Loan repayment calculator: monthly payment, interest and total cost

Updated 7 November 2026 · ClearCost UK · 4 min read

Enter the amount, interest rate and term to see your monthly payment, the total interest and a year-by-year balance. Below the calculator you can open ready-made tables for popular amounts from £500 to £50,000. It works as a loan calculator, a repayment simulator and a quick way to compute the interest on any personal loan.
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How the payment is worked out

The payment is the amount that clears the loan exactly by the end of the term when interest is charged each month on what is still owed. Early payments are mostly interest and later payments are mostly capital, which is why the balance falls slowly at first.

A shorter term raises the payment but cuts the interest. A longer term does the opposite. Use the amount pages below to compare terms side by side.

Choose your loan amount

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Schedules

All Loan Repayments pages (122)

Sources and further reading

Questions people ask

How is the monthly loan payment calculated?
Payment = loan amount × monthly rate ÷ (1 − (1 + monthly rate)^−number of months). The calculator on this page does it for you.

Results are estimates for information only, not financial advice. Read the full disclaimer.

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