Do I Need to Declare Foreign Income in the UK? A Plain-English Guide

If you live in the UK and have money, property or investments abroad, you may wonder whether HMRC needs to know. In most cases, the answer is yes.

This guide explains when foreign income is taxable, what to report and what to do if it was missed, including using the Worldwide Disclosure Facility.

Are UK residents taxed on foreign income?

Yes, in most cases. If you are UK resident, you are usually taxed on income and gains from anywhere in the world.

This applies even if:

• The money stays abroad and never reaches a UK account
• The account is in a country you or your family come from
• The amounts feel small or are reinvested

Your residence status is decided by the Statutory Residence Test, not your nationality or passport.

What counts as foreign income?

Common types of foreign income include:

• Bank and savings interest from overseas accounts
• Rent from property abroad, after allowable expenses
• Dividends from foreign companies
• Foreign pensions
• Employment or self-employed income earned abroad

Selling assets abroad, such as property, shares or crypto, can also create a Capital Gains Tax bill in the UK.

What if I already paid tax abroad?

You still need to report the income. But you can usually claim Foreign Tax Credit Relief.

This reduces your UK tax by the foreign tax already paid, up to the UK tax on that income. Many double taxation agreements also decide which country taxes first.

Important: relief is claimed on your tax return. If the income was never reported, the relief has not been claimed either.

New to the UK? The 4-year FIG regime

From 6 April 2025, the old remittance basis for non-doms was replaced.

People who become UK resident after 10 consecutive years of non-residence can claim relief on foreign income and gains for their first 4 years of UK residence.

• The relief must be claimed on a tax return.
• It is not automatic.
• After 4 years, worldwide income is taxed in the normal way.

How do I report foreign income?

Foreign income is usually reported on the foreign pages of your Self Assessment tax return.

1. Check whether you need to file a Self Assessment return.
2. Convert foreign amounts into pounds sterling.
3. Claim any foreign tax credit relief.
4. File by 31 January after the end of the tax year.

What if foreign income was missed?

Do not panic. Many people simply did not know the rules.

The Worldwide Disclosure Facility lets you tell HMRC, then gives you 90 days to calculate and pay the tax, interest and any penalty.

Coming forward before HMRC contacts you usually means lower penalties. Read our step-by-step guide to using the Worldwide Disclosure Facility.

Common mistakes with foreign income

These are the errors we see most often:

• Assuming tax paid abroad is the end of it. The income still needs reporting in the UK.
• Forgetting joint accounts. Your share of interest on a joint account abroad is usually taxable.
• Ignoring reinvested income. Dividends or interest added to an account still count, even if you never withdraw them.
• Using the wrong exchange rate. Use HMRC’s published rates or the rate on the day you received the income, consistently.
• Missing a property sale. Selling a home or land abroad can create UK Capital Gains Tax, even if it was your family home there.

Records to keep

• Annual statements for every overseas account
• Rental agreements, receipts and local tax returns
• Purchase and sale documents for property and shares
• Proof of any foreign tax paid

Keep these for at least six years, and longer for offshore matters, because HMRC can usually look back up to 12 years.