Free tool — nothing to sign up for
Loan & bond calculator
Work out what a car, bond or business loan really costs — the monthly instalment, the payoff date, the total interest, and what paying a bit extra each month would do. Your figures stay in your browser and are never sent to us.
Fill in the amount, rate, term and first payment date on the left — your instalment, payoff date and burn-down graph appear here.
What you still owe, month by month
What if I pay a bit extra?
See what an extra amount each month, from today onwards, would save you.
Month-by-month schedule
Months that have already gone by are yours to correct — type in what you actually paid and everything below re-works itself.
| # | Month | Payment | Interest | Off the loan | Still owing |
|---|
Off by default. Tick it and your figures are saved in this browser only — on this device, for you. They are never sent to Vali and we never see them. Clearing your browser data removes them.
Keep your loans in your books, not in a browser tab
This calculator forgets everything the moment you close it, unless you tick the box. In Vali, a loan lives alongside your accounts — the balance, what you have actually paid and the interest are all kept for you, on every device you log in from.
How this calculator works
Interest is worked out on the balance still owing at the start of each month, at your annual rate divided by twelve — the same way a South African bank or vehicle finance house does it. Whatever is left of your instalment after the interest comes off the loan itself, which is why the early months barely move the balance and the last ones move it quickly.
Leave the monthly instalment blank and the calculator works out the amortised figure for your amount, rate and term. If your lender quoted you a different number, type theirs in — it is usually a few rand out because of initiation and monthly admin fees, which this calculator does not include.
A balloon or residual is the lump sum still owing at the end of the term. Because you are not paying it off along the way, you pay interest on it for the whole term, and it falls due in one go on the last month.
Nothing here is financial advice, and the figures are estimates for planning. Your lender's own statement is the number that counts.