Example result based on the prefilled values.
Monthly Payment
R1 228,17
Total Interest
R168 452,50
LTV
80.00%
Continue your plan
Useful next calculations
When to use this calculator
- Before comparing lenders, brokers, or repayment options.
- When you want to test how a different deposit, rate, or term changes affordability.
- When you need a quick estimate before using a formal quote or agreement in principle.
- When you are stress-testing your budget against a potential rate rise to see the impact on monthly payments.
- When you want to understand the full cost of borrowing — not just the monthly figure — before you commit.
A realistic South Africa planning example
Use these sample inputs as a quick scenario test, then change one variable at a time to compare outcomes.
Loan Amount (R)
R1,600,000
Property Value
R2,000,000
Interest Rate (%)
5%
Term (Years)
25 years
After entering these figures, review monthly payment, total interest and ltv together rather than in isolation — each metric tells a different part of the story. Then rerun the tool with one input adjusted to see which variable has the biggest effect on all three outputs before you settle on a plan.
How to read your results
Monthly Payment
Use this to check whether the scenario fits comfortably within your regular budget. If it looks tight, rerun the tool with a longer term or larger deposit to find the boundary of affordability.
Total Interest
This shows the long-run cost of borrowing beyond the original principal, which is especially useful when comparing terms or weighing up overpayment options. A shorter term usually cuts this figure significantly even if the monthly payment rises.
LTV
Loan-to-value helps you compare product eligibility and understand how much lender risk you are carrying at this deposit level. Crossing key LTV thresholds — typically 90%, 85%, or 75% — can unlock materially better interest rates.
Method & assumptionsAuthoritative sources
This calculator works on a standard capital and interest repayment basis, spreading your loan across the chosen term so that each monthly payment reduces the outstanding balance while also covering interest. The calculation uses compound interest applied monthly, which is how virtually all UK residential mortgage lenders price their products. The result shows an illustrative monthly payment based on the rate and term you enter — it does not account for mortgage fees added to the loan, payment holidays, or rate changes at the end of a fixed period. Real-world repayments may differ slightly depending on how your lender calculates daily interest. Always request a full Key Facts Illustration (KFI) or European Standardised Information Sheet (ESIS) from any lender before committing.
Official references
Common mistakes
- !Using an assumption that is not supported by a current local quote, bill, statement or official source.
- !Treating a generic estimate as a lender, provider, payroll or tax authority decision.
- !Mixing monthly and annual inputs without converting them consistently.
- !Forgetting location-specific taxes, fees, eligibility rules or payroll deductions where they apply.
- !Testing only one scenario instead of checking how a cautious assumption changes the result.
What to do next
- Run a second scenario with a cautious assumption so you can see the downside clearly.
- Compare the result with the related calculators below before making a decision.
- Check current local rules, eligibility and provider terms before applying or committing money.
- Keep a record of the assumptions so you can update the estimate when a quote, bill or pay figure changes.
- Use the result to prepare better questions for a lender, provider, adviser or employer rather than treating it as a final answer.
Frequently asked
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