UK Tax on Overseas Rental Income 2026/27: What UK Residents Must Declare

UK residents who own property overseas face a common surprise: HMRC taxes their worldwide income, and that includes rents from apartments in Spain, houses in France, villas in Portugal, or buy-to-let properties anywhere in the world. Unlike some other countries that only tax domestic income, the UK operates a residence-based taxation system for residents. This guide explains how to correctly report overseas rental income, claim relief for taxes paid abroad, and manage the interaction with mortgage interest rules and exchange rates.

Who must declare overseas rental income?

UK tax residency is determined by the Statutory Residence Test (SRT). Anyone who is UK tax resident in a given year is liable to UK income tax on their worldwide income, including:

• Rental income from residential property abroad.
• Rental income from commercial property abroad.
• Short-term lettings income (holiday lets, Airbnb) from overseas properties.

You must declare overseas rental income even if:

• The rent is paid directly into an overseas bank account.
• You never bring the money to the UK.
• The overseas country also taxes the income.
• The rental income is below the UK personal allowance.

(The last point: even if no tax is ultimately due, HMRC expects you to declare the income on a self-assessment return if your total income requires one.)

Completing the tax return: SA106

The SA106 (Foreign) supplementary pages of the self-assessment return contain a section specifically for foreign property income. You must enter:

• Gross rental income received (in sterling).
• Deductible expenses (in sterling).
• Mortgage interest (handled separately as a tax credit, not a direct deduction).
• Foreign tax paid (which may generate a tax credit).
• Net profit or loss.

If you also have UK rental income, you complete the SA105 (UK property) pages separately. The two pools are not combined.

Deductible expenses: applying UK principles overseas

The expenses you can deduct from overseas rental income mirror the rules for UK rental income:

Allowable deductions include:

• Letting agent fees and property management charges.
• Insurance premiums (buildings and contents).
• Maintenance and repairs (distinguishing between revenue repairs and capital improvements).
• Ground rent, service charges, and overseas property taxes directly attributable to the rental activity.
• Accountancy fees for preparing the rental accounts.
• Travel to inspect the property (with caveats -- HMRC is stricter where travel serves dual purposes).

Not deductible (or restricted):

• Mortgage interest: restricted to a 20% basic rate tax credit (the Section 24 restriction applies equally to overseas residential property).
• Capital improvements.
• Personal use portions of expenses where the property is also used privately.

Double tax relief: avoiding paying tax twice

Where the country in which the property is situated also taxes the rental income, the UK provides relief to avoid double taxation. There are two routes:

Double Tax Treaty (DTT): The UK has comprehensive DTTs with most countries. For rental income, treaties typically use the "credit method" -- the country where the property is located taxes the income first, and the UK then taxes the same income but allows a credit for the foreign tax paid. The credit cannot exceed the UK tax due on that income.

Unilateral relief: Where no DTT exists, or where the treaty does not fully cover the situation, the UK allows unilateral relief under domestic law -- a credit for foreign tax paid in the source country, up to the UK tax liability on that income.

Example: You receive €12,000 rent from a Spanish property. Spain levies €2,400 in withholding tax (20%). The UK assesses the same income at, say, £10,200 sterling, resulting in a UK income tax liability of £4,080 (40% higher rate). You claim a tax credit of £2,040 (the sterling equivalent of the Spanish tax). Net UK tax payable = £4,080 - £2,040 = £2,040.

The FIG regime for new UK residents

From 6 April 2025, the previous remittance basis for non-UK domiciled individuals was replaced by the Foreign Income and Gains (FIG) regime. Under FIG:

• Individuals who were not UK tax resident in the previous 10 years can elect to use the FIG regime for up to 4 tax years from the date they become UK resident.
• During the FIG period, all foreign income and gains (including overseas rental income) are exempt from UK tax.
• No need to keep money offshore -- it can be remitted to the UK without tax.
• After 4 years, the individual is fully taxed on worldwide income as a standard UK resident.

The FIG regime is particularly valuable for international investors who have recently moved to the UK and own substantial overseas property portfolios. The 4-year window provides time to plan disposals or restructuring before the full UK tax treatment applies.

Overseas property losses

Losses on overseas rental property can only be offset against other overseas property income. They cannot be:

• Offset against UK rental income.
• Offset against other UK income (salary, dividends, etc.).
• Used as a carry-back against prior years' overseas income.

Unrelieved overseas property losses carry forward indefinitely and can be used against future overseas property profits. The overseas property loss pool is separate from the UK property loss pool.

Exchange rates and record-keeping

HMRC requires overseas income to be converted to sterling. Acceptable methods:

• Spot rate on date of receipt: The most accurate method. Use the Bank of England daily sterling exchange rate or another publicly available source.
• HMRC average rates: HMRC publishes official average exchange rates for all major currencies for each tax year. Using these is acceptable and considerably less work than tracking spot rates on each receipt.

Record-keeping for overseas rental income must include: bank statements showing all receipts, invoices for all expenses, evidence of foreign tax paid (tax receipts or certificates from the foreign tax authority), and exchange rate documentation.