Do You Have to File a U.S. Return If a Casino Withheld Tax?

On this page

1. What the filing rule actually says
2. Why the casino’s withholding is the hinge
3. Not required to file is different from nothing to claim
4. Required filing versus refund filing, side by side
5. What proof of withholding goes with the return
6. Other things the filing rule does not settle
7. Where U.S. Tax Recovery fits in
8. Frequently Asked Questions

You won at a U.S. casino, the cage held back 30%, and you left with a payout receipt showing the amount. The next question is whether you still have to file a U.S. tax return. The IRS rules can mean no filing is required when the withholding covered the tax. That is a different matter from whether the amount withheld was correct, and filing is still the only way to claim back an overpayment. This article explains the difference between filing because you must and filing to get a refund, and what proof backs up a refund claim.

What the filing rule actually says

The rule sits in the IRS instructions for the nonresident return, in the part headed “Who Must File.” It covers a nonresident alien who was not engaged in a trade or business in the United States during the year, which is the usual case for a visitor whose only U.S. income came from a casino trip. Such a person must file only if two conditions are both met:

• They received U.S.-source income of the kind that is not connected with a U.S. trade or business, which includes gambling winnings.
• Not all of the U.S. tax they owe on that income was withheld from it.

That kind of income is taxed on the gross amount at flat rates. The two conditions are joined by “and.” Having that income does not, by itself, create a filing requirement. The requirement comes from a gap between the tax owed and the tax already withheld. If the full amount owed was withheld at the source, no return is required for that income.

The rule only describes when a return is required. It does not say a return cannot be filed for another reason, such as claiming back tax that was overpaid. That is covered below. For how the return fits together, see how Canadian casino winners claim a U.S. tax refund.

Why the casino’s withholding is the hinge

For U.S.-source income that is not connected with a U.S. trade or business, the tax is meant to be collected at the source. The payer takes it out before the money reaches you. A non-resident’s gambling winnings from a U.S. casino sit in this category, so the casino acts as the collector for the IRS.

At the cage, the casino usually withholds when a win is paid by hand, such as a slot jackpot that locks the machine. It takes the 30% rate the rule sets for this income and hands over a payout receipt. The casino reports the year’s withholding later on Form 1042-S. Some games work differently. Winnings from blackjack, baccarat, craps, roulette and the big-6 wheel are not taxed for non-resident aliens under IRC 871(j), as explained in why table games are not withheld like slots.

When the casino took the full 30% on the gross win, the tax at the flat rate and the tax withheld are the same amount. Nothing is left unpaid on that income, so the second condition is not met. The withholding decides which side of the line the winnings fall on.

The picture changes when withholding fell short. If a hand-paid win was paid out with less than 30% taken, or none at all, part of the tax owed was not withheld, and that can bring a filing requirement with it. So the useful question about any U.S. win is how much the cage actually withheld compared with what the rule says was owed.

Not required to file is different from nothing to claim

The filing rule answers one question: does a non-resident have to file? It does not answer a second one: was more tax withheld than the law requires? When the casino’s withholding covers all the tax owed, the rule is satisfied and the IRS expects nothing more. The IRS also has no way of knowing whether that withholding was too high. A return is what shows it. Without one, any overpayment simply stays with the IRS.

For a Canadian resident, an overpayment usually comes from losses. Article XXII(3) of the tax treaty between Canada and the U.S. allows a Canadian resident to deduct gambling losses against gambling winnings, to the extent U.S. law would allow a U.S. resident to do so. The 30% rate then applies to the net amount, and if that tax is lower than the withholding shown on Form 1042-S, the return claims the difference.

The size of the deduction depends on the tax year. For tax years beginning after 2025, IRC 165(d) as amended allows only 90% of wagering losses as a deduction. For a 2026 or later year, a Canadian whose losses matched their winnings would still have some taxable amount left. Losses also need support. The IRS standard is an accurate diary or similar record plus receipts, tickets or statements. How the treaty treats your gambling losses covers this in more detail.

Residents of most other countries are in a different position. Without a treaty provision like Canada’s, a non-resident generally cannot deduct gambling losses, except against winnings from the same session. For them, the amount owed is usually closer to what was withheld. The loss deduction is a Canadian treaty benefit and not a general rule for every visitor.

Required filing versus refund filing, side by side

Both situations come from the same rule, which asks one question about a non-resident’s income: was all the U.S. tax owed on it withheld at the source? The answer decides whether a return is required. It does not decide whether a return is worth filing. That depends on whether the tax actually owed comes out lower than what the casino took.

In the first situation, some income had less tax withheld than the rule calls for, or none at all. A win paid without withholding is one example. Here the filing requirement is triggered. The return reports the income, works out the full tax owed, credits whatever was withheld, and shows a balance to pay. The return exists to settle tax that was never collected.

In the second situation, the cage withheld 30% on every hand-paid win, so no return is required. A Canadian resident can still file to report the winnings and the treaty loss deduction, which can bring the tax owed below the amount withheld. The gap is an overpayment, and the return is the claim for it. For tax years beginning after 2025, only 90% of wagering losses count.

What proof of withholding goes with the return

A refund claim does not stand on the return alone. The IRS expects proof of the withholding, and for casino winnings that proof is Form 1042-S. It shows the income the casino paid and the U.S. tax it withheld from that income. Without it, a return claims a credit that nothing on paper supports. If you have more than one 1042-S for the year, for example from two casinos, each one matters, and the figures on the return need to agree with them.

The slip from the cage is a common point of confusion. On the day of a hand-paid win, the cage hands over a payout receipt showing the win and the amount held back. That receipt is not a 1042-S. Form 1042-S is an annual form: the casino issues one per recipient, income type and tax rate for the year, and furnishes it by March 15 of the following year. The receipt is worth keeping as a record, as explained in what to do with a withholding slip, but it does not take the place of the 1042-S. For a closer look at the form, see what Form 1042-S shows.

Other things the filing rule does not settle

Every nonresident return needs a taxpayer identification number. A Canadian who has never had a U.S. Social Security number generally uses an Individual Taxpayer Identification Number, or ITIN. U.S. Tax Recovery handles that application for you. The ITIN guide explains why one is needed.

How far back a claim can reach is a separate question. Each tax year with a Form 1042-S is its own return, and the time limits for claiming a refund depend on the tax year. They are checked case by case against the facts of that year. A non-resident with withholding from several earlier visits has each year looked at separately, as explained in claiming a refund for past years.

Where U.S. Tax Recovery fits in

U.S. Tax Recovery prepares and files the nonresident return for you, including the treaty loss deduction where a Canadian resident has losses to report, and arranges the ITIN application when you have none. The company does not obtain refunds. It puts the paperwork in order for the IRS to review.

U.S. Tax Recovery is an IRS Certifying Acceptance Agent, listed on the IRS’s Acceptance Agents directory for Canada. A Certifying Acceptance Agent can review an ITIN applicant’s identity documents and certify them, so the applicant does not have to mail an original passport to the IRS. This is a credential the IRS grants to agents who meet its requirements. It is not an IRS endorsement, and U.S. Tax Recovery is not affiliated with the IRS.

The IRS decides every claim. It reviews the return, may compare it with the Form 1042-S information it holds, and decides whether the deduction and the refund amount stand. It also sets the pace, which varies from case to case. See how a casino tax refund works for the overall process.

Frequently Asked Questions