Bond Repayment Comparison Calculator
Compare monthly repayment, total interest and payoff date across up to 3 loan structures, different rates, terms or deposits.
Quick answer: Fill in Option A, then add Option B and C to compare up to 3 loans at once, such as rate offers from different banks. At prime 10.75% (SARB, 23 September 2026), a R1,500,000 bond over 20 years costs about R15,228 a month, or R15,739 at prime plus 0.5%. Comparing one loan? Use the single Bond Repayment Calculator.
Compare Bond Repayment
Enter loan details for Option A, then optionally add up to 2 more to compare
Option A
Balance Remaining Over Time
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Where an extra monthly payment is entered, that option's repayment, total interest, total repaid and payoff date all include it.
* Estimates only. Bond registration and legal costs are not included. Consult your bank or bond originator for a formal quote.
Get Real Rate Offers to Compare
Bond originators submit to multiple banks simultaneously and often secure better rates than going direct, at no cost to you. Get real offers to plug into this comparison.
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How to Use This Comparison Tool
- Fill in Option AEnter the purchase price, deposit, interest rate and term for the loan structure you want to compare.
- Click + Compare Against Another OptionAdd Option B to compare a second loan structure, for example a different bank's rate.
- Click + Compare A Third OptionAdd Option C if you have a third loan structure to weigh up.
- Click Compare Bond RepaymentSee monthly repayment, total interest and payoff date for every option you filled in, side by side.
Why Compare Bond Offers Side by Side?
A 0.25% rate difference on a R1.5 million bond sounds small, but over a 20-year term it typically works out to tens of thousands of rand in total interest, and a real difference in your monthly repayment. Banks and bond originators rarely present competing offers in a way that makes the total cost easy to compare at a glance: they show you a monthly figure, not the compounding effect over the full term.
This tool puts your loan offers side by side in one view instead of checking each one separately on the single-loan Bond Repayment Calculator. It's also useful beyond bank shopping: comparing a 20-year term against a 25-year term on the same rate shows exactly what the shorter term saves in total interest against what it costs in higher monthly repayment.
Frequently Asked Questions
Up to 3. Fill in Option A on its own for a single result, or add Option B and Option C to compare 2 or 3 loan structures side by side, for example different rates from different banks, different terms, or different deposit amounts.
Only the options you fill in are calculated and shown. Leave Option C empty and the results panel shows just Option A and Option B side by side, with no placeholder or blank column for the unused option. Option B stays hidden until you click the add button.
Yes, this is one of the most useful ways to use it. Enter the same purchase price and deposit in each option, then change only the interest rate to match each bank's offer, so you can see the exact monthly and total-interest difference before choosing.