How the Central Bank's mortgage rules work
Since 2015, the Central Bank of Ireland has applied macroprudential "mortgage measures" to residential lending, designed to keep household borrowing sustainable. Two limits matter most for how much you can borrow:
- Loan-to-income (LTI): First-time buyers can generally borrow up to 4 times their gross annual income. Second-time and subsequent buyers are limited to 3.5 times gross annual income.
- Loan-to-value (LTV) / minimum deposit: Most buyers need a minimum deposit of 10% of the property price (so the mortgage can cover up to 90% of the price). Buy-to-let purchases require a larger deposit (typically 30%), which this calculator does not cover.
Lenders are allowed a small number of exceptions to these limits each year (for example, lending above 4x income to a portion of first-time buyers), but these are at the lender's discretion, limited in number, and usually reserved for lower-risk applicants. This calculator applies the standard limits, not exception cases.
Worked example
A first-time buyer couple with a combined gross income of €90,000 and a deposit of €35,000 would have a maximum LTI-based loan of €360,000 (4 × €90,000). Because the deposit must cover at least 10% of the price, and the loan can fund at most 90%, their maximum affordable property price comes out to roughly €395,000 — constrained by whichever of the loan cap or deposit is more limiting.
Frequently asked questions
How much can I borrow for a mortgage in Ireland?
Under Central Bank of Ireland rules, first-time buyers can typically borrow up to 4 times their gross annual income, and second-time or subsequent buyers up to 3.5 times gross annual income, subject to a minimum 10% deposit. Lenders can grant a limited number of exceptions, so your actual offer may differ.
What is loan-to-income (LTI)?
Loan-to-income is the ratio between the size of your mortgage and your gross annual income. The Central Bank caps this to reduce the risk of unsustainable borrowing: 4x for first-time buyers, 3.5x for second-time and subsequent buyers.
Can I borrow more than 4 times my income?
Lenders are allowed a limited number of exceptions above the standard LTI limits each year, typically reserved for strong applicants. These are at the lender's discretion and not guaranteed — plan around the standard limits and speak to a broker about your specific situation.