There are three legitimate ways to pay off a UK mortgage early: regular monthly overpayments, one-off lump sums, or fully remortgaging onto a shorter term. The first two are fee-free up to the 10% annual cap. Here's the playbook.
You'll be mortgage-free 6 years 9 months earlier
and save £46,940 in interest.
| Without | With overpay | |
|---|---|---|
| Term | 25 years | 18 years 3 months |
| Total interest | £156,277 | £109,338 |
| You save | £46,940 · 6y 9m |
A lower interest rate could save you thousands more on top. See if you could remortgage to a better deal.
We may receive a commission if you remortgage through a partner broker. This never affects the rate you're offered.
Start small — £50–£100/month is enough to materially shorten the term. Most UK lender apps (Halifax, Nationwide, Santander, NatWest, Barclays, HSBC, Lloyds, TSB, Virgin Money) let you set this up in under a minute.
Use 'reduce term' (the default for every UK lender), not 'reduce payment' — it saves roughly twice as much interest.
Any one-off money — work bonus, tax refund, inheritance, savings — can be sent as a lump sum overpayment with your mortgage account number as the reference. Stay within the 10% annual cap to avoid ERCs.
Lump sums applied early in the year save the most interest because the saving compounds across more remaining months.
When your fix ends, remortgage onto a shorter term if you can afford the higher monthly payment. Going from 25 years remaining to 15 years saves far more interest than any amount of overpaying.
Want to fully repay? Wait until your fix ends and you roll onto SVR. Every UK high-street lender drops the 10% cap on SVR, so you can clear the full balance with no ERC.
Important: This article is for general information and is not financial advice. Always speak to a qualified UK mortgage adviser before making decisions about overpayments, remortgaging, or your specific mortgage product.