In brief (TL;DR): Selling South African property as a UK resident triggers Capital Gains Tax and withholding tax rules. We manage the tax clearances and repatriation of your property proceeds, securing the
AIT to release your funds to the UK.
Many expats settle in the UK, rent out their South African properties for a few years, and only decide to sell when they're ready to permanently establish their roots in Britain. If you're living in Berkshire but selling a family home in Camps Bay or a townhouse in Sandton, moving those property proceeds to the UK involves a complex web of South African tax rules.
As an expat, you may be classified as a non-resident for tax purposes in South Africa. This classification fundamentally changes how a property transaction is handled by conveyancing attorneys and the South African Revenue Service (SARS).
The non-resident withholding tax (Section 35A)
The biggest shock for expats selling property back home is the application of Section 35A of the Income Tax Act. If you're a non-resident and you sell a South African property for more than R2 million, the buyer's conveyancing attorney is legally obliged to withhold a percentage of the sale price.
This withholding tax is calculated at:
- 7.5% for natural persons (individuals)
- 10% for companies
- 15% for trusts
The withheld amount must be paid to SARS within 14 days. It acts as an advance payment toward your final Capital Gains Tax (CGT) liability, not an additional tax.
Unlocking the withheld funds
The withheld amount is not your final tax bill. Once your actual CGT liability is calculated during your annual tax return (or via a specific tax directive applied for before the transfer), you may be entitled to a refund if the withheld amount exceeds your actual tax debt.
Getting the balance of your property proceeds out of South Africa requires another critical step: the Approval for International Transfer (AIT).
Because you're moving funds out of the country as a non-resident (or using your Foreign Investment Allowance if you still retain tax residency), you must apply to SARS for an AIT. This requires submitting the final conveyancer's account, proof of the property sale, and a clean tax compliance history.
A word from Adele: "Expats are often deeply frustrated when conveyancers hold back their property proceeds, locking their money in South Africa. We work proactively with our clients to make sure their tax affairs are aligned. By managing the AIT application while the property is still in transfer, we secure the necessary clearances to release the funds the moment the conveyancer is cleared to pay out."
UK HMRC implications
Don't forget that HM Revenue & Customs (HMRC) may also have a claim. As a UK resident, you're taxed on your worldwide income and gains. While the SA-UK Double Taxation Agreement (DTA) makes sure you won't be taxed twice on the same gain, you still have a legal obligation to report the South African property sale on your UK Self Assessment tax return.
The UK CGT calculation runs separately from the SA one. The UK looks at the gain in Sterling terms (Sterling acquisition cost versus Sterling disposal proceeds, both translated at the rates applicable on the relevant dates). The SA calculation is done in Rand. The two figures rarely match exactly - currency movement between purchase and sale changes the Sterling gain even when the Rand gain is fixed.
Where the SA CGT is paid first (which is the usual sequence given the Section 35A withholding), HMRC gives a foreign tax credit against the UK CGT bill for the SA tax already settled. You don't pay tax twice; you pay the higher of the two, with the lower already deducted at source.
A worked example: a R6 million Cape Town property sale
A typical scenario: an SA expat now living in Berkshire is selling their Camps Bay flat for R6 million. They bought it in 2014 for R2 million. They've been UK tax resident since 2021 and never formally ceased their SA tax residency - so technically they remain an SA tax resident, which keeps their FIA and AIT routes available.
The numbers run roughly as follows. Sale price R6 million. Original cost R2 million. Improvements and selling costs taken at R200,000. SA capital gain R3.8 million. The inclusion rate for individuals is 40%, so R1.52 million is added to taxable income. At a typical marginal rate of 45% (the top SA bracket), the SA CGT bill is around R684,000.
Section 35A applies because the price is above R2 million and the seller is non-resident-status-adjacent. The conveyancer withholds 7.5% (R450,000) and remits it to SARS within 14 days of registration. Because the actual CGT bill is higher than the withheld amount, the seller owes an additional R234,000 on their annual return.
After bond settlement, agent fees, and the Section 35A withholding, the conveyancer is sitting on approximately R5.1 million ready to be released. The AIT application has been running in parallel and is cleared. The R5.1 million flows out under FIA (since the seller is still an SA tax resident - they have R10 million annual headroom plus the R2 million SDA). At an indicative rate of R23 to the pound, the converted amount is around £222,000.
On the UK side, the seller declares the sale on their Self Assessment, calculates the Sterling-denominated gain, claims foreign tax credit for the SA CGT already paid, and tops up any UK CGT shortfall. End to end from registration to UK funds usable: about six to ten weeks.
The mistakes expats make
A few patterns:
- Waiting until after the sale to start the AIT. The Section 35A withholding will happen automatically; the conveyancer is legally required to do it. But getting the balance of the funds out of SA without an AIT is impossible. Starting the application while the property is still in transfer typically saves four to six weeks of "trapped capital" once the sale completes.
- Assuming the primary residence exclusion still applies. The R2 million CGT exclusion on the gain from a primary residence only applies if the property actually was your primary residence at relevant times. If you've been renting it out for several years and living in the UK, the exclusion may not be available, or only partially. Worth checking before banking on it.
- Underestimating the difference between SA and UK CGT calculations. Currency movement between your original purchase and the eventual sale means the Sterling gain can be meaningfully different from the Rand gain - sometimes higher, sometimes lower. Both calculations need to be done; foreign tax credit handles the overlap.
- Forgetting the UK reporting deadline. UK CGT on residential property historically required reporting within 60 days of completion under the "UK Property Account" rules, although those rules apply to UK property - not SA property. For SA property, the disposal goes onto your annual Self Assessment, but the calculation and supporting documents need to be assembled in time for the deadline. Don't leave it to the last week of January.
- Defaulting to your SA conveyancer's bank for the conversion. The conveyancer's role is to handle the legal transfer; they're not a forex specialist. Routing R5 million through their default banking relationship usually means a retail spread on the conversion. A specialist provider handles the same flow at a commercial rate with a flat R250 SWIFT fee.
Edge cases worth knowing
If you've formally ceased your SA tax residency (cessation of SA tax residency completed and confirmed), you no longer have access to the FIA route, but the AIT process for non-residents is similar in shape. Section 35A withholding still applies, the supporting pack is similar, and the funds still need a route out. Our piece on selling your SA home after emigrating covers the post-cessation angle in more depth.
If the property was held jointly with a spouse, each spouse's CGT position is calculated separately on their half-share. Each spouse's AIT is also separate. Two AIT applications, two CGT computations, two transfers - but each spouse gets their own full SDA and FIA capacity, so the combined transfer capacity is meaningful.
If the property is sold via a SA company structure rather than personal ownership, the CGT and exchange-control mechanics differ significantly. Corporate disposals run through the company's tax position, with separate rules on capital reduction or dividend treatment depending on how the proceeds are extracted to the individual.
For the practical mechanics of physically moving the proceeds across once the AIT is cleared, our piece on transferring Rands to buy a UK home covers the receiving side of the corridor (relevant if you're using the proceeds to buy UK property).
Your next steps
If you've accepted an offer on your South African property, don't wait until the transfer is registered to start your forex compliance. Contact WBForex to prepare your SARS AIT application and arrange a competitive transfer rate for your proceeds.
FAQ
How is CGT calculated when I sell my SA property as a UK resident?
SA CGT is calculated in Rand using your original cost base, improvements, selling costs, and the sale price. The capital gain (after the annual exclusion) is multiplied by the 40% individual inclusion rate and added to your taxable income. UK CGT is calculated separately in Sterling. Foreign tax credit prevents double taxation, but both calculations need to be done.
Can I claim the primary residence exclusion if I haven't lived in the SA property for years?
The R2 million primary residence exclusion applies only to the period the property genuinely served as your primary residence. If you've been UK-resident for several years and renting the SA property out, the exclusion may be reduced proportionately or unavailable. Worth getting a SA tax adviser to calculate this exactly rather than assuming the full R2 million applies.
What's the Section 35A withholding rate and when do I get it back?
For natural persons (individuals) selling SA property as non-residents at above R2 million, the rate is 7.5% of the gross sale price. The conveyancer pays it to SARS within 14 days of registration. It's a prepayment of your final CGT liability, not an extra tax. If your actual CGT bill is lower than the withheld amount, you can claim a refund on your annual return.
Do I have to declare the SA property sale on my UK tax return?
Yes. As a UK tax resident you're taxed on worldwide gains, including from SA property. The disposal goes onto your Self Assessment for the relevant year. The Double Taxation Agreement ensures you get credit for the SA CGT paid, but you still have to report the transaction.
Can I use my FIA to repatriate the proceeds if I'm still an SA tax resident?
Yes. If you're still classified as an SA tax resident (typically the case if you haven't formally ceased), your R2 million SDA and R10 million FIA are available. Repatriating R5-6 million of property proceeds fits comfortably inside the combined ceiling. The AIT is still required for the FIA portion; the SDA portion doesn't need clearance.
