What could an extra monthly mortgage payment change?

One mortgage, three monthly scenarios

This synthetic example uses a £220,000 balance, a 4.5% annual rate and a 27-year term. The rate stays constant throughout. Extra payments begin straight away and continue each month.

What this excludes: lender fees, overpayment allowances, lump sums and future rate changes. It does not assess whether the payment fits your budget or goals. The figures are projections, not a lender quote or savings you have realised.

In this model, an extra £100 each month reduces the projected term by 45 months and total interest by £25,504.90. Increasing the extra payment to £150 reduces the term by 63 months and interest by £35,298.50 compared with no extra payment.

The trade-off is a higher recurring payment and less cash available for other needs. The calculation cannot choose that trade-off for you.

The calculator opens for your preferred country. This GBP illustration is not converted into your currency. Country-specific lender terms remain outside this model.

Check the separate questions

• What does your lender allow, and could extra payments incur a charge?
• What cash would remain for essential spending, unexpected costs and other commitments?
• Which assumptions would you need to revisit if your income, payment or interest rate changed?

For UK borrowers, MoneyHelper explains early repayment considerations. Its guidance is UK-specific. For another country, check your own lender terms and relevant local guidance.

For a UK calculation involving one-off overpayments or comparison with savings interest, the MoneySavingExpert overpayment calculator offers those options. Ankzo’s saved repayment-plan journey covers a selected recurring monthly extra.

Keep the scenario, then revisit it

1. Calculate: enter your balance, annual rate, term and recurring extra payment. Review the results and assumptions without signing up.
2. Keep: with an account, explicitly keep the selected repayment plan. Signing in alone does not save calculator inputs to your profile.
3. Reopen: use Financial GPS to return to your saved work. Compare a revision while retaining the original result separately.
4. Review: update assumptions when circumstances change. A revised projection is still hypothetical; it does not make a payment or contact your lender.

You can also view a local summary and use browser printing. Account features are currently included at no charge, subject to availability and usage limits.

Start with a savings question instead

If your question is about building cash, explore a savings goal first. The connected savings, budget and emergency-buffer journey asks you to review proposed links. A mortgage result does not automatically fill your budget; its cash-flow destination opens empty.

Browse other decision paths · How Ankzo works