong.
Helping Clients around the World: Whilst we are based in Asia, we are able to help you wherever in the world you live. We have clients in Australasia, the Americas, Europe, Africa – but none in Antarctica yet; maybe that will come soon!
Fixed fees, agreed up front: you know the cost before you commit.
Planning flagged early: we spot the expensive moments before they arrive, whether a move in either direction, a UK property sale, a pension decision, or the year your FIG or long-term residence position changes.
Reliefs actually claimed: we make sure you receive every allowance and relief you are entitled to.
Independent advice, no referral arrangements: we operate without commercial relationships with financial advisers, insurance companies or property agents, so our advice reflects your position and nothing else. If you ask us to make introductions to specialists in other disciplines (financial advisers, lawyers, property specialists etc), there are made purely on the basis of merit and we receive no form of remuneration if you engage with those third parties. Our interest is purely in getting you into the best and most capable hands for that third party work.

If any of that sounds like your situation, a short conversation on tax now usually saves far more than it costs later.

FAQs

I’m an Expat. Do I Still Have to Pay UK Tax?

Yes, if you receive UK income or make a gain on UK property. What arises in the UK stays taxable; what arises abroad generally falls away once you are Non-Resident.

Do I get the Personal Allowance automatically as a Non-Resident?

No, you do not. The law says that a Non-Resident must claim the Personal Allowance, either when they complete their tax return or by filing the Form R43. If you have income within the level of the Allowance but don’t file a Tax Return or a Form R43, the income is taxable. So, you file in order to ensure that you get the benefit of the allowance, even if that means there is no tax to pay.

How Do I File a Tax Return as an Expat?

You file the SA100 return together with the SA109 residence pages. HMRC’s free online service does not support the SA109, so the route is paper, commercial software, or a tax agent.

What Happens If I Don’t File My Tax Return as an Expat?

The obligation itself does not lapse, and HMRC can still require the return years later. The financial cost is only part of it, because an unfiled record follows you into anything that depends on a clean tax history. If you are behind, filing late or using HMRC’s disclosure routes is far better than doing nothing.

What if I know I am behind with my Tax Returns or have realised only now that I should have done something years ago? How can you help?

First of all, don’t panic. Talk to us and we will advise on the best way to bring you up to date, manage the process with HMRC and bring you back to a place of compliance. This is work we do frequently for our clients. Whilst we can’t promise that there won’t be penalties for late filing, we can promise to get you back up to date as painlessly as possible with the assurance of knowing that you are being represented soundly and professionally by people who are on your side.

What should I do if I get a ‘Nudge Letter’ from HMRC?

Because of automatic exchange of information protocols, HMRC is coming into more and more data about your non-UK incomes and gains. HMRC compares this to the tax returns they receive (or don’t receive) and when they think there may be a gap which could represent underdeclared income (and thus underpaid tax) they send ‘nudge letters’. It is quite common for Non-Residents to get these as well. The same principle as above – don’t panic, get in touch, we will have a conversation and decide how best to respond to it. If something needs to be updated in an earlier tax return or if you haven’t filed one but needed, we can take care of it. If the outcome of the nudge letter is that nothing further needs to be done, we will communicate that clearly with HMRC.

What Are Non-Resident Tax Return Penalties?

The same Self Assessment penalties apply as for UK residents, starting at £100 the day you miss the deadline. The full schedule is set out under Late Filing Penalties above.

Can I Get a Tax Rebate If I Live Abroad?

Yes. If your UK tax was over-deducted, or your Personal Allowance was never claimed, you can reclaim the excess through your return or on Form R43, generally for the current year and the previous four tax years.

Do I Need to Tell HMRC When I Leave the UK?

Yes. If you complete Self Assessment, you tell HMRC through the return, using the SA109. If you do not, you can notify HMRC using Form P85. Telling HMRC promptly is what allows your residence status, and any refund due, to be sorted out correctly.

What If I Am Resident in More Than One Country?

If two countries both treat you as resident, the “tie-breaker” rules in the relevant double taxation agreement decide which one has the primary taxing right, based on factors such as where your permanent home and closer personal and economic ties lie. This is a common situation in the year of a move, and it is one where professional advice is especially worthwhile.

Do I Need to File a Self Assessment If I Only Have PAYE Income?

Usually not, if your only UK income is taxed correctly under PAYE and nothing else applies. A return is required if you rent out UK property, work for yourself in the UK, have taxable interest from a UK bank or building society, hold a pension outside the UK and were UK resident in one of the previous five tax years, have any other untaxed UK income, or HMRC has issued you a notice to file. Filing voluntarily can also be worth it where PAYE was over-deducted from employment or pension income, or where the temporary non-residence rules pull income back into charge in the year you return. Separately, if you are still building up benefits in a UK pension scheme and your pension input exceeds the annual allowance, the resulting charge is reported through Self Assessment on the SA101 additional information pages.

Can a Non-Resident Claim Private Residence Relief?

Yes, but only for periods when the property was genuinely your main home, plus certain periods of deemed occupation. The final 9 months of ownership always qualify, provided the property was your main residence at some point during your ownership. As a Non-Resident there is an extra condition that catches people out: for a tax year to count towards the relief, you or your spouse must spend at least 90 nights in that property, or across your other UK properties, during that year, unless you meet the alternative work-day test. A year that fails it is treated as non-qualifying and the relief attaching to it is lost.

How Will HMRC Pay a Refund If I Live Abroad?

HMRC usually issues repayments by cheque, which is slow to arrive and often awkward to bank overseas. To be paid directly instead, give your account number and sort code on the tax return, or on Form R43 if you are claiming outside Self Assessment.

References

HM Revenue & Customs. (2026). Tax on your UK income if you live abroad. GOV.UK. https://www.gov.uk/tax-uk-income-live-abroad

HM Revenue & Customs. (2026). Check if you can claim the 4-year foreign income and gains regime. GOV.UK. https://www.gov.uk/guidance/check-if-you-can-claim-the-4-year-foreign-income-and-gains-regime

HM Revenue & Customs. (2025). Remittance basis changes. GOV.UK. https://www.gov.uk/guidance/remittance-basis-changes

HM Revenue & Customs. (2025). Inheritance Tax if you’re a long-term UK resident. GOV.UK. https://www.gov.uk/guidance/inheritance-tax-if-youre-a-long-term-uk-resident

HM Revenue & Customs. (2026). Rates of Stamp Duty Land Tax for non-UK residents. GOV.UK. https://www.gov.uk/guidance/rates-of-stamp-duty-land-tax-for-non-uk-residents

HM Revenue & Customs. (2026). Income Tax rates and Personal Allowances. GOV.UK. https://www.gov.uk/income-tax-rates