Working abroad tax in one paragraph: if you take a full-time job abroad and meet the SRT automatic overseas test 3 (full-time work + <91 days UK + <30 UK work days), you become non-UK-resident for the tax year. Your overseas employment income is then NOT UK-taxable. Your UK-source income (property, UK work, UK self-employment) remains taxable. Double-tax treaties between the UK and most countries allocate taxing rights to avoid double taxation. Split-year treatment may apply for the year of departure / return, allowing partial treatment.
Before you leave — UK position
Pre-departure checklist:
- Calculate your departure-year residency. Use SRT to determine whether the year of departure will be split or full-year UK-resident.
- P85 form to HMRC. Tell HMRC you're leaving so they can finalise PAYE and arrange for any refund.
- NRL scheme registration if you'll have UK rental property after leaving.
- NI position. Class 3 voluntary contributions may be worth continuing for State Pension qualifying years.
- Pension contributions. You can usually continue to UK pension as a non-resident, but only with tax relief up to £3,600 gross per year unless you have UK earnings.
- ISA contributions. Non-residents cannot make new ISA subscriptions. Existing ISAs continue to grow tax-free in the UK but you may face tax in your new country of residence.
The full-time-work-abroad test
SRT Automatic Overseas Test 3 makes you non-resident if you meet ALL of:
- You work "full-time" overseas in the tax year — average 35+ hours per week (HMRC's definition), reasonably continuously
- No "significant break" in the work (no period of 31+ days without work, with limited exceptions for annual leave)
- You spend fewer than 91 days in the UK during the year
- You work no more than 30 days in the UK during the year (work day = 3+ hours)
This is the cleanest route to non-residency. Maintaining it means:
- Track your UK days carefully (boarding passes, accommodation evidence)
- Don't accept UK work assignments above the 30-day threshold
- Don't take long career breaks in the UK
- Watch for "spousal accompaniment" rules if your spouse is also relocating
Treaty relief — avoiding double taxation
The UK has double-tax treaties with most countries. Each treaty allocates taxing rights:
- Employment income: typically taxed in the country where the work is performed (with exceptions for short-term visits)
- Dividends: usually taxable in the country of residence, with the source country withholding at treaty rates (often 10-15%)
- Interest: similar to dividends, source country withholding limited by treaty
- Property income: always taxable in the country where the property is located
- Capital gains: varies by treaty; UK property always UK-taxable
- Pensions: varies by treaty; some give residence country exclusive rights, others share
If you've paid tax in both countries on the same income, you typically claim credit for foreign tax against your home-country liability. The credit can't exceed the home-country tax on the same income (no refund of excess foreign tax via treaty).
UK-source income while non-resident
Even as a non-resident, you remain liable to UK tax on certain UK-source income:
| Income | Liability |
|---|---|
| UK rental property | 20% basic-rate via NRL or SA |
| UK employment days | Pro-rata UK tax on UK work days portion |
| UK self-employment | Full UK tax |
| UK property capital gains | NRCGT at 18/24% |
| UK bank interest (small amounts) | "Disregarded income" — usually exempt |
| UK dividends (small amounts) | "Disregarded income" — usually exempt |
| UK state pension | Taxable in UK (treaty may override) |
| UK occupational pensions | Treaty-dependent — often taxable in country of residence |
The "disregarded income" rule is a useful trap-saver: non-residents can elect to have UK savings and dividend income disregarded, so it's not UK-taxable. However, this election can also mean losing the UK Personal Allowance against UK rental and other income — analyse before electing.
Pension contributions when abroad
Three pension scenarios:
1. New UK pension contributions while non-resident
- You can contribute to a UK personal pension or SIPP up to £3,600 gross per year and get tax relief
- This is the "Relevant UK Earnings of £0" treatment — minimum tax-relieved contribution
- Without UK earnings, you cannot contribute more than £3,600 gross with tax relief
2. UK pension contributions if you have UK earnings
- If you still have UK-taxable income (e.g., UK rental, UK consultancy days), you can contribute up to 100% of those earnings (capped at £60,000 AA)
3. Continuing employer pension contributions
- If your overseas employer offers a pension scheme, that's usually the most appropriate vehicle
- UK domicile rules can affect IHT treatment of overseas pensions on death
NI contributions when abroad
National Insurance position when working abroad:
- Within first 52 weeks abroad: may continue paying UK Class 1 NI (employee/employer arrangement)
- EEA / countries with social security agreements: follow the relevant agreement — typically you contribute to one country's system only
- Rest of world without agreement: can voluntarily continue UK Class 2 (for self-employed) or Class 3 (anyone) to maintain State Pension qualifying years
- Class 3 cost 2026/27: £956.80 per year for 52 weeks = £342/year of pension uplift, payback ~2.7 years
For most expatriates planning eventual UK return, continuing Class 3 contributions is the best decision they make.
Common working-abroad mistakes
- Not meeting the full-time work test. Long career break or part-time work compromises automatic overseas treatment.
- Exceeding UK day count. 91 days = automatic UK-resident under Test 3 failure.
- Forgetting NRL scheme on UK rentals. Letting agents must register; tenants may need to.
- Not filing UK Self Assessment. NRLs and others with UK-source income must continue annual SA.
- Ignoring NI continuation. 3-5 years abroad without Class 3 contributions can leave a permanent State Pension gap.
- Assuming dual tax = double taxation. Treaty relief usually eliminates double taxation — but you must claim it.
- Underreporting UK property gains. NRCGT 60-day reporting is mandatory.
Sources
Related foreign income content
How UK Tax Drag holds itself to account
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