Mortgage Repayment Calculator Ireland Guide

A repayment mortgage spreads the borrowed amount and interest across the chosen term. If the interest rate stayed the same, each monthly payment would gradually clear the mortgage by the end of that term.

Early in the mortgage, a larger share of the monthly payment usually goes towards interest because the outstanding balance is still high. Later, more of the same payment goes towards capital because the balance has reduced.

The Mortgage Repayment Calculator turns those assumptions into a monthly figure, total repayable amount and interest estimate.

The table below uses a €300,000 repayment mortgage over 30 years. It is a calculation example, not a lender quote.

If a repayment only feels affordable at the lowest rate you tested, the budget may be too tight.

A repayment schedule shows the split between capital and interest over time. The payment may be similar each month, but the split changes. In the early years, interest is a bigger part of the payment. In later years, the capital reduction becomes stronger.

This is why overpayments made early can be powerful if your lender allows them. Reducing the balance earlier means less interest can build on that balance over the remaining term. Always check fixed-rate conditions before making overpayments.

1. Compare the same mortgage amount and same term across each rate.
2. Check the monthly repayment and the total interest, not just the headline rate.
3. Review fixed-rate period, cashback, fees, valuation, break charges and overpayment rules.
4. After the calculator, check whether the payment still works beside your net salary and household bills.

For budget range questions, move back to the Mortgage Affordability Calculator. For cost-of-buying questions, check the Stamp Duty Calculator.