California gambling tax works by treating your winnings as ordinary income on your state return, which means they stack on top of your wages and other income and get taxed at rates from 1% up to 12.3%, with an extra 1% mental health surcharge on taxable income above $1 million.1Franchise Tax Board. Gambling – Personal Income Types Federal tax applies on top of that. The one meaningful carve-out is the California State Lottery, which is exempt from state tax (though not federal). Everything else — casinos, card rooms, racetracks, raffles, fantasy sports, out-of-state lotteries — is on the table.
What California Taxes
If you’re a California resident, you owe state tax on gambling income no matter where you won it: a casino in Nevada, a racetrack in Kentucky, an online platform based overseas. Nonresidents owe California tax only on winnings sourced within the state.2Franchise Tax Board. Withholding on Nonresidents
Non-cash prizes count too, at their fair market value.3Internal Revenue Service. Topic No. 419, Gambling Income and Losses Win a $35,000 car at a casino promotion and you owe tax on $35,000, even though no cash changed hands. Many winners end up selling the prize to cover the bill.
The California Lottery Exemption
Winnings from the California State Lottery — SuperLotto Plus, Powerball, and Mega Millions tickets purchased in California — are exempt from California state income tax.1Franchise Tax Board. Gambling – Personal Income Types Federal tax still applies, and the California Lottery withholds federal tax from larger prizes.4California State Lottery. FAQs – Are My California Lottery Prizes Taxable? On your California return, you subtract those winnings on Schedule CA (540) to remove them from state taxable income.5Franchise Tax Board. 2025 Instructions for Schedule CA (540)
The exemption applies only to the California Lottery. A winning Powerball ticket bought in Nevada is fully taxable on both your federal and California returns.
A Note on Sports Betting
Sports betting is not legal in California as of 2026. Voters rejected both Proposition 26 and Proposition 27 in November 2022, and no new ballot measure has qualified since. If you place bets through an offshore or out-of-state platform anyway, those winnings are still fully taxable; the illegality of the activity does not exempt the income.
How Much You’ll Actually Pay
There’s no flat gambling tax rate in California. Your winnings pile onto whatever else you earned that year, and the combined total determines where you land in the brackets.6Franchise Tax Board. 2025 California Tax Rate Schedules
Picture a single filer earning $70,000 in wages who wins a $50,000 poker tournament. Total income is now $120,000. The wages are taxed the same as before, but much of that $50,000 prize lands in the 9.3% bracket, which kicks in above roughly $72,700 for single filers. A $500,000 jackpot on top of the same wages would push a chunk of the win into the 11.3% bracket. The bigger the prize relative to your usual income, the harsher the marginal hit.
What the Casino Withholds
Withholding happens at two levels, and neither of them is your final tax bill. It’s a prepayment against what you’ll ultimately owe.
Federal Withholding: 24%
Gambling establishments withhold 24% for federal income tax when the payout minus your wager exceeds $5,000 on sweepstakes, wagering pools, lotteries, and certain parimutuel or sports wagers.7Internal Revenue Service. Instructions for Forms W-2G and 5754 (01/2026) If your actual marginal rate is above 24%, you’ll owe more when you file. If it’s below, you get a refund.
Failing to give the payer a valid Taxpayer Identification Number triggers federal backup withholding at 24%.8Internal Revenue Service. Publication 15 (2026), (Circular E), Employers Tax Guide
California Withholding: 7% for Nonresidents
California requires 7% withholding on California-sourced gambling winnings paid to nonresidents once total payments to that person exceed $1,500 in a calendar year.2Franchise Tax Board. Withholding on Nonresidents California residents generally don’t see mandatory state withholding on gambling winnings unless backup withholding is triggered.
California backup withholding also runs at 7%, with no minimum threshold and no waiver, if you don’t provide a valid TIN.9Franchise Tax Board. Backup Withholding The payer gives you Form 592-B documenting the state tax withheld, and you file it with your return to claim credit for the amount already paid in.10Franchise Tax Board. 2026 Form 592-B Resident and Nonresident Withholding Tax Statement
Reporting Your Winnings
You report all gambling winnings on Schedule 1 (Form 1040), line 8b, whether or not the gambling establishment gave you any paperwork.3Internal Revenue Service. Topic No. 419, Gambling Income and Losses That income then flows into your California Form 540 or 540NR.1Franchise Tax Board. Gambling – Personal Income Types
W-2G Thresholds for 2026
Starting in 2026, the IRS raised its reporting thresholds for inflation. The minimum for issuing a Form W-2G on slot machines and bingo is $2,000, up from the longstanding $1,200, and will adjust annually going forward.11Internal Revenue Service. Instructions for Forms W-2G and 5754 (Rev. January 2026) For keno, the $2,000 threshold applies after subtracting the price of the wager.
The threshold for getting a form is not the threshold for owing tax. A $500 blackjack win, a $1,900 slot hit, a $200 sports payout — all of it is taxable even without a W-2G. The Franchise Tax Board gets copies of every W-2G issued, so mismatches get flagged, but the legal obligation on unreported small wins is identical.
Deducting Your Losses
You can deduct gambling losses on both your federal and California returns, but only up to the amount of gambling income you report that year.3Internal Revenue Service. Topic No. 419, Gambling Income and Losses Gambling can never produce a net deduction. Won $10,000, lost $15,000? You deduct $10,000. The other $5,000 is gone, and it does not carry forward.
Losses go on Schedule A (Form 1040) as “Other Itemized Deductions,” so you have to itemize. For 2026, the federal standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly.12Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Itemizing only pays off if your total itemized deductions beat that number. California’s standard deduction is much smaller — $5,706 single and $11,412 joint as of 2025 — so some taxpayers who take the federal standard still itemize on their state return.13Franchise Tax Board. Deductions
Keeping Records That Hold Up
The IRS expects a contemporaneous diary or log of your gambling activity. This is where most loss deductions fall apart in an audit: people remember losing but cannot prove the specifics. Your log should capture:
- The date and the type of wager or game
- The name and address of the gambling establishment
- The names of anyone with you
- How much you won or lost in each session
Keep supporting documents alongside the diary: W-2G forms, wagering tickets, canceled checks, credit card records, and any payout slips.14Internal Revenue Service. Diary or Similar Record Players club statements help but rarely capture everything. A log updated the same day carries real weight. A spreadsheet rebuilt from memory years later does not.
When a Big Win Means Estimated Payments
A large jackpot can trigger a quarterly estimated tax obligation. Even after 24% federal and any 7% state withholding, you may owe more at tax time if your total income climbs into higher brackets. The IRS requires estimated payments for 2026 if you expect to owe at least $1,000 after withholding and credits, and your withholding won’t cover the smaller of 90% of your 2026 tax or 100% of your 2025 tax (110% if your 2025 AGI exceeded $150,000).15Internal Revenue Service. 2026 Form 1040-ES Estimated Tax for Individuals
The 2026 quarterly deadlines are April 15, June 15, September 15, and January 15, 2027. If you win midyear, you don’t backfill earlier quarters — you pay based on when the income was received. Skipping required payments produces an underpayment penalty even if you pay in full when you file.16Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
Splitting a Prize With Other People
When two or more people share a winning ticket, the one who collects the prize should fill out IRS Form 5754 before leaving the establishment. The form lists each winner’s name, address, TIN, and share.11Internal Revenue Service. Instructions for Forms W-2G and 5754 (Rev. January 2026) The casino then issues a separate W-2G to each winner.
Skip the form and the full amount gets reported under one Social Security number, leaving that person responsible for the entire tax bill and dependent on friends to pay their share back. One wrinkle to know: reporting and withholding thresholds are measured against the total prize before splitting, not each person’s cut. An $8,000 group win triggers withholding based on the $8,000, even if each of five people only walks away with $1,600.
Winning in Another State
California residents who gamble out of state can get taxed twice on the same winnings. Many states withhold their own income tax on nonresident gambling payouts. California gives you a credit for taxes paid to another state on the same income through Schedule S, attached to Form 540 with a copy of the other state’s return.17Franchise Tax Board. 2025 Instructions for Schedule S Other State Tax Credit
The credit cannot exceed what California would charge on the same income. If the other state’s rate is lower than California’s, you still owe California the difference. If the other state’s rate is higher, California covers its share but doesn’t refund the excess; that part is between you and the other state.
Professional Gamblers
The IRS treats people who gamble as a trade or business differently from casual players.3Internal Revenue Service. Topic No. 419, Gambling Income and Losses Professionals report income and expenses on Schedule C and can deduct business costs like travel, lodging, and tournament entry fees that casual gamblers cannot touch.
Qualifying takes more than frequent play. The IRS looks at whether gambling is your primary income source, whether you pursue it with regularity and continuity, and whether you treat it as a business with records, strategy, and a genuine profit motive. Casual gamblers who hit a bad year don’t qualify. For 2026, new federal rules cap the combined total of a professional’s losses and business expenses, making the status less favorable than it used to be. If you think you might qualify, the cost of getting the classification wrong justifies a conversation with a tax professional.