Handling Self Assessment for Sole Traders with UK and Overseas Income
If you are a sole trader earning income from both the UK and overseas, you must complete a Self Assessment tax return to report all your income. HM Revenue and Customs (HMRC) requires you to declare your total income, regardless of where it arises, so you can be taxed appropriately.
Reporting Income from Both UK and Overseas Sources
When filling in your Self Assessment tax return, you should include:
- UK income from your sole trade, such as sales or services provided within the UK.
- Overseas income related to your trade, including payments received from clients or customers outside the UK.
All income must be converted into British pounds using a reasonable exchange rate for the relevant tax year. Keep records of how you calculated these conversions in case HMRC requests evidence.
How to Declare Overseas Income
Overseas income that forms part of your sole trade should be included with your UK trading income when calculating your total profits in the self-employment section of the tax return. Any other foreign income not related to your trade, such as rental income or dividends, should be declared in the appropriate sections for foreign income.
Foreign Tax Relief and Double Taxation
If you have paid tax on your overseas income in another country, you may be able to claim Foreign Tax Credit Relief to avoid being taxed twice on the same income. This relief is claimed on your Self Assessment tax return, but eligibility and amounts depend on the tax treaty between the UK and the other country.
Keep detailed records of any foreign tax paid, including official receipts or statements, to support your claim.
Record Keeping
It is important to keep comprehensive records for both UK and overseas income. This includes invoices, bank statements, receipts, and currency conversion details. HMRC expects you to keep these records for at least five years after the 31 January submission deadline of the relevant tax year.
Example
Suppose you run a consulting business based in the UK but have clients in France and the US. You invoice these clients in euros and dollars. When completing your Self Assessment:
- Convert your euro and dollar income into pounds using an appropriate exchange rate for the tax year.
- Add this to your UK earnings to calculate your total business profits.
- Declare total profits in the self-employment section of the tax return.
- If you paid any tax in France or the US on this income, keep evidence and consider claiming Foreign Tax Credit Relief.
When to Register and File
If HMRC has asked you to complete a Self Assessment or you have not filed before, you must register by 5 October following the end of the tax year. For example, for the 2024/25 tax year (which ends on 5 April 2025), you must register by 5 October 2025.
You must file your completed tax return and pay any tax due by 31 January following the end of the tax year (for example, 31 January 2026 for the 2024/25 tax year).
Filing late or failing to report overseas income can lead to penalties and interest charges, so timely and accurate reporting is essential.
Official reference: https://www.gov.uk/self-assessment-tax-returns. Always check the latest official guidance. Related forms: Browse our form category.
Important: This article provides general information. Government rules, forms and procedures can change, and this article may not reflect the latest updates. Check current GOV.UK guidance or the relevant authority before relying on it. ITG & Co. is independent and is not affiliated with a government department.