Reviewed by: MyTaxRebate Team on 10 Mar 2026 | Authority: s.865 TCA 1997
Quick Answer
A P21 Balancing Statement (now issued electronically as a Statement of Liability) is Revenue's year-end calculation of your final income tax position for a completed tax year. It compares the income tax collected through PAYE during the year against your actual tax liability (after all credits). Where PAYE collected more than the final liability, the P21 shows a refund due. Where the final liability exceeded PAYE, it shows a balance owed. Under s.865 TCA 1997, refunds shown on a P21 (or identified through a review) can be claimed for up to four years. The critical limitation of the P21 is that it only reflects information Revenue already holds - unclaimed expense reliefs are not included. MyTaxRebate reviews the full position including all reliefs, typically producing a significantly larger refund than the P21 alone. The average refund is €1,100.
What This Page Covers
- ✓What a P21 Balancing Statement is and what it shows
- ✓When Revenue issues a P21 and how to request one for prior years
- ✓How a P21 refund differs from a proactive comprehensive claim
- ✓What the P21 does NOT include (unclaimed expense reliefs)
- ✓How to request a P21 for prior years under s.865 TCA 1997
- ✓How MyTaxRebate produces a larger refund than the P21 alone
Key Facts at a Glance
- ✓A P21 (Statement of Liability) confirms the final income tax position for a completed tax year
- ✓It compares PAYE collected vs actual liability after credits already on Revenue’s records
- ✓If PAYE > liability: a refund is shown; if liability > PAYE: a balance is owed
- ✓P21 does NOT include unclaimed expense reliefs (medical, flat-rate, remote working)
- ✓Under s.865 TCA 1997: refunds shown on P21s are claimable for up to four years
- ✓Revenue now issues Statements of Liability electronically through your Revenue record
- ✓Backdate up to four years - in 2025, claim for 2022, 2023, 2024, and 2025
What the P21 Shows
The P21 Balancing Statement is Revenue's calculation of your final income tax position for a given tax year. It shows: total income for the year (from all employers on Revenue's records), the tax credits applied (based on Revenue's records), the resulting income tax liability, and the total PAYE deducted by your employer(s). The difference between the PAYE deducted and the final liability is either a refund (PAYE collected too much) or an underpayment (PAYE collected too little). The critical limitation is that the P21 only reflects information Revenue already holds. If you incurred qualifying medical expenses that were never submitted, or if you are entitled to a flat-rate employment expense allowance that was never applied, the P21 will not reflect those reliefs.
When Revenue Issues a P21
Revenue issues the electronic Statement of Liability (the P21 equivalent) through your Revenue record when a worker requests a year-end review or when Revenue determines a review is required. For most PAYE workers in a straightforward employment situation, Revenue does not automatically issue a P21 each year - it is only triggered by a review request. This means that for most workers, the P21 and any refund it shows will only be produced if they actively request it.
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How to Request a P21 for a Prior Year
MyTaxRebate retrieves your Statement of Liability (P21 equivalent) on your behalf for any year within the past four years. As your appointed tax agent, we access your Revenue records, pull the relevant statement, and use it to calculate and submit your refund claim. Navigate to the relevant year, and request the Statement of Liability. Alternatively, when MyTaxRebate manages your review, we access this information directly through the agent portal and integrate it into our comprehensive four-year review. You do not need to navigate your Revenue record yourself.
Why the P21 Is a Starting Point, Not an End Point
A P21 (Statement of Liability) issued through your Revenue record reflects only what Revenue already knows about your tax position. It shows the income from employers (from payroll records), the credits already on your TCC, and any reliefs you previously submitted. It does not include: medical expenses you never submitted, flat-rate allowances you never claimed, remote working relief you never applied for, or additional credits you never applied for. A P21 showing a small refund (€150) or no refund is not the final word on your entitlement - it is the position based on incomplete information. MyTaxRebate adds all applicable reliefs and credits to produce a comprehensive claim that typically generates a significantly larger refund than the P21 alone.
Requesting Prior-Year Statements of Liability
Through your Revenue record, you can request a Statement of Liability (the P21 equivalent) for each year within the four-year window. These statements show the baseline position - credits on file and income from payroll records. MyTaxRebate uses these statements as a starting point for each year's review, then adds the additional credits and reliefs not already included to calculate the full entitlement under s.865 TCA 1997. Where a prior-year statement showed a refund that was never claimed, MyTaxRebate ensures that refund is included in the comprehensive four-year submission.
The end-of-year statement that replaced the P21 under PAYE Modernisation in Ireland is a more comprehensive and dynamic document than its predecessor. It is generated from the real-time payroll data submitted by all employers throughout the year, combined with Revenue's records of your credits and any additional claims you have made through your Revenue record. The statement covers your full tax year position in a single view, including income from all employments, social welfare income where applicable, and any taxable benefits received.
Where the old P21 was a static document issued by Revenue, the new end-of-year statement can be interacted with online - you can view it, add missing credits or expenses, and resubmit to generate an updated calculation before confirming. This interactivity makes it significantly easier for taxpayers to maximise their refund without the need for a separate amended claim. Once you confirm the statement in your Revenue record, Revenue processes the refund or any liability. Under section 865 TCA 1997, the same review process can be applied to the prior three tax years simultaneously, making it possible to settle multiple years in a single session.
The end-of-year statement that replaced the P21 under PAYE Modernisation in Ireland is a more comprehensive and dynamic document than its predecessor. It is generated from the real-time payroll data submitted by all employers throughout the year, combined with Revenue's records of your credits and any additional claims you have made through your Revenue record. The statement covers your full tax year position in a single view, including income from all employments, social welfare income where applicable, and any taxable benefits received.
Where the old P21 was a static document issued by Revenue, the new end-of-year statement can be interacted with online - you can view it, add missing credits or expenses, and resubmit to generate an updated calculation before confirming. This interactivity makes it significantly easier for taxpayers to maximise their refund without the need for a separate amended claim. Once you confirm the statement in your Revenue record, Revenue processes the refund or any liability. Under section 865 TCA 1997, the same review process can be applied to the prior three tax years simultaneously, making it possible to settle multiple years in a single session.
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Tax Scenarios
P21 Shows Less Than Actual Entitlement
A construction worker requested a P21 for 2023 through your Revenue record. The P21 showed a refund of €180, based only on his standard credits. A comprehensive review by MyTaxRebate identified his flat-rate construction expense allowance (not in the P21), €900 in qualifying medical expenses, and a remote working period in early 2023. Total refund on comprehensive review: €1,240 - nearly seven times the P21 figure.
P21 Shows No Refund But Comprehensive Review Does
A nurse received a P21 for 2024 showing no refund due. Her employer had correctly applied cumulative PAYE throughout the year. However, she had €2,200 in qualifying medical expenses and her nursing flat-rate allowance - neither reflected in the P21. When these reliefs were submitted through MyTaxRebate, Revenue revised the position to show a refund of €640 for 2024 alone. Combined across four years, total recovery: €2,480.
P21 Underpayment Offset Against Prior Refund
A professional received a P21 for 2023 showing an underpayment of €400 (from a small freelance project). She was worried about owing Revenue money. MyTaxRebate reviewed all four years and identified €1,840 in total refund entitlement from medical expenses and flat-rate relief. Revenue offset the €400 underpayment against the refunds, resulting in a net payment of €1,440. The underpayment was entirely absorbed by her refund entitlement.
Common Mistakes To Avoid
- ✗Assuming the P21 shows the full refund: The P21 only reflects information Revenue already holds. Unclaimed expense reliefs are not included. A comprehensive review almost always produces a larger refund than the P21 alone.
- ✗Not claiming a P21 refund because the amount seems small: A P21 refund of €100 may be the starting point for a €1,000+ comprehensive review when expense reliefs are added. Even small P21 refunds merit a full review.
- ✗Not reviewing prior years where no P21 was requested: If you never requested a P21 for 2022, 2023, or 2024, those years have never been formally reviewed. Under s.865 TCA 1997, you can still claim for all of them.
- ✗Thinking a P21 underpayment means no overall refund: An underpayment in one year can be offset against refunds from other years or from expense reliefs in the same year. Always review the full four-year picture.
- ✗Not acting on old P21 refund notices: If you received a P21 in a prior year showing a refund but never claimed it, the four-year deadline is still running. Revenue issues the P21 as a statement; it does not automatically process the refund. You must submit a claim.
When This Does Not Apply
Key Takeaways
- ➤ Request or review your P21 (Statement of Liability) for each of the four available years to understand your baseline position
- ➤ Understand that the P21 shows only what Revenue already knows - unclaimed expense reliefs are not included and must be submitted separately
- ➤ Use the P21 as a starting point - a comprehensive review covers credits AND all expense reliefs for the maximum recovery
- ➤ If a prior-year P21 showed a refund you never claimed, act before the four-year deadline passes
- ➤ Submit through MyTaxRebate - we use the P21 position as a baseline and add all applicable reliefs for the full four-year review
Check Your Claim
MyTaxRebate can review your position and guide the next step.
Frequently Asked Questions
What is a P21 Balancing Statement in Ireland?
A P21 Balancing Statement is Revenue's year-end calculation of your final income tax position for a completed tax year. It compares the total PAYE deducted by your employer(s) against your actual income tax liability after all credits are applied. If PAYE collected more than the final liability, the P21 shows a refund due. Revenue now issues this electronically as a Statement of Liability through your Revenue record.
Does a P21 include all my tax entitlements?
No. A P21 only reflects the information Revenue already holds - your payroll records, tax credits on file, and any reliefs already submitted. If you have qualifying medical expenses, flat-rate employment allowances, or remote working relief that have never been submitted to Revenue, these will not appear on the P21. A comprehensive review by MyTaxRebate includes all applicable reliefs in addition to the credits already on the P21.
How do I request a P21 for a prior year?
You can request a Statement of Liability (the electronic P21) through Revenue's your Revenue record portal for any year within the past four years. Log in to your Revenue record and navigate to the tax return or PAYE review section for the relevant year. Alternatively, MyTaxRebate accesses this information directly through the agent portal as part of our standard four-year review, without requiring you to navigate your Revenue record yourself.
If my P21 shows a refund, do I need to do anything?
Yes. A P21 showing a refund means Revenue has calculated that you were overpaid, but the refund is not automatically processed or paid until you submit a claim. Under s.865 TCA 1997, you have four years from the end of the tax year to claim the refund shown on the P21. If you received a P21 showing a refund for 2022 and have not claimed it, the deadline of 31 December 2026 applies. MyTaxRebate submits the claim and adds any additional expense reliefs to maximise the total.
What if my P21 shows an underpayment?
An underpayment on a P21 means your actual tax liability was higher than the PAYE collected, typically from additional taxable income not deducted through PAYE (rental income, freelance work). The underpayment is owed to Revenue. However, where you also have unclaimed expense reliefs for the same year, the relief may reduce or offset the underpayment. MyTaxRebate reviews both sides of the position to calculate the net position before any payment is required.
