Property tool

Repayment vs Interest-Only Mortgage Calculator

Compare repayment and interest-only mortgage payments, total interest and the capital still owed at the end of the term.

This illustration assumes the interest rate stays unchanged. Interest-only payments cover interest but do not repay the mortgage capital, so a separate plan is needed to repay the full balance at the end.

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How this tool works

Compare repayment and interest-only mortgage payments, total interest and the capital still owed at the end of the term. Work through the labelled controls, review the result in the preview and reset the tool whenever you want to begin again.

Interest-only does not clear the mortgage.The monthly interest-only figure does not repay any capital. The full mortgage amount remains due at the end and needs a credible repayment plan. MoneyHelper explains both repayment types.
Use the result as a guide.Check important financial, tax or contractual decisions with the relevant provider or a qualified professional.

Frequently asked questions

What is Repayment vs Interest-Only Mortgage Calculator useful for?

Compare repayment and interest-only monthly payments and total costs. Treat the result as an illustration: rates, fees, eligibility and lender calculations can change the real outcome.

Is my information stored?

This tool works in your browser. The information you enter is not sent to us or saved in an account by this tool.

How accurate is the result?

The calculation follows the assumptions shown on the page. Rounding, provider methods and real-world charges can produce small differences.

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