Overpayment Savings Calculator

Q: Does overpaying my mortgage actually save money?

Yes. Extra payments go directly toward reducing your outstanding principal, which reduces the interest charged in every subsequent month. Over the life of a mortgage, even modest regular overpayments can save thousands of euro in interest and shorten the term by months or years.

Q: Are there limits on mortgage overpayments in Ireland?

Most Irish lenders allow you to overpay a variable-rate mortgage without penalty. Fixed-rate mortgages often restrict overpayments to a set percentage of the balance per year (commonly around 10%) before an early breakage fee applies. Always check your specific mortgage terms before overpaying.

Q: Is it better to overpay my mortgage or invest the money instead?

It depends on your mortgage interest rate compared to the likely after-tax return from investing, plus your personal risk tolerance and other financial goals. Overpaying gives a guaranteed, risk-free return equal to your mortgage rate. This calculator only models the mortgage side — speak to a financial advisor about your full picture.

Find out how much interest you could save, and how much sooner you could be mortgage-free, by paying extra each month.

Remaining loan amount

€25k€1m

Interest rate (% annual)

1%10%

Remaining term (years)

5 yrs40 yrs

Extra monthly overpayment

€0€1,500

Please enter valid positive numbers for all fields.

Check before you overpay: on a fixed rate, most Irish lenders only allow penalty-free overpayments up to about 10% of the balance per year — above that a breakage fee can apply. And ask your lender to reduce the term, not the monthly payment, or you won't get the interest savings shown here.

Without overpaying With your overpayment

How overpayments work

Every euro you overpay comes straight off your outstanding mortgage balance (the principal). Since interest is calculated on that balance each month, a lower balance means less interest charged going forward — which compounds over the life of the loan. The result is twofold: you pay less interest in total, and you finish paying off the mortgage sooner, even though your regular payment amount has gone up.

Worked example

Take a €300,000 mortgage at 4.0% over 30 years. Without overpaying, the standard monthly repayment is about €1,432, and total interest over the full term comes to roughly €215,600. Add just €200 extra per month, and the loan is paid off years earlier — freeing up thousands of euro in interest that would otherwise have gone to the lender. Try the calculator above with your own numbers to see the exact effect.

The earlier in the mortgage term you start overpaying, the bigger the impact, because you're reducing the balance while more of it is still outstanding and accruing interest.

Frequently asked questions

Does overpaying my mortgage actually save money?

Yes. Extra payments reduce your outstanding principal directly, which reduces the interest charged in every subsequent month. Over the life of a mortgage, even modest regular overpayments can save thousands of euro in interest and shorten the term by months or years.

Are there limits on mortgage overpayments in Ireland?

Most Irish lenders allow unlimited overpayments on variable-rate mortgages without penalty. Fixed-rate mortgages often cap penalty-free overpayments at around 10% of the balance per year before an early breakage fee applies. Always check your specific mortgage terms before overpaying.

Is it better to overpay my mortgage or invest the money instead?

It depends on your mortgage rate versus the likely after-tax return from investing, plus your risk tolerance and goals. Overpaying gives a guaranteed, risk-free return equal to your mortgage rate. This calculator only models the mortgage side of that decision — speak to a financial advisor about your full picture.

This calculator assumes your extra payment is applied consistently every month for the life of the loan, at a constant interest rate, with no early-repayment penalties. Real-world mortgages may charge breakage fees on fixed rates, apply annual overpayment caps, or require overpayments to be requested formally. Always check your lender's specific terms.