What's different here
- Form W-2G, not 1099. Gambling winnings are reported on W-2G when they reach the threshold for the game: for 2026, $2,000 from a slot machine, bingo game or keno game (net of the wager), raised from $1,200 and $1,500 by Pub. L. 119-21 for payments after 2025 and indexed from 2027; $2,000 for other wagers if the payout is at least 300 times the wager; and $5,000 from a poker tournament (net of the buy-in), which did not change. Check IRS.gov/InflationAdjustment and the Form W-2G page each year.
- Two withholding rules. Regular gambling withholding at 24% applies to winnings over $5,000 from sweepstakes, wagering pools, lotteries and other wagers at 300-to-1, regardless of TIN. Backup withholding at 24% applies to reportable winnings (including slots, bingo and keno, which are otherwise exempt from regular withholding) when the winner does not furnish a TIN. The two never stack; one or the other applies.
- TIN collection at the point of payout. The W-2G is prepared before the money is handed over, so the cage needs the winner's name, address and TIN on the spot; Form W-9 or the W-2G itself serves as the certification. A winner who refuses a TIN is paid net of 24% backup withholding and the W-2G shows it.
- Identity overlaps with Title 31. Casinos already collect and verify identity for currency-transaction and suspicious-activity reporting under the Bank Secrecy Act; the TIN captured for the W-2G should be the same record, verified the same way, and screened against OFAC like any other customer.
- Prizes and promotions (drawings, tournaments with non-cash prizes, comps to non-employees) fall under 1099-MISC box 3 rules, not W-2G, and use the ordinary thresholds.
- Foreign winners are subject to 30% chapter 3 withholding on U.S.-source gambling winnings (with treaty exceptions for some countries and an exemption for certain table games), reported on 1042-S, not W-2G.
The W-2G is the only information return prepared while the payee is standing at the counter.
The forms a casino or sportsbook files
| Form | What it covers here | Threshold (2026 payments) | To the IRS | The trap in this sector |
|---|---|---|---|---|
| W-2G (slots, bingo, keno) | Machine and bingo jackpots; keno net of the wager | $2,000 (2026), indexed from 2027 | February 28 paper, March 31 electronic; winner copy January 31 | No regular withholding; backup withholding at 24 percent the moment the winner gives no TIN or gives one with the wrong number of digits (CCA 201246028). |
| W-2G (other wagers) | Sports, racing, sweepstakes, pools, lotteries at 300 times the wager | $2,000 and 300 to 1 (2026) | Same | Regular withholding at 24 percent once proceeds exceed $5,000, TIN or no TIN; the W-2G calculator works a payout. |
| W-2G (poker tournaments) | Tournament winnings net of the buy-in | More than $5,000 | Same | Reported, not withheld on, as long as the W-2G is filed; a player without a TIN is backup withheld. |
| 1099-MISC box 3 | Drawings, promotions, tournament prizes that are not wagers, comps to non-employees | $2,000 | February 28 on paper, March 31 electronically; recipient copy January 31 | A free-entry drawing is a prize, not a wager; noncash prizes are reported at fair market value. |
| 1042-S | Winnings paid to nonresident aliens | None | March 15 | 30 percent from the first dollar on sports and slot winnings; the 300-to-1 test does not protect a foreign winner (CCA 202547016); blackjack, baccarat, craps, roulette and big-6 are exempt by statute. |
| Form 945 | All gambling withholding, regular and backup | Annual; deposits on the semiweekly or monthly schedule | January 31 | Deposits follow the calendar day; a gaming day that crosses midnight may be used only when it deposits earlier (CCA 202449014). |
| Form 8300 or FinCEN CTR | Cash over $10,000 | $10,000 | 15 days | A casino over the Bank Secrecy Act's $1 million gross gaming revenue line reports gaming cash on the FinCEN currency transaction report; cash taken by its hotel, gift shop and banquet operations is still Form 8300 territory, as FinCEN's casino FAQs say, per the Form 8300 guide. |
The 945 fit checker ties W-2G box 4 totals to the Form 945 the IRS expects under the same EIN; the 945 matching program is what finds a casino whose W-2Gs show withholding its 945 does not.
The W-2G withholding calculator works a single payout: the threshold for the game and year, regular or backup withholding, and boxes 1 and 4.
Where a casino's notices come from
- The cage. The TIN is taken from a driver's license and a Social Security card, or from the player's card record, with a line forming behind the winner. Transposed digits and a maiden name on the card are the sector's mismatch pattern; the CP2100 for W-2Gs arrives in the spring like the one for 1099s, and the CP2100 guide applies without change.
- The players club. A loyalty record created years ago from a name as the patron wrote it, reused for every jackpot since. A casino that matches its players club file against IRS records once a year removes most of its W-2G mismatches before they are filed.
- Foreign patrons with U.S. paperwork. Park (below): a nonresident alien who signs a W-9 protects the casino's reliance but leaves the winnings in the 1042-S system; the ID the cage sees is what the file has to show.
- Excluded and self-excluded patrons. Winnings a state law confiscates before the patron has a right to them are not the patron's winnings and need no W-2G (CCA 201433015); a W-2G issued anyway is a wrong return.
- Promotions. Drawing and tournament prizes handled by marketing rather than the cage, reported on 1099-MISC with whatever name the entry form carried.
The checks that sit on top of the TIN
| Check | Source | When | What a failure means |
|---|---|---|---|
| Name/TIN match | IRS TIN Matching Program; W-2G is a covered form under Pub 2108A | Same day as the jackpot, before the W-2G file is built; annual sweep of the players club | A CP2100 line and a 972CG at $340 a return |
| Identity and Title 31 record | Bank Secrecy Act program: ID verification for CTRs and SARs, the casino's own know-your-customer file | At the cage and at account opening | Three captures of one person produce three sets of mismatches; FinCEN and IRS findings in the same exam |
| Sanctions | OFAC SDN list; state gaming commission exclusion lists | At the cage and on list updates | A blocked payout; a regulatory finding separate from the tax one |
| Residency and treaty documentation | Form W-8BEN with a foreign TIN or an ITIN; the W-8 validity calculator for expiry | Before a foreign winner is paid | 30 percent withholding owed by the casino on a payout it made in full (CCA 202547016) |
| Self-exclusion | State voluntary exclusion program list | Before the jackpot is paid | A W-2G for income the patron never had (CCA 201433015) |
Controls on the floor and in the back office
- Verify the name/TIN pair from the cage against IRS records the same day, before the W-2G file is built; a mismatch is far easier to fix while the player is still a customer.
- Track backup withholding by patron in the casino management system, deposit it with regular gambling withholding, and reconcile on Form 945.
- Use the same identity record for Title 31, OFAC screening and W-2G reporting; three separate captures of the same person produce three sets of mismatches.
- Sweep unmatched W-2G records before the January filing and solicit corrected TINs; the CP2100 for W-2Gs works exactly like the one for 1099s.
A worked example: the 972CG that asked for B-Notices
A casino files 180,000 Forms W-2G for 2026. Its spring CP2100 lists 5,400 mismatches, 3 percent.
Eighteen months later the 972CG proposes 5,400 returns at $340, $1,836,000, and the examiner asks for copies of the B-Notices sent to the 5,400 patrons. The casino sent none; a slot winner is not backup withheld on a mismatch, only on a missing TIN or one with the wrong number of digits (CCA 201246028), and a 972CG is not a B-Notice.
The response that works is the one Counsel described in CCA 201234025: the cage procedure (TIN plus two forms of ID at every jackpot, written down and followed), the signed W-2Gs or W-9s for the 5,400, and the backup withholding deposits for the patrons who gave no TIN at all. That is an initial solicitation at the time of payment and an exception to the annual solicitation rule, and it is reasonable cause under Reg. 301.6724-1 for incorrect TINs the casino could not have known were wrong. The penalty is waived on the documented returns; the undocumented ones, the promotions paid by marketing without the cage procedure, are paid.
Annual maximum at the $340 rate: $4,191,500, or $1,397,000 for a filer with average gross receipts of $5 million or less. Section 6722 charges the same amounts again for the payee statements. Returns due in 2027, Rev. Proc. 2025-32. Full tables: the 972CG estimator and the figures page.
Questions casinos and sportsbooks ask
A winner gives us a Social Security number that fails the IRS match. Do we withhold?
Not for that reason. Slot, bingo and keno winnings are backup withheld only when the winner gives no TIN or a TIN with the wrong number of digits (CCA 201246028); the mismatch is a CP2100 item to solicit. Regular withholding on other wagers applies above $5,000 regardless.
Does a 972CG mean we should have sent B-Notices?
No. The 972CG is a penalty notice answered with solicitation evidence and reasonable cause; the CP2100 is the notice that starts B-Notice and backup withholding duties. The 972CG guide and the CP2100 guide keep them apart.
A foreign visitor wins a slot jackpot. W-2G?
No. Winnings paid to a nonresident alien are 1042-S income, withheld at 30 percent from the first dollar unless a treaty says otherwise or the game is one the statute exempts (blackjack, baccarat, craps, roulette, big-6). The 300-to-1 test and the W-2G thresholds protect only U.S. persons (CCA 202547016). The foreign payee guide has the W-8BEN steps.
A foreign patron gave us a W-9. Are we liable for the 30 percent?
Your reliance on a W-9 you had no reason to doubt is protected (Park); the IRS pursues the patron. Keep the ID the cage saw, because a W-9 from someone presenting a foreign passport is a reason to doubt.
Our gaming day ends at 6 a.m. Can we deposit by gaming day?
Only where it deposits sooner than the calendar-day rule requires (CCA 202449014). The $100,000 next-day rule is measured by calendar day in Publication 15, and a gaming day cannot be used to delay a deposit.
A self-excluded patron hits a jackpot the state makes us confiscate. W-2G?
No, if the patron never had a right to the money under the state program (CCA 201433015). The W-2G reports winnings paid to the patron, and nothing was.
What the IRS and the courts have said about gaming payers
- Chief Counsel Advice 201234025: a casino that took the TIN and two forms of ID at every jackpot of $1,200 or more met an exception to the annual solicitation rule and acted in a responsible manner; the TIN collected at the time of payment is the solicitation.
- Chief Counsel Advice 201246028: examiners asked a casino protesting a 972CG for its backup withholding notices; Counsel said slot winnings are backup withheld only when the TIN has the wrong number of digits, and a 972CG is a penalty notice, not a B-Notice. The CP2100 starts withholding duties; the 972CG does not.
- Chief Counsel Advice 202547016: a casino that paid a nonresident alien's sports bet under 300 to 1 with no W-2G was right for a U.S. person and wrong for this one: the winnings were subject to 30 percent withholding and Forms 1042 and 1042-S from the first dollar.
- Park v. Commissioner, 136 T.C. 569 (2011), rev'd in part, 722 F.3d 384 (D.C. Cir. 2013) (docket record): a South Korean patron who gave a California casino a W-9 with his SSN was still taxed as a nonresident on his slot winnings; the W-9 protected the casino and became evidence against the patron. The D.C. Circuit later allowed per-session netting.
- Chief Counsel Advice 202449014: a tribal casino may measure the $100,000 next-day deposit rule by gaming day only where that deposits the withholding earlier than the calendar day would; Publication 15 recognizes no other convention.
- Chief Counsel Advice 201433015: a jackpot a self-excluded gambler must forfeit to the state gaming commission is not the gambler's income and needs no W-2G; the W-2G follows the money actually paid to the patron.
The reasonable cause and foreign payee topics of the finder hold these and their neighbors; the treaty claims guide and the treaty rate lookup cover the countries whose residents owe nothing on U.S. gambling winnings.