Overpaying your mortgage: shorter term or lower installment?
Extra payments save interest – but you usually have to choose what they reduce. Which option saves more?
Kready · 2026-08-14
If you have spare money, you can overpay your mortgage – repay part of the principal earlier.
Option 1: shorten the term
- The installment stays roughly the same.
- The loan ends earlier.
- Maximum interest saving.
Option 2: lower the installment
- The term stays the same.
- Each monthly payment becomes smaller.
- More flexibility in your monthly budget, smaller saving than option 1.
Which to choose?
- Stable income and a financial cushion? Shorter term saves the most.
- Want security in case of worse months? Lower installment.
- Planning a refinance or new loan? A lower installment can improve creditworthiness.
Check the fees
Overpayments may be subject to a fee in the first 3 years of a variable-rate loan or during a fixed-rate period. Many banks allow free overpayments online.
Overpay or invest?
If your savings earn less than your mortgage rate, overpaying is usually a safe, guaranteed "return". Keep an emergency fund first.
See exactly how much you would save – and how the installment and end date change – in our overpayment calculator.
Want to know how your current loan compares with today's offers? Try the refinance option in the calculator.