The Power of Mortgage Overpayments
Making overpayments on your mortgage is one of the most powerful financial decisions available to UK homeowners. Because of the way compound interest works, each extra payment you make today saves you significantly more than its face value over the remaining term.
Consider a £200,000 mortgage at 5.5% over 25 years. Without overpayments, you will pay approximately £170,000 in interest over the life of the loan. By making an extra £200 per month, you could save over £40,000 in interest and cut nearly 5 years off your mortgage.
Overpayment vs. Savings
With the Bank of England base rate having risen significantly in recent years, both mortgage rates and savings rates have increased. The decision of whether to overpay your mortgage or keep money in savings now requires careful calculation.
As a general rule: if your mortgage interest rate is higher than the after-tax interest rate you can earn on savings, overpaying your mortgage will give you a better financial return. The overpayment saving is also guaranteed and tax-free, unlike savings interest which may be subject to income tax above your personal savings allowance.
Key Tips Before Overpaying
- • Build an emergency fund of 3–6 months' expenses first
- • Check your lender's annual overpayment limit (usually 10%)
- • Clear higher-rate debts (credit cards, loans) before overpaying
- • Consider a flexible or offset mortgage for maximum flexibility
- • Ask your lender to reduce the term, not the payment