Gambling Loss Deduction Limit Tightens Under New Federal Tax Law

Imagine you’ve gone to Vegas for a weekend. You’ve made a sizeable poker win that was quickly offset by an equally big slot machine loss. In previous years, this would have meant no taxable income. But under new tax law, breaking even on paper could still mean paying the IRS.

The One Big Beautiful Bill Act, signed July 4, 2025, introduced a limit on how much gambling loss you can deduct. Now, individuals may only deduct up to 90% of their gambling winnings. The remaining 10% is taxed, even if total losses equal or exceed winnings.

This change directly affects how gamblers and advisors approach documentation and planning. It also impacts the way businesses like casinos and sportsbooks report payouts and losses. Whether the goal is tax compliance or improved financial outcomes, this rule should not be overlooked.

Gambling by the Numbers and What Qualifies as a Loss

Gambling income includes winnings from casinos, horse races, lotteries, raffles, sports betting, and even game shows. All gambling winnings are taxable and must be reported. When winnings exceed certain thresholds, a Form W-2G is issued, though all gambling income must be reported whether or not you receive the form.

Until mid-2025, taxpayers who itemized could deduct gambling losses up to the amount of their winnings. This allowed many to report zero net income if their losses matched or exceeded their gains.

That’s no longer the case. Under the updated law, only 90% of documented losses are deductible. If you win $10,000 and lose $10,000, you will still owe taxes on $1,000. This applies whether you gamble casually or frequently, and it introduces a new layer of complexity for taxpayers and preparers alike.

The IRS outlines these rules in Topic No. 419, which remains the definitive guidance on gambling income and losses. (Note: For professional gamblers, additional rules apply.) Reporting is done on Schedule C (i.e., Income from a trade or business), and the IRS expects consistent activity, strong documentation and evidence that gambling is conducted as a trade or business.

Accurate records are no longer just good practice. They’re essential under the new law to support any deduction and ensure proper reporting, especially as compliance scrutiny increases.

What the OBBBA Says About Gambling Loss Deductions

The gambling loss deduction limit appears in Section 4306 of the One Big Beautiful Bill Act, which amended prior IRS code allowing full deductions for gambling losses. The law applies across the board, whether the activity involves lotteries, casino games, sports betting or racetrack wagers. Lawmakers stated the rule is designed to improve tax fairness by ensuring that high-volume gamblers with frequent offsetting losses still report a minimum taxable gain.

From a policy standpoint, the change also aims to close deduction loopholes and prevent scenarios where winnings and losses are manipulated to create zero liability. But for honest filers, the change introduces a fixed minimum taxable amount, even in break-even or loss-heavy years.

Those who itemize deductions on Schedule A should review their strategy with a tax professional to determine how the 90% limit interacts with the new standard deduction thresholds (also adjusted under the law) and the haircut on itemized deductions.

Real-World Examples: What the 90% Rule Looks Like in Practice

Consider a casual bettor who wins $20,000 over a year and loses $20,000 in separate events. Before the rule change, they could deduct all $20,000 in losses, wiping out the tax burden. Under the new rule, they can only deduct $18,000, leaving $2,000 subject to federal income tax.

A professional poker player who wins $100,000 and loses $95,000 (including any related business expenses) would previously have reported $5,000 in net taxable income. Now, they can only deduct $90,000 (90% of winnings), so $10,000 becomes taxable income.

These changes impact more than gamblers. They also affect the businesses that issue W-2G forms and those that help track gambling activity for high-volume players. Whether you’re working with a casino’s player loyalty program or a sportsbook platform, documentation is key.

To remain audit-ready, individuals and professionals alike should retain win/loss statements, wagering logs, and receipts. With this rule in place, the IRS will expect a higher standard of evidence for any deductions claimed.

How Gambling Businesses Are Impacted

Gaming venues, online sportsbooks and racetracks play a central role in documenting and reporting gambling income. While the new law doesn’t directly change how these entities issue W-2Gs or report earnings, it does raise the stakes in how they help players manage records.

Patrons are more likely to ask for detailed win/loss statements or request tax guidance from venue staff. While venues cannot provide tax advice, they should be prepared to deliver accurate records and refer players to qualified advisors.

At the same time, businesses that cater to high-volume gamblers (like financial advisors or accounting firms) may see an increase in demand for planning strategies that account for this new limitation.

State Rules May Create Further Confusion

Taxpayers should also review how their state handles gambling income and losses. Some states conform to federal rules. Others don’t allow gambling loss deductions at all, regardless of federal treatment.

In states that do conform, the 90% cap will likely be adopted unless the legislature makes an exception. But states like Massachusetts and New York have their own limits, which can complicate multi-state tax reporting.

For those who travel to gamble or play across state lines through online platforms, it’s essential to consult with a professional familiar with both federal and state-level tax obligations. Tools like the Tax Foundation’s state comparison charts can help identify where treatment diverges.

Planning Ahead for the Gambling Loss Deduction Limit

The gambling loss deduction limit may appear straightforward, but it has far-reaching tax consequences. For individuals, the rule could result in new taxable income where none existed before. For businesses, the change introduces more complexity into reporting and recordkeeping.

Understanding the updated law and how it affects your situation requires proactive tax planning and documentation strategies to avoid costly mistakes or missed deductions. If gambling income is part of your financial picture, or if your business is entertainment, hospitality or gaming, now is the time to adjust your approach.

Contact a James Moore professional to review your current tax strategy, calculate potential exposure under the 90% rule, and prepare for a more efficient filing season.

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