You moved to Portugal, kept the UK property, and now the rent lands in your account every month. Brilliant — until you start wondering which country actually gets to tax it, and at what rate.

UK rental income is one of the most common questions I get from British expats here in the Algarve. The good news is the rules are not as scary as they look. The bad news is that getting them wrong can mean paying tax twice, missing reliefs you are legally entitled to, or being chased by HMRC for forms you did not know existed. This guide walks you through how UK rental income is taxed when you are a Portuguese tax resident in 2026, and what to do to keep both tax authorities happy.

The Golden Rule: UK Property Income Is Always Taxed in the UK First

Under the UK-Portugal Double Taxation Convention, income from UK property is taxed in the country where the property sits. So if your flat in Bristol or your buy-to-let in Manchester earns rent, the UK has the primary right to tax that income — full stop. Moving to Portugal does not change that.

What it does change is your residency. As a Portuguese tax resident you also have to declare your worldwide income to the Portuguese tax authority (Autoridade Tributária, or AT). The UK rent goes on your Portuguese tax return too. That sounds like double taxation, but it is not — and this is where most expats get confused. Portugal credits you for the UK tax already paid, so you do not actually pay twice on the same pound. The mechanism is called the foreign tax credit, and it is built into the treaty.

There is one important wrinkle. Even though UK tax has priority, Portugal still has the right to apply its own rate. If the Portuguese rate is higher than the UK rate, you will owe the difference to Portugal. If it is lower or equal, you owe nothing extra. The credit can never exceed the Portuguese tax due on the same income.

How HMRC Treats Your Rent: Welcome to the Non-Resident Landlord Scheme

The moment you become non-UK resident, you fall under the Non-Resident Landlord (NRL) Scheme. This is HMRC’s way of making sure rental income from absentee landlords does not slip through the cracks.

By default, your letting agent — or your tenant directly, if you self-manage — is legally required to withhold basic rate UK income tax (20%) from your rent before paying you. That is the headline rate, applied to the gross rent. If you do nothing, that is what happens.

Almost nobody wants that. Withholding 20% of the gross rent ignores all your allowable expenses, your personal allowance, and any losses. Most landlords end up with too much tax withheld and have to claim it back at the end of the year.

The fix is simple. Apply to HMRC for approval to receive your rent gross, using form NRL1 (for individuals). Once approved, your agent or tenant pays you the full rent, and you settle up directly via your annual self-assessment tax return. It usually takes a few weeks to process, and approval is almost always granted as long as your UK tax affairs are up to date.

Yes, You Still File a UK Tax Return

Being non-resident does not exempt you from UK self-assessment when you have UK source income. You will need to file an SA100 with the SA105 (UK Property) supplementary pages, plus the SA109 (Residence) pages declaring your non-resident status. The deadline is 31 October for paper returns and 31 January for online — but online filing is restricted for non-residents, so most expats use commercial software or an accountant.

What You Can Deduct From UK Rental Income

UK landlords can offset a long list of expenses before tax is calculated. These deductions apply equally whether you live in Birmingham or Burgau. Common allowable expenses in 2026 include:

• Mortgage interest — but only via the 20% basic rate tax credit, not as a direct deduction (this changed in 2020 and still trips people up)
• Letting agent and management fees
• Buildings and contents insurance
• Repairs and maintenance (but not improvements, which are capital)
• Council tax and utilities, if you pay them between lets
• Ground rent and service charges on leasehold property
• Accountant’s fees for preparing the rental accounts
• Travel costs for property-related visits (within reason — keep evidence)

One critical point: you still get your UK personal allowance as a non-resident if you are a British or Irish citizen, or a citizen of a country with the right reciprocal treaty (the UK-Portugal treaty does give Brits this right). In 2026/27 the personal allowance is £12,570. That means the first £12,570 of your UK rental profit is tax-free in the UK before basic-rate tax kicks in at 20%, higher rate at 40% above £50,270, and additional rate at 45% above £125,140.

How Portugal Taxes the Same Rent

In Portugal, UK rental income is treated as Category F income — rental property income from abroad. You declare the net rental income (after allowable UK expenses) on your annual IRS return, usually due in June for the previous calendar year.

The default treatment is a flat autonomous rate of 25% on net rental income from abroad. That is higher than the 20% basic UK rate but lower than the UK higher rate of 40%. You can also opt to have it taxed at general progressive IRS rates if that works out better — which it sometimes does for lower-income retirees who would otherwise sit below the 25% bracket.

If you have already paid UK tax on the same rent, Portugal applies the foreign tax credit. The credit is the lower of (a) the actual UK tax paid, or (b) the Portuguese tax that would otherwise be due on that income. So in most cases you end up paying the higher of the two countries’ rates, but never both rates added together.

What About NHR or the Successor Regime?

This is where it gets interesting. Under the original Non-Habitual Resident regime, foreign rental income could be entirely exempt in Portugal as long as it was taxable (not necessarily taxed) in the source country under the treaty. UK rental income clearly qualified, and many British expats benefited from a Portuguese exemption while only paying UK tax on the rent.

The NHR regime closed to new applicants at the end of 2023, replaced in 2024 by the narrower Tax Incentive for Scientific Research and Innovation (often called NHR 2.0 or IFICI). Importantly, the new regime does not include the same broad exemption for foreign rental income. If you arrived in Portugal in 2024 or later and qualify for IFICI, your UK rent will generally be taxed at the standard 25% Category F rate in Portugal, with credit for UK tax paid.

If you were already an NHR resident under the old regime before the cutoff, you keep your benefits for the remainder of your 10-year period. Always check your personal status — I see people every month who do not realise which version they are on, and the difference can be thousands of euros a year.

A Worked Example: Bristol Buy-to-Let, Burgau Owner

Let’s put numbers on it. Say you own a £350,000 flat in Bristol generating £18,000 of gross annual rent. Mortgage interest is £4,000, agent fees £1,800, insurance £400, repairs £1,200. Your net UK rental profit is £10,600.

In the UK, your £12,570 personal allowance covers the whole £10,600, so you pay no UK income tax on this rent (assuming no other UK income soaking up the allowance). The mortgage interest tax credit is irrelevant because there is no tax to credit it against.

In Portugal, you declare €12,500 or so (depending on the exchange rate) of net rental income. At the 25% Category F rate, that is roughly €3,125 of Portuguese tax. You can credit any UK tax paid — but here you paid none, so the full €3,125 is owed to Portugal.

The total tax bill on the rent is therefore about €3,125 — paid entirely in Portugal. Compare that to a higher earner with £50,000+ of UK income, where the rent would push them into 40% UK tax and the Portuguese credit would wipe out most of the Portuguese liability. Same property, very different tax outcomes depending on your wider income picture.

Common Mistakes I See Every Year

Three errors come up again and again with new clients. First, not registering for the Non-Resident Landlord Scheme and watching 20% of their gross rent disappear unnecessarily for months. Second, forgetting to declare the UK rent on the Portuguese return because they assume it is already “dealt with” in the UK. The AT does eventually find out via international data sharing (the Common Reporting Standard), and the penalties for non-declaration are unpleasant. Third, claiming the foreign tax credit incorrectly — either over-claiming because they include UK National Insurance (which is not a tax for treaty purposes) or under-claiming because they forget to include it at all.

A fourth, growing issue: assuming the old NHR exemption still applies when they have actually moved across to the post-2024 regime. The rules genuinely have changed, and the planning that worked in 2022 may not work now.

Should You Keep the UK Property at All?

Tax is only one piece of the decision. Plenty of expats keep UK property for sensible reasons — somewhere to land if they move back, an income stream in sterling that hedges their currency risk, a slow-burn asset for the kids. Others find that the combined hassle of distance management, UK tax filings, Portuguese tax filings, and exchange rate uncertainty outweighs the yield.

The pure financial maths often points toward selling and reinvesting via a globally diversified, tax-efficient structure in Portugal. But it is not always the right answer. I have clients in their late 60s who deliberately keep one UK rental as their “emergency fund of last resort” — they sleep better knowing it exists, even if a spreadsheet might disagree. Personal finance is personal, and a good plan respects that.

If you are considering selling, also remember UK Capital Gains Tax for non-residents on UK residential property has been live since 2015. You will need to file a return within 60 days of completion. We covered the full CGT picture in our capital gains tax for UK expats in Portugal guide.

Frequently Asked Questions

Do I have to tell HMRC I’ve moved to Portugal?

Yes. File form P85 when you leave the UK and complete the SA109 Residence pages on your tax return for the year of departure. Without these, HMRC will continue to treat you as UK resident and tax you on your worldwide income.

Can I still claim the UK personal allowance as a Portuguese resident?

Yes, in most cases. British and Irish citizens, and citizens of EEA countries plus a few others (including those covered by specific treaty articles), retain entitlement to the UK personal allowance even while non-resident. This is one of the most valuable reliefs available to UK expat landlords.

What happens if my UK rent is paid into a Portuguese bank account?

The tax treatment is the same — the source of the income is the UK property, not the bank that receives it. But routing rent directly to a euro account can save you currency conversion costs. Compare exchange rates from specialist FX providers against your bank before deciding.

Do I pay social security on UK rental income in Portugal?

No. Rental income is not subject to Portuguese social security contributions for individuals. It is purely an income tax item.

How does Portugal know about my UK rental income?

The UK and Portugal exchange tax information automatically under the Common Reporting Standard and various bilateral agreements. HMRC also shares data with the Portuguese AT directly. Assuming non-disclosure will go unnoticed is a poor strategy.

What to Do Next

UK rental income while living in Portugal is workable, but the admin matters. Register for the Non-Resident Landlord Scheme to receive gross rent, keep clean records of UK expenses, declare the net income on both UK and Portuguese returns, and claim the foreign tax credit correctly so you only pay the higher of the two countries’ rates — not both. Check carefully which Portuguese tax regime you are under, because NHR, post-2024 IFICI, and the standard regime treat foreign rental income very differently.

If you’d like to discuss how this affects your personal situation, get in touch with our team. We specialise in helping UK expats in Portugal make the most of their pensions, property and investments — and we do the cross-border tax planning every day.

Useful external resources: HMRC guidance on tax when you live abroad and the Portuguese tax portal (Portal das Finanças).

Matthew Renier is a Chartered Financial Adviser at Arthur Browns Wealth Management, based in the Algarve, Portugal. He specialises in helping British expats manage their pensions, property and financial planning across borders.

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