Extra payment calculator
What a few hundred rand extra each month does to your term and your interest bill.
Check that your finance agreement allows penalty-free early payments. Most SA agreements do, but balloon structures sometimes route extras differently.
Your payoff, year by year
| Month | Interest that month | Extra paid | Still owed (core) |
|---|---|---|---|
| 12 | R 2 685 | R 500 | R 270 244 |
| 24 | R 2 197 | R 500 | R 219 936 |
| 36 | R 1 649 | R 500 | R 163 388 |
| 48 | R 1 032 | R 500 | R 99 826 |
| 60 | R 339 | R 500 | R 28 380 |
| 65 | R 26 | — | R 0 |
Paying R 500 extra each month clears the loan 7m early and keeps R 14 266 out of the bank's pocket. Every extra rand goes straight at the capital, which is why the effect compounds.
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Why extras punch above their weight
Your normal instalment is mostly interest at the start of a loan. An extra payment skips that queue: every rand of it reduces the capital directly. Less capital means less interest next month, which means more of your normal instalment also reaches the capital. The effect snowballs, which is why starting extras in year one beats starting in year four.
If your deal has a balloon, extras matter twice: they shorten the amortising part of the loan and they can shrink the lump sum waiting at the end. Ask your bank to confirm in writing how they apply extra payments, because practice differs.
Common questions
Do extra payments really make a difference?
Yes, and more than most people expect. On a R315 000 loan at 11.75 percent over 72 months, an extra R500 a month clears the loan around 9 months early and saves roughly R15 000 in interest. The earlier in the term you start, the bigger the effect.
Are there penalties for paying extra in South Africa?
For consumer vehicle finance under the National Credit Act, banks generally allow extra payments and early settlement. Agreements over R250 000 can carry a small early settlement charge. Check your contract, but for most people extras are penalty-free.
Should I pay extra or save the money instead?
Compare rates. Paying extra on a loan at 11.75 percent is a guaranteed 11.75 percent return. If your savings earn less than your loan costs, the loan wins. Keep an emergency fund first, then attack the loan.