ChamTax is a free calculator that shows the actual after-tax take-home amount for US Powerball and Mega Millions jackpots. Here's how a US lottery win is taxed for an Irish resident — a flat 30% US withholding that's generally final, and €0 additional tax from Revenue.
Last updated: 2026-08-20
$1,000,000 win, Irish resident estimate
At a reference USD→EUR rate of roughly 0.86, that $700,000 take-home is about €602,000 — the calculator above converts your own amount using a live exchange rate.
No. Irish Revenue's long-standing position is that betting, lottery, and gambling winnings simply don't fall within any category of taxable income defined in Irish tax law — there's never been a provision bringing this kind of windfall into the tax net. Separately, Section 613(2) of the Taxes Consolidation Act 1997 confirms that winnings from betting aren't chargeable gains either. This isn't a foreign tax credit offsetting some computed Irish tax bill down to zero (the way it works for a few other countries this calculator covers); there's simply no Irish tax base for gambling or lottery winnings in the first place, whether the prize comes from the National Lottery, EuroMillions, or a US Powerball or Mega Millions jackpot.
This applies identically to domestic and foreign winnings — an Irish National Lottery jackpot and a US Powerball jackpot are treated exactly the same way. The only recognized exception is a "professional gambler" whose primary source of income is gambling itself, a structured, repeated activity — not the situation of someone who buys a ticket and wins. So an Irish resident who wins a US lottery jackpot owes €0 additional Irish tax on top of whatever the US withholds.
The US taxes nonresident aliens on lottery winnings at a flat 30% federal withholding rate (IRC §871(a)) — higher than the 24%-withheld/37%-top-rate treatment that applies to US residents, and withheld immediately when the prize is paid out. The US-Ireland tax treaty doesn't lower that withholding rate at the moment your prize is paid, so an Irish resident's US lottery win is withheld at the same standard 30% nonresident-alien rate as winners from most other countries this calculator covers — that's the amount you actually receive, and it's what this calculator's numbers reflect.
There may still be a way to reclaim some of it afterwards, though the evidence here is a notch less certain than for the UK, Japan, or France. The US-Ireland tax treaty's Article 22 ("Other Income") uses the standard OECD-style language assigning taxing rights over income not covered elsewhere in the treaty exclusively to the taxpayer's country of residence — confirmed directly from the treaty's primary text (irs.gov/pub/irs-trty/ireland.pdf). Unlike the UK, Japan, and France, where the US Treasury's official Technical Explanation explicitly lists "gambling" as an example of what Article 22 covers, that same explicit example wasn't found in the Ireland treaty's Technical Explanation. So the case for Irish residents rests on the treaty's own wording and its structural consistency with those other five "no domestic tax base" countries, rather than an explicit Treasury example — still a high-confidence, plausible basis to file a US Form 1040-NR and claim some or all of the 30% withholding back, but one notch less certain than for UK, Japanese, or French residents. This isn't automatic either way: no state lottery commission is known to apply this treaty exemption in real time at payout the way some casinos do for repeat foreign gamblers. A qualified cross-border tax adviser can confirm whether it's worth pursuing for your situation.
The prize itself is tax-free, but what you do with it afterwards follows the normal rules for investment income — a general rule that applies to any capital, not something specific to lottery winnings. If you put some of your winnings into an Irish deposit account, the interest that account earns is subject to DIRT (Deposit Interest Retention Tax), currently 33%, deducted automatically by the bank before the interest reaches you.
DIRT only applies to the interest your winnings generate after the fact — not the lottery prize itself, which stays outside the Irish tax net as explained above. Other investment vehicles (shares, funds, life-assurance products) can fall under different Irish tax rules entirely; a qualified Irish tax adviser can walk through the options for a large lump sum.
Moving a large lump sum from the US into an Irish bank account doesn't create any extra tax by itself. Under the Criminal Justice (Money Laundering and Terrorist Financing) Act 2010, banks must report to FIU Ireland (An Garda Síochána) and the Revenue Commissioners simultaneously whenever they know, suspect, or have reasonable grounds to suspect money laundering — the statute sets no fixed monetary threshold, it's a suspicion-based judgment call by the bank. The EU's €10,000 cash-declaration rule applies only to physical cash and bearer instruments carried across a border in person, not to bank wire transfers, so it isn't directly relevant here.
Your bank may still ask you to document the source of funds for a large, unusual inbound wire under normal customer due-diligence checks — keep your prize confirmation on hand to answer quickly.
See your own after-tax amount as an Irish resident
Open the calculator →The US withholds a flat 30% federal tax from a nonresident alien's lottery winnings (IRC §871(a)) before you ever see the money. On the Irish side, Revenue's long-standing position is that betting, lottery, and gambling winnings simply don't fall within any category of taxable income under Irish tax law — Section 613(2) of the Taxes Consolidation Act 1997 confirms that betting winnings aren't chargeable gains either. So a resident of Ireland owes €0 additional Irish tax on top of the US withholding. The 30% US withholding is the whole story for most Irish winners.
Yes. Revenue's non-taxation of gambling and lottery winnings applies equally to domestic prizes — the National Lottery's Lotto and EuroMillions draws, scratch cards, betting — and to a foreign win like a US Powerball or Mega Millions jackpot. The prize itself simply isn't treated as taxable income under Irish law, regardless of where the ticket was bought. The only real exception is a professional gambler whose primary source of income is gambling itself, which doesn't apply to someone who buys a ticket and wins.
The winnings themselves stay tax-free, but interest your money earns afterwards is a separate matter. Irish deposit accounts are subject to DIRT (Deposit Interest Retention Tax), currently 33%, deducted automatically by the bank from interest earned on savings held by Irish residents. This is a general savings-tax rule that has nothing to do with where the underlying capital came from — it only applies to the interest your winnings generate after the fact, not the lottery prize itself.
Possibly, via a US tax filing after the fact — it isn't automatic, and the evidence here is a notch less certain than for a few other countries. The US-Ireland tax treaty's Article 22 ("Other Income") uses the standard OECD-style language assigning taxing rights over income not covered elsewhere in the treaty exclusively to the taxpayer's country of residence, confirmed directly from the treaty's primary text (irs.gov/pub/irs-trty/ireland.pdf). Unlike the treaties with the UK, Japan, and France, the US Treasury's official Technical Explanation of the US-Ireland treaty wasn't found to explicitly list "gambling" as an example of what Article 22 covers — so the case for Irish residents rests on the treaty's own wording and its consistency with those other countries, not an explicit Treasury example. That's still a plausible basis to file a US Form 1040-NR and attempt to reclaim some or all of the 30% withheld, but it's less certain than for UK, Japanese, or French residents, isn't guaranteed, and is worth discussing with a cross-border tax professional before relying on it. Either way, the 30% is still what's withheld from your prize at the time you're paid — that's what this calculator's numbers show.
Possibly, but as routine due diligence, not a tax problem. Banks must report to FIU Ireland and the Revenue Commissioners whenever they know, suspect, or have reasonable grounds to suspect money laundering — there's no fixed monetary threshold in the statute. The EU's €10,000 cash-declaration rule applies only to physical cash carried across a border, not bank wire transfers. Your bank may still ask you to document the source of funds for a large, unusual inbound wire, so keep your prize confirmation handy.
This page is an informational simulator only and does not broker or facilitate lottery ticket purchases. Actual tax owed depends on individual circumstances and the exchange rate/tax law in effect at filing time — consult a qualified tax professional familiar with both countries.