Start with the regulatory limits
As of the review date, Central Bank mortgage measures generally limit first-time buyers to four times gross income and second or subsequent buyers to 3.5 times gross income. Both generally need a 10% deposit. Lenders have limited allowances and still make individual affordability decisions. Check the current Central Bank mortgage measures.
Then calculate your household limit
- Start with reliable monthly net income.
- Subtract essential living costs, childcare, transport and existing debt.
- Add ownership costs such as insurance, Local Property Tax, maintenance and management fees.
- Keep room for savings and irregular bills.
- Test the repayment at a higher interest rate and on one reduced income where plausible.
If the stressed repayment leaves no margin, lower the target even if a lender might approve more.
Use realistic inputs
Compare monthly repayment, total interest, term and rate assumptions. Do not count uncertain bonuses at full value. Do not use every euro of savings as the deposit: buying costs and an emergency reserve remain.
Model the repayment
Use the mortgage repayment calculator →
The result is an estimate, not approval or advice.
Primary sources
- Central Bank: Mortgage Measures, accessed 11 July 2026.
- CCPC: Applying for a mortgage, accessed 11 July 2026.
- CCPC: First-time buyer guide, accessed 11 July 2026.
Update triggers: Central Bank limits, lender affordability rules or consumer guidance changes.