Under Section 865 of the Taxes Consolidation Act 1997, Revenue owes you a refund whenever the tax collected from your pay exceeds what you actually owed for the year. It doesn’t matter why the overpayment happened. What matters is that Revenue has no general obligation to tell you it happened. Roughly 530,000 PAYE workers a year never claim a refund they’re owed, according to Revenue’s own awareness figures, and the unclaimed total has run into hundreds of millions annually.
That gap exists because the PAYE system is built to collect tax automatically, not to check afterward whether it collected the right amount. Nobody at Revenue is reviewing your file to see if you missed a credit. The review only happens if you ask for it.
Why Revenue Doesn’t Just Tell You
Employers deduct tax through payroll based on whatever Revenue Payroll Notification is on file at the time, updated whenever your circumstances change. If that notification is wrong, out of date, or missing a credit you’re entitled to, too much tax gets deducted every single pay period, and it stays that way until someone corrects it. The correction almost always has to come from you.
An income tax return review through Revenue’s myAccount service, called Review Your Tax, generates a Statement of Liability that shows whether a given year is balanced, overpaid, or underpaid. Requesting one takes a few minutes. Most people never do it, because nothing in the ordinary PAYE process prompts them to.
The Credits Behind Most Overpayments
A single PAYE employee in 2026 is generally entitled to a Personal Tax Credit of €2,000 and an Employee Tax Credit of €2,000, a combined €4,000 taken directly off the tax otherwise owed for the year. Self-employed workers get an equivalent Earned Income Credit of €2,000 instead of the Employee Tax Credit. Both figures increased from €1,875 following Budget 2026.
These credits are meant to apply automatically once you’re registered with Revenue, but registration timing, a change of employer, or simply never having been set up correctly in the first place can mean one or both never made it onto your record for a given year. Getting the right tax services advice on which credits actually apply to your situation is usually the difference between assuming the system got it right and confirming it did.
What Actually Causes an Overpayment
A handful of situations account for most of the refunds sitting unclaimed.
Emergency tax hits anyone who starts a job before their employer has the correct Revenue Payroll Notification, and it’s taxed at a rate designed to be corrected later, not to be accurate at the time. Multiple employers in the same tax year often means the standard rate band and credits get split incorrectly between them. A job change partway through the year has a similar effect if the new employer isn’t given the full picture of what was already earned and paid.
Marriage or a civil partnership can shift a couple onto joint assessment, which raises the combined standard rate band and allows credits to move between partners, but only if someone actually applies for it. Unclaimed medical and dental expenses attract relief at 20%, and most people never submit the receipts because they don’t realise routine costs, GP visits, consultants, prescriptions, count. Remote working relief and flat-rate employment expenses for specific occupations go unclaimed for the same reason: nobody tells you they exist unless you go looking.
New arrivals to Ireland are a particular blind spot. Someone who started working partway through their first year here often has one or both standard credits missing entirely for that year, simply because registration didn’t happen before the first payslip landed. Anyone advising on expat tax matters in Ireland sees this pattern constantly in a client’s first year of PAYE employment.
The Four-Year Window Nobody Explains Clearly
A refund claim has to be made within four years of the end of the tax year it relates to. In 2026, that means 2022 through 2025 are still open. Once a year passes that four-year mark, the right to claim it disappears completely, not just the convenience of claiming it. There’s no late-filing surcharge involved because there’s nothing being filed late. The money is simply gone.
This cuts in the other direction too. If a Statement of Liability shows an underpayment rather than a refund, and the amount owed is under €6,000, Revenue generally collects it by reducing your tax credits over the following years rather than demanding a lump sum, and without interest attached. Requesting a review isn’t a one-way risk the way it can feel before you’ve actually done it.
If You’re Self-Employed, This Works Differently
Everything above describes the PAYE Statement of Liability process. Someone filing a tax returns return under self-assessment, a Form 11 rather than PAYE end-of-year reviews, calculates their own liability directly rather than having Revenue confirm a balance after the fact. Credits still apply, but there’s no automatic notification system to lean on at all. The obligation to get the figure right sits with the person filing from the start, not with a review requested afterward.
Frequently Asked Questions
How long does a refund actually take once it’s confirmed?
Revenue typically transfers a confirmed refund to the bank account on file within three to five working days of the Statement of Liability being issued, provided the bank details on record are correct.
Can I check more than one year at a time?
Yes. Statements of Liability can be requested separately for each of the four open years, and there’s no requirement to review them in any particular order.
What happens if I claim a credit I wasn’t actually entitled to?
Revenue reviews the claim against its own payroll and income records before issuing a refund, so an incorrect claim is generally caught and adjusted rather than paid out automatically.
Does requesting a Statement of Liability increase my chances of an audit?
No. It’s a routine self-service request most PAYE workers are entitled to make every year, not a flag that draws additional scrutiny.
Is there a cost to requesting a review through myAccount?
No. Reviewing your tax and requesting a Statement of Liability through Revenue’s own myAccount service costs nothing.
Checking Is the Only Way to Know
Four tax years currently sit inside the claim window, and each one closes permanently the moment it ages past four years old. A ten-minute review through myAccount either confirms everything was correct or surfaces money that’s been sitting with Revenue the whole time. For anyone whose situation involves more than a single, unchanged PAYE job across those years, a change of employer, a marriage, a year of self-employment mixed in, getting the start-up accounting or PAYE side of that history checked properly tends to catch more than a quick self-review would.
Revenue’s own guidance on requesting a Statement of Liability sets out the exact steps, and its page on how refunds are paid covers what happens once an overpayment is confirmed.