Come back to the UK and your tax residence restarts for the whole tax year you return in, not from the date you land. Split year treatment fixes that, so your foreign income is taxed only from the date the UK part begins, and most returning doctors meet case 6, ceasing full-time work overseas, or case 5, starting full-time work in the UK. You file a Self Assessment return with the residence pages, which HMRC's free online service will not take, so it is commercial software or paper by 31 October. Earnings for duties done abroad before the split date stay out of the UK charge, and treaty rules may apply where the other country taxed them. You rejoin the NHS pension through your employer, with no backdating, and if private or locum work starts you register for Self Assessment by 5 October after that tax year ends.
When does UK tax residence actually restart?
On 6 April of the tax year in which you meet the test, because the statutory residence test in Schedule 45 to the Finance Act 2013 works a whole tax year at a time. You are UK resident for the year if you meet an automatic UK test, or if you fail the automatic overseas tests and have enough UK ties for your days here.
Three automatic UK tests catch most returning doctors: 183 days or more here in the tax year, sufficient UK working hours over a 365-day period with no significant break, which a full-time NHS post satisfies comfortably, and having your only home here for a qualifying period. Any one is enough, so the date you flew back settles nothing by itself: it decides which split year case you meet, and the case decides when the UK part starts.
Which split year case does a returning doctor usually meet?
Case 6 or case 5. The eight cases sit in Part 3 of Schedule 45, and cases 4 to 8 are the arrival cases.
- Case 6, ceasing full-time work overseas. You were non-resident last year because you met the third automatic overseas test, you were UK resident in one or more of the 4 years before that, and you are UK resident next year. The classic shape for a doctor who went abroad to work and has come home.
- Case 5, starting full-time work in the UK. You were non-resident last year and a 365-day period of sufficient UK working hours starts in this one, which fits a return straight into a substantive post.
- Case 4 and case 8, starting to have a home in the UK. Both turn on housing, not work.
More than one case can apply, and the legislation sets the priority: case 6 generally wins unless case 5 gives an earlier split year date, and otherwise the earliest date wins. One condition catches people out. If you were abroad for less than a full tax year, split year treatment is generally not available, so the whole year is taxed as a resident year.
What do you file for the year you return?
A Self Assessment return with the residence pages, plus whichever other pages your income needs.
| What happened in the year | What goes on the return |
|---|---|
| Split year claimed | The residence pages, with the case and the split date |
| Foreign income in the UK part | The foreign pages, with relief for tax paid abroad |
| Private or locum work started | The self-employment pages, with Class 4 |
| NHS post only, after the split date | The employment pages, PAYE already deducted |
| Claiming the 4-year foreign income and gains regime | The claim on the residence pages |
The trap is the filing route. HMRC's free online service does not handle a return for someone who lived abroad as a non-resident during the year, so you need commercial software or paper, and the paper deadline is 31 October against 31 January online. Our guide to Self Assessment for doctors and GPs covers the payments on account that follow.
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Is your overseas income taxed here in the year of return?
Only from the split date onwards. In the UK part you are taxed as a resident, which normally means on worldwide income; in the overseas part, only on UK source income. Foreign pension income, overseas rents and investment income arising in the UK part are reportable here. Where the other country has taxed the same income, treaty rules may apply, and relief is worked out on the return rather than assumed. Contributions to an overseas pension scheme while abroad are a separate question from your NHS benefits and do not create UK relief by default.
If you were non-resident for at least 10 consecutive tax years, the 4-year foreign income and gains regime is worth pricing. It replaced the remittance basis on 6 April 2025, runs for your first 4 years of UK residence, and is claimed on the return. The cost is real: it removes the tax-free allowances for income tax and capital gains tax, and foreign employment earnings are not covered.
What happens to the NHS pension and your National Insurance record?
You rejoin through your employer, and nothing is backdated. You can rejoin at any time up to age 75, and everyone joining or rejoining from 1 April 2023 builds up benefits in the 2015 Scheme. You apply in writing to your employer, the employer submits the joiner form, and membership restarts from the first day of the pay period after they receive it. You cannot rejoin while absent from work, and rejoining does not restore service you took a refund for. The detail sits in our guide on opting out of the NHS Pension Scheme and rejoining.
Your National Insurance record is the part people find late. Years spent living or working outside the UK commonly leave gaps, and gaps cut the qualifying years counting towards your State Pension. Voluntary contributions can normally only be paid for the past 6 years, with a 5 April deadline each year, so a long posting abroad can put the earliest years out of reach. Check the record early.
What if private or locum work starts when you get back?
The date to work to is the 5 October after the close of the tax year containing your first paid session. Locum or private profit is stacked on your NHS pay and taxed at your marginal rate, with Class 4 National Insurance at 6% between £12,570 and £50,270 and 2% above. Class 2 is no longer a required payment, and payments on account begin once the bill passes £1,000 with less than 80% collected at source. Our locum filing guide sets out how the pages are completed, and the complete locum tax guide covers expenses and the pension forms.
Take it in order. Fix the residence position and the split date first, because it decides which pages you file and which income is in scope. Then register for anything new, and check the pension and National Insurance record while the years abroad are inside the 6-year window. Have the residence position checked by an accountant who has handled returning doctors before the pages go in, because the case and the date have to hold up against your day counts.