Chapter 10 of 10 · After you buy · 5 of 6
Overpaying your mortgage in Ireland: the rules and the savings
Checked 21 Oct 2026the Central Bank's mortgage measures, Revenue's rules and the scheme operators' published terms.
Overpayment limits on fixed rates, breakage fees, reducing term or payment, and the interest you save. Uses our overpayment calculator.
Written in plain English for the person buying, selling or switching. This guide covers the Republic of Ireland only.
Overpaying means paying more than your mortgage asks for, either a lump sum or an extra amount each month. Every euro you pay early stops costing you interest. This guide explains the limits on fixed rates, the breakage fee, the choice between cutting the term and cutting the payment, and what the saving looks like.
Why overpaying saves money
A mortgage charges interest on the balance you owe. Each month, part of your payment is interest and part pays down the balance. When you pay extra, all of the extra goes to the balance. From then on, there is less balance to charge interest on, every month until the loan ends. See the glossary for the terms here.
The saving builds up over years. That is why a modest overpayment early in the loan saves more than the same amount near the end.
The 10% rule on fixed rates
On a fixed rate, most Irish lenders let you overpay up to 10% of the balance each year without a breakage fee. On a balance of €250,000, that is €25,000 a year. Some lenders measure it on the balance at the start of the year, others on the original loan. A few set a different limit. Credit unions that offer mortgages often allow unlimited overpayment. Check your loan offer, or ask your lender in writing.
| Balance | 10% allowance a year |
|---|---|
| €150,000 | €15,000 |
| €250,000 | €25,000 |
| €350,000 | €35,000 |
Above the allowance, a breakage fee can apply to the extra. On a variable rate there is no limit and no fee.
The breakage fee
A breakage fee is a charge for paying off part of a fixed rate loan early. The lender fixed its own borrowing to match yours, and the fee covers its cost of unwinding that. It is worked out from the lender's cost of funds under the Consumer Credit Act 1995.
If market rates have fallen since you fixed, the fee can be large. If they have risen, it is often zero. The lender must give you the figure in writing when you ask. Ask before you pay, and ask for the figure on the extra above the allowance only.
Term or payment
When you overpay, the lender asks what you want to happen next. There are two choices.
Reduce the term. Your monthly payment stays the same, and the loan ends sooner. This saves the most interest.
Reduce the payment. The loan ends on the same date, and your monthly payment falls. This gives you breathing room each month but saves less.
Some lenders apply one by default. Tell your lender which you want, in writing, each time.
A worked example: €200 a month extra
Say you owe €250,000 at 3.5% with 25 years left. Your payment is €1,252 a month. You pay €200 extra each month and keep the term reducing.
| Without overpaying | Paying €200 extra a month | |
|---|---|---|
| Monthly payment | €1,252 | €1,452 |
| Years to clear the loan | 25 | About 20 |
| Total interest paid | About €125,450 | About €97,800 |
| Interest saved | About €27,700 |
For €200 a month, the loan ends about 5 years early and costs about €27,700 less. The extra you pay in over those 20 years is €48,000, so the net gain is the €27,700 of interest, plus 5 years with no mortgage.
A worked example: a €25,000 lump sum
Same loan. You pay €25,000 in year one, which is within the 10% allowance.
| Reduce the term | Reduce the payment | |
|---|---|---|
| Monthly payment after | €1,252 | €1,126 |
| Years to clear the loan | About 21 years 3 months | 25 |
| Interest saved | About €31,000 | About €12,500 |
The same €25,000 saves two and a half times as much when it cuts the term rather than the payment. The overpayment calculator runs both for your own loan and shows your fixed rate allowance.
Before you overpay
Four checks come first.
- An emergency fund. Money paid into the mortgage is hard to get back. Most advice starts with three to six months of spending in a savings account.
- More expensive debt. A credit card or a personal loan usually charges far more than a mortgage. Clear those first.
- The allowance and the fee. On a fixed rate, stay within the allowance, or get the breakage fee in writing.
- Your savings rate. If a savings account paid more than your mortgage rate after tax, saving would come out ahead. In 2026 most deposit accounts paid less than the average mortgage rate of 3.53%, but check your own figures.
Overpaying and switching
Overpaying and switching work together. A lower balance means a lower loan-to-value, which can put you in a lower rate band when you switch or refix. Our switching guide sets out the steps.
If you are thinking of switching soon, there is a timing point. A large overpayment on a fixed rate just before you switch may carry a breakage fee, while the same overpayment on the day the fixed period ends carries none. Our guide on a fixed rate ending explains the dates.
Since 24 March 2026, under the Consumer Protection Code 2025, your lender must tell you what you could save by moving to a lower rate it offers. That letter is also a good moment to ask about overpaying. Our changes page logs the rule.
Overpaying a tracker
A tracker has no breakage fee and no limit, so you can overpay freely. Because the margin is fixed for life, overpaying a tracker keeps the tracker and cuts the interest. Our tracker guide explains why most people keep theirs.
If money is tight
Overpaying is for when there is money to spare. If you are finding the payments hard, the first step is the free routes: MABS and the others on our money help page. Our guide on mortgage arrears help explains your rights under the Code of Conduct on Mortgage Arrears.
Where this leaves you
Put your balance, rate and term into the overpayment calculator with the extra you have in mind. It shows the interest saved, the years saved and the fixed rate allowance. If the numbers point you towards a lower rate as well, the switching journey sets out how to get one.
Questions people ask
How much can I overpay on a fixed rate mortgage in Ireland?
Most lenders allow 10% of the balance each year without a breakage fee. On €250,000 that is €25,000 a year. Credit unions that offer mortgages often allow more. Check your own lender's terms, as a few differ.
Is it better to reduce the term or the monthly payment when overpaying?
Reducing the term saves far more interest, because the loan ends sooner. Reducing the payment gives you more room each month but saves less. In our example, a €25,000 lump sum saves about €31,000 by cutting the term and about €12,500 by cutting the payment.
Can I overpay a variable rate mortgage?
Yes, by any amount, at any time, with no fee. The limits and breakage fees only apply to fixed rates.
Does overpaying my mortgage reduce the interest?
Yes. Interest is charged on the balance, so every euro you pay off early stops earning interest for the lender. Paying €200 extra a month on €250,000 at 3.5% over 25 years saves about €27,700 and ends the loan about 5 years early.
Should I overpay my mortgage or save?
That depends on your rate, your savings rate and whether you have money set aside for emergencies. A mortgage at 3.5% costs more than most deposit accounts pay, but money paid into the mortgage is hard to get back. Most advice starts with an emergency fund.