As a rough guide, overpaying beats saving when your mortgage rate is higher than the interest your savings would earn, because you save more than you gain. But keep an emergency fund first, check your overpayment allowance to avoid an early repayment charge, and clear costlier debts first. It is a balance.
The core comparison
The simplest lens is rate against rate. If your mortgage charges more interest than your savings earn, overpaying the mortgage usually leaves you better off, because every pound off the balance saves you that higher rate of interest. If savings pay more than your mortgage costs (and any tax on the savings interest is accounted for), saving can win. Rates change, so the answer can change too.
Before you overpay, check three things
- Emergency fund: keep accessible savings first. Money overpaid into a mortgage is hard to get back.
- Overpayment allowance: many deals let you overpay up to a yearly limit (often around 10%) without penalty. Beyond it you may trigger an early repayment charge.
- Costlier debts: clearing high-interest credit cards or loans usually beats both saving and mortgage overpayment.
There is also a feelings answer
Numbers aside, some people sleep better with a smaller mortgage, and others value the flexibility of accessible savings. Both are valid. If you want to model the effect of clearing debt faster, or you are near a remortgage, the remortgage section and a regulated broker can help you see the bigger picture. Speak to a regulated broker.
Founder, MortgageExplained
Adam spent over eight years as a mortgage adviser at Just Mortgages, with further experience in commercial finance. He is CeMAP and CF qualified. He built MortgageExplained to do one thing well: explain mortgages in plain English, so you know where you stand before you speak to a regulated broker. Every page on the site is written by Adam.
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