Do Online Gambling Sites Report to the IRS? W-2G and 1099-K Rules

Yes. Licensed online gambling sites report your winnings to the IRS whenever a payout crosses a set dollar threshold, filing Form W-2G with the agency and sending you a copy.¹ For most games in the 2026 tax year that threshold is $2,000, up from $1,200 in prior years for slots and bingo.² Wins below the line don’t generate a form, but they are still taxable: the IRS treats gambling income like any other income, fully taxable in the year you receive it.³

What Triggers a W-2G in 2026

The One, Big, Beautiful Bill Act replaced the older patchwork of thresholds with a unified $2,000 minimum that will adjust annually for inflation.² What still varies is how each game measures that number.

Slots and bingo: $2,000 or more from a single play or game, measured on the gross payout without subtracting your bet.
Keno: $2,000 after subtracting the cost of the wager on that specific game.
Sports betting and other wagering: $2,000 in winnings that are also at least 300 times the amount wagered.²
Poker tournaments: $5,000 in net winnings, with the buy-in subtracted from the payout first.

The 300-to-1 ratio for sports betting matters more than people realize. A $100 even-money bet that pays $200 generates no W-2G, because $200 isn’t 300 times $100. A $10 parlay that pays $3,500 crosses both the dollar figure and the ratio, so the platform reports it. Straight bets on favorites rarely trigger W-2Gs; longshot parlays often do.

When the Platform Actually Withholds Tax

Reporting and withholding aren’t the same thing, and the gap catches people off guard. A site can issue a W-2G without taking a dollar out of your payout. Mandatory withholding at 24% only applies when winnings minus the wager exceed $5,000 and, for certain game types, the payout is at least 300 times the wager.⁴ Slots, bingo, and keno are exempt from that regular withholding; the 24% applies to sports bets, poker tournaments, sweepstakes, and similar wagering.²

A separate rule kicks in if you don’t provide a valid Social Security number or taxpayer identification number: backup withholding at 24% on any winnings that meet the W-2G threshold.² Giving the platform your information upfront avoids the backup rate, and it also means the site has what it needs to report you accurately.

When a big win comes with no withholding, you may need to make estimated tax payments during the year to avoid an underpayment penalty at filing time.³ A $15,000 slot jackpot in March with nothing withheld can become a nasty surprise the following April.

The 1099-K From Payment Processors

Online platforms typically move money through third-party payment processors, and those processors report separately. A processor must file Form 1099-K when payments to you exceed $20,000 across more than 200 transactions in a calendar year.⁵ The Bill locked in that threshold after years of proposed reductions.

A 1099-K shows gross transaction volume, not net winnings. Deposits you later withdraw, cashouts from losing sessions, and bonus funds can all inflate the number. If the form overstates your income, don’t ignore it. Report the amount shown and adjust it on your return, because the IRS matches the figure against your filing.

You Still Owe Tax When No Form Is Issued

This is where most recreational gamblers slip. No W-2G doesn’t mean no tax. Federal law requires you to report all gambling winnings, including amounts below the W-2G thresholds.³ Gambling income goes on Schedule 1 (Form 1040) and flows into your total income.⁶

All winnings means all of them. The $50 parlay hit, the $200 blackjack session, the free-play bonus you converted to cash. If you came out ahead in a session, that gain is taxable. Whether the site sent paperwork doesn’t change the math on your return.

Losses and the New 90% Cap

Losses can offset winnings, but only if you itemize on Schedule A. Because the 2026 standard deduction exceeds $15,000 for single filers, most casual players don’t itemize, and their losses provide no tax benefit. Even if you do itemize, you can never deduct more than the gambling income you reported.³

A significant change took effect for the 2026 tax year: the deduction is now capped at 90% of losses. Win $20,000 and lose $20,000, and you used to break even for tax purposes. Under the new rule you can deduct only $18,000, leaving $2,000 in taxable “phantom income” even though you didn’t come out ahead. The 90% cap also applies to related expenses that professional gamblers deduct, so it’s essentially impossible to fully zero out gambling income with losses now, no matter how good your records are.

Records That Hold Up

The IRS expects a diary or similar log of your activity. At a minimum:

Date and type of activity, such as “March 12 — online blackjack” or “June 4 — NFL parlay.”
The specific platform or app.
Amounts won and lost at the session level, not just annual totals.
Other people present, if relevant to live games.

Back the diary with supporting documents: W-2G forms, account statements, wagering tickets, bank records, and payout slips.⁷ Most sites let you download a full transaction history, which beats reconstructing a year from memory. Pull that report at least once a year and file it with your tax records. If the IRS questions your loss deductions, this is what stands between you and a full disallowance.

Offshore Sites Don’t Report — But You Still Do

Licensed U.S. platforms handle the paperwork. They verify identity, track winnings, withhold when required, and file W-2Gs. Failing to do this exposes them to fines and license loss, so the IRS already has a record of your significant wins before you file.

Offshore sites ignore all of that. They don’t collect your Social Security number, don’t issue tax forms, and don’t withhold. The income isn’t invisible; the reporting burden simply shifts entirely to you. A missing W-2G is not a defense.

Offshore accounts carry a second risk most players miss. Funds held on a foreign platform may count as a foreign financial account. U.S. persons must file a Report of Foreign Bank and Financial Accounts (FBAR) with FinCEN if the combined value of all foreign financial accounts exceeds $10,000 at any point during the year.⁸ Penalties reach $10,000 per non-willful violation and the greater of $100,000 or 50% of the account balance for willful ones. Criminal penalties can reach $250,000 and five years in prison. A $12,000 bankroll on an offshore poker site can quietly trigger the filing obligation.

What Happens If You Don’t Report

The IRS matches W-2G forms against your return. When the numbers don’t add up, the response scales with how the discrepancy looks.

For negligent underreporting or a substantial understatement, the accuracy-related penalty is 20% of the underpaid tax.⁹ If the IRS determines the failure was fraudulent, that penalty jumps to 75% of the underpayment attributable to fraud.¹⁰ Interest accrues on both the unpaid tax and the penalty from the return’s original due date.

In extreme cases the government can pursue criminal tax evasion. A conviction carries up to five years in prison and a fine of up to $100,000.¹¹ Prosecution is rare for casual underreporting, but not unheard of when amounts are large and the pattern looks intentional. The common outcome is a notice, back taxes, and a penalty that makes the original bill look modest.

A Note for Professional Gamblers

If gambling is your trade or business rather than a hobby, the rules shift. You report income and expenses on Schedule C, and net earnings are subject to self-employment tax at 15.3% on top of regular income tax. Business expenses like travel, lodging, data subscriptions, and tournament fees become deductible, though starting in 2026 those expense deductions are also subject to the 90% limitation that applies to wagering losses. Professional status isn’t about how much you win. Courts look at whether you pursue gambling full-time, keep business-like records, and depend on the income for your livelihood. Claiming Schedule C treatment without meeting that bar is a reliable way to draw audit attention.

1
Internal Revenue Service. About Form W-2G, Certain Gambling Winnings
2
Internal Revenue Service. Instructions for Forms W-2G and 5754
3
Internal Revenue Service. Topic No. 419, Gambling Income and Losses
4
eCFR. 26 CFR 31.3402(q)-1 – Extension of Withholding to Certain Gambling Winnings
5
Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill; Dollar Limit Reverts to $20,000
6
Internal Revenue Service. Schedule 1 (Form 1040)
7
Internal Revenue Service. Diary or Similar Record
8
Financial Crimes Enforcement Network. Report Foreign Bank and Financial Accounts
9
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
10
Internal Revenue Service. 8.17.7 Penalties/Additions to Tax in Computations
11
Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax