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Sports betting winnings are taxable federal income, but the IRS reporting and withholding rules only kick in at specific thresholds. Here is how bettors should understand it, with the limits and deductibility of losses, too.
How Federal Tax Applies to Winning Bets
The IRS treats sports wagering winnings as taxable income, just like lottery or casino jackpots. A sportsbook issues Form W-2G only when a win passes the reporting tests.
For sports wagers, a W-2G is required when the winnings are $2,000 or more and at least 300 times the wager.
But the IRS says betting winnings are always taxable, even when no Form W-2G is issued. If a bettor does not give the sportsbook a taxpayer ID on a reportable win, 24% backup withholding can apply.
When Sportsbooks Withhold for Tax
The IRS instructions tie 24% withholding for sports wagering to winnings, minus the wager, of more than $5,000 that are also at least 300 times the wager. When the payout is that high, the bookie or sportsbook must file Form W-2G and withhold 24% from the payout before paying the taxpayer.
But many sports bettors will not hit that $5,000 / 300-times threshold. The withholding rules will generally apply only to very high-roller winning bets, not to everyday winners.
So sportsbooks usually will not withhold for sports bet winnings. Regularly keeping betting records and an accurate year-end account of your betting activity is a good idea, because you are still on the hook for federal income tax on your winnings.
How To Deduct Sports Betting Losses
Bettors owe federal income tax on sports betting winnings, but they can often deduct sports betting losses. But that deduction for losses depends on itemizing expenses, not taking the standard deduction.
The IRS treats sports betting losses under the general gambling-loss deduction rules, not as a separate category.
And the IRS says gambling losses cannot be deducted for more than the amount of gambling winnings.
Starting January 1, 2026, the gambling-loss deduction is limited to 90% of losses under the One Big Beautiful Bill Act.
Worked Example
Consider a sports bettor who used a $50 bet to assemble a parlay that returned a $16,050 payoff.
The wager was $50 and the winnings are $16,000, or 320 times the stake, so the win passes both the $2,000 and the 300x tests and the sportsbook issues a W-2G. Because the winnings minus the wager also exceed $5,000, the sportsbook withholds 24% as well.
What Sports Bettors Need to Track
Importantly, this “payoff minus original wager” math still applies even if the bettor did not receive a Form W-2G. Even in that case, the IRS considers that full $16,000 taxable income.
It's a good idea for sports bettors to keep complete records of their bets. They can use that data to reconstruct their annual results, aggregating sportsbook account history, sports betting logs, or even handwritten notebooks.
Winnings from bonus bets and promotions can also count as income, so include them in the yearly total.
And while the IRS rules apply across the country, some states impose their own tax requirements on sports betting winnings. Betting across state lines makes tax planning more complicated, so bettors should get the right state tax guidance for their home address.
Tax on Winnings Without a W-2G
Expect to pay federal income tax on your sports betting winnings, and don't think that a missing Form W-2G means nothing, tax-wise.
When reporting your gambling losses, keep in mind that those can only be deducted if you itemize your tax return, and not for more than the amount of your winnings.
Limited sports betting data, of course, makes estimating yearly taxable gains and losses difficult. But bettors can work out their income from their sportsbook account history, including promotional winnings.
Detailed records are a must, because the exact federal and state tax treatment of betting winnings and losses varies by state and locale. Betting online or across state lines adds complexity, and a tax advisor might be a good investment.