See each payment split between principal and interest, with the balance declining to zero. Enter your own values below. The calculator shows the formula it uses, a graph and a step-by-step explanation of the result.
Also searched as: amortization schedule, amortisation, repayment schedule, loan amortization
How the calculation works
Formula
Interestₖ = Opening Balanceₖ × i; Principalₖ = Paymentₖ − Interestₖ; Closing Balanceₖ = Opening Balanceₖ − Principalₖ
The schedule applies each end-of-period payment first to interest due, then to principal. The remaining balance becomes the next period’s opening balance.
What you enter
- Loan principal
- Annual interest rate (%)
- Loan tenure (years)
- Payment frequency
- Display currency (formatting only — no exchange-rate conversion)
What the results show
- Payment per period
- Total repayment
- Total interest
- Loan principal
- Number of payments
Results are estimates based only on the values and assumptions you enter. Open the detailed analysis to see the graph, the step-by-step story and the stated assumptions, and use the report menu to print, save as PDF, export a schedule to CSV or share the inputs.
This calculator also produces a period-by-period schedule that can be exported as CSV.
Privacy note on share links: Copy Link and share actions place the values you entered in the web address. Anyone with the link can see them, and they may be kept in browser history or server logs. Do not share links that contain sensitive personal financial information.
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When to use this calculator
How is each payment split between interest and principal? Borrowers who want a full repayment schedule can use it to get a quick estimate from their own figures.
Worked example
On a 100,000 loan at 9% over 20 years, the monthly payment is 899.73. In the first month, interest is 750.00, principal repaid is 149.73, and the balance falls to 99,850.27.
Illustrative figures in any currency. Enter your own values in the calculator above.