Affordability guide · Ireland
Lenders don't just check you can afford your repayment today — they check you could afford it if rates rose by about 2%. Here's how the stress test works and how to maximise your result.
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The stress test is an affordability check that lenders are required to carry out under Central Bank of Ireland rules. They must be satisfied you could still afford your repayments if your interest rate were about 2% higher than the rate you're applying for.
It's a safety margin — protection against your repayment becoming unaffordable if rates rise during your mortgage.
An illustrative example (figures rounded, 30-year term):
The lender must be satisfied you could afford the €1,865, not just the €1,485 — even though €1,485 is what you'd actually pay.
Because affordability is judged at the higher stress rate, the stress test usually caps your borrowing below what the face rate alone would suggest — and often below the 4× (first-time buyer) or 3.5× (mover) income limit.
For example, two applicants each earning €70,000 can be offered very different amounts: the one with a car loan and a credit-card balance has less room at the stress rate, so their maximum is lower. Clearing commitments before you apply directly lifts the ceiling.
Alongside the stress test, lenders apply a net disposable income (NDI) check: after your stressed mortgage repayment and other commitments, you must have enough left to live on. As a rough guide, lenders look for in the region of €1,500–€2,000 per adult per month (more with dependent children).
It's the NDI test, as much as the income multiple, that decides many borderline cases — and it's exactly what our assessment models for you.
Enter your mortgage to see the repayment lenders test you against — your rate plus 2%.
Illustrative only — based on a standard annuity repayment at the rate and term you enter, not a quote or a lending decision. Lenders apply their own stress test and assess your full circumstances.
Warning: Your interest rate may increase, and the amount of your mortgage repayments may increase as a result.
Warning: You may have to pay charges if you pay off a fixed-rate loan early.
The stress test is an affordability check lenders must carry out: they confirm you could still afford your repayments if your interest rate were about 2% higher than the rate you're applying for. It's part of the Central Bank of Ireland's responsible-lending framework and is designed to make sure you have a cushion if rates rise.
Most lenders stress test at your applied rate plus roughly 2%. So if you're applying for a 3.75% rate, they check affordability at around 5.75%. The exact margin can vary slightly by lender, and some apply a minimum floor, but rate-plus-2% is the standard rule of thumb.
Yes. If your income, minus existing commitments, wouldn't comfortably cover the repayment at the higher stress rate while leaving enough to live on, the lender will reduce the amount it offers — or decline. The good news is that the stress test is predictable, so it can be planned for: we model it up front so there are no surprises.
Four main levers: reduce other monthly commitments (clear or lower loans and credit cards), increase your income (a pay rise, a second applicant, or documented overtime/bonus), choose a longer term to lower the monthly repayment, or put down a larger deposit to reduce the mortgage amount. Small changes to commitments often have an outsized effect.
It can. Because affordability is judged at the higher stress rate rather than the face rate, the maximum a lender will advance is often set by the stress test rather than the 4×/3.5× income limit. That's why two people on the same income can be offered different amounts — their commitments and the stress test make the difference.
See how the stress test shapes your maximum borrowing across our lender panel — free, no registration. Then plan your application with Francis.
Warning: If you do not keep up your repayments you may lose your home.
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