Should I Overpay My Mortgage? A UK Decision Guide

It depends on your mortgage rate, your savings, how much cash you need to keep and your lender’s charges. Overpaying can reduce the interest you pay and bring your mortgage-free date forward, but it is not right for everyone, and money you overpay is usually hard to get back. This guide gives you questions to work through, not a recommendation.

Five questions to ask yourself

1. Do you have an emergency fund? Many people build one before overpaying, because overpaid money is usually locked into the property. A common suggestion is three to six months of essential expenses.

2. Is your mortgage rate higher than what savings would earn after tax? If it is, overpaying may reduce your costs more than saving would. If it is not, you may want to compare saving more closely. Our guide to overpaying versus savings accounts goes through this, and overpaying versus an ISA covers investing.

3. Do you have more expensive debts? Credit cards and loans often charge higher interest than a mortgage, so it can help to compare rates before deciding where spare money goes.

4. Can you stay within your lender’s allowance? Overpaying beyond it during a fixed or discounted rate can trigger an early repayment charge. See the UK mortgage overpayment cap and overpaying during a fixed rate.

5. Is a remortgage or the end of your fixed rate close? Timing can matter for charges and for your loan-to-value. See how overpayments affect your next remortgage rate.

Overpay, save, invest or pension: what each can and cannot do

• Overpay the mortgage: can reduce interest and shorten your term. Main risk: the money is hard to get back, and charges may apply above your allowance.
• Save: keeps cash available. Main risk: savings rates may be lower than your mortgage rate, and interest may be taxable.
• Invest (for example an ISA): returns are not guaranteed and can fall as well as rise.
• Pension contributions: may attract tax relief, but the money is generally locked away until retirement age. See overpaying after age 55.

Is it better to overpay or reduce your term?

This is really two choices. If your lender keeps your payment the same, the term shortens. If it lowers your payment, the term stays close to the same. For the same overpayments, shortening the term usually saves more interest, while lowering the payment frees up a little cash each month.

As an illustration, take a £200,000 balance, a 4.5% rate that stays the same, 25 years remaining and £200 a month overpaid, with no fees or early repayment charges. If the term shortens, this could save about £36,281 in interest and end the mortgage about 73 months (6 years 1 month) sooner. If your lender lowers your payment instead, your payment could fall by about £13.50 a month after a year and the saving could be about £19,000. Figures are estimates from this site’s calculator. Compare both views with your own numbers in the free mortgage overpayment calculator, and read shorten your term or lower your payment for more.

Who may want to speak to an adviser first

Consider speaking to a regulated mortgage adviser, or a pension or retirement adviser, if you are approaching retirement, have variable or irregular income, have an interest-only mortgage, or are thinking about equity release. Our guide to when to speak to a mortgage broker about overpayments explains what a broker can help with.

Questions people ask

Is it better to overpay my mortgage or save?
It depends. If your mortgage rate is higher than the after-tax rate on your savings, overpaying may reduce your costs more. But overpaid money is usually hard to get back, so many people keep an emergency fund first. See mortgage overpayments versus savings accounts.

Is overpaying worth it if interest rates are falling?
It can still be worth considering, but the case may change. If your rate is fixed, falling market rates do not change what you pay until your deal ends, and you may prefer to keep flexibility for your next remortgage. Check your lender’s overpayment allowance and any early repayment charge.

How much should I keep as an emergency fund before overpaying?
A common suggestion is three to six months of essential expenses, but the right amount depends on your income, dependants and other commitments. This is general information, not advice on your circumstances.

Where to go next

If you decide to overpay, see how to overpay your mortgage and how much to overpay.