Relocating to the United Kingdom is an exciting life change—but it also comes with a new set of tax obligations that can catch even the most well-prepared expats off guard. Whether you're moving for work, family, or retirement, understanding expat income tax in the United Kingdom is essential for staying compliant and avoiding costly surprises.
The UK tax system is well-established but layered with nuances around residency status, personal allowances, and the recently reformed rules on overseas income. In this comprehensive United Kingdom expat tax guide, we walk you through everything you need to know about income tax for the 2025/2026 tax year (6 April 2025 to 5 April 2026), so you can plan your finances with confidence.
How the UK Tax System Works: A Quick Overview for Expats
The United Kingdom operates a self-assessment and Pay As You Earn (PAYE) tax system administered by HM Revenue & Customs (HMRC). If you're employed, your employer typically deducts income tax from your salary before you receive it. If you're self-employed or have additional income streams, you'll need to file a Self Assessment tax return.
The UK tax year runs from 6 April to 5 April the following year, which is different from the calendar-year system used in many countries. For the 2025/2026 tax year, this means:
- Tax year start: 6 April 2025
- Tax year end: 5 April 2026
- Self Assessment filing deadline (online): 31 January 2027
- Self Assessment filing deadline (paper): 31 October 2026
Key things expats should know upfront:
- Income tax applies to individuals, not households.
- The UK uses a progressive tax rate system with multiple bands.
- Your tax residency status determines how much of your worldwide income is taxable.
- Scotland has its own income tax rates, which differ from the rest of the UK.
Determining Your UK Tax Residency Status
One of the most critical steps when moving to the United Kingdom for taxes is establishing your residency status. Your residency determines whether you're taxed only on UK-sourced income or on your worldwide income.
The Statutory Residence Test (SRT)
Since April 2013, the UK has used the Statutory Residence Test (SRT) to determine tax residency. The SRT involves three main tests, applied in order:
Automatic Overseas Test: You are automatically non-resident if you:
- Were resident in the UK in none of the previous three tax years and spend fewer than 46 days in the UK in the current tax year.
- Were resident in the UK in one or more of the previous three tax years and spend fewer than 16 days in the UK.
- Work full-time overseas with fewer than 91 days spent in the UK (and no more than 30 working days in the UK).
Automatic UK Test: You are automatically UK resident if you:
- Spend 183 days or more in the UK in the tax year.
- Have your only home in the UK for at least 91 consecutive days (with at least 30 of those days falling in the tax year in question).
- Work full-time in the UK for any period of 365 days.
Sufficient Ties Test: If neither automatic test applies, your residency is determined by a combination of days spent in the UK and the number of connecting factors (ties) you have, such as:
- Having a UK resident family (spouse/civil partner or minor children)
- Having accessible accommodation in the UK
- Doing substantive work in the UK
- Spending 90+ days in the UK in either of the two previous tax years
- Spending more days in the UK than in any other single country (for those who were UK resident in at least one of the three prior tax years)
Why Residency Matters
- UK residents are taxed on their worldwide income (subject to the new rules replacing the remittance basis—see below).
- Non-residents are generally only taxed on UK-sourced income, such as UK employment income, UK rental income, and UK pensions.
Common Mistake: Many expats assume that simply maintaining a home in another country makes them non-resident in the UK. The SRT is far more complex than that. Carefully tracking your days in the UK is essential.
UK Income Tax Rates and Bands for 2025/2026
The UK applies progressive income tax rates, meaning different portions of your income are taxed at different rates. Here are the income tax bands for the 2025/2026 tax year for England, Wales, and Northern Ireland:
England, Wales, and Northern Ireland
| Band | Taxable Income | Tax Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Basic Rate | £12,571 – £50,270 | 20% |
| Higher Rate | £50,271 – £125,140 | 40% |
| Additional Rate | Over £125,140 | 45% |
Scotland (Scottish Income Tax Rates)
If you live in Scotland, you'll pay Scottish income tax rates, which differ significantly:
| Band | Taxable Income | Tax Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Starter Rate | £12,571 – £14,876 | 19% |
| Basic Rate | £14,877 – £26,561 | 20% |
| Intermediate Rate | £26,562 – £43,662 | 21% |
| Higher Rate | £43,663 – £75,000 | 42% |
| Advanced Rate | £75,001 – £125,140 | 45% |
| Top Rate | Over £125,140 | 48% |
Key Points About the Personal Allowance
- The Personal Allowance of £12,570 is the amount of income you can earn tax-free.
- The Personal Allowance is reduced by £1 for every £2 you earn over £100,000, meaning it is completely eliminated once your income exceeds £125,140.
- Most expats arriving in the UK are entitled to the full Personal Allowance, though the rules vary for non-residents from countries without a qualifying tax treaty.
Practical Example
Suppose you move to England and earn a salary of £65,000 in the 2025/2026 tax year. Here's how your income tax would be calculated:
- £12,570 at 0% = £0
- £37,700 (from £12,571 to £50,270) at 20% = £7,540
- £14,730 (from £50,271 to £65,000) at 40% = £5,892
- Total income tax = £13,432
Want to quickly calculate your own tax liability? Use our United Kingdom Income Tax Calculator to get an instant estimate based on your salary and circumstances.
The End of the Remittance Basis: New Rules for Foreign Income (2025/2026)
Historically, the UK offered a generous remittance basis of taxation for non-domiciled individuals ("non-doms"). Under this system, non-doms could choose to be taxed only on foreign income and gains that they brought ("remitted") into the UK, rather than on their entire worldwide income.
What Changed from 6 April 2025?
The remittance basis was abolished from 6 April 2025. It has been replaced with a new four-year Foreign Income and Gains (FIG) regime. Here's what expats need to know:
- New arrivals to the UK (individuals who have been non-UK tax resident for the previous 10 consecutive tax years) can elect to use the FIG regime.
- Under the FIG regime, qualifying individuals pay no UK tax on foreign income and gains for their first four tax years of UK residence.
- After the four-year period ends, you will be taxed on your worldwide income just like any other UK resident.
- There is no remittance basis charge under the new regime (previously, long-term non-doms had to pay annual charges of £30,000 or £60,000).
- The FIG regime applies on a year-by-year election basis—you can choose whether to use it each year.
Important Caveats
- If you elect into the FIG regime in a given year, you lose your Personal Allowance and your Capital Gains Tax annual exempt amount for that year.
- UK-sourced income remains fully taxable regardless of your FIG election.
- Transitional rules exist for individuals who were previously claiming the remittance basis before 6 April 2025. These include a Temporary Repatriation Facility (TRF) allowing previously unremitted foreign income to be brought to the UK at a reduced tax rate of 12% (in 2025/2026).
Key Takeaway for Expats: If you're moving to the UK for the first time and have significant overseas income or investments, the new FIG regime can provide substantial tax relief for your first four years. However, the trade-off of losing your Personal Allowance means it's not always beneficial—especially if your foreign income is modest.
National Insurance Contributions: The "Other" Tax Expats Forget
Income tax isn't the only deduction from your pay in the UK. National Insurance Contributions (NICs) are a separate, compulsory charge that funds the state pension and certain benefits. Many expats overlook NICs, but they can significantly impact your take-home pay.
Employee NIC Rates for 2025/2026
| Earnings Band | Rate |
|---|---|
| Up to £12,570 per year (Primary Threshold) | 0% |
| £12,571 – £50,270 per year | 8% |
| Over £50,270 per year | 2% |
Employer NIC Rates for 2025/2026
Employers pay NICs at 15% on employee earnings above £5,000 per year (the Secondary Threshold). While this doesn't come out of your salary directly, it affects overall employment costs and can be relevant if you're self-employed or running a business.
Self-Employed NICs
If you're self-employed in the UK:
- Class 2 NICs: Voluntary contributions of £3.45 per week (these build your state pension entitlement).
- Class 4 NICs: 6% on profits between £12,570 and £50,270, plus 2% on profits above £50,270.
Social Security Agreements
The UK has bilateral social security agreements with many countries (including the USA, Canada, Australia, and all EU/EEA nations). These agreements can:
- Prevent you from paying social security in both countries simultaneously.
- Allow you to count contribution periods in other countries toward your UK state pension.
- Require you to obtain a certificate of coverage (such as an A1 form for EU postings) to prove which country's system you're paying into.
Double Taxation Agreements and Claiming Relief
One of the biggest concerns for expats is being taxed on the same income in two countries. Fortunately, the UK has one of the world's largest networks of Double Taxation Agreements (DTAs), with treaties covering over 130 countries.
How DTAs Protect Expats
Double Taxation Agreements typically work in two ways:
- Exemption Method: One country gives up its right to tax certain types of income entirely.
- Credit Method: You pay tax in both countries, but the country of residence gives you a tax credit for the tax already paid in the other country, so you're not taxed twice.
In most UK DTAs, the credit method is used for employment income. This means:
- You pay tax in the country where you work.
- If you're UK resident, you declare the foreign income on your UK return and claim a Foreign Tax Credit for the overseas tax paid.
- You only pay the difference if UK tax is higher.
Practical Example
Suppose you're a UK tax resident who also receives rental income from a property in Germany. Germany taxes the rental income at 25%, and the UK would tax it at your marginal rate of 40%. Under the UK-Germany DTA:
- You pay 25% tax in Germany.
- You declare the income on your UK Self Assessment return.
- You claim a Foreign Tax Credit of 25%.
- You pay the remaining 15% (40% minus 25%) to HMRC.
Countries Without a DTA
If you have income from a country that doesn't have a DTA with the UK, you may still be able to claim unilateral relief under UK domestic law, which works similarly to a tax credit.
Key Filing Deadlines and Practical Steps for Expats
Staying on top of your UK tax obligations is crucial to avoid penalties. Here's a step-by-step guide for expats:
Step 1: Register with HMRC
- If you're employed, your employer handles PAYE registration.
- If you're self-employed or have additional income, you need to register for Self Assessment with HMRC. You can do this online.
- You'll receive a Unique Taxpayer Reference (UTR) number.
Step 2: Obtain a National Insurance Number
- You'll need a National Insurance (NI) number to work legally in the UK. Apply through the Department for Work and Pensions (DWP) or, in some cases, through your visa application process.
Step 3: Track Your Days in the UK
- Keep a detailed record of your travel in and out of the UK. This is essential for the Statutory Residence Test and any future residency disputes with HMRC.
Step 4: File Your Self Assessment Tax Return
Key deadlines for the 2025/2026 tax year:
| Deadline | Date |
|---|---|
| Tax year ends | 5 April 2026 |
| Register for Self Assessment (if new) | By 5 October 2026 |
| Paper return deadline | 31 October 2026 |
| Online return deadline | 31 January 2027 |
| Payment of tax owed | 31 January 2027 |
| Second payment on account (if applicable) | 31 July 2027 |
Step 5: Report Foreign Income and Assets
- All UK residents must declare worldwide income on their Self Assessment return (unless claiming the FIG regime for qualifying foreign income).
- You may also have reporting obligations in your home country. US citizens and Green Card holders, for example, must continue to file US tax returns regardless of where they live.
Common Mistake: Failing to report overseas bank interest, foreign pensions, or rental income from property abroad. HMRC participates in the Common Reporting Standard (CRS) and FATCA, meaning it receives financial data from over 100 countries automatically. Non-disclosure can result in significant penalties.
Frequently Asked Questions About UK Expat Income Tax
Do I have to pay UK tax if I'm still paying tax in my home country?
Possibly. If you're a UK tax resident, you're liable on your worldwide income. However, a Double Taxation Agreement between the UK and your home country should prevent you from being taxed twice on the same income. You'll typically receive a credit for taxes paid abroad.
Can I still get the UK Personal Allowance as a non-resident?
It depends. UK nationals and citizens of countries with a qualifying tax treaty (including all EEA countries) retain their Personal Allowance as non-residents. Others may lose it.
What happens if I arrive or leave the UK partway through the tax year?
The UK allows split-year treatment in certain circumstances. This means you're only taxed as a UK resident for the part of the year you were actually living in the UK, rather than the entire tax year. Specific conditions must be met—there are eight possible "cases" under which split-year treatment can apply.
Is my overseas pension taxed in the UK?
Generally, yes. If you're UK resident, foreign pension income is taxable. However, the specific DTA between the UK and the country paying the pension may allocate taxing rights differently. Some treaties allow only the source country to tax pension income.
How do I calculate my UK income tax quickly?
Use our United Kingdom Income Tax Calculator to get an instant estimate of your tax liability based on your income and residency status for the 2025/2026 tax year.
Conclusion: Plan Early, Stay Compliant
Moving to the United Kingdom as an expat opens up incredible opportunities—but the UK tax system demands your attention from day one. Here are the key takeaways:
- Determine your residency status using the Statutory Residence Test as soon as you arrive. This is the foundation of your UK tax obligations.
- Understand the new FIG regime that replaced the remittance basis from April 2025. If you qualify, it could shelter your foreign income for up to four years.
- Know your tax bands and calculate your liability accurately. Use our United Kingdom Income Tax Calculator for a quick estimate.
- Don't forget National Insurance Contributions—they're separate from income tax and apply to most workers.
- Leverage Double Taxation Agreements to avoid paying tax twice on the same income.
- File on time and report all worldwide income. HMRC's access to international financial data means non-disclosure is increasingly risky.
- Keep meticulous records of your travel, income sources, and tax payments in all countries.
The UK tax landscape for expats has changed significantly in 2025, particularly with the abolition of the remittance basis. Whether the new rules benefit or complicate your situation depends entirely on your personal circumstances. Getting professional advice early can save you thousands of pounds and considerable stress down the line.
This article is for informational purposes only and does not constitute tax advice. Tax laws change frequently; consult a qualified tax professional for advice specific to your situation.