Do UK Expats Need to File a UK Tax Return?

31st October 2025

For many UK expatriates, tax obligations do not end once they move overseas. Whether or not you must complete a UK tax return depends on your UK tax residence status and any UK-sourced income or chargeable gains.

Even if you are classed as non-resident, certain types of UK income may still bring you within the UK tax system.

UK Tax Residence and Its Impact

Long-term UK residents are generally taxed on their worldwide income and gains as they arise.

However, once you become non-resident, and remain so for at least five years, your UK tax liability usually applies only to:

• UK-sourced income
• Gains from UK land and property
• Gains from assets used in a UK trade

This means expats can still face UK tax on rental income, dividends, interest, or property disposals. If any of these apply, or if you are claiming reliefs or tax refunds, you must usually file a Self Assessment tax return.

Learn more about how residency affects your tax position in our guide to the Statutory Residence Test.

When HMRC Requires a Tax Return

The UK operates a self-assessment system; you are responsible for notifying HMRC if you owe tax and for submitting your tax return on time.

According to HMRC, you must file if any of the following apply:

Self-Employment or Business

You were self-employed with income over £1,000 before expenses.

• You were a partner in a UK business.
• You were a company director (except for unpaid directors of non-profits).

Untaxed Income

You had more than £2,500 of untaxed UK income (e.g. rent, interest, or dividends).

• Your total UK taxable income was £3,000 or more.
• You or your partner earned over £60,000 and received Child Benefit.

Other Situations

• You made capital gains (e.g. sold UK property).
• You need to claim reliefs, allowances, or split-year treatment.
• You received a P800 from HMRC showing underpaid tax.

For more on what qualifies as UK income, read our article What UK Tax Allowances Do Expats Benefit From?.

Key Deadlines

If you’ve never filed before, you must register by 5 October following the end of the tax year.

Action	Deadline
Register for Self Assessment	5 October after the tax year end
File paper return	31 October after the tax year end
File online return	31 January after the tax year end
Pay tax due	31 January after the tax year end
1st Payment on Account	31 January during the tax year
2nd Payment on Account	31 July after the tax year end

Missing any of these deadlines can lead to fines and interest charges.

Late Filing and Payment Penalties

If you fail to pay or file on time:

• 5% penalty applies after 30 days, 6 months, and 12 months of non-payment.
• £100 automatic penalty for late filing, with daily penalties (£10/day) after 3 months.
• Further 5% or £300 penalties after 6 and 12 months, whichever is greater.

These penalties apply even if no tax is owed, so punctual filing is crucial.

Reporting Sales of UK Property

The Non-Resident Capital Gains Tax (NRCGT) regime applies to non-residents who dispose of:

• UK land or property (residential or commercial)
• Indirect interests in “property-rich entities” (where ≥75% of asset value derives from UK land) and you hold 25% or more of the shares
• Please note the 25% holding requirement does not apply to collective investment vehicles that are property rich entities where any holding that is disposed of could give rise to a UK tax charge

You must:

• Report within 60 days of completion
• Pay any Capital Gains Tax within 60 days

Penalties apply for late submission or payment.

Using Form R43 Instead of a Tax Return

If you are non-resident, have UK income, and do not meet Self Assessment criteria, you can claim personal allowances and a tax refund using Form R43.

The claim deadline is four years after the end of the relevant tax year.
For example, for the 2024/25 tax year, the deadline is 5 April 2029.

If you’re unsure which method applies, a UK tax adviser for expats can help you assess your situation.

Correcting a Mistake

You can amend an online tax return within 12 months of the original deadline by:

1. Logging into your HMRC account
2. Selecting the relevant tax year
3. Editing and resubmitting your return

After the 12-month window, you must write to HMRC requesting an amendment.
Overpayment relief claims can be made up to four years after the end of the tax year.

Making Tax Digital: What Expats Should Know

The UK is phasing in Making Tax Digital (MTD) for Income Tax Self Assessment.
This new system replaces annual tax returns with quarterly digital submissions.

Who it affects:

• UK residents and non-residents with qualifying UK self-employment or property income

Start dates:

• April 2026 for income over £50,000
• April 2027 for income over £30,000

You must use MTD-compatible software to record income and submit returns electronically.

Exemptions:

• Digital exclusion (age, disability, poor connectivity, or religious grounds)
• Individuals without a UK National Insurance number by the relevant date

This is wealth. Built with Wisdom.

If you’d like to discuss UK tax, wealth management, or succession planning, our advisers are here to help

Please note this is a general guide and is not advice that can be relied on. It is important that you seek specific advice for your own circumstances. 

This material is intended for both Professional and Retail Clients, as defined by the Dubai Financial Services Authority. Metis Financial Planning Limited is regulated by the Dubai Financial Services Authority.