A gambler who wins $10,000 over a year and loses $10,000 has, on paper, gone nowhere. Starting with tax year 2026, that person can still owe tax. For gamblers who itemize, the deduction for losses is now capped at 90 percent of the losses, while every dollar of winnings stays in income. Breaking even can therefore leave $1,000 of taxable income.
The 90 percent rule in Publication 505
The IRS spells out the new limit in Publication 505 for 2026: a gambling loss deduction on Schedule A (Form 1040) “will be limited to the lesser of (1) 90% of your gambling losses or (2) your gambling winnings.” Two caps now apply at once. Losses could always be deducted only up to the amount of winnings. The 90 percent haircut is new, and the smaller of the two figures is the deduction. Intuit’s rundown of the 2026 law changes, dated August 8, 2026, describes the same limit as part of the One Big Beautiful Bill Act.
Only itemizers ever reach this rule. The deduction for gambling losses sits on Schedule A, so a taxpayer who takes the standard deduction cannot deduct losses at all, before or after the change. Publication 505 lists the 2026 standard deduction at $16,100 for single filers, $32,200 for married couples filing jointly and $24,150 for heads of household.
Break-even arithmetic in three cases
The examples below are illustrations built on the rule, not IRS examples, and they ignore every other item on the return.
Even year. Winnings are $10,000 and losses are $10,000. Ninety percent of losses is $9,000, which is lower than the $10,000 of winnings, so the deduction is $9,000. The winnings are all reported as income, so taxable gambling income is $10,000 minus $9,000, or $1,000. At a hypothetical 22 percent tax rate, that is $220 of tax on a year in which the gambler ended with exactly what was wagered.
Small net win. Winnings are $10,000 and losses are $9,000. The gambler is $1,000 ahead. Ninety percent of $9,000 is $8,100, so taxable gambling income is $10,000 minus $8,100, or $1,900. That is $900 more than the actual profit.
Net loss. Winnings are $10,000 and losses are $12,000. Ninety percent of $12,000 is $10,800, but the deduction cannot exceed winnings, so it is $10,000. Taxable gambling income is zero. Here the winnings cap does the work, and the gambler is $2,000 behind without owing tax on the winnings.
The pattern across the three cases is that taxable income exceeds the true net result by 10 percent of the losses whenever losses are at or below winnings, which is why the even year leaves 10 percent of $10,000 taxable. The haircut stops mattering once losses reach about 111 percent of winnings, because at that point 90 percent of the losses equals the winnings ($10,000 divided by 0.9 is about $11,111), and the winnings cap takes over. A gambler in that position pays no tax on the gambling, but is not made whole either.
Why the IRS topic page still shows the old rule
Not every IRS page has caught up. Tax Topic 419 on gambling income and losses, last updated September 24, 2026, still says that “the amount of losses you deduct can’t be more than the amount of gambling income you reported.” That sentence describes the winnings cap only, and it does not mention the 90 percent limit. Publication 505 is the page that carries the new wording, and a reader who lands on the topic page first could come away with the pre-2026 rule.
What the W-2G threshold does and does not change
A separate gambling item in the 2026 paperwork should not be confused with this deduction. The IRS instructions for Form W-2G, the form used to report certain gambling winnings, say: “The minimum threshold amount for payments made in calendar year 2026 is $2,000.” The instructions apply that figure to certain payments and add a new section on reporting winnings from sports wagering. The W-2G instructions as read for this article do not tie the threshold to slot machines, so no claim is made here about slot machine reporting.
The W-2G is a reporting form. The 90 percent limit is a rule about the deduction, which is calculated on the tax return regardless of which winnings triggered a form.
Records the deduction depends on
Because the deduction is the lesser of two numbers, both totals matter for the year: the sum of winnings and the sum of losses. A gambler who itemizes has to know both to compute the cap. Without a record of losses, the deduction cannot be figured at all, and without a record of winnings the “lesser of” test cannot be run.
The clearest statement of the rule remains the IRS’s own. Publication 505 says a gambler’s Schedule A deduction is limited to the lesser of 90 percent of gambling losses or gambling winnings, beginning in 2026, and Tax Topic 419 shows the winnings-only wording that predates it.
Keeping IRS letters straight after filing
The IRS Refund Recovery Kit is written for filers who receive an IRS notice after a return is filed and need to sort out what it means for a refund. It is a reference for reading letters and keeping the dates straight.
The IRS Refund Recovery Kit pairs a notice decoder with a refund status tracker spreadsheet, so each letter and each refund date can be recorded in one place.
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This article was written with AI assistance, and the rule and figures were checked against the IRS pages cited.
