Calculators
Four free South African home loan calculators. Transfer duty follows the current SARS table, and the default interest rate tracks prime.
Bond repayment calculator
What will your monthly home loan instalment be?
Prime is currently 10.5% (reviewed 23 July 2026). A strong application can be approved below prime.
Even a small amount above the instalment cuts years off the bond.
- Total repaid over the term
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- Total interest paid
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- Minimum gross income required
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- Saved by paying extra
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- Bond paid off early by
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Affordability calculator
How big a home loan do you actually qualify for?
Include a co-applicant's income if you are applying jointly.
Groceries, transport, school fees, insurance, medical aid, subscriptions.
Car finance, credit cards, personal loans, store accounts.
- Affordable monthly instalment
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- Net income after deductions
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- Money left after all commitments
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- Debt-to-income ratio
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Bond and transfer cost calculator
The cash you need on top of your deposit.
Usually the purchase price less your deposit.
If the seller is VAT-registered and selling in the course of business, VAT is already in the price and no transfer duty is payable.
- Transfer duty (SARS)
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- Transfer attorney fees (incl. VAT)
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- Bond registration fees (incl. VAT)
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- Deeds office fees
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- Sundries (FICA, searches, postage)
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Transfer duty is exact and follows the SARS 2026/27 table. Attorney and deeds office amounts follow the recommended conveyancing tariff and are estimates — your attorney will confirm the final figure.
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Deposit and loan-to-value calculator
See what a bigger deposit does to your repayment and your approval odds.
- Home loan required
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- Deposit as a percentage
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- Monthly repayment
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- Interest saved vs a 100% bond
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FinCraft is a bond origination service. We compare home loan offers from South African banks on your behalf. Calculator results are estimates for illustration only and do not constitute a quote, an offer of credit, or financial advice. All home loans are subject to the lending criteria and credit assessment of the relevant bank.
Calculator questions
How is a bond repayment calculated in South Africa?
Home loan repayments use the standard amortisation formula. The monthly instalment equals the loan amount multiplied by the monthly interest rate, divided by one minus (one plus the monthly rate) raised to the power of minus the number of months. The monthly rate is the annual rate divided by twelve. Interest is calculated on the reducing balance, so early instalments are mostly interest and later ones mostly capital.
What income do I need for a R1 million home loan?
South African banks generally allow no more than about 30% of your gross monthly income to go toward a bond instalment. At prime over 20 years, a R1 million bond costs roughly R10 000 per month, which implies a gross income of around R33 000. Existing debt reduces this, because the bank looks at your total obligations, not the bond alone.
Are transfer duty and transfer costs the same thing?
No. Transfer duty is a tax paid to SARS on the purchase price, and it is nil below R1 210 000 for the 2026/27 tax year. Transfer costs are the conveyancing attorney fees, deeds office fees and sundries charged for moving the property into your name. You pay both, and neither is included in the home loan.
Does paying extra into my bond really make a difference?
Substantially. Because interest is charged on the reducing balance, every extra rand goes straight to capital. On a R1.5 million bond at prime over 20 years, an extra R1 000 per month typically cuts around four years off the term and saves several hundred thousand rand in interest. Use the bond repayment calculator above to model your own figures.
Find out what you qualify for — free
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