On 23 September 2026 the South African Reserve Bank's Monetary Policy Committee (MPC) will announce its next interest rate decision — at 15:00 SAST. For anyone with a bond, or planning to apply for one, it is one of the most consequential dates left on the 2026 economic calendar. Here is the honest position: nobody outside the MPC knows what it will do, but the range of credible outcomes is now clear, and 25 basis points either way is a manageable number if you plan for it rather than around it.
Where rates stand now
The repo rate is 7.00% and the prime lending rate — the benchmark your bond repayment is built on — is 10.50%. Both have been there since the MPC's May 2026 meeting, when the committee hiked by 25 basis points in a closely split four-to-two vote, the first increase since May 2023. The hike took effect on 29 May 2026. At the July meeting the committee held steady — but not comfortably: four members voted to hold and two preferred another 25 basis point increase.
Why September is different
The May hike happened because inflation was climbing. Headline CPI rose from 4.0% in April to 5.0% in June — a two-year high, the hottest reading since June 2024's 5.1% — driven largely by fuel prices linked to the Middle East conflict. South Africa now also targets inflation of 3% with a one-percentage-point tolerance band, a framework adopted in November 2025 that leaves far less room to tolerate overshoots than the old 3–6% range did.
The most recent print has shifted the picture. Statistics South Africa reported on 19 August that inflation cooled to 4.3% in July, down from 5.0% in June — the first slowdown in five months, with prices up just 0.2% month on month. That does not guarantee a cut: 4.3% is still above the target point, and the forecasters are genuinely split. Nedbank's Corporate and Investment Banking unit still expects a 25 basis point hike in September, arguing that elevated services and core inflation may prove persistent. The SARB's own Quarterly Projection Model shows the policy rate broadly stable through the remainder of the year. Governor Lesetja Kganyago has flagged upside risks to inflation — including an oil-price scenario as high as $100 a barrel — while describing the current stance as "somewhat restrictive". In short: a hold is the base case, a hike is a live possibility, and a cut this month is very unlikely.
What it means for your bond
Most South African home loans are priced at, or relative to, prime — so every MPC decision flows straight into your monthly instalment. The arithmetic, on a 20-year bond at prime with no margin, before fees: if prime rose from 10.50% to 10.75%, the monthly repayment would increase by roughly R168 per R1 million of bond — about R253 a month on R1.5 million and R337 on R2 million. Treat those as ballpark illustrations, not quotes; your actual rate depends on your risk profile — our piece on what a rate change does to your bond repayment sets out the same arithmetic for every bond size. Homeowners on fixed-rate deals are insulated until the fixed period ends, after which the rate typically reverts to prime-linked.
There is a second, quieter effect. When rates rise, banks reassess affordability, and the same income qualifies for a slightly smaller loan — which is one reason house price growth has been cooling even as approvals keep rising.
If you're buying
Run your affordability numbers at 10.75%, not 10.50%. The bond you qualify for at the higher rate is smaller, and a pre-approval built on today's rate may need to be redone after the decision — an avoidable delay in an offer situation. Be equally clear-eyed about fixing: banks price fixed rates at a premium to variable, and that premium already assumes further increases, so fixing near the top of a cycle can lock in the most expensive version of your loan. Ask for the specific premium and compare it honestly before deciding.
What to watch next
- The MPC statement on 23 September at 15:00 SAST — the committee's explanation of the vote split matters as much as the number. If the repo rate moves, banks typically adjust prime the following business day, and variable-rate repayments follow.
- The August CPI print, which Stats SA releases in mid-September — after the MPC meeting. One soft month is a data point, not a trend; oil and the rand are the swing factors.
- The final MPC meeting of the year on 19 November 2026.
The practical takeaway
Trying to buy or refinance around a single MPC date is a gamble with modest stakes — 25 basis points is about R168 a month per R1 million of bond, not a make-or-break sum. The more useful exercise is to stress-test your own budget: if prime were half a percentage point higher in a year's time, would the instalment still be comfortable? If yes, the September decision is context, not a deadline. And if you are serious about buying this spring, a free pre-qualification check gives you a bank-backed affordability answer at today's rates — which beats speculation every time.
Figures as at 12 September 2026. Sources: Stats SA CPI (P0141) July 2026 release of 19 Aug 2026; SARB MPC statements (May, July 2026) and MPC calendar; Moneyweb, "Sarb holds rates steady at 7%" (23 Jul 2026) for the Nedbank CIB call, QPM path and Kganyago remarks; repayment arithmetic verified to the rand by Rates & Lender Data (20-year annuity at prime+0).