For people trying to buy a home in Ireland, the biggest obstacle is often not finding a mortgage lender. It is getting enough borrowing to meet the price of the property.
Ireland’s mortgage market operates under lending limits set by the Central Bank of Ireland. The rules place limits on how much a borrower can take on relative to their income and the value of the property.
For first-time buyers, the main limit is currently four times gross annual income. Second and subsequent buyers are generally limited to 3.5 times income. Both groups normally need a deposit of at least 10%.
These limits can make a significant difference in a housing market where prices have risen faster than many household incomes.
First-time buyers can borrow up to four times their income
The Central Bank’s loan-to-income, or LTI, limit allows a first-time buyer to borrow up to four times their gross annual income.
For example, a household earning €80,000 a year could generally borrow up to €320,000 under the LTI limit.
A household earning €100,000 could generally borrow up to €400,000.
The calculation is based on gross income rather than the amount left after tax and other household expenses. However, reaching the LTI limit does not automatically mean a bank will approve that amount.
Lenders must still assess whether the mortgage is affordable for the individual borrower.
The four-times limit has applied to first-time buyers since January 2023, when the Central Bank increased it from 3.5 times income.
Second-time buyers face a lower income limit
People who have previously owned a home are generally subject to a lower LTI limit.
Second and subsequent buyers can borrow up to 3.5 times their gross annual income under the Central Bank rules.
That means a household earning €100,000 could generally borrow up to €350,000 under the LTI limit, compared with €400,000 for a first-time buyer household with the same income.
The distinction reflects the Central Bank’s assessment of the different risks and circumstances associated with first-time and existing homeowners.
A 10% deposit is normally required
The other major part of Ireland’s mortgage rules is the loan-to-value, or LTV, limit.
First-time buyers and second and subsequent buyers normally need to provide a minimum deposit of 10% of the property value. This means the mortgage can generally cover up to 90% of the purchase price.
For a €300,000 home, a 10% deposit would be €30,000, leaving a mortgage of €270,000.
For a €400,000 property, the minimum deposit would normally be €40,000.
Buy-to-let borrowers face a different rule. The current Central Bank framework sets a maximum LTV of 70%, meaning a 30% deposit is normally required.
The income limit and deposit limit work together
A buyer can satisfy the deposit requirement and still be unable to borrow enough to purchase the property.
Consider a first-time buyer household earning €70,000.
Four times that income is €280,000.
If the buyer has a 10% deposit, the LTV rule could allow them to purchase a property worth about €311,000. But if the available mortgage is capped at €280,000 by the LTI rule, they would need a larger deposit to buy a more expensive home.
This is why saving a 10% deposit does not necessarily solve the affordability problem.
The buyer must also have enough income to support the required mortgage.
Banks can lend above the limits
The Central Bank rules are not absolute barriers that every mortgage must stay below.
Lenders are allowed to provide a proportion of their mortgage lending above the standard LTI and LTV limits.
For first-time buyers, up to 15% of lending can be above the regulatory limits. The same 15% allowance applies to second and subsequent buyers. Buy-to-let lenders have a 10% allowance.
This does not mean a borrower is automatically entitled to an exception.
The allowance is controlled by the lender, and individual banks still decide whether a particular application meets their own lending and affordability standards.
A bank can therefore approve less than the maximum permitted under the Central Bank rules.
The Central Bank limits are not the same as a mortgage approval
This distinction matters when buyers calculate what they can afford.
The Central Bank sets system-wide limits designed to keep mortgage lending sustainable. Banks then assess individual applications.
A lender can consider factors such as income stability, existing debts, regular spending, employment circumstances and the applicant’s ability to meet repayments.
As a result, someone earning €90,000 may be within the four-times-income limit for a €360,000 mortgage but still receive an offer for a smaller amount.
The regulatory ceiling is therefore not a promise that a bank will lend the maximum.
What changed for bridging loans in 2026?
The Central Bank made a targeted change to its mortgage measures in April 2026 involving certain principal-home bridging loans.
A qualifying principal-home bridging loan can now fall outside the LTI limit. The change applies to loans used to purchase a new principal home before the borrower has sold their existing principal home.
The bridging loan must meet specific conditions, including a maximum term of 18 months and no requirement to repay the principal during that term.
The LTV limit still applies, and lenders remain responsible for assessing whether the loan is suitable and affordable for the borrower.
This is a targeted change rather than a general relaxation of Ireland’s mortgage lending rules.
Why the rules matter in Ireland’s housing market
The mortgage rules have become an important part of the affordability debate because house prices and household incomes do not move at the same pace.
For buyers, the four-times-income limit creates a direct link between earnings and maximum mortgage borrowing.
A rise in house prices does not automatically increase the amount a household can borrow. Unless income or the deposit increases, the buyer may find that properties within their mortgage range become harder to find.
That helps explain why the deposit alone is only one part of the challenge facing first-time buyers.
The key mortgage rules at a glance
Buyer Maximum LTI Standard maximum LTV Typical minimum deposit First-time buyer 4 × gross income 90% 10% Second/subsequent buyer 3.5 × gross income 90% 10% Buy-to-let buyer LTI limit does not apply 70% 30%
The Central Bank also permits a limited proportion of lending above the standard limits.
For anyone planning to buy a home, the practical lesson is straightforward: the maximum mortgage is determined by more than the deposit saved. Income, the Central Bank limits and the lender’s own affordability assessment all matter.
The rules can also change over time. The Central Bank reviews its mortgage framework and can adjust the measures when it considers changes necessary for the Irish housing and financial system.
For more on how Ireland’s housing data is tracked and measured, see our explainer on the RTB/ESRI Rent Index.
