Bond repayment calculator
Monthly repayment, total interest and what an extra payment saves. Prime is 10,75% since 25 September 2026.
Monthly repayment
R 13 706per month
On a R 1 350 000 loan at 10,75% over 20 years. You'll pay R 1 939 342 in interest, 59% of everything you repay.
- Capital R 1 350 000
- Interest R 1 939 342
- Total R 3 289 342
Capital and interest, year by year
- Capital repaid
- Interest paid
If interest rates move
| Rate | Repayment | Change |
|---|---|---|
| 9,75% | R 12 805 | −R 901 |
| 10,25% | R 13 252 | −R 453 |
| 10,5% | R 13 478 | −R 227 |
| 10,75% (yours) | R 13 706 | – |
| 11% | R 13 935 | +R 229 |
| 11,25% | R 14 165 | +R 459 |
| 11,75% | R 14 630 | +R 924 |
How your repayment is worked out
Banks use a standard amortising formula: the same payment every month, where early payments are mostly interest and later ones mostly capital. Interest is charged monthly on the balance you still owe.
Most South African home loans are linked to the prime lending rate, which moves with the Reserve Bank's repo rate. Prime is currently 10,75% (repo 7,25%). Your bank may offer you prime, or prime plus or minus a margin, depending on your credit record and deposit.
Why extra payments work so well
Every extra rand goes straight to capital, so you stop paying interest on it for the rest of the loan. On a 20-year bond, even R500 a month can take years off the term.
Most banks let you pay in extra at no cost and draw it back through an access facility, so it can double as an emergency fund.
Read the guide: What the latest rate change means for your bond