There are few better feelings than landing a big, long-awaited win at a casino. There’re also few quicker ways to suck the excitement out of that moment than somebody mentioning the IRS. Much to the dismay of all players, your income doesn’t now become the exception just because you won it on a slot machine rather than through your paycheck.
In the U.S., gambling winnings are generally classed as taxable income. That can include money won from online casino games, sports betting, poker nights, lotteries, raffles and horse racing, along with the fair market value of noncash prizes such as cars or trips.
Every day people get caught out because – even though nobody has sent you a tax form – your winnings still need to be reported. So, before celebrating that jackpot by spending every cent of it on champagne, steak, and lamborghinis, here’s what U.S. players need to know.
Report Your Gambling Winnings
One of the easiest mistakes to make is assuming you only need to tell the IRS about gambling income when you’ve received a Form W-2G, which, sadly, is not how it works.
For casual gamblers, the IRS says gambling winnings are fully taxable and should generally be reported on Form 1040 or 1040-SR using Schedule 1. This includes winnings that weren’t reported to you on a W-2G.
Suppose you win several smaller amounts throughout the year without ever triggering a W-2G. Those winnings don’t suddenly become invisible for tax purposes simply because there isn’t a form attached to them.
This is one reason keeping your own records matters rather than relying entirely on whatever paperwork arrives around tax season.
What Is a W-2G?
Think of Form W-2G, Certain Gambling Winnings, as one of the main tax documents associated with larger or otherwise reportable gambling payouts.
Casinos and other payers issue the form when winnings meet applicable reporting or withholding requirements. Those requirements vary according to the type of gambling, the amount won and, for some wagers, the relationship between the payout and original bet.
The form records information including your reportable winnings and any federal income tax already withheld. If tax was withheld, you’ll want to make sure that amount is correctly reflected on your return.
The important thing to remember is that a W-2G doesn’t decide whether gambling income exists. It reports certain winnings to you and the IRS. No W-2G doesn’t automatically mean no tax obligation.
Can You Deduct Your Gambling Losses?
Potentially yes, but this is where things get a little more complicated. Casual gamblers generally claim eligible gambling losses as an itemized deduction on Schedule A, rather than simply subtracting losses from winnings and reporting whatever is left. In other words, you need to keep the two figures separate.
There’s also an important new rule for 2026. The IRS states that the gambling-loss deduction is limited to the lesser of 90% of your gambling losses or your gambling winnings.
For example, say you had $10,000 of gambling winnings and $10,000 of gambling losses during 2026. You shouldn’t assume those automatically cancel each other out for federal tax purposes. Under the new limitation, only 90% of those losses would generally be deductible, subject to the applicable rules.
That’s a big change, particularly for frequent players, and a good reason to get professional tax advice if substantial sums are involved.
Keeping a Gambling Diary Is Highly Worthwhile
If you’ve ever thought, “I’ll remember roughly what I won this year,” tax season is probably going to test that confidence.
The IRS expects taxpayers claiming gambling losses to maintain records supporting their wins and losses. An accurate gambling diary or similar record should sit alongside supporting documentation such as receipts, wagering tickets, casino statements and payment records.
A sensible record might include the date, type of gambling activity, where you played and how much you won or lost. For online gambling, account histories and transaction statements can be particularly useful.
Don’t wait until April and attempt to reconstruct twelve months of gambling from your bank account and a vague memory of having a good night in Vegas sometime around July.
Watch Out for Withholding
Sometimes tax may already have been taken from gambling winnings before you receive them. Current IRS W-2G guidance provides for 24% federal withholding on certain qualifying gambling winnings, with the exact requirements depending on the type and size of the wager.
Backup withholding can also apply in certain circumstances, including where a correct taxpayer identification number hasn’t been provided. If federal tax has already been withheld, it should appear in Box 4 of your W-2G and be accounted for when preparing your return.
Don’t confuse withholding with your final tax bill, though. The amount withheld isn’t necessarily the exact amount you’ll ultimately owe.
The Mistakes Worth Avoiding
Most gambling tax problems don’t begin with somebody deliberately attempting an elaborate tax dodge. In fact, the ones most overlooked tend to be the ordinary ones.
A player assumes small wins don’t count because no W-2G arrived. Someone reports only their net result instead of properly reporting winnings and separately claiming eligible losses. Another person tries to claim losses but has virtually no records to prove them.
The IRS already receives copies of reportable W-2G information, so leaving one off your return can also create an obvious mismatch.
It’s also worth remembering that if you win with other people, don’t automatically treat the entire amount as yours for tax reporting purposes. This is because form 5754 exists for situations where gambling winnings are shared among multiple winners, allowing the payer to prepare the appropriate W-2Gs.
State Taxes Also Count
Federal taxes are only part of the picture. States can have their own rules governing gambling income, deductions and withholding, and those rules don’t necessarily mirror federal treatment. Where you live and where you gambled can therefore affect what additional filing obligations you have.
That’s also why a national guide like this can only take you so far. If you’ve won a substantial amount, gamble frequently, play professionally or have winnings across multiple states, talking to a qualified tax professional can be money well spent.
Keep the IRS Out of the Casino Afterparty
Winning money at a casino should be the enjoyable part. Keeping track of it isn’t nearly as exciting, but a little organization throughout the year makes filing considerably easier.
Record your wins and losses separately, save your W-2Gs and supporting documents, check whether federal tax has already been withheld and don’t assume that missing paperwork means missing tax.
Most importantly, remember that the rules can change. The new 2026 restriction on gambling-loss deductions is a perfect example. Enjoy the win, take the photo and celebrate if you want—just be sure to save the paperwork too!
