Housing and renting / credit

Mortgage Interest Tax Credit 2023-2026

If your mortgage interest in the claim year was higher than in 2022, and your outstanding balance on 31 December 2022 was between 80,000 and 500,000 euro, you may claim 20% of the increase. The maximum is 1,250 euro for 2023, 2024 and 2025 and 625 euro for 2026, when the credit is reduced to half.

Written by PAYEWise editorial team, plain-English tax writers working from Revenue sources. Tax review: pending appointment of a named tax-qualified reviewer. Reviewed 28 October 2026.

Page history (1)

28 Oct 2026: Mortgage Interest Tax Credit for 2026 recorded at the reduced maximum of 625 euro (half share of the increase) per Revenue guidance R12.(rules MI-2026-001)

All updates

Values by tax year

Year	Maximum	Rate	Status
2023	€1,250	20%	approved
2024	€1,250	20%	approved
2025	€1,250	20%	approved
2026	€625	20%	approved

Who qualifies

Mortgage on your principal private residence in Ireland.
Outstanding balance between 80,000 and 500,000 euro on 31 December 2022.
Interest paid in the claim year exceeds interest paid in 2022.
Compliant with .

Exclusions and pitfalls

Buy-to-let and holiday homes are excluded.
If interest did not increase, nothing is due.

How to claim, step by step

Income Tax Return for the year > Tax credits and reliefs > Mortgage Interest Tax Credit.
Upload interest certificates for 2022 and the claim year.

This checker provides guidance from your answers. Revenue decides whether a claim is accepted. You can claim directly for free using myAccount.

Documents to keep

Lender interest certificates for 2022 and the claim year
Evidence of the 31 December 2022 balance

Worked examples

Interest rose by 4,000 euro, 2025 qualifies

20% of 4,000 euro = 800 euro, below the 1,250 euro cap.

Large rise, 2026 qualifies

20% of 5,000 euro = 1,000 euro, capped at 625 euro for 2026.

Balance too small does not qualify

Balance 60,000 euro on 31 December 2022: below the 80,000 euro floor.

All examples use hypothetical people and figures.

Terms used here

Next steps

This guide is part of a later content wave and will be expanded with more detail after reviewer sign-off.

Sources and review

R12Mortgage Interest Tax Creditofficialchecked 2026-10-28

Last reviewed 2026-10-28 (awaiting sign-off by a named tax-qualified reviewer). Every factual tax rule on this page is backed by a dated Revenue source. Spotted an error? Use the contact page.

Do it

Claim through Revenue (free)

Priority P1. Reviewed 2026-10-28.

Year

Maximum

Rate

Status

2023

€1,250

20%

approved

2024

€1,250

20%

approved

2025

€1,250

20%

approved

2026

€625

20%

approved

Worked examples

Interest rose by 4,000 euro, 2025 qualifies

20% of 4,000 euro = 800 euro, below the 1,250 euro cap.

Large rise, 2026 qualifies

20% of 5,000 euro = 1,000 euro, capped at 625 euro for 2026.

Balance too small does not qualify

Balance 60,000 euro on 31 December 2022: below the 80,000 euro floor.

All examples use hypothetical people and figures.

Next steps

This guide is part of a later content wave and will be expanded with more detail after reviewer sign-off.

Sources and review

R12Mortgage Interest Tax Creditofficialchecked 2026-10-28

Last reviewed 2026-10-28 (awaiting sign-off by a named tax-qualified reviewer). Every factual tax rule on this page is backed by a dated Revenue source. Spotted an error? Use the contact page.