Is Overpaying Your Mortgage Worth It in 2026?
With mortgage rates still elevated and savings accounts offering reasonable returns, the question of whether to overpay your mortgage or save the money elsewhere is genuinely interesting. Here's how to think about it.
The case for overpaying
Overpaying reduces your outstanding balance, which reduces the interest calculated each month. The effect compounds: every pound you pay off now saves you the interest that would have accumulated on it for the rest of the mortgage term.
On a £200,000 repayment mortgage at 4.5% over 25 years, overpaying £200/month saves you approximately £28,000 in interest and pays off the mortgage 6 years early.
| Monthly overpayment | Years saved | Interest saved |
|---|---|---|
| £100/mo | ~3 years | ~£14,500 |
| £200/mo | ~6 years | ~£28,000 |
| £500/mo | ~11 years | ~£52,000 |
| £1,000/mo | ~16 years | ~£72,000 |
Based on £200,000 at 4.5% over 25 years. Your figures will vary.
The 10% rule — beware early repayment charges
Most fixed-rate mortgages allow overpayments of up to 10% of the outstanding balance per year without penalty. Exceed this and you'll face an Early Repayment Charge (ERC) — typically 1–5% of the excess amount.
Always check your mortgage terms before overpaying. If you're near the end of your fixed period, it may be worth waiting until the deal ends (when there's usually no ERC) before making larger overpayments.
Overpaying vs saving — which is better?
The break-even point is simple: if your mortgage rate is higher than your after-tax savings rate, overpay. If your savings rate is higher, save.
| Mortgage rate | Best savings rate (2026) | Verdict |
|---|---|---|
| 5.0% | 4.8% (gross) / ~3.8% (basic rate taxpayer) | Overpay wins |
| 4.5% | 4.8% (gross) / ~3.8% (net) | Save wins slightly |
| 3.5% | 4.8% (gross) / ~3.8% (net) | Save clearly wins |
Overpaying vs pension contributions
If your employer matches pension contributions you haven't claimed, that should come first — it's an immediate 100% return. After that, the mortgage vs pension debate depends on your age and tax situation. Pension contributions get tax relief; mortgage overpayments don't.
The psychological factor
Some people sleep better knowing their mortgage is shrinking faster. The financial optimum isn't always the right answer — peace of mind has real value. A hybrid approach (split between overpaying and saving) often works well.
Calculate your overpayment savings
See exactly how much interest you save and years you cut with our mortgage overpayment tool.
See how much overpaying saves you
Model overpayments on your mortgage to see interest saved and years knocked off your term.