Reviewed by: MyTaxRebate Team on 10 Mar 2026 | Authority: s.865 TCA 1997
Quick Answer
The vast majority of PAYE workers in Ireland are owed tax back at some point - and most do not know it. Under s.865 TCA 1997, you are entitled to a refund whenever the tax collected from your salary exceeds your actual tax liability for the year. The most common causes are unused tax credits, unclaimed medical or dental expenses, flat-rate employment expenses, and changes in employment during the year. In 2025, you can check and claim for 2022, 2023, 2024, and 2025 simultaneously. MyTaxRebate reviews your full four-year position and confirms your exact entitlement at no cost unless a refund is found.
What This Page Covers
- ✓How to tell if you are owed tax back from Revenue
- ✓The most common triggers for a PAYE overpayment
- ✓How the four-year backdating rule under s.865 TCA 1997 affects your claim
- ✓How to check your tax position without using your Revenue record yourself
- ✓What MyTaxRebate reviews when assessing your entitlement
- ✓What to do if you think you are owed money
Key Facts at a Glance
- ✓Legal right: s.865 TCA 1997 - Revenue must refund overpaid tax when correctly claimed
- ✓Most common triggers: job changes, unused credits, medical expenses, flat-rate allowances
- ✓Average refund from MyTaxRebate: €1,100 per claimant
- ✓Revenue does not automatically tell you if a refund is owed - you must claim
- ✓Four years available in 2025: 2022, 2023, 2024, 2025
- ✓2022 deadline: 31 December 2026 - don't let this year expire
- ✓Backdate up to four years - in 2025, overpayments from 2022, 2023, 2024, and 2025 are all claimable
How to Tell If You Are Owed Tax Back
The PAYE system in Ireland collects income tax in real time based on your employer's payroll records. It uses your allocated tax credits and standard rate cutpoint to calculate how much tax to deduct from each payslip. When these calculations are correct and all your credits are fully used, no refund arises. But in the majority of cases, something is either missing, miscalculated, or never claimed.
Under s.865 TCA 1997, you are legally entitled to recover any overpaid tax within four years. Revenue will not proactively tell you that you are owed money - the obligation to claim rests with you. If you have not reviewed your tax position in the past four years, there is a high probability that you are owed something.
The Most Common Triggers
Changing jobs mid-year: When you move from one employer to another, your cumulative tax credits may not transfer immediately. This often results in excess tax being deducted for several payslips. Working for part of the year: If you worked for only part of the tax year - due to starting or finishing employment, maternity leave, or illness - your annual tax credits are allocated for a full year but only used for the months you worked. Medical and dental expenses: Qualifying costs at a GP, hospital, pharmacy, physiotherapist, consultant, or dentist are relieved at 20%. These must be claimed - Revenue does not apply them automatically. Many workers accumulate €1,000 - €3,000 in qualifying costs across four years. Flat-rate employment expenses: Workers in nursing, construction, retail, teaching, and dozens of other professions are entitled to a standard deduction based on their occupation, without the need for receipts. This is one of the most commonly overlooked entitlements. Remote working relief: If you worked from home for any period from 2022 to 2025, you are entitled to claim a daily relief on utility costs. The Revenue-approved daily rate covers electricity, heating, and broadband proportionate to working days at home. Emergency tax: Workers placed on emergency tax (week-one or month-one basis) are overtaxed until Revenue restores cumulative basis. The excess is always refundable once your correct tax credit certificate is issued. Multiple jobs in the same year: Two PAYE sources in the same year often result in one employment being overtaxed because the second employer has no visibility of credits allocated to the first.
- Changing jobs mid-year: When you move from one employer to another, your cumulative tax credits may not transfer immediately. This often results in excess tax being deducted for several payslips.
- Working for part of the year: If you worked for only part of the tax year - due to starting or finishing employment, maternity leave, or illness - your annual tax credits are allocated for a full year but only used for the months you worked.
- Medical and dental expenses: Qualifying costs at a GP, hospital, pharmacy, physiotherapist, consultant, or dentist are relieved at 20%. These must be claimed - Revenue does not apply them automatically. Many workers accumulate €1,000 - €3,000 in qualifying costs across four years.
- Flat-rate employment expenses: Workers in nursing, construction, retail, teaching, and dozens of other professions are entitled to a standard deduction based on their occupation, without the need for receipts. This is one of the most commonly overlooked entitlements.
- Remote working relief: If you worked from home for any period from 2022 to 2025, you are entitled to claim a daily relief on utility costs. The Revenue-approved daily rate covers electricity, heating, and broadband proportionate to working days at home.
- Emergency tax: Workers placed on emergency tax (week-one or month-one basis) are overtaxed until Revenue restores cumulative basis. The excess is always refundable once your correct tax credit certificate is issued.
- Multiple jobs in the same year: Two PAYE sources in the same year often result in one employment being overtaxed because the second employer has no visibility of credits allocated to the first.
Check Your Claim
MyTaxRebate can review your position and guide the next step.
Using the Four-Year Window to Check All Years at Once
Under s.865 TCA 1997, you can check and claim for four years simultaneously. In 2025, a single review covers 2022, 2023, 2024, and 2025. This is the most efficient approach: reviewing one year at a time often misses the compounding effect of entitlements across all four years. A worker who had medical expenses in every year, a flat-rate allowance in every year, and went through a job change in one year may have significant refund entitlements in each of the four years that only become clear through a comprehensive simultaneous review.
How Revenue Calculates Whether You Are Owed Tax Back
Revenue calculates your final income tax position at year end by: taking your total income from all sources (PAYE and taxable social welfare), applying the applicable tax rates (20% on the standard rate band, 40% above), deducting all applicable tax credits (Personal Tax Credit, Employee Tax Credit, and any additional credits), and applying any expense reliefs (medical, flat-rate, remote working). The result is your actual liability. Where your actual liability is less than the PAYE deducted during the year, the difference is tax back - refundable under s.865 TCA 1997.
The Indicators That You Are Most Likely Owed Something
The most reliable indicators that you are owed tax back in Ireland include: having medical or dental expenses that were never claimed through Revenue; working in an occupation covered by Revenue's flat-rate expense list and never having claimed that allowance; changing employer at any point in the four available years; working for less than the full year in any of the four available years; or never having had a year-end review of your tax position for any of the four available years. The majority of PAYE workers who have not reviewed their position recently fall into at least one of these categories.
Beyond the obvious triggers - leaving a job or working part of the year - there are several less obvious situations that frequently give rise to tax back entitlements in Ireland. If you worked from home and paid for heating, electricity, or broadband without claiming the remote working relief, you may be owed a refund on those costs. If you changed your civil status during the year - marrying or entering a civil partnership - your credits may not have been updated promptly, resulting in overpayment. Similarly, if a dependent child left your household or a caring arrangement changed, adjustments may be owed.
Under section 865 of the Taxes Consolidation Act 1997, Revenue is required to refund overpaid tax once a valid claim is submitted within the four-year window. The simplest first step is to contact MyTaxRebate. Our team reviews your end-of-year statements across all four open years, comparing the tax paid against your true liability after all available credits are applied, immediately identifying any refund entitlement. If additional unclaimed credits such as medical expenses or tuition fees apply, we add these to your record and ensure the maximum refund is recovered on your behalf.
Check Your Claim
MyTaxRebate can review your position and guide the next step.
Tax Scenarios
Scenario 1: Worker Who Changed Jobs
A marketing executive moved from one company to another in June 2023. His new employer placed him on an emergency week-one basis for three months while Revenue updated his tax certificate. He overpaid €1,100 in income tax during those three months. He also had €640 in GP and prescription costs he had never claimed. MyTaxRebate identified both issues across the four-year review and recovered €1,228 in total.
Scenario 2: Part-Time Worker With Unused Credits
A part-time retail worker took a career break for eight months in 2022 to care for a family member. Her employer had been deducting PAYE as if she were working the full year. Her unused Personal Tax Credit of €1,875 and unused Employee Tax Credit of €1,875 for the months she was not working were both refundable. MyTaxRebate submitted the claim and recovered €1,620 - entirely from credits she was already allocated but never used.
Scenario 3: Professional With Flat-Rate and Medical
A secondary school teacher had never claimed her flat-rate expense allowance in four years of teaching. She also had €1,820 in qualifying medical costs across 2022 - 2025, including a hospital procedure and ongoing physiotherapy. MyTaxRebate identified both entitlements, submitted for all four years simultaneously, and recovered €2,040 - a combination of the flat-rate deduction (no receipts required) and 20% relief on the medical costs.
Common Mistakes To Avoid
- ✗Assuming your employer handles it: Your employer is responsible for deducting the correct tax each payslip. They are not responsible for identifying your unclaimed reliefs or checking whether you have been overtaxed. That responsibility lies with you.
- ✗Waiting until year end: You can claim mid-year for the current tax year and all available prior years. Waiting until December means losing months of unnecessary delay.
- ✗Checking only the current year: Many workers who think they owe nothing for 2025 discover they have been owed money for 2022, 2023, and 2024. Always review all four available years.
- ✗Not claiming flat-rate expenses because you don't have receipts: Flat-rate expense allowances are agreed between Revenue and trade unions and do not require receipts. Your occupation alone determines eligibility.
- ✗Letting the 2022 deadline pass: The 2022 tax year closes for claims on 31 December 2026. This year should be claimed urgently if not already done.
When This Does Not Apply
Key Takeaways
- ➤ review the tax position position position position for all four available years - 2022, 2023, 2024, and 2025
- ➤ Do not assume you are owed nothing - most PAYE workers who check find something
- ➤ Check for flat-rate expenses specific to your profession - no receipts are required
- ➤ Act before 31 December 2026 if 2022 has not been reviewed
- ➤ Start your review through MyTaxRebate - we assess your full entitlement and submit everything at once
Check Your Claim
MyTaxRebate can review your position and guide the next step.
Frequently Asked Questions
Am I entitled to a tax refund in Ireland?
Most PAYE workers in Ireland are entitled to at least some tax back if they have not reviewed their full tax position in the past four years. Under s.865 TCA 1997, you are legally entitled to recover any tax overpaid within four years. The most common triggers are unused tax credits, unclaimed medical expenses, flat-rate employment allowances, and income changes during the year. The only way to know for certain is to have your records reviewed - MyTaxRebate does this at no upfront cost.
How do I know if Revenue owes me money?
Revenue will not tell you if you are owed a refund - you must claim it. You can check by reviewing your tax credit certificates against your payslips for each available year, confirming whether any reliefs (medical, employment, remote working) were unclaimed, and checking whether your credits were fully applied during any period of job change or reduced income. Alternatively, you can complete our application and let MyTaxRebate identify any entitlement for you across the full four-year window.
What is the most commonly missed tax refund in Ireland?
The most commonly missed refunds in Ireland are flat-rate employment expense allowances and medical expenses. Flat-rate allowances are agreed between Revenue and trade bodies for specific occupations - nurses, teachers, construction workers, retail staff, and many others. They require no receipts and are applied based on your profession. Medical expenses are missed because many workers do not retain receipts and are unaware that pharmacy annual statements serve as a substitute. Both are fully claimable within the four-year window.
How much tax back will I get?
The amount varies depending on how many years are being reviewed, your income level, and what reliefs apply. The average refund processed by MyTaxRebate is approximately €1,100. Workers with multiple unclaimed reliefs across four years sometimes recover €2,500 to €4,000. Workers in straightforward situations may recover less. We provide an honest, specific figure based on your actual records before submitting - we never estimate or project figures without evidence.
How far back can I claim tax back?
Under s.865 TCA 1997, you can claim tax back for up to four years. In 2025, the available years are 2022, 2023, 2024, and 2025. The 2022 deadline closes permanently on 31 December 2026. Once a year passes outside the four-year window, Revenue cannot process any refund for it regardless of the amount owed. Claiming all four years simultaneously is the most efficient approach.
