If you have income from outside the UK, such as overseas dividends, rental profits, pensions, or employment earnings, you need to include it in your 2025/26 Self Assessment tax return. UK tax residents are generally taxed on worldwide income on an arising basis from 6 April 2025 onwards.
This follows major changes that ended the old remittance basis for most people. Many face more reporting requirements, but relief options exist to prevent paying tax twice on the same income.
The process can seem complicated, especially with exchange rates and foreign tax rules. Acting methodically keeps things manageable and helps you claim what you are entitled to.
Why Foreign Income Matters in 2025/26
From the 2025/26 tax year (6 April 2025 to 5 April 2026), most UK residents pay tax on foreign income as it arises, not just when brought to the UK. This applies regardless of domicile in most cases.
You report it in the Foreign pages (SA106) of your Self Assessment return. Convert amounts to sterling using HMRC-approved exchange rates for the relevant dates.
Common sources include:
- Foreign employment or self-employment income
- Overseas property rentals
- Dividends or interest from abroad
- Pensions from other countries
Failing to declare can lead to penalties, so gather statements, payslips, and tax certificates early.
The New 4-Year Foreign Income and Gains (FIG) Regime
A key change offers relief for some newcomers. If you became UK tax resident in or after 2025/26 (or in recent prior years) and were non-UK resident for the 10 consecutive tax years before arriving, you may qualify for the FIG regime.
This gives 100% relief on most foreign income and gains for your first four tax years of UK residence. You claim it on your return, but it means giving up the personal allowance and CGT annual exempt amount during those years.
Not everyone qualifies, and you can choose which sources to claim relief on. Check HMRC guidance to see if it applies to you.
For many long-term residents, standard double taxation relief is the main option.
How Double Taxation Relief Works
The UK has double taxation agreements (DTAs) with over 130 countries. These set rules on which country taxes specific income types and often allow credit for tax paid abroad.
If no DTA applies, UK unilateral relief may still let you credit foreign tax against your UK bill.
The main method is Foreign Tax Credit Relief (FTCR). You claim a credit for foreign tax paid, up to the UK tax due on that income. This reduces your UK liability pound for pound.
In some cases, you can deduct the foreign tax from the income instead, but credit relief usually saves more.
Use HMRC Helpsheet HS263 for calculations. It includes examples and a working sheet.
Declare the foreign income fully, then show the foreign tax paid and claim the credit in the relevant boxes.
Keep evidence like foreign tax statements or certificates.
Practical Steps for Your Return
- Complete the SA106 Foreign pages with details of each income source, country, and amounts in sterling.
- Note any foreign tax deducted or paid.
- Calculate or let HMRC compute the relief (software often helps).
- If claiming FIG, indicate it in the return and meet conditions.
- Submit by 31 January 2027 for online filing (or earlier if paper).
If unsure, professional advice ensures accuracy, especially with complex sources.
Tools to Stay Organised
Managing company or personal records alongside foreign income adds to the workload. Quick access to UK company information supports overall compliance, like checking filings or director details when needed.
The Companies House on the Go app provides fast searches for company data, recent accounts, confirmation statements, and updates directly on your phone.
Download for iOS: https://apps.apple.com/us/app/uk-companies-house-on-the-go/id6743302358
Or Android: https://play.google.com/store/apps/details?id=com.companiesonthe.go
For more on streamlined company admin, see Companies on the Go.
Foreign income adds complexity to your 2026 tax return, but proper reporting and claiming reliefs like FTCR or the FIG regime can significantly reduce the burden.
Gather documents now, use official HMRC tools and helpsheets, and consider support if your situation involves multiple countries.
With the right approach, you handle double taxation effectively and focus on what matters most. Stay proactive, and the process becomes much smoother.
