FAQ 015 | Can You Repay a UK Mortgage Early, and What Is anOverpayment Allowance?

Author: SJW Research & Intelligence

Brand: SJW UK Properties

Can you repay a UK mortgage early, and what is an overpayment allowance?

This is a point we have often drawn to clients’ attention at SJW UK Properties since 2015. Many assume that repaying a mortgage early always means paying a penalty to the lender. That is not the case across the board. Many UK mortgage products allow a borrower to repay part of the capital in each mortgage year, within the terms of the loan, without incurring an early repayment charge. This provision is generally known as the overpayment allowance.

What is an overpayment allowance?

Put simply, it is the amount of capital a lender allows you to repay early, within defined limits, without triggering an early repayment charge. Most products set an annual limit expressed as a proportion of the outstanding balance. Many allow up to 10% of the balance to be repaid in each mortgage year without charge, although the terms differ between lenders and between products. Your own mortgage offer is the authoritative source.

Why is overpaying worth considering?

Repaying part of the capital early usually brings several benefits.

Less interest paid over the life of the loan

Once the capital balance falls, the interest payable on it may fall too. For clients who intend to hold a property for the long term, this is particularly worth noting.

Greater flexibility in family cash flow

Some clients receive a bonus, a dividend or other one-off income each year. Where the product permits, they may choose to use part of it to reduce the mortgage rather than carry the full balance indefinitely.

Reaching your financial goals sooner

Every family plans differently. Some want to reduce their debt as quickly as possible; others prefer to maintain a higher level of borrowing and deploy their cash elsewhere. Whether overpaying is the right choice has no universal answer, and should be considered alongside the family’s overall asset allocation.

What should you check before overpaying?

Many clients ask only whether they are allowed to overpay. We would suggest starting with the product itself. For example:

 How much may be repaid early each year?

 How is the allowance calculated?

 Would the payment exceed the overpayment allowance?

 Would an early repayment charge arise?

 Will the monthly payment be adjusted after an overpayment?

 Will the term of the loan be shortened?

Products differ on each of these points. Before making an overpayment, read your mortgage offer carefully or speak to a professional mortgage adviser.

In business since 2015: many clients know they have a mortgage, but not that they have the right to overpay

Since 2015 we have met clients who discovered only after many years of holding a mortgage that their product had allowed them to repay part of the capital each year. Others, not having read the terms, inadvertently exceeded the permitted allowance and incurred an early repayment charge. In fact, all of this is set out clearly in the mortgage offer. The difficulty is that many people put the document in a drawer once the loan completes and never look at it again.

SJW Insight

Since 2015 we have become increasingly convinced that a UK mortgage offer is more than a letter of approval. It reads more like a manual for managing your finances over the long term. Alongside the loan amount and the interest rate, it sets out the rules on overpayments, remortgaging, early repayment charges and other important terms. We therefore always encourage clients not to open their mortgage offer for the first time at the moment they want to make an overpayment. Managing a mortgage professionally means more than paying on time. It means understanding the rules of the product and making them work for your long-term

plans.

Last updated: July 2026

Disclaimer: This article is provided for general information only and does not constitute legal, tax, financial or investment advice. Terms vary between lenders and between products. Please rely on your own mortgage offer and the advice of a professional mortgage adviser.