If you have a home loan, a car finance agreement, or any variable-rate debt in South Africa, the prime rate is the single most important number in your financial life. A 0.25% cut can put hundreds of rands back in your pocket each month. A 1% hike can cost you more than R600 on a single bond repayment. Yet most South Africans cannot explain exactly what the prime rate is or where it comes from. This guide fixes that.
What is the prime rate?
The prime rate — sometimes called the prime lending rate — is the benchmark interest rate that South African banks use to price their variable-rate lending products. When a bank advertises a home loan at "prime plus 0.5%", prime is the base, and 0.5% is their margin above it.
The prime rate is not set by the banks themselves. It is a direct function of the repo rate, which is set by the South African Reserve Bank (SARB). By market convention, the prime rate in South Africa is always repo rate + 1.5%. When the repo rate moves, the prime rate moves by exactly the same amount.
Current prime rate: 11.75% Current repo rate: 10.25% (Effective 26 March 2026 — source: SARB)
Repo rate vs prime rate: the difference
The repo rate (short for repurchase rate) is the rate at which the SARB lends overnight funds to commercial banks. Banks that need short-term liquidity borrow from the SARB at the repo rate. Because this sets the floor on what banks pay for money, it directly determines the lowest rate at which they can profitably on-lend to customers.
The prime rate is repo + 1.5%. That 1.5% covers the banks' cost of intermediation — the spread they need to operate profitably. This relationship has been fixed by market practice since the 1990s and is maintained consistently across all major South African banks.
When the SARB cuts or hikes the repo rate by 25 basis points (0.25%), the prime rate moves by the same 25 basis points in the same direction, effective immediately for variable-rate debt.
How the MPC sets the repo rate
The Monetary Policy Committee (MPC) is the body within the SARB responsible for setting the repo rate. It consists of the Governor, three Deputy Governors, and three senior SARB officials. The MPC meets six times per year, roughly every two months, over three days of deliberation.
At the end of each meeting, the Governor announces the decision — typically on a Thursday at 3pm SAST. The decision is one of three: hold, cut, or hike.
The MPC's primary mandate is to keep inflation within the target band of 3% to 6% (as measured by the Consumer Price Index, CPI). When inflation is running above the target, the MPC typically hikes rates to cool spending and borrowing. When inflation falls within or below the band and the economy is under pressure, the MPC may cut rates to stimulate activity.
Other factors the MPC considers include: global interest rate movements (particularly US Federal Reserve decisions), the rand exchange rate, economic growth (GDP), employment data, and expectations of future inflation.
2026 rate history
| Meeting Date | Decision | Prime Rate | Repo Rate | Change |
|---|---|---|---|---|
| 26 March 2026 | Hold | 11.75% | 10.25% | — |
| 29 January 2026 | Hold | 11.75% | 10.25% | — |
| 21 November 2025 | Cut | 11.75% | 10.25% | −0.25% |
| 18 September 2025 | Cut | 12.00% | 10.50% | −0.25% |
| 17 July 2025 | Hold | 12.25% | 10.75% | — |
| 22 May 2025 | Hold | 12.25% | 10.75% | — |
| 20 March 2025 | Cut | 12.25% | 10.75% | −0.25% |
| 30 January 2025 | Hold | 12.50% | 11.00% | — |
The MPC cut three times in 2025, reducing the prime rate from 12.50% to 11.75% — a cumulative 0.75% reduction over the year. Both 2026 meetings held rates steady as the MPC monitored global uncertainty and domestic inflation.
What a rate change means for your bond: worked example
The impact of even a 0.25% change is larger than most people expect, particularly on longer-term debt like a home loan.
Assumptions: R1,000,000 home loan, 20-year term, variable rate at prime + 0%.
| Rate | Monthly Repayment |
|---|---|
| 11.75% (current) | R10,413 |
| 11.50% (−0.25% cut) | R10,245 |
| 12.00% (+0.25% hike) | R10,584 |
| 12.75% (+1.00% hike) | R11,101 |
A single 0.25% cut saves approximately R168/month on a R1M bond. Over the remaining term, that compounds to a meaningful reduction in total interest paid. A 1% hike would cost R688/month more — an amount that represents a significant share of most household budgets.
For a R1,500,000 bond (a more typical price in Gauteng and Cape Town metros), the same 1% hike costs approximately R1,032/month more.
This is why MPC meeting dates matter to every South African with variable-rate debt.
What to do when rates change
If rates are cut:
Do not automatically reduce your monthly repayment. Keep paying the same amount you were paying before the cut. The extra rands — the difference between your new minimum and what you were paying — go directly to reducing your capital balance. This can cut years off your bond term and save tens of thousands in interest. Contact your bank to arrange this, as most will automatically lower your debit order to the new minimum.
If rates are hiked:
Reassess your monthly cash flow immediately. If your repayment increases by R500/month, that money has to come from somewhere in your budget. Identify the adjustment before your bank's debit order bounces. If you are close to the NCA 30% debt-to-income threshold, a rate hike can push you over it — use the Calcura Affordability Calculator to check.
If you are applying for a bond:
Apply for the highest rate you can comfortably afford, not the current rate. If prime is 11.75%, stress-test your affordability at 13.75% — a 2% hike from current levels. South Africa has been as high as 17% in recent history. Never take a bond you cannot service if rates rise by 2%.
Frequently asked questions
Does the prime rate affect a fixed-rate bond?
No. Fixed-rate home loans lock your interest rate for the agreed period (typically 1–5 years in South Africa, often at a premium to prime). MPC decisions do not change your instalment during a fixed-rate period. After the fixed period ends, your loan typically reverts to a variable rate linked to prime.
Why do different banks charge different rates?
All banks use the same prime rate as a base. The difference is the margin — what each bank adds on top of prime based on your credit profile. A client with a strong credit score, stable employment, and a large deposit may be offered prime minus 0.25%. A client with a weaker profile may be offered prime plus 2%. This is why it is worth applying to multiple banks or using a bond originator.
When does a rate change take effect on my loan?
For most variable-rate loans, the new rate takes effect from the next statement date or within one to two business days of the MPC announcement, depending on your bank's terms and conditions. Check your loan agreement or confirm with your bank.
Use the Calcura Bond Calculator to see the exact rand impact of any rate change on your specific home loan — enter your outstanding balance and current rate to calculate your new repayment.