For most UK homeowners on a standard repayment mortgage, yes — overpaying is one of the highest guaranteed, tax-free returns you can get. But there are three situations where it isn't worth it (yet). Use the calculator below to see your exact saving, then read on for the rules.
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.
Your mortgage rate beats what you can earn (after tax) in a savings account. Right now with UK rates at 4–6% and easy-access savings around 3.5% gross, overpaying is usually the higher return.
You already have an emergency fund (3–6 months of essential outgoings).
You have no higher-interest debt and you're already capturing pension tax relief and employer matching.
You have credit-card or personal-loan debt at higher rates — clear that first.
You don't have a cash emergency fund — money paid onto a mortgage is locked into your home.
You're missing higher-rate pension tax relief — capture that first, then overpay with what's left.
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.