The SARB Monetary Policy Committee hiked the repo rate by 25 basis points to 7.00%, lifting prime to 10.50% on 28 May 2026. Whether that affects you depends on whether you have a bond, and how big it is.
Here is exactly how rate changes flow through to your monthly repayment, and what the numbers look like in rands.
How does the repo rate affect your bond?
The SARB sets the repo rate. Commercial banks add 3.5% to arrive at the prime lending rate. Your bond is almost certainly linked to prime. Most South African home loans are variable rate, which means your repayment moves every time prime moves.
The chain looks like this:
SARB changes repo rate → prime rate adjusts → your bond repayment changes
There is no buffer. The adjustment happens automatically on the date the bank applies the new rate, typically within days of the MPC announcement.
At the current prime rate of 10.50%, a R1,000,000 bond over 20 years costs R9,984 per month. A 0.25% change in either direction shifts that by R168 per month.
What does a 0.25% rate change actually cost you?
A quarter of a percent sounds small. On a large bond, it adds up quickly.
| Bond Size | Current Repayment (10.50%) | After +0.25% Hike | Monthly Increase |
|---|---|---|---|
| R500,000 | R4,992 | R5,077 | +R85 |
| R750,000 | R7,488 | R7,615 | +R127 |
| R1,000,000 | R9,984 | R10,153 | +R169 |
| R1,500,000 | R14,976 | R15,230 | +R254 |
| R2,000,000 | R19,968 | R20,306 | +R338 |
20-year term. Figures rounded to nearest rand.
A single 0.25% hike on a R2,000,000 bond costs you an extra R338 every month. That is R4,056 per year, just from one MPC decision.
What if there are multiple rate changes?
Rate cycles rarely stop at one move. Between 2021 and 2023, the SARB hiked rates by a cumulative 4.75%. Borrowers who took out bonds at the 2020 low of 7.00% prime saw their repayments climb sharply over that period.
Here is what different rate scenarios look like on a R1,000,000 bond over 20 years:
| Prime Rate | Change from Current | Monthly Repayment | vs Today |
|---|---|---|---|
| 10.25% | -0.25% | R9,816 | -R168 |
| 10.50% | Current | R9,984 | — |
| 10.75% | +0.25% | R10,153 | +R169 |
| 11.00% | +0.50% | R10,322 | +R338 |
| 11.50% | +1.00% | R10,664 | +R680 |
R1,000,000 bond, 20-year term.
A full percentage point increase on a R1,000,000 bond adds R680 to your monthly repayment. On a R2,000,000 bond, that is R1,360 per month more than you pay today.
Why variable rate bonds carry this risk
When you sign a home loan in South Africa, your interest rate is expressed as prime plus or minus a margin. A good credit profile might get you prime minus 0.5%. A weaker profile might attract prime plus 0.5% or more.
Either way, the base moves with the SARB. Your margin is fixed. The rate you pay is not.
Fixed-rate bonds exist in South Africa but are uncommon. The few lenders that offer them typically price them higher than variable rates to compensate for the bank's own risk. Most borrowers end up on variable rates.
Try the calculator
Use the Calcura bond repayment calculator to compare monthly repayments at different interest rates and bond sizes.
How to protect yourself from rate increases
You cannot control the repo rate. You can control how exposed you are to it.
Build a repayment buffer. If your bond repayment is R9,816 and you pay R10,500, the extra R684 reduces your outstanding balance faster. When rates rise, you have room to absorb the increase without missing a payment.
Pay extra into your bond when rates are low. Every rand above your minimum repayment reduces your capital balance. A lower balance means a smaller repayment at any given rate.
Avoid drawing on your access bond for non-essentials. An access bond lets you withdraw extra payments you've made. Treating it like a credit card keeps your balance high and your exposure to rate risk elevated.
Know your affordability ceiling. If rates rose by 1.5% from today, could you still afford your repayment? If not, your bond is sized too close to your limit.
What to do when rates fall
A rate cut reduces your repayment automatically. Most people take the saving and move on. A better approach is to keep paying the same amount you were before the cut.
On a R1,000,000 bond, a 0.25% cut drops your required repayment by R166. If you keep paying R9,816 instead of the new R9,650, that R166 per month reduces your capital faster. You pay the bond off sooner and pay less interest overall.
Falling rates are the best time to accelerate your bond payoff. The compounding benefit of extra payments is highest when you have a long remaining term.
The next MPC decision
The SARB MPC meets again on 23 July 2026. Between now and then, watch two indicators: South Africa's CPI inflation figures and the rand/dollar exchange rate. Both influence the SARB's decision. If fuel prices push inflation above 4.5% and the rand weakens past R18/$, the probability of a hike rises.
For practical planning, run your own numbers at current rates and then stress-test at prime plus 1%. If the higher figure still fits your budget, your bond is well-sized for the current cycle.