Gambling and lottery winnings are fully taxable income the moment you win them, and a significant tax law change taking effect for 2026 makes the loss side of this equation noticeably less forgiving than it's been in decades.

All Winnings Are Taxable — With or Without a Form

Every dollar you win gambling — casino games, sports betting, lottery tickets, horse racing, poker tournaments, fantasy sports contests — is taxable income, reported on Schedule 1 of your return. This is true whether or not you receive a Form W-2G documenting the win; the absence of a form doesn't make winnings tax-free, it just means there's less automatic IRS visibility into that particular win (though you're still legally obligated to report it).

The New 90% Loss Limitation (Starting 2026)

This is the headline change from the One Big Beautiful Bill Act, and it's a genuinely significant shift: starting with the 2026 tax year, only 90% of gambling losses are deductible, even though the cap that losses can't exceed winnings remains unchanged. Previously, someone who won and lost the exact same amount in a year could fully offset the winnings with the losses and owe nothing on the activity. Under the new rule, that's no longer true.

⚠️ Example: you win $50,000 gambling in 2026 and also lose $50,000 — breaking even overall. Under the old rules, you'd owe nothing (full 100% loss offset). Under the new 90% rule, you can only deduct $45,000 of your $50,000 in losses, leaving $5,000 of taxable "phantom income" even though you didn't actually profit from gambling at all that year. This affects casual gamblers and professional gamblers alike, and there's active legislative discussion about repealing this provision before it fully takes hold — check current news, since this is one of the more contested parts of recent tax law and could change.

Casual (amateur) gamblers can only deduct losses at all if they itemize deductions rather than taking the standard deduction — someone who takes the standard deduction owes tax on 100% of their winnings with no loss offset whatsoever, regardless of how much they lost. Professional gamblers report gambling as a business on Schedule C and can deduct related business expenses, but the 90% cap now applies to those wagering losses and expenses too under the OBBBA changes.

Higher W-2G Reporting Threshold

Separately from the loss-deduction change, the reporting threshold for Form W-2G on slot machines, bingo, and keno winnings rises to $2,000 starting in 2026, up from the longstanding $1,200 (slots/bingo) and $1,500 (keno) thresholds, and will be indexed for inflation going forward. This is a reporting change only — it doesn't affect whether winnings below the new threshold are taxable (they still are), only whether the casino is required to issue a form and withhold documenting the win.

No Loss Carryforward — Ever

Unlike capital losses, which can carry forward to future tax years when they exceed the current year's gains, disallowed or excess gambling losses simply vanish. If your losses exceed your winnings for the year, or the new 90% cap disallows a portion of your losses, there's no mechanism to use that excess in a future year when you might have more winnings to offset it against — the loss is permanently forfeited.

Session-Based Recordkeeping

The IRS generally allows tracking gambling activity by "session" (a defined period of continuous play at a single venue or game) rather than by individual bet, which matters because your W-2G forms (documenting specific large individual wins) often don't match your actual net results if you track by session. Keep a contemporaneous log — dates, locations, games played, amounts won and lost per session — since the IRS frequently scrutinizes gambling-loss deductions and a diary substantially strengthens your position if questioned.

Lottery-Specific Considerations

Large lottery winnings are subject to mandatory federal withholding (24% for winnings over $5,000) at the time of payout, but your actual tax liability depends on your total income and marginal rate for the year — the withheld amount is simply a prepayment, reconciled against your actual tax owed when you file, the same as W-2 withholding. Many states also tax lottery winnings separately, and a few states don't tax lottery winnings from their own state lottery at all while still taxing winnings from other states' lotteries — check your specific state's rules if you've won a significant lottery prize.

Common Questions

Do I owe tax on fantasy sports or online betting winnings the same way as casino winnings? Yes — the tax treatment is the same regardless of the specific form of gambling; what matters is that it's a wagering transaction with a chance-based outcome, not the particular platform or game.

Can I deduct my losses if I don't itemize? No — this is one of the most commonly misunderstood gambling tax rules. Casual gamblers taking the standard deduction cannot deduct any gambling losses at all, even against gambling winnings.

Does the 90% loss limit apply retroactively to 2025 winnings? No — it applies to tax years beginning after December 31, 2025, meaning it first affects 2026 activity reported on the return you file in 2027; 2025 gambling activity still follows the prior 100%-offset rule.

💡 Report your net taxable gambling winnings (after applying the applicable loss limitation, if you itemize) as Other Income in the calculator to see how it affects your total federal tax.