Loan Repayment Calculator
Estimate a level monthly payment and total interest from user-entered loan terms.
All values and rates are entered by you. No live rate is assumed.
Your result
Enter your assumptions, then calculate.
Formula and method
Uses the standard reducing-balance amortisation formula. A zero-rate loan divides principal by months.
Worked example
The pre-filled values demonstrate the calculation only. Change every field to match the scenario you want to explore.
Limitations
Lenders may add fees, insurance, penalties or different day-count rules; compare the lender’s disclosed total repayment.
Results exclude terms not entered, may differ because of rounding and should be checked against formal provider disclosures.
Practical next steps
- Run more than one rate or time scenario.
- Record fees and terms the calculator does not include.
- Compare the output with the provider’s written disclosure.
SmartMoney — A REVTEK publication · Reviewed 2026-09-23 · Educational information only · Methodology