Reviewed by: MyTaxRebate Team on 10 Mar 2026 | Authority: s.865 TCA 1997
Quick Answer
The deadline to claim tax back in Ireland is four years from the end of the relevant tax year, as set by s.865 TCA 1997. In 2025, you can claim for the tax years 2022, 2023, 2024, and 2025. The most urgent deadline is 31 December 2026 - the last day to claim for the 2022 tax year. After that date, any 2022 overpayment is permanently lost. Revenue cannot and will not make exceptions to this rule. If you have not reviewed your 2022 tax position, this is the most time-sensitive action you can take in 2025.
What This Page Covers
- ✓The legal deadline for claiming tax back in Ireland
- ✓Which years are still within the four-year window
- ✓When the 2022 deadline closes and why it is urgent
- ✓What happens if you miss the deadline
- ✓How to claim before each deadline using MyTaxRebate
Key Facts at a Glance
- ✓Legal basis: s.865 TCA 1997 - four years from the end of the tax year
- ✓2022 deadline: 31 December 2026 - most urgent, closes in less than 2 years
- ✓2023 deadline: 31 December 2027
- ✓2024 deadline: 31 December 2028
- ✓2025 deadline: 31 December 2029
- ✓There is no grace period - Revenue cannot extend the deadline after it passes
- ✓Backdate up to four years - in 2025, claim for 2022, 2023, 2024, and 2025
- ✓Missing the four-year deadline results in permanent loss of the refund - there is no extension mechanism in normal circumstances.
- ✓Keep a personal calendar reminder to review the earliest open tax year before it closes each December.
- ✓Missing the four-year deadline results in permanent loss of the refund - there is no extension mechanism in normal circumstances.
- ✓Keep a personal calendar reminder to review the earliest open tax year before it closes each December.
- ✓Missing the four-year deadline results in permanent loss of the refund - there is no extension mechanism in normal circumstances.
- ✓Keep a personal calendar reminder to review the earliest open tax year before it closes each December.
The Four-Year Rule Under s.865 TCA 1997
Section 865 of the Taxes Consolidation Act 1997 (s.865 TCA 1997) establishes the statutory time limit for claiming a refund of overpaid income tax in Ireland. The rule is absolute: a claim for repayment must be made within four years of the end of the chargeable period (tax year) to which it relates. Revenue has no discretion to accept claims outside this window, regardless of the reason for the delay or the amount involved.
Deadline Dates for Each Available Year
In 2025, the available years and their individual deadlines are:
- 2022 tax year - deadline: 31 December 2026: This is the most urgent. If you have not reviewed your 2022 tax position, you have until the end of 2026 to submit a claim. Any overpayment from 2022 not claimed by that date is permanently forfeited.
- 2023 tax year - deadline: 31 December 2027.
- 2024 tax year - deadline: 31 December 2028.
- 2025 tax year - deadline: 31 December 2029.
Check Your Claim
MyTaxRebate can review your position and guide the next step.
How to Claim Before Each Deadline
MyTaxRebate submits claims for all four available years simultaneously. When you start a claim in 2025, we review 2022, 2023, 2024, and 2025 together in a single submission. This approach ensures no year is missed and no deadline is inadvertently passed while waiting to review one year at a time. Revenue processes multi-year submissions as separate annual claims, each within its own timeline, so there is no disadvantage to submitting multiple years at once.
The 2022 Deadline Is the Most Urgent
In 2025, the most time-sensitive year in the four-year window is 2022. The deadline for claiming tax back for the 2022 tax year under s.865 TCA 1997 is 31 December 2026. This gives workers who have not reviewed 2022 approximately 18 months from January 2025. While this seems comfortable, workers who defer the review often find the deadline arriving faster than expected. Beginning the review process now ensures adequate time for MyTaxRebate to review, submit, and receive a response from Revenue before the 2022 window closes permanently.
What Happens When the Deadline Passes
Under s.865 TCA 1997, the four-year deadline is an absolute statutory bar. Once the 31 December closing date passes for a tax year, Revenue cannot accept or process a refund claim for that year under any circumstances. There is no appeal mechanism, no Revenue discretion, and no exception for late claims regardless of the reason for the delay or the amount owed. For workers who have 2022 entitlements - unclaimed medical expenses, a flat-rate allowance, an additional credit - missing the 31 December 2026 deadline means those entitlements are permanently forfeited.
Rolling Deadline as Each New Year Opens
As each new year begins, a new year becomes available and the oldest year closes. On 1 January 2027, 2023 becomes the oldest available year and 2022 closes permanently. On 1 January 2028, 2024 becomes the oldest available year and 2023 closes. This rolling window means that workers who do not claim annually always risk losing the oldest year. The most efficient approach is a comprehensive four-year review every four years or so - reviewing all available years simultaneously ensures no year is ever lost within the review cycle.
Missing the four-year deadline for an Irish tax back claim is one of the costliest administrative oversights a taxpayer can make, because the right to a refund is extinguished permanently once the window closes. There is no mechanism under Irish law to extend the section 865 TCA 1997 deadline except in very narrow circumstances such as confirmed incapacity. This is why financial advisers consistently recommend that taxpayers check their your Revenue record each year and review open years promptly rather than allowing refund entitlements to age unnecessarily.
A practical approach is to set a personal annual reminder - for example, after submitting your end-of-year claim each October following the Budget - to also review the earliest year still within the four-year window and confirm you have claimed all available credits for that year before it closes. Revenue's your Revenue record makes this straightforward: select the year, check the statement, add any missing items such as medical expenses or flat-rate reliefs, and submit. A claim that takes fifteen minutes to file could recover hundreds of euros that would otherwise be permanently forfeited when the deadline passes.
Missing the four-year deadline for an Irish tax back claim is one of the costliest administrative oversights a taxpayer can make, because the right to a refund is extinguished permanently once the window closes. There is no mechanism under Irish law to extend the section 865 TCA 1997 deadline except in very narrow circumstances such as confirmed incapacity. This is why financial advisers consistently recommend that taxpayers check their your Revenue record each year and review open years promptly rather than allowing refund entitlements to age unnecessarily.
A practical approach is to set a personal annual reminder - for example, after submitting your end-of-year claim each October following the Budget - to also review the earliest year still within the four-year window and confirm you have claimed all available credits for that year before it closes. Revenue's your Revenue record makes this straightforward: select the year, check the statement, add any missing items such as medical expenses or flat-rate reliefs, and submit. A claim that takes fifteen minutes to file could recover hundreds of euros that would otherwise be permanently forfeited when the deadline passes.
Check Your Claim
MyTaxRebate can review your position and guide the next step.
Tax Scenarios
Scenario 1: Worker Who Almost Missed 2022
A retail worker contacted MyTaxRebate in October 2026 after a colleague mentioned tax back. She had not filed any claim since 2022. Her 2022 deadline was 31 December 2026 - just weeks away. MyTaxRebate submitted her four-year claim in November 2026, recovering €1,640 across all four years. If she had waited until January 2027, she would have lost her €380 2022 entitlement permanently.
Scenario 2: Emigrant Who Acted in Time
An Irish nurse emigrated to Australia in 2023. In 2025 she submitted a claim through MyTaxRebate covering her employment in Ireland in 2022, 2023, and 2024. Her flat-rate nursing expense allowance and medical costs across those years generated a refund of €2,100. Because she acted within the four-year window, all years were claimable. If she had waited until 2027 to start the process, the 2022 year would have been lost.
Scenario 3: Worker Who Waited Too Long
A construction worker came to MyTaxRebate in March 2025 wanting to claim for 2020 and 2021 as well as the more recent years. Under s.865 TCA 1997, claims for 2020 and 2021 were time-barred - the deadlines of 31 December 2024 and 31 December 2025 had either passed or were imminent. MyTaxRebate recovered €2,310 for 2022, 2023, 2024, and 2025, but approximately €850 in 2020 - 2021 entitlements could not be recovered due to the time limit.
Common Mistakes To Avoid
- ✗Deferring the claim year after year: Each year you defer reviewing your tax position, the oldest year in the four-year window expires. A worker who defers from 2022 to 2027 loses the 2022 year permanently. Reviewing annually - or at a minimum, covering all four years in one submission - prevents this loss.
- ✗Assuming the deadline is flexible: Revenue's four-year limit under s.865 TCA 1997 is set by statute. It is not a policy guideline. There is no process to request an extension, and Revenue officers cannot waive the requirement regardless of the circumstances.
- ✗Not treating 2022 as urgent: As of 2025, the 2022 deadline (31 December 2026) is the closest and most urgent. Many workers do not realise how quickly this closes. The deadline is not "a few years away" - it closes in December 2026.
- ✗Filing single-year claims instead of four-year reviews: Filing a claim for only 2024 and intending to return for 2022 and 2023 next year is a common mistake. A four-year review submitted at the same time recovers everything at once with no additional risk.
- ✗Assuming the claim takes too long to file before the deadline: MyTaxRebate can review and submit a four-year claim within days of receiving your application. Even if you start the process in October 2026, you still have time to meet the December 2026 deadline for 2022.
When This Does Not Apply
Key Takeaways
- ➤ Act on the 2022 claim now - the deadline of 31 December 2026 is closer than it appears
- ➤ Submit all four available years (2022 - 2025) in a single review rather than one year at a time
- ➤ Do not assume Revenue will remind you - the responsibility to claim is entirely yours
- ➤ Use MyTaxRebate to submit before any deadline - we can complete a four-year review within days
- ➤ Once a year passes outside the four-year window, the entitlement is gone permanently - there is no appeal
Check Your Claim
MyTaxRebate can review your position and guide the next step.
Frequently Asked Questions
What is the deadline to claim tax back in Ireland?
Under s.865 TCA 1997, the deadline to claim tax back in Ireland is four years from the end of the relevant tax year. In 2025, the available years are 2022, 2023, 2024, and 2025. The 2022 deadline is 31 December 2026. Once this passes, any overpayment from 2022 is permanently lost and Revenue cannot process the claim regardless of the amount owed.
Can I still claim tax back for 2022 in Ireland?
Yes. The 2022 tax year is still within the four-year window and can be claimed until 31 December 2026. If you have not yet reviewed your 2022 tax position, this is the most urgent year to act on. MyTaxRebate can review and submit your 2022 claim as part of a full four-year review within a few days of receiving your application. Do not wait - the 2026 deadline will arrive sooner than expected.
What happens if I miss the tax back deadline in Ireland?
Missing the four-year deadline under s.865 TCA 1997 means the overpayment for that year is permanently forfeited. Revenue has no legal basis to process claims outside the window and will reject them regardless of the reason for the delay or the amount involved. There is no appeals process specific to time-barred claims. This is the single most costly mistake PAYE workers make - and the most preventable.
Can I claim for multiple years at once?
Yes, and this is the most efficient approach. MyTaxRebate reviews all four available years simultaneously (2022, 2023, 2024, and 2025 in 2025) and submits a single comprehensive claim covering all of them. Revenue processes each year separately but accepts the multi-year submission in one filing. Claiming all four years at once recovers the maximum entitlement, prevents any year from being inadvertently missed, and requires no more effort from you than a single-year claim.
How do I claim tax back before the deadline?
Complete our online application and we handle the rest. MyTaxRebate reviews your four-year tax history, calculates the refund, and submits directly to Revenue as your appointed tax agent under s.865 TCA 1997. We can complete the full review and submission within days of receiving your application - well within any upcoming deadline. Revenue typically processes the claim within 5 to 15 working days. You pay nothing unless we recover a refund for you.
