What's Left, step 2 of 7: What does my home cost each month?
Mortgage overpayment calculator
See how much sooner you clear your mortgage, and how much interest you save, by paying extra each month.
You will be mortgage-free
5 years 8 months
sooner, and save £44,807.92 in interest.
With and without overpaying
| Item | Without | With £200 |
|---|---|---|
| Monthly payment | £1,332.43 | £1,532.43 |
| Time to pay off | 25 years | 19 yrs 4 mths |
| Total interest | £174,727.66 | £129,919.74 |
| Interest saved | £44,807.92 |
This is an estimate, not financial advice. Most deals let you overpay up to 10% of the balance a year without an early repayment charge; check yours.
Why overpaying saves so much
Every extra pound goes straight to the balance, so the next month's interest is charged on less. The saving compounds over the remaining term.
Check your deal's overpayment limit first. Early repayment charges usually apply above 10% a year during a fixed rate.
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These results are an estimate, not financial advice. They use the 2026/27 rates in force on 24 October 2026 and the inputs shown, so your actual tax, pay or costs may differ. Before making a decision about your money, check the figures with HMRC or your provider, or speak to a regulated financial adviser. Free, impartial guidance is available from MoneyHelper.
This page explains the rules using the 2026/27 rates in force on 24 October 2026. It is general information, not financial advice. For decisions about your own money, speak to a regulated financial adviser, or get free, impartial guidance from MoneyHelper.