Moving to South Africa from the UK: the 2026/27 tax guide

South Africa is not a territorial or flat-tax destination. Residents are taxed on worldwide income at progressive rates from 18% to 45%, the top rate arriving above ZAR 1,878,600 of taxable income for the year to 28 February 2027. What makes it workable is everything around the rates: personal rebates, a capital gains inclusion rate of just 40% so the effective top CGT rate is 18%, and exemptions for local interest.

But the deciding factor for your UK bill is not your SARS registration or your house in Constantia. It is the UK Statutory Residence Test (HMRC residence manual, GOV.UK), which decides, year by year, whether the UK can still tax your worldwide income. Three things have to line up: breaking UK residence under the SRT, claiming split-year treatment where you leave mid-year, and dealing properly with what stays UK-taxable regardless. Get those right and the South African position takes over.

The SRT is applied in order: first the automatic overseas tests (which make you non-resident), then the automatic UK tests (which make you resident), then the sufficient ties test if neither is conclusive. For someone taking a job in Johannesburg or Cape Town, the automatic overseas tests are the target.

• First automatic overseas test: UK resident in one or more of the previous three tax years and fewer than 16 UK days in the current year.
• Second automatic overseas test: not UK resident in any of the previous three tax years and fewer than 46 UK days.
• Third automatic overseas test (the usual route for workers): full-time work abroad across the tax year, broadly an average of at least 35 hours a week with no significant breaks, fewer than 91 UK days and no more than 30 UK workdays.

Retirees cannot use the full-time work route, so they usually fall into the sufficient ties test, which combines UK day counts with the ties you keep: family, accommodation, work, a 90-day prior-presence tie and, for recent leavers, a country tie. A leaver with several ties may be limited to as few as 15 or 45 UK days, and long summers back with family are exactly how a first non-resident year fails. Model your position with our SRT calculator at /tools/srt-calculator.

Most people do not emigrate neatly on 6 April. Where the conditions are met, split-year treatment divides the tax year into a UK part (taxed on worldwide income) and an overseas part (taxed only on UK-source income), so South African salary or pension income arising after the split date is outside UK income tax. The common gateways for leavers are starting full-time work overseas, accompanying a partner who does, and ceasing to have a UK home.

The admin is the same as for any departure. File a P85 (GOV.UK) if you will not be filing a return, and a final Self Assessment return for your year of departure if you are in the system. Split-year treatment is claimed on the SA109 residence pages, not by the P85, and the SA109 cannot be filed through HMRC's own free online service, so you will generally need software or an agent. One corridor quirk: the South African tax year runs from 1 March to the end of February, so your split UK year and first SARS year never line up, and the treaty tie-breaker often resolves the overlap months.

Becoming non-resident does not switch off UK tax on UK-source income, and because South Africa taxes residents on worldwide income, most of it also enters the South African net, with the 2002 treaty deciding who has first claim and who gives credit.

Three further UK rules deserve their own line. First, the temporary non-residence trap (HMRC capital gains manual CG26500): if you were UK resident in at least four of the seven tax years before leaving and return within five years, gains and certain income realised while abroad can be taxed in your year of return. Second, the residence-based IHT rules from 6 April 2025: after 10 of the previous 20 tax years as a UK resident, your worldwide estate stays within UK inheritance tax for up to 10 years after you leave, and South Africa's estate duty (20%, 25% above ZAR 30 million, after a ZAR 3.5 million abatement) runs alongside it. Third, voluntary National Insurance: most leavers should apply on form CF83 to keep paying Class 2 or Class 3 contributions, because a full UK State Pension is cheap to protect and expensive to rebuild, even frozen.

South Africa has two routes into residence. The primary test is ordinary residence: if South Africa is the country of your most fixed and settled home, you are resident from the day that becomes true, usually arrival for a committed emigrant. The backstop is the physical presence test: more than 91 days in South Africa in the current tax year, more than 91 days in each of the preceding five tax years and more than 915 days in aggregate across those five years. Residence ends after a continuous absence of at least 330 days, and ceasing residence triggers a deemed disposal of qualifying worldwide assets, an exit charge worth knowing about before you treat South Africa as a stepping stone.

Rates for the year to 28 February 2027 run from 18% on the first ZAR 245,100 of taxable income through five intermediate brackets to 45% above ZAR 1,878,600. Every taxpayer gets a primary rebate of ZAR 17,820, so tax only starts around ZAR 99,000 of income; secondary and tertiary rebates from 65 and 75 lift the effective threshold to roughly ZAR 153,250 and ZAR 171,300. The first ZAR 23,800 of local interest is exempt, ZAR 34,500 from 65, but the exemption covers South African interest only: interest on UK savings is foreign interest and fully taxable. Local dividends bear a 20% withholding tax and most foreign dividends, including UK ones, are taxed at an effective 20%.

Capital gains are the pleasant surprise. Only 40% of a net gain is included in taxable income, so even a top-rate taxpayer pays a maximum effective 18%, there is an annual exclusion of ZAR 50,000, and up to ZAR 3 million of gain on a primary residence is exempt. The honest boundary: Horizon advises on the UK side and coordinates with a local adviser in South Africa for SARS registrations, provisional tax and local filings. The figures above are verified against current professional summaries (PwC Worldwide Tax Summaries: South Africa), but your own South African returns belong with local counsel.

A full UK-South Africa double taxation convention is in force. It entered into force on 17 December 2002 and has had effect in the UK since 6 April 2003 for income tax and capital gains tax (in South Africa from 1 January 2003). It was amended by a 2010 protocol, in force from 13 October 2011 with the revised dividends article effective from 1 April 2012, and has since been modified by the Multilateral Instrument (GOV.UK).

The article that shapes this corridor is Article 17: pensions and other similar remuneration paid in consideration of past employment, and any annuity, paid to a resident of a Contracting State are taxable only in that State. Once you are treaty-resident in South Africa, your UK personal and occupational pensions and annuities move out of UK taxing rights altogether, and you can claim relief from HMRC so they are paid without PAYE. The exception is Article 18: pensions paid for government service stay taxable in the paying state unless you are both resident in and a national of South Africa. Articles 6 and 13 keep UK rents and UK property gains taxable in the UK as the situs state, with South Africa giving credit, and the Article 4 tie-breaker settles the crossover months created by the mismatched tax years. Treaty claims on the UK side run through the SA109 and HMRC's relief forms, and the double tax relief credit does the rest.

For retirees this corridor is unusually clean on paper. Article 17 gives South Africa sole taxing rights over your UK private and occupational pensions, South Africa taxes them at marginal rates from 18%, and the age rebates mean a 75-year-old pays nothing on roughly the first ZAR 171,300. A UK government service pension (NHS, civil service, armed forces) works the other way: it stays UK-taxable under Article 18 unless you take South African nationality.

Two cautions. The UK State Pension is payable in South Africa but frozen: annual increases only apply in the EEA, Gibraltar, Switzerland and countries with a qualifying social security agreement, and South Africa is not one of them (GOV.UK). And timing matters for any lump sum: the UK's 25% tax-free treatment is a UK rule, not a South African one, so how SARS treats a lump sum drawn after you become resident needs local advice before you press the button.

Many movers keep a UK property, and this is where the currency does the tax planning for you, or to you. The UK side is mechanical: as a non-resident you pay NRCGT on UK residential property at 18% or 24%, with rebasing that can limit the gain to growth since April 2015, and a 60-day reporting and payment deadline. On the South African side the same disposal enters the worldwide net once you are resident, at the 40% inclusion rate, with credit for the UK tax.

The gain SARS sees is measured in rand, which has spent decades depreciating against sterling, so a property whose sterling value has barely moved can still show a substantial rand gain simply because sterling buys far more rand at sale than at purchase. How the translation rules measure that gain on your numbers is one for your South African adviser before you exchange contracts. Sequencing is worth asking about early: selling before you leave keeps the sale inside your UK residence (with private residence relief where it was your home) and outside South Africa's net entirely, while selling later means two computations in two currencies and a credit claim to reconcile them.

We act for people leaving the UK every week, and this corridor rewards getting the UK exit right first: the SRT position, the split-year claim, the P85 and final return, treaty relief so UK pensions are paid gross, the NRL registration for a kept property and the 60-day NRCGT reporting when it sells. We work to fixed fees agreed upfront, coordinate with your adviser in South Africa rather than pretending to be one, and the first conversation is a free clarity call. Book a call or read about working with an expat tax adviser.