How Much Can I Borrow for a Mortgage in Ireland?

Most buyers in Ireland run the same mental calculation — "we earn €80,000 combined, so we can borrow €320,000." That's the starting point. What actually makes it to your approval letter is often a different number, shaped by rules most first-time buyers only discover deep into the application process.

Here's what determines your real borrowing capacity before you start viewing properties.

The Central Bank Rules: Your Hard Limits

The Central Bank of Ireland sets the framework that every mortgage lender in the country must operate within. Two limits define the ceiling on what you can borrow.

Loan-to-Income (LTI) limit: As a first-time buyer, you can borrow a maximum of four times your gross annual income. For a couple with a combined salary of €85,000, the standard maximum mortgage is €340,000.

Loan-to-Value (LTV) limit: Lenders can advance a maximum of 90% of the property's purchase price. You must have at least 10% of the purchase price as a deposit from unborrowed sources.

These two limits work together. Your maximum mortgage is whichever of the following is smaller: four times your income, or 90% of the property value.

On a €400,000 property:

• 4 × €85,000 income = €340,000 maximum (LTI limit)
• 90% of €400,000 = €360,000 (LTV limit)

The binding constraint is the LTI limit — €340,000. The remaining €60,000 must come from your deposit.

LTI Exceptions: How to Borrow Beyond Four Times Your Income

Lenders have a "flexibility allowance" that lets them exceed the 4x LTI limit for a portion of their lending. Up to 15% of each lender's total first-time buyer loan volume can go to borrowers at up to 4.75 times gross income — and in some cases, lenders will stretch to 5x for very strong applicants.

If our couple earning €85,000 secured a 4.75x exception, their mortgage ceiling rises to €403,750 — a meaningful difference in Dublin's market.

The catch: exceptions are not easy to obtain and are not guaranteed at the approval in principle stage. Many lenders will not formally grant an LTI exception until you are "sale agreed" on a specific property. This creates an uncomfortable situation where you're bidding on homes your standard approval doesn't cover, hoping the exception comes through once a seller accepts.

To have any chance at an exception, you need an impeccable six months of financial history — consistent savings, rent payments that demonstrate mortgage-readiness, zero overdraft fees, no payday loans, and ideally, no outstanding personal loans or car finance.

The Stress Test: What It Does to Your Borrowing Capacity

Your lender doesn't just assess whether you can afford the mortgage at the rate you're being offered today. They apply a stress test that simulates a 2% interest rate increase applied immediately. This test typically reduces your maximum borrowing capacity by around 23%.

In practice, your lender calculates what your monthly repayments would be if rates rose by 2%, then checks whether you can still service that stressed repayment. If you can't, your maximum mortgage is reduced until the stressed figure is affordable.

Two additional thresholds apply:

Mortgage Servicing Ratio (MSR): Your mortgage repayments (at the stressed rate) must not exceed 50% of your net monthly income.

Net Disposable Income (NDI): After the stressed repayment and other committed costs, you must have a minimum income left to live on. Lenders typically require around €1,400 per month NDI for single applicants and €1,900 per month for joint applications. High childcare costs can push applicants below this threshold even when gross incomes look comfortable.

Geographic Realities: Why LTI Limits Hit Differently by County

The 4x LTI rule creates very different barriers depending on where you're buying.

In Dublin, where the median house purchase price is €500,000, a couple needs a combined gross income of approximately €112,500 and a €50,000 cash deposit to buy at that median price under standard limits. That's a mortgage of €450,000 (90% of €500,000) divided by 4 = €112,500 required income.

In County Donegal, where the median purchase price is €198,000, the required income for a 90% mortgage of €178,200 is just €44,550. The same rules apply nationally, but they're far less constraining outside major cities.

This is why the First Home Scheme and the Local Authority Affordable Purchase Scheme exist — they're specifically designed to bridge the gap in high-cost urban markets where standard Central Bank limits fall short of realistic purchase prices.

How the Help to Buy and First Home Scheme Affect Your Calculation

Both the Help to Buy (HTB) refund and the First Home Scheme (FHS) equity contribution count as "unborrowed equity" — they satisfy the LTV deposit requirement without being counted as debt in the LTI calculation.

A buyer with a combined income of €80,000 and a maximum mortgage of €320,000 (4x) who receives a €30,000 HTB refund as deposit can purchase a home for €350,000. Without HTB, they'd need €35,000 in cash savings for the deposit. With HTB, they may only need €5,000 in cash if the tax refund covers the rest of the 10%.

If they're still short of their target purchase price, the FHS can contribute up to 20% of the price (reduced from 30% because they're using HTB simultaneously), bridging the remaining gap without adding to LTI debt.

Preparing Your Application: The Six Months That Matter

Lenders review the six months of bank statements immediately preceding your application. During this period:

• Your savings balance should be growing consistently each month, not spiking just before you apply
• Rent payments demonstrate your ability to service a regular monthly commitment — ideally at or above the mortgage repayment you're seeking
• Label your house savings account clearly as a "House Fund" — this signals intent to underwriters
• Keep a separate €500–€1,000 buffer account so that unexpected expenses don't dip into your savings history
• Clear personal loans and car finance before applying if possible — they reduce your NDI and can sink an otherwise strong application

For joint applications, both partners' financial histories are assessed as a single unit. Both accounts must be clean.

The Ireland First-Time Home Buyer Guide includes a borrowing capacity worksheet that walks through your LTI limit, stress test impact, and NDI calculation — so you know your real ceiling before approaching a single lender.

See more Ireland guides →