On this page
- What Form W-7 is and where it fits in a casino refund claim
- Why the W-7 goes in with the return
- Why the casino-cage route does not fit Canadians
- Identity documents a Certifying Acceptance Agent can verify
- When an ITIN expires
- Renewing an ITIN with the return it is needed for
- What the W-7 does not decide
- Frequently Asked Questions
You won at a U.S. casino, the cage paid you less than the full amount because tax was withheld at the 30% rate the rule sets for non-residents, and now someone has told you about a W-7 form. That form is the application for an Individual Taxpayer Identification Number, or ITIN. A non-resident with no Social Security number needs one before the IRS can process a refund claim. This article explains what the W-7 is for, how identity is checked, why the casino-cage route does not fit Canadians, and what the form does not decide. U.S. Tax Recovery prepares the application and your return for you.
What Form W-7 is and where it fits in a casino refund claim
Form W-7 is the IRS form titled “Application for IRS Individual Taxpayer Identification Number.” An Individual Taxpayer Identification Number, or ITIN, is a nine-digit number that begins with 9. The IRS issues it to people who need a U.S. taxpayer identification number for tax purposes but cannot get a Social Security number. An ITIN is used only for federal tax reporting. It does not give the right to work in the United States, and it does not make anyone eligible for Social Security benefits.
Here is where it fits in a casino claim. When a U.S. casino pays a non-resident a win by hand, it usually withholds tax at the 30% rate the rule sets. The casino later reports the payment and the tax withheld on Form 1042-S. The way to ask the IRS for any of that withholding back is a U.S. federal return for non-residents, and the IRS needs a valid SSN or ITIN on it to process the return.
A Canadian resident who has never lived or worked in the United States usually has no Social Security number and generally cannot get one. The W-7 fills that gap. The application states why the number is needed, and it needs the applicant’s name, foreign address, date and country of birth, and proof of identity. More background on the number itself is in What Is an ITIN and Why Do Canadian Casino Winners Need One?
Someone who already holds a valid SSN or an unexpired ITIN does not need a new application for the claim. For everyone else, the application and the return travel together. How the return itself comes together is covered in Form 1040-NR: How Canadian Casino Winners Claim a U.S. Tax Refund.
Why the W-7 goes in with the return
The IRS instructions for Form W-7 say the application goes in together with the tax return for which the ITIN is needed. For a Canadian casino winner, that return is the nonresident return that reports the win and claims back the withholding. The application, the return and the supporting identity documentation reach the IRS as one package. A W-7 from someone who needs the number to file is not treated as a separate request that comes before the return.
The reason lies in what an ITIN is for. The IRS issues one to a person who has a federal tax reason to need it, and the attached return shows that reason. A return with a Form 1042-S attached, claiming a refund of withholding on a casino win, explains on its face why the applicant needs a number.
The package goes to a specific IRS unit that handles ITIN applications. That unit reviews the application and the supporting documents first. If it assigns a number, the return is then processed using that ITIN. The IRS sets the pace for both stages, and it varies from case to case. What happens after you file covers the stages that follow.
Why the casino-cage route does not fit Canadians
The W-7 instructions list several exceptions that let an applicant get an ITIN without attaching a tax return. One of them is for gambling. It covers a non-resident who claims a treaty-exempt or reduced withholding rate on gambling winnings, with the application handled by a gaming official acting as an IRS ITIN Acceptance Agent. In practice this happens at the casino, and the treaty rate can be applied to the payout itself, so less tax, or none, is withheld in the first place.
That route only works if a treaty actually gives a lower rate on gambling winnings. The tax treaty between Canada and the U.S. does not. Article XXII(1) gives Canadian residents no exempt or reduced withholding rate on gambling winnings arising in the United States, so a casino has no treaty rate it can apply at the cage. Some other treaties are written differently, which is why a visitor from another country may be offered this option when a Canadian is not. The UK-U.S. treaty comparison shows one example.
What Canadians do get from the treaty is Article XXII(3), which lets a Canadian resident deduct gambling losses against gambling winnings. That deduction is taken on the return, after the year’s winnings are known. It cannot be applied at the moment of a single payout. So a Canadian without a taxpayer identification number applies for the ITIN with the return, using the Form 1042-S as the record of what was withheld. The Article XXII(3) loss rules explain how that deduction is figured.
| Point of comparison | Casino-cage route for gambling winnings | ITIN applied for with the return (Canadian route) |
|---|---|---|
| Who it is built for | Residents of treaty countries whose treaty exempts or reduces U.S. tax on gambling winnings | Canadian residents, whose treaty gives no reduced withholding rate but allows a loss deduction on the return |
| Who handles the application | A gaming official acting as an IRS ITIN Acceptance Agent | The applicant, or a Certifying Acceptance Agent |
| When the treaty benefit applies | At the payout, through a lower or zero withholding rate | After the tax year, through the loss deduction on the return |
| Tax return attached to the application | Not required under the exception | Required, the return the ITIN is needed for |
| Withholding record used | Payout handled at the treaty rate by the casino | Form 1042-S showing the amount withheld for the year |
Identity documents a Certifying Acceptance Agent can verify
The W-7 instructions list the documents that can prove an applicant’s identity and foreign status. A current passport is the only document that proves both on its own, which is why most Canadian applicants use one. A Certifying Acceptance Agent can review these documents in person and certify them, so the original passport does not have to be mailed to the IRS.
A certified copy means one that the issuing agency itself has certified. A photocopy stamped by a notary does not meet that standard. The IRS also limits what an agent can verify. For example, an agent cannot certify a foreign military identification card, and for a dependent the agent can verify only a passport or a birth certificate. The agent reviews the originals and hands them back to the applicant immediately, so they do not stay with the agent and are not sent away.
U.S. Tax Recovery is an IRS Certifying Acceptance Agent, listed on the IRS’s Acceptance Agents directory for Canada. That listing is a credential to review and certify identity documents for ITIN applications. It is not an IRS endorsement, and U.S. Tax Recovery is not affiliated with the IRS. The IRS still decides the ITIN application and the return.
When an ITIN expires
An ITIN does not last forever. The IRS instructions set a usage rule: if an ITIN is not used on a U.S. federal tax return at least once in three consecutive years, it expires on December 31 of the third consecutive tax year. Once it has expired, the number has to be renewed before it can appear on a U.S. federal return again. The rule looks at whether the number was used on a return. Having an ITIN on file is not enough.
This matters for Canadian casino winners because many of them file a U.S. return only in a year when a casino withheld tax. A Canadian with no U.S. income in between has no reason to file, so a gap of several years between returns is common, and the ITIN can lapse quietly during that gap. No letter has to arrive for it to happen. The expiry follows from the rule itself.
Renewal keeps the same number and does not issue a new one, so earlier records stay tied to it. What the expiry changes is the order of the paperwork. The renewal has to be part of the next filing and cannot be treated as an existing number ready to use. This guide to expired ITINs walks through the situation in more detail. For returning winners in general, see Won again? Welcome back.
Renewing an ITIN with the return it is needed for
A renewal follows the same rule as a first application. It goes in together with the return that needs the number, and the IRS handles the renewal as part of that return. The identity documents follow the same standards as a first application. A returning winner whose number expired after a gap of three tax years without a federal return is in this position.
Some returning winners have more than one year to report, and a single renewal can cover the current year and earlier ones. Each return is still a complete return for its own tax year, with its own Form 1042-S. Whether an earlier year can still be claimed depends on that tax year and is checked case by case. We handle the renewal and the returns for you.
What the W-7 does not decide
Form W-7 does one job. It gives the IRS the identity details it needs to assign an ITIN: name, foreign address, country of citizenship and the reason the number is needed. Once the number is issued, the return can be processed under it. The W-7 says nothing about the winnings themselves. The amount won, the tax withheld on Form 1042-S and any treaty loss deduction are all reported on the return, and the return is what the IRS examines.
An issued ITIN is not a signal about the refund. Whether any of the withholding comes back, and how much, is decided by the IRS when it reviews the return and its supporting records. The IRS also sets the pace, which varies from case to case. One rule shapes the figures on the return itself: for tax years beginning after 2025, U.S. law allows only 90% of wagering losses as a deduction. The guide on how the treaty treats gambling losses explains the deduction.
Time limits work the same way. A single application can cover earlier-year returns, but that does not mean every past year can still be claimed. The time limits for a refund claim depend on the tax year involved, and they are checked case by case before a return is prepared. The article on claiming for past years covers how that review is done.
A preparer’s part in this is limited and specific. U.S. Tax Recovery is an IRS Certifying Acceptance Agent, listed on the IRS’s Acceptance Agents directory for Canada. In that role it prepares the return and the ITIN application, reviews original identity documents, and certifies them so the originals stay with their owner. It does not decide anything about the refund and is not affiliated with the IRS. The IRS makes every decision that follows.
Frequently Asked Questions
Do I need an ITIN to get my casino tax back?
In most cases, yes. A non-resident claiming back casino withholding files a U.S. nonresident return, and the IRS needs a U.S. taxpayer identification number on it. A Canadian without a Social Security number usually needs an ITIN, which is requested on Form W-7. Without a valid number, the IRS cannot process the return.
Can I send the W-7 in first and file the tax return later?
No. A W-7 for a casino refund claim goes in together with the return. The IRS issues an ITIN when it can see the return that needs the number.
Do I have to mail my original passport to the IRS?
Not if a Certifying Acceptance Agent verifies it. The agent examines your original passport and certifies to the IRS that it was seen and checked, so the passport stays with you. Without an agent, applicants send originals or copies certified by the issuing agency. U.S. Tax Recovery is an IRS Certifying Acceptance Agent, listed on the IRS’s Acceptance Agents directory for Canada.
I got an ITIN years ago for another win. Can I still use it?
It depends on whether it has expired. Under IRS rules, an ITIN that has not been used on a federal tax return at least once in three consecutive tax years expires. An expired ITIN is renewed together with the return it is needed for, and U.S. Tax Recovery handles that for you.
If my ITIN is approved, does that mean I’ll get a refund?
No. The W-7 only leads to an identification number. Whether any withholding comes back depends on the return itself, the Form 1042-S, your records of wins and losses, and the IRS’s own review. The IRS makes that decision, and it sets the pace, which varies from case to case.
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