South Africa's next interest-rate decision arrives on Tuesday, 23 September 2026 — and this one has a twist worth every home buyer's attention. Statistics South Africa will publish the August 2026 CPI on the morning of the same day the Reserve Bank's Monetary Policy Committee announces its decision, so the committee will set the repo rate with same-day inflation data in hand rather than the usual week-old print.
Does an increase in repo rate affect a home loan?
Yes — if the home loan is on a variable rate, which most South African bonds are. The South African Reserve Bank sets the repo rate, standing at 7.00% as at 11 September 2026 (SARB, Current Market Rates). Commercial banks set their prime lending rate at repo plus 3.5 percentage points — 10.50% on the same date — and most home loans are priced at prime plus or minus a margin. When the MPC moves the repo rate, banks move prime in lockstep, and a variable bond repayment follows within weeks. A fixed-rate bond does not change during its fixed period, which is exactly what a fixed rate is for.
How much will my bond repayment increase if rates go up?
The arithmetic is smaller than the anxiety. bond.co.za's own bond calculator — the same annuity formula behind our free bond calculator — puts a 25 basis point rise, from 10.50% to 10.75%, on a 20-year bond at prime like this:
| Bond amount (20 years, prime) | Monthly at 10.50% | Monthly at 10.75% | Extra per month | Extra per year |
|---|---|---|---|---|
| R1,000,000 | R9,984 | R10,152 | ~R168 | ~R2,022 |
| R1,500,000 | R14,976 | R15,228 | ~R253 | ~R3,033 |
| R2,000,000 | R19,968 | R20,305 | ~R337 | ~R4,044 |
These figures assume a bond priced exactly at prime with no margin; a profile priced at prime minus 0.5% or prime plus 1% shifts both columns by the same margin, but the difference between them stays the same for a given bond amount. Cumulatively, prime has already risen 25 basis points on 29 May 2026 (SARB, May 2026 statement). If September adds another 25, the total rise since April 2026 reaches 50 basis points — about R504 a month on a R1.5 million bond, or just over R6,000 a year, on bond.co.za's calculator numbers — the same arithmetic our rate increase impact calculator runs against any balance, at prime or a notch above it.
Why is the August inflation print landing on the same day as the rate decision?
Because that is where Stats SA's official release calendar and the SARB's MPC calendar happen to collide: CPI (August 2026, publication P0141) is scheduled for Wednesday, 23 September 2026 (Stats SA, Scheduled Publications), and the MPC announces at 15:00 the same day. The July print, released on 19 August 2026, showed headline inflation cooling to 4.3% year on year from 5.0% in June — the first slowdown in five months, with a monthly increase of just 0.2% (Stats SA, P0141 July 2026).
Direction matters as much as level. Inflation has climbed from 4.0% in April to 4.5% in May and 5.0% in June before the July pullback, and the framework is tighter than it used to be: since November 2025 the SARB has targeted a 3% point target with a 1 percentage point tolerance band, replacing the old 3–6% range — so a 4.3% print sits above the target point rather than comfortably inside a wide band. At the July meeting the MPC held the repo rate at 7.00% by a four-to-two vote, with two members preferring an immediate 25 basis point increase (SARB, July 2026 statement). Whether the same-day August print tips that split toward a hike is the whole story of 23 September.
When will the repo rate decrease in South Africa?
There is no committed date, and any page that gives you one is guessing. What is on the record: the MPC next meets on 23 September and again on 19 November 2026 (SARB calendar), and after a May hike and a split July hold, the near-term risk pointed by the committee's own votes is upward, not downward. What a buyer controls is readiness, not the vote: stress-test your affordability at prime plus one or two percent rather than today's rate, keep an instalment within roughly 30% of gross monthly income — the NCA rule of thumb banks apply — and remember that a pre-approval certificate typically holds for about 90 days (ooba and BetterBond), not indefinitely. For the daily figure, our prime rate tracker is updated whenever the SARB moves.
What to watch next
- The August CPI print on the morning of 23 September 2026, and the MPC statement at 15:00 the same day.
- Whether the July 4–2 split becomes a majority for a hike, or reverts to a hold.
- Fixed-rate pricing from the banks in the run-up to the meeting — fixed rates embed lenders’ own rate expectations.
If the August CPI prints near or above July's 4.3%, a third dissenting voice — or a 5–1 vote for a hike — becomes plausible. If it prints materially lower, the hold looks secure and the spring buying season continues at 10.50%. Either way, the rand impact on a typical bond is the table above: material over a year, manageable month to month, and knowable in advance.
Figures as at 13 September 2026. Sources: SARB Current Market Rates (repo 7.00%, prime 10.50%, 11 Sep 2026); SARB MPC statements (May 2026 hike, July 2026 hold and 4–2 vote); Stats SA P0141 CPI releases and Scheduled Publications (August CPI on 23 Sep 2026). Repayment figures are bond.co.za calculator output. Last verified: 2026-09-13.