Mortgage Payoff Calculator

Updated October 2026 · No sign-up — your data stays on your device

See how extra monthly payments or a one-off lump sum shorten your mortgage term and how much interest you save.

Your mortgage

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Your result

Estimates only, based on the numbers you enter and the rules shown. Not financial advice. Your lender or provider will use its own checks.

How it’s calculated

Each month, interest is charged on the balance (APR ÷ 12) and your payment is taken off. Paying extra goes straight to the balance, so less interest builds up every month after that. That is why a small extra payment can cut months or years off.

Before you overpay your mortgage

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Frequently asked questions

How much faster will I pay off my mortgage with extra payments?

Enter your balance, rate and payment above. Even a small extra amount every month can take years off a long mortgage, because each extra dollar stops interest building on it.

Is it better to overpay monthly or make a lump sum?

Both help. A lump sum now saves more interest than the same amount spread out later, but regular overpayments are easier for most budgets. Try both in the calculator.

Should I pay off my mortgage early or invest?

It depends on your mortgage rate, your other debts, your emergency savings and your goals. This calculator shows the interest saved; for a personal recommendation, talk to a qualified adviser.

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