Mortgage Interest Relief Ireland 2026: Tax Credits & Eligibility

Mortgage interest relief in Ireland has changed dramatically over the past decade. While homeowners once benefited from automatic tax credits that reduced monthly payments, today’s landscape is much narrower: the main relief scheme ended in 2012, and only a shrinking number of legacy cases remain. Buy-to-let landlords, however, continue to deduct mortgage interest as a business expense — a crucial factor in rental property cashflow.

This guide explains what mortgage interest relief exists in Ireland in 2026, who qualifies, and how to claim it if you’re among the small group still eligible.

What Was Tax Relief at Source (TRS)?

Tax Relief at Source was the primary mortgage interest tax relief scheme for Irish homeowners. Introduced in 2002 and expanded in subsequent years, TRS provided a tax credit on mortgage interest paid on a borrower’s principal private residence.

The relief worked automatically: your lender deducted the credit from your monthly payment and reclaimed it from Revenue. You didn’t need to apply separately once registered.

Key dates:

• Mortgages drawn down between 1 January 2004 and 31 December 2012 qualified for TRS
• Relief rates varied based on when you took out the mortgage and whether you were a first-time buyer
• The scheme closed to new entrants on 1 January 2013
• Final relief payments ceased for most borrowers between 2017 and 2020, seven years after drawdown

If you bought your home after 2012, you never qualified. If you bought between 2004 and 2012, your relief period has now ended.

Who Still Receives TRS Relief in 2026?

A very small cohort may still receive legacy TRS relief: borrowers who took out mortgages in late 2012 and who met strict qualifying conditions, such as unemployment-related extensions or specific restructuring arrangements during the financial crisis.

In practice, fewer than 5,000 borrowers nationwide continue to receive any TRS relief as of 2026. If you’re unsure whether you qualify, check your mortgage statement — relief appears as a line-item credit reducing your payment. You can also verify through Revenue’s MyAccount portal.

TRS relief rates (for remaining qualifying mortgages):

• First-time buyers who drew down in 2012: historically received relief at higher rates in early years
• Non-first-time buyers: lower relief rates
• All rates have tapered significantly and approach zero in final years

The scheme has effectively sunset. No new claims are processed, and by 2027 almost all remaining relief will expire.

Buy-to-Let Mortgage Interest Relief in 2026

While homeowner mortgage interest relief has disappeared, landlords with buy-to-let properties receive full tax relief on mortgage interest — not as a credit, but as a deductible expense against rental income.

How it works:

• You report gross rental income on your annual tax return (Form 11 for self-assessed taxpayers, or through PAYE if rental income is under €5,000)
• You deduct allowable expenses, including mortgage interest, management fees, repairs, insurance, and Local Property Tax
• You pay income tax (and USC and PRSI) only on the net rental profit

Since 2019, landlords can deduct 100% of mortgage interest paid on buy-to-let loans. This reversed a phased restriction introduced in 2017 that had capped interest deductibility at 85%.

Example:

• Gross rental income: €18,000 per year
• Mortgage interest paid: €8,000
• Other expenses (insurance, repairs, management): €2,500
• Taxable rental income: €18,000 – €8,000 – €2,500 = €7,500

You pay income tax at your marginal rate (20%, 40%, or a blend) on €7,500, not €18,000. For a higher-rate taxpayer, this saves €3,200 in income tax alone (40% of €8,000).

Claiming BTL Interest Relief

Landlords claim mortgage interest relief through their annual tax return:

1. Register as a landlord with the Residential Tenancies Board (RTB) — required before claiming any rental expenses
2. Keep records of all mortgage interest paid (annual statement from your lender)
3. Complete the rental income section of your Form 11 self-assessment return
4. List mortgage interest under allowable expenses
5. Revenue processes your return and calculates tax due on net rental profit

If you’re a PAYE employee with small-scale rental income, you can use Revenue’s PAYE Services to report rental income. However, most landlords with mortgaged properties will need to file a full Form 11.

Common mistakes:

• Failing to register with the RTB — unregistered landlords cannot claim any expenses
• Including capital repayment portions of mortgage payments (only interest is deductible)
• Claiming interest on a mortgage used to buy your own home, not a rental property
• Missing the October 31 filing deadline and losing provisional tax benefits

Mortgage Protection Insurance Tax Relief

While mortgage interest relief for homeowners has ended, you can still claim tax relief on mortgage protection insurance premiums — life cover that pays off your mortgage if you die during the term.

2026 relief terms:

• Relief available at your marginal tax rate (20% or 40%)
• Maximum annual premium eligible: €1,000 per person (€2,000 for joint policies)
• Claimed through Revenue’s online services or annual tax return
• Applies whether you’re a first-time buyer, mover, or switcher

This isn’t a credit reducing your insurance payment; it’s a refund you claim from Revenue after paying the premium. Most insurers provide an annual certificate showing the qualifying amount.

Other Mortgage-Related Tax Considerations

Beyond direct interest relief, several other tax issues affect Irish mortgage holders:

Stamp Duty

When you buy a property, you pay stamp duty to Revenue — not a mortgage cost, but a significant upfront tax. Rates in 2026:

• 1% on properties up to €1 million
• 2% on the portion above €1 million
• First-time buyers pay no stamp duty on properties up to €500,000

Capital Gains Tax (CGT)

If you sell a buy-to-let property, you’ll pay 33% CGT on any gain (sale price minus purchase price and improvement costs). Mortgage interest already deducted for income tax purposes cannot be claimed again against CGT.

Your principal private residence is exempt from CGT when you sell.

Local Property Tax (LPT)

All homeowners pay LPT, an annual charge based on your property’s market value. It’s not linked to your mortgage, but landlords can deduct LPT as an expense against rental income.

Why Did Mortgage Interest Relief End for Homeowners?

TRS relief was introduced during the property boom as a subsidy to encourage homeownership and help buyers afford rising prices. Critics argued it inflated demand and property values, making housing less affordable overall.

After the 2008 financial crisis, successive governments phased out TRS as a budget measure. The rationale: mortgage interest relief primarily benefited higher earners with larger mortgages, costing the State hundreds of millions annually while doing little to improve housing access.

Annual cost at peak (2008-2009): over €600 million

Closing TRS to new entrants in 2013 saved substantial revenue and redirected housing policy toward supports like the Help to Buy scheme (a cash rebate for first-time buyers, not interest relief) and the First Home Scheme (shared equity loans).

What Support Exists for Homebuyers in 2026?

While mortgage interest relief no longer exists, several schemes help Irish homebuyers:

Help to Buy Scheme

A tax rebate for first-time buyers purchasing new builds, worth up to €30,000 (10% of purchase price, capped). Not interest relief — a one-time payment toward your deposit.

First Home Scheme

A shared equity scheme where the State (and sometimes a lender) takes an equity stake in your home, reducing the mortgage you need. When you sell or after 30 years, you repay the equity share based on market value.

Mortgage Interest Rates Falling

Following ECB rate cuts through 2024-2026, Irish mortgage rates have dropped significantly from the 2023 peak. Lower rates reduce interest costs more effectively than tax relief ever did. Fixed rates in 2026 range from 3.0% to 3.8% for standard borrowers, down from 4.5%-5.5% in 2023.

How to Check If You Qualify for Any Relief

For homeowners:

1. Log in to Revenue’s MyAccount (www.revenue.ie)
2. Check “Tax Credit Certificate” — any remaining TRS relief will appear
3. Review your mortgage statement for “TRS credit” or “mortgage interest relief”
4. If you see neither, you don’t qualify

For landlords:

1. Confirm you’re registered with the RTB (www.rtb.ie)
2. Gather annual mortgage statements showing interest paid
3. File Form 11 by 31 October (for the previous tax year)
4. Include all rental income and expenses, including mortgage interest
5. Revenue will calculate your taxable rental profit

For mortgage protection insurance:

1. Obtain your annual insurance certificate (insurer will provide on request)
2. Log in to Revenue MyAccount
3. Navigate to “Manage Your Tax” → “Life Assurance Policies”
4. Add your policy details and claim relief

Practical Scenarios

Scenario 1: First-Time Buyer, 2026

Emma buys her first home in Cork for €350,000 with a €315,000 mortgage. She pays €900 per month, of which roughly €600 is interest at a 3.5% rate.

Tax relief available:

• None on mortgage interest
• She can claim Help to Buy (if buying new build) — max €30,000 rebate
• She can claim tax relief on her mortgage protection insurance premium (€400 per year premium = €80-€160 refund depending on tax rate)

Scenario 2: Buy-to-Let Landlord, 2026

Seán owns a rental apartment in Dublin. Annual rental income: €24,000. Annual mortgage interest: €9,600. Other expenses: €3,000.

Tax relief available:

• Deduct €9,600 mortgage interest + €3,000 expenses = €12,600 total
• Taxable rental income: €24,000 – €12,600 = €11,400
• Tax due at 40% rate: €4,560 income tax (plus USC and PRSI)
• Without interest deductibility: tax would be €9,600 on €24,000 gross income
• Annual saving: €3,840

Scenario 3: Legacy TRS Borrower, 2026

Aoife took out a mortgage in December 2012 as a first-time buyer. She qualified for TRS relief, which reduced her payment by roughly €80 per month in early years.

2026 status:

• Relief has now tapered to near zero (seven years elapsed by 2019; extended relief periods ended by 2025)
• Her tax credit certificate shows no remaining TRS entitlement
• She continues to claim relief on mortgage protection insurance only

Common Misconceptions About Mortgage Interest Relief

“First-time buyers get tax relief on their mortgage” False. No mortgage interest tax relief exists for mortgages taken out after 2012, regardless of buyer status.

“I can claim back the interest I’m paying” Not unless you’re a buy-to-let landlord. Owner-occupiers have no interest deduction or credit available.

“Switching my mortgage affects my tax relief” If you never qualified for TRS (post-2012 mortgage), switching changes nothing. If you had legacy TRS relief, switching may have ended entitlement — but by 2026 nearly all TRS relief has expired anyway.

“The government is bringing back mortgage interest relief” No such proposals exist in 2026. Political parties occasionally discuss targeted relief, but no legislation has been introduced or passed.

Future Outlook

Mortgage interest tax relief for owner-occupiers is unlikely to return. The policy consensus has shifted toward:

• Increasing housing supply to moderate prices
• Targeted schemes for first-time buyers (Help to Buy, First Home Scheme)
• Rent tax credits for tenants
• Maintaining BTL interest deductibility to prevent landlords exiting the market

For landlords, 100% interest deductibility is expected to continue. Any reduction would likely trigger further contraction in the private rental sector, worsening Ireland’s housing shortage.

Key Takeaways

Mortgage interest relief in Ireland in 2026 is a narrow benefit:

• Homeowners with mortgages taken out after 2012 receive no relief
• Legacy TRS relief for pre-2013 mortgages has almost entirely expired
• Buy-to-let landlords deduct 100% of mortgage interest against rental income — a substantial tax benefit
• Mortgage protection insurance remains tax-deductible for all borrowers
• First-time buyers should focus on Help to Buy and First Home Scheme supports, not interest relief

If you’re a landlord, ensure you’re claiming all allowable expenses including mortgage interest. If you’re a homeowner, your main focus should be securing the lowest mortgage rate available — rate reductions deliver far greater savings than historical tax relief ever did.

See also: Mortgage Rates Ireland 2026 | Help to Buy Scheme Ireland | First-Time Buyer Mortgages Ireland | Switching Your Mortgage in Ireland | Stamp Duty Ireland 2026