A casino win/loss statement can support your tax return, but the IRS does not treat it as sufficient proof of gambling losses on its own. To deduct losses, you need a contemporaneous gambling diary backed by tickets, receipts, and bank records; the win/loss statement sits alongside those as corroboration. And even with airtight records, a 2026 rule caps your deductible losses at 90% of what you actually lost, and only up to your winnings for the year.1Office of the Law Revision Counsel. 26 U.S. Code 165 – Losses
What a Win/Loss Statement Is and Why It Falls Short
A win/loss statement is a summary a casino or online platform generates from your loyalty or rewards card activity. It totals your tracked wagers and payouts for the year and gives you a net win or net loss figure. Most casinos make the statement available on request early in the following year.
The statement has two problems as standalone proof. First, it only captures play the casino’s system actually saw. Every hand of blackjack where you forgot to hand over your card, every cash bet at the craps table, every slot session without your player card inserted is invisible to the report. The IRS knows this, which is why it treats these statements as secondary evidence.
Second, the granularity is wrong. The IRS wants session-level detail: how much you won or lost on a specific date, at a specific game, in a specific place. A win/loss statement usually gives you one number for the year, or at best monthly totals. That does not satisfy IRS documentation standards under audit.
Keep the statement anyway. When your own records show an $8,000 loss at a particular casino and the casino’s statement lines up, the two together are stronger than either alone. The statement supports your case. It cannot carry it.
The Records the IRS Actually Wants
The IRS expects a detailed, contemporaneous diary or log of your gambling activity. “Contemporaneous” is the operative word. Notes recorded at or near the time of play carry far more weight than a spreadsheet you assembled the night before an audit. At a minimum, your diary should include:2Internal Revenue Service. Publication 529 – Miscellaneous Deductions
- The date you gambled and the type of wagering (slots, blackjack, sports betting, and so on)
- The name and address of the casino, racetrack, or platform
- How much you won or lost during each session
- The names of anyone with you at the gambling establishment
The diary is the backbone. Around it, the IRS expects supporting documents that confirm the entries: Form W-2G copies, wagering tickets, payment slips, canceled checks, credit card records, and bank withdrawal statements showing funds used for gambling.3Internal Revenue Service. Topic No. 419, Gambling Income and Losses The win/loss statement fits into this supporting layer.
Records by Game Type
The IRS specifies additional records depending on how you play:2Internal Revenue Service. Publication 529 – Miscellaneous Deductions
- Slot machines: the machine number and all winnings by date and time.
- Table games: the table number, plus any casino credit card data showing whether credit was issued in the pit or at the cage.
- Keno: copies of purchased tickets validated by the casino, plus credit and check-cashing records.
- Bingo: the number of games played, ticket costs, and amounts collected on winning tickets.
- Horse racing: the races, wager amounts, and amounts collected or lost; hold on to unredeemed tickets.
- Lotteries: ticket purchases, dates, results, unredeemed tickets, and any payment slips.
For online gambling and sports betting apps, export your transaction history regularly. Most platforms offer CSV downloads or detailed account statements. Treat these as digital equivalents of wagering tickets and keep your own diary alongside them, because the platform’s records will not capture everything the IRS looks for.
The 90% Cap Limits What Your Records Can Do
Even with a perfect diary, federal law now caps the gambling loss deduction at 90% of your actual losses, and that reduced figure can only offset gambling winnings, not other income.1Office of the Law Revision Counsel. 26 U.S. Code 165 – Losses The practical result: even if you break exactly even for the year, you still owe some tax.
Run the numbers. If you won $10,000 and lost $10,000, you report $10,000 in gambling income, but your deduction is 90% of your losses, or $9,000. That leaves $1,000 of taxable gambling income with nothing to offset it. If you won $10,000 and lost $15,000, 90% of your losses is $13,500, but the deduction is still capped at the $10,000 of winnings you actually reported. Gambling losses cannot reduce wages, investment income, or anything else.
Losses beyond your winnings for the year are gone. There is no carryforward to a future tax year.
You Have to Itemize to Claim Losses at All
The loss deduction is only available if you itemize on Schedule A instead of taking the standard deduction.3Internal Revenue Service. Topic No. 419, Gambling Income and Losses For 2026, the standard deduction is $16,100 for single filers, $32,200 for married couples filing jointly, and $24,150 for heads of household.4Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
If your mortgage interest, state and local taxes, charitable contributions, and gambling losses combined do not clear the standard deduction, claiming gambling losses produces no tax benefit at all. You still owe tax on every dollar of your winnings. A $3,000 jackpot is fully taxable; the $3,000 you lost chasing it may give you nothing back.
What Happens If You Rely on the Statement Alone
If you claim $8,000 in gambling losses and the only proof you can produce under audit is a casino win/loss statement, the IRS can disallow the entire deduction. You then owe back taxes on that $8,000 of income, plus a 20% accuracy-related penalty for negligence or a substantial understatement, plus interest running from the original due date.5Internal Revenue Service. Accuracy-Related Penalty A substantial understatement is one that exceeds the greater of 10% of the tax that should have been on your return or $5,000.
Unpaid tax also accrues a failure-to-pay penalty of 0.5% per month, up to 25%, with interest compounding daily.6Internal Revenue Service. Failure to Pay Penalty The combined hit is avoidable, but only with documentation kept as you play, not reconstructed after the fact.
Professional Gamblers and State Tax Rules Are Different
If gambling is your primary income source and you pursue it regularly to profit, the IRS may treat you as a professional. Professionals report on Schedule C as business income, which allows deductions for travel, lodging, and other business expenses. The trade-off is self-employment tax of 15.3% on net earnings,7Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) and the 90% cap still applies. The statute defines wagering losses to include any deduction incurred in carrying on gambling as a business, so travel, subscriptions, and other expenses all count toward the same ceiling.1Office of the Law Revision Counsel. 26 U.S. Code 165 – Losses
State taxes are separate from all of this. Most states with an income tax also tax gambling winnings, and some tax winnings without allowing any deduction for losses, so a state bill can outrun the federal one relative to your net results. If you gamble in a state where you don’t live, that state may withhold tax on your winnings. Check the rules of each state you play in.