The payout screen says $400,000 and your phone is full of congratulations. But that number is the prize, not your profit. Before you know whether you made money this year, or what you owe, three numbers have to be pulled apart: the headline cash, what you actually kept, and what the IRS will tax.
They are rarely the same. Here is how to get from one to the next.
What the W-2G shows
For a poker tournament, the sponsor files Form W-2G when your winnings, reduced by the buy-in, meet the reporting threshold, and box 1 shows those net winnings (IRS Instructions for Forms W-2G and 5754 (01/2026)). A $400,000 cash in a $10,000 event generally produces a W-2G for $390,000.
Two things about that form surprise players:
- No regular withholding. Regular gambling withholding does not apply to poker tournament winnings reported on a W-2G. Backup withholding at 24% applies if you do not give the payer your taxpayer identification number (same source). In most cases, nothing has been paid toward the tax yet.
- It is in your name. The form follows the payout, not ownership. If you sold action or swapped, the whole $390,000 may still be reported under your name, unless the payer used Form 5754 to prepare a separate W-2G for each person sharing the winnings (same source).
The W-2G is where the reconciliation starts. It is not your result.
What shrinks “your” share
Buy-ins for the rest of the year. The form nets only that one event’s buy-in. Every tournament you entered without cashing, and every re-entry, still came out of someone’s pocket. One big score and forty bricks is a different year than the headline suggests.
Staking. If a backer owns part of your action, part of the prize is theirs. So are the buy-ins they paid: those are not your losses to deduct. How each side reports a staked win depends on the agreement and how the payout was handled, which we cover in Poker Staking and Taxes: Who Reports What?.
Makeup. In many staking deals, the backer recovers everything the package is down before any profit is split. If you were $60,000 in makeup when you binked, the first $60,000 goes to clearing it, and you share only what is left.
Swaps. Trading 5% with a friend means 5% of your cash is theirs. If they cash, part of their prize is yours, and that belongs in your records too. Swaps are rarely written down, which is exactly why they go missing by April.
Travel and other costs. Flights, hotels, meals on the road, and training tools are real costs of producing the result. Whether they reduce your taxable figure depends on your status.
A worked example
Hypothetical example only. Figures are round and simplified, and they leave out the rest of the return.
A professional tournament player is staked for a summer series. The backer pays every buy-in, and the two split profit 50/50 after makeup. Before the big score, the package is down $60,000 with no cashes. Then the player cashes for $400,000 in a $10,000 event, after swapping 5% with a friend who did not cash.
Step 1: The score
- Prize: $400,000
- W-2G box 1 (prize less the $10,000 buy-in): $390,000
Step 2: Who owns the prize
- Swap paid to the friend (5% of $400,000): $20,000
- Left for the staking package: $380,000
- Backer recovers makeup plus this buy-in ($60,000 + $10,000): $70,000
- Package profit ($380,000 less $70,000): $310,000
- Player’s half: $155,000
- Backer’s total ($70,000 + $155,000): $225,000
Check: $20,000 + $225,000 + $155,000 = $400,000. The player’s piece of the headline is $155,000.
Step 3: The rest of the year, self-funded
- Buy-ins for events that did not cash: $90,000
- Profit on smaller cashes, after their own buy-ins: $50,000
- Net on these events: a $40,000 loss
- Travel, lodging, and other playing costs: $25,000
The real result: the $155,000 share, less the $40,000 net loss on other events, less $25,000 of costs, is $90,000.
The taxable result (professional, 2026 federal):
- Wagering gains ($155,000 + $50,000): $205,000
- Losses and expenses ($90,000 + $25,000): $115,000
- Allowed at 90% of $115,000: $103,500 (within the $205,000 of gains)
- Net gambling income ($205,000 less $103,500): $101,500
A $400,000 headline. A $90,000 year. And $101,500 of taxable gambling income, which is $11,500 more than the player actually made. Before 2026, the taxable figure would have matched the $90,000.
This example assumes the backer’s and the friend’s shares are documented and reported as theirs, and that the player’s share is reported as gambling income. Those are real assumptions, not formalities. Without the paperwork, the IRS starting point is a $390,000 W-2G in the player’s name.
Why the taxable number can be higher than the real one
For taxable years beginning after December 31, 2025, IRC §165(d) allows a deduction for only 90% of wagering losses, and only up to wagering gains for the year (Public Law 119-21, §70114). For this purpose, “losses from wagering transactions” includes any other deduction incurred in carrying on a wagering transaction, so a professional’s travel and other costs sit inside the same 90% cap (IRC §165(d)(2)).
The 10% that does not count gets taxed even though you never kept it. That is how a break-even year, or a modestly losing one, can still leave tax owed. We walk through the rule in The 2026 Gambling Loss Limit: Planning for the 90% Rule.
Bills to restore the full deduction have been introduced, and one advanced through the House Ways and Means Committee in September 2026. As of this writing, none has been enacted.
California generally does not conform to the 2025 federal tax law (FTB, 2025 Instructions for Schedule CA (540)), so a California resident’s state figure may differ. If the score came in another state, see You Live in California but Won in Nevada. Who Taxes It?.
Professional or recreational changes the math
The example assumes the player is a professional reporting on Schedule C. That is not a choice. It follows how you play (Commissioner v. Groetzinger, 480 U.S. 23 (1987)), and we cover the test in Professional or Recreational Gambler? How the IRS Decides. The same year lands very differently:
- Professional. Winnings, losses, and expenses go on Schedule C, with the 90% cap applied to losses and expenses together. Schedule C profit also generally carries self-employment tax (IRC §1402(a)).
- Recreational. All $205,000 of winnings is reported as income, which raises adjusted gross income. Losses count only as an itemized deduction on Schedule A, and only if you itemize (IRS Topic No. 419). Here that is 90% of $90,000, or $81,000. The $25,000 of travel generally does not count at all, because it is a personal expense (IRC §262).
In the recreational version, the gambling lines alone net to $124,000 of income on a $90,000 year, and claiming the losses means giving up the standard deduction. Neither status is automatically better. It depends on the whole return.
What to do after a big score
- Run all three numbers. Headline, your share, and taxable result.
- Paper every split. Written staking terms, makeup balances, swap agreements, and settlement records are what turn a $390,000 W-2G into your actual share. Our recordkeeping page covers what a log should hold.
- Ask the payer about Form 5754 when you sold action or swapped, so the forms follow who owns the money.
- Plan for the year, not the score. With nothing withheld and the 90% cap in play, sizing estimated payments to the year’s taxable figure may help limit underpayment penalties (IRC §6654).
How TreeStar can help
The TreeStar team can help you turn a big cash into three clear numbers: the prize, your real result, and your taxable result. We offer tax planning that models the 90% limit on your actual year, tax preparation that ties your return to every W-2G, and ongoing bookkeeping that keeps buy-ins, staking settlements, swaps, and travel recorded as the year unfolds. If a notice about a W-2G arrives, we provide IRS representation.
This article is general information, not advice for your situation. Rules change; confirm current law before acting.
