UK Double Tax Treaty Calculator

A double tax treaty (DTA or tax convention) is a bilateral agreement between two countries that determines which country has the right to tax different types of income, and how to give relief when both countries could tax the same income.

If you pay tax in Country A on income also taxable in the UK, you can credit the Country A tax against your UK tax bill. The credit is limited to the UK tax on the same income — you cannot get a refund of excess foreign tax.

The UK has DTAs with over 130 countries including the USA, Germany, France, Australia, Canada, India, Japan, China, South Africa, UAE, and all EU member states. Full list on GOV.UK.

Many countries deduct tax at source from dividends paid to non-residents (withholding tax). DTAs often reduce this rate — e.g., the UK-US treaty caps US withholding on dividends at 15% (5% for 10%+ corporate shareholders).

HMRC provides Unilateral Relief — a credit for foreign taxes paid even without a treaty. The relief mechanism is the same but the rates may differ.

Yes. Declare foreign income on SA106 (Foreign Income pages) of your self-assessment return and claim foreign tax credit in the relevant boxes.

If you are resident in both countries under their domestic rules, the treaty's tie-breaker article determines which country you are resident in for treaty purposes, using tests like permanent home, centre of vital interests, habitual abode, and nationality.

Yes. The UK-US DTA has specific pension provisions. US Social Security benefits paid to UK residents are typically only taxable in the UK. UK State Pension paid to US residents may be taxable only in the UK.

The credit method (used by the UK) allows a credit for foreign tax paid. The exemption method (used by some countries) exempts foreign income from domestic tax entirely. The UK primarily uses the credit method.

The UK does not allow excess foreign tax credits to be carried forward in most cases. The credit is limited to UK tax on the same income in the same year.

Treaty shopping is using a low-tax jurisdiction to access beneficial treaty terms. The UK's treaties include anti-abuse provisions (Limitation on Benefits or Principal Purpose Tests) to prevent artificial treaty use.

DTAs include mutual agreement procedures (MAP) allowing the competent authorities of both countries to resolve disputes. The OECD BEPS project has strengthened dispute resolution under modern treaties.