Equal-payment loans
With an annuity schedule, the basic payment stays level while the rate is unchanged. Early payments contain more interest; later payments repay more principal.
Estimate repayments, total borrowing cost and how much time and interest regular overpayments could save.
Enter the nominal annual borrowing rate used to calculate interest. For a tracker mortgage, use the current benchmark rate plus the lender margin.
Sources: Bank of England interest-rate statisticsBank Rate history
Applied to principal to shorten the term.
Term reduced by–
Interest saved–
Illustrative calculation assuming an unchanged interest rate. Arrangement, account, insurance and other charges are not included. Check any early repayment charge in your agreement.
| Month | Payment | Interest | Principal repaid | Overpayment | Balance |
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Results update immediately whenever an input changes.
Add the amount, nominal annual interest rate and term in years or months.
Compare equal payments with an equal-principal schedule whose instalments fall over time.
See how regular extra payments could shorten the loan and reduce interest.
With an annuity schedule, the basic payment stays level while the rate is unchanged. Early payments contain more interest; later payments repay more principal.
The principal is split evenly across the term. Interest is charged on a falling balance, so payments start higher and then decrease.
Reducing principal earlier lowers later interest. This model keeps the scheduled payment logic and uses overpayments to shorten the term.
Use the nominal borrowing rate, not an APR that includes fees. For variable-rate borrowing, recalculate when the benchmark or lender rate changes.