Double Taxation Agreements

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Expert advice on the UK’s extensive double taxation agreements

Tax relief is not automatic. Double taxation agreements (also called treaties) are designed to prevent the same income or gain from being taxed twice — but they do not mean the income only needs to be declared in just one country. In many cases, you must still report the income in both jurisdictions, with the treaty determining how relief is given and which country has primary taxing rights.

If you are a UK resident receiving income or gains from overseas, or a non-UK resident earning income or disposing of assets in the UK, you may face tax liabilities in two countries at the same time. The most common types of income covered by double taxation agreements include pensions, employment, capital gains, rental, dividends and interest.

What can we do for you?

Applying the correct double taxation agreement

We identify the relevant treaty and interpret the articles that apply to your situation — whether you are UK-resident with foreign income or non-UK resident with UK-sourced income.

Support for internationally mobile individuals

We handle complex cases where income relates to multiple countries, including apportionment, remote working arrangements, residency changes, or share-based pay awarded in one country and taxed in another.

Claiming Foreign Tax Credit Relief (FTCR)

Where tax has already been paid overseas — or paid in the UK by a non-resident — we calculate the correct foreign tax credit to ensure you do not suffer double taxation.

Tax-efficient structuring and residency planning

We advise on steps that may reduce your tax exposure, such as timing of income, treaty-based exemptions, and managing residency transitions.

Determining which country has taxing rights

We explain whether the UK, the other country, or both are entitled to tax your income or gains, and how this affects your overall liability.

Ensuring accurate and compliant UK tax reporting

We prepare your UK tax return to reflect both UK domestic rules and treaty provisions, avoiding errors that may cause further issues.

What our clients say

Our clients consistently rate us highly on Trustpilot, praising our clear advice, responsive service, and personable approach. Our reviews reflect our commitment to delivering exceptional UK tax support that you can trust.

Trustpoilot

Supportive, Understanding & Reassuring

I was extremely worried with a tax problem I’d discovered and from the out José was supportive, understanding, reassuring while being very clear and straight forward. I’ve already started to use UK Tax Returns for all tax matters.

Warren (GB)

Quick, Clear Double Taxation Advice

A quick and clear report received in regard to double taxation treaty for expat living abroad.

S Watkins (Netherlands)
Super Helpful With Overseas Tax

Super satisfied! … I can 110% recommend U.K. Tax Returns. Kelly has been super helpful and has patiently explained difficult areas of U.K. taxation and how this is impacted by overseas earnings. Prompt responses and a great all-round service.

K Brace (Singapore)

Frequently Asked For Questions Double Taxation Agreements

What is a double taxation agreement?
Do I still need to report income in both countries?
How do I avoid paying tax twice?
Which country gets to tax my income?
What forms do I need for treaty relief?
How do I know if the treaty applies to me?

Why Use A Tax Advisor?

Double taxation treaties can be difficult to interpret, and small mistakes in applying them can lead to paying too much tax, claiming the wrong relief, or reporting income incorrectly in one or both countries. If a mistake in applying a double taxation treaty has been going on for some time, it can easily result in years of overpaid tax — either in the UK or overseas. Once too much tax has been withheld or incorrectly reported, recovering those amounts can be difficult, as many countries have strict time limits for reclaiming tax and may reject claims made too late.  

A tax adviser helps identify these issues early, corrects past filings where possible, and ensures the correct treaty relief is applied going forward so the problem doesn’t compound over multiple tax years.