UK Tax Rules for Expats: What You Need to Know When Living Abroad

Boarding a plane to a new country does not cancel your relationship with HMRC. Britain still taxes income that arises within its borders, and a growing list of rules now reaches expats who thought they had left the system behind. A rented flat in Leeds, a workplace pension, or a forgotten savings account can all keep you on the tax radar for years.

Getting expert help from established UK Tax Services often saves expats more than it costs, because the rules depend on your residence status, your income sources, and the treaty between Britain and your new home. This guide explains which income stays taxable, which allowances you can claim, how pensions and National Insurance work from abroad, and what changed for the 2026/27 tax year.

Start With Your Residence Status

Why Residence Controls Everything

Your liability depends on whether HMRC treats you as UK resident for a given tax year. Residents pay tax on worldwide income, while non-residents generally pay only on UK-source income. The Statutory Residence Test decides your status through day counts and personal ties to Britain, so keep travel records from the first day of each tax year.

Telling HMRC You Have Left

Report your departure so HMRC can update your records and tax code. You can use form P85 for this, and the process often unlocks refunds of overpaid tax from the year you left. Skipping this step leaves your employer or pension provider applying the wrong code.

What UK Income Remains Taxable

Non-residents still pay UK tax on wages for work done in the UK, rental income, and gains on UK property. Other categories behave differently, so the comparison below helps: 

• Usually taxable in the UK: UK employment earnings, rental profits from UK property, UK private and workplace pensions (subject to treaty), and gains on UK residential property.
• Often not taxed in the UK: The State Pension, which non-residents do not usually pay UK tax on, plus much UK bank interest and some dividends, depending on the disregarded income rules and the claims you make. 

Treat this list as a starting point. Your own circumstances and the relevant double taxation agreement can change the answer.

Personal Allowance for Non-Residents

You may still claim the tax-free allowance after you leave. The personal allowance is £12,570 for 2026/27, and it applies to British citizens and EEA or Swiss nationals who live abroad. The allowance stays frozen at that level until April 2031, so inflation steadily erodes its value. Nationals of other countries may qualify through a treaty clause, so check the agreement with your country of residence before you assume anything. 

Renting Out Your UK Home

The Non-Resident Landlord Scheme

Under the Non-resident Landlord Scheme, your letting agent or tenant deducts basic rate tax from the rent after allowable expenses. You can apply to HMRC to receive rent gross, provided your tax affairs are up to date. Even then, you still report the profit on a Self Assessment return. 

Upcoming Rate Changes

Property income is due to move onto its own set of tax rates from April 2027, which will raise the bill for many non-resident landlords. Confirm the final rates on GOV.UK, since Budget announcements may adjust them. Landlords should model their expected profit now rather than wait for the new tax year.

Selling UK Property From Abroad

Non-residents pay capital gains tax on UK property. You must report a UK residential property sale within 60 days of completion, even when no tax is due. Late reporting triggers penalties, and the deadline arrives faster than most sellers expect. Gather your purchase price, improvement costs, and sale documents before you exchange contracts. 

Pensions and National Insurance Abroad

Pensions

UK private pensions generally remain taxable in Britain, although a treaty may shift the taxing right to your new country. Request a tax code from HMRC when you retire abroad, since this can prevent overpayment at source. State Pension payments are usually paid gross, but your new country may tax them.

Voluntary Contributions Now Cost More

A major change took effect in April 2026. Voluntary Class 2 National Insurance is no longer available for periods spent abroad, so the only route is voluntary Class 3 contributions, which cost substantially more per week. You usually need ten qualifying years on your record to receive any State Pension, and thirty-five for the full amount. Check your forecast on GOV.UK before you commit money to gap-filling. 

Avoiding Double Taxation

Treaties and Tie-Breaker Rules

Britain holds double taxation agreements with over 130 jurisdictions. When two countries claim you as resident, the treaty applies tie-breaker tests based on your permanent home, your centre of vital interests, and your habitual abode.

Foreign Tax Credits

Where a treaty does not remove tax completely, you can usually claim credit for foreign tax paid against the UK liability on the same income. Keep certificates of tax paid, since HMRC may ask for proof.

Records Worth Keeping

Hold onto residence evidence, rental statements, pension payment advice, and foreign tax receipts for at least five years after the filing deadline.

Planning Your Next Steps Abroad

Living overseas simplifies some tax matters and complicates others. Confirm your residence status each year, report UK income correctly, claim the allowances available to you, and review the cost of protecting your State Pension. If you own UK property or receive UK pensions, plan for the 2027 changes now. Rules and thresholds change often, so verify current figures on GOV.UK and consult a qualified adviser before you make major decisions about selling, renting, or retiring abroad.