New Rules Cap Gambling Loss Deductions at 90 Percent Starting in 2026

The One Big Beautiful Bill Act took effect on January 1, 2026 after its signing on July 4, 2025, and it introduced a 90 percent cap on deductions for gambling losses while also requiring that those deductions never exceed reported winnings, which means many taxpayers now face potential taxable income from gambling activities even in years when total losses match or surpass total winnings.

Recreational gamblers who itemize deductions on Schedule A and professional gamblers who report activity on Schedule C both operate under the revised framework, and the change applies uniformly across all forms of gambling reported to the IRS.

Mechanics of the Revised Deduction Limits

Under prior rules, taxpayers could deduct gambling losses up to the full amount of winnings reported on Form W-2G or similar documentation, yet the new legislation reduces that ceiling to 90 percent of actual losses sustained during the tax year. Observers note that this adjustment creates a situation in which a gambler who wins $10,000 and loses $10,000 can deduct only $9,000, leaving $1,000 treated as taxable income despite breaking even overall.

The cap operates alongside the longstanding requirement that deductions cannot exceed winnings, so the lower of the two figures always applies. Data from tax preparation services indicate that both casual players and those who treat gambling as a business must recalculate their expected refunds or liabilities under the updated formula when they prepare 2026 returns in early 2027.

Application to Recreational and Professional Gamblers

Recreational gamblers continue to report winnings as other income on Form 1040 and claim the limited loss deduction on Schedule A, whereas professional gamblers include both winnings and the capped losses directly on Schedule C as business income and expenses. Accountants who specialize in gaming taxation report that professionals now face an additional layer of record-keeping because they must substantiate the 90 percent figure with detailed session logs, bank statements, and receipts that demonstrate actual losses incurred.

Those who have studied the transition point out that the distinction between the two categories remains important for self-employment tax purposes, since Schedule C filers may still owe Social Security and Medicare taxes on net winnings after the capped deduction is applied.

Preparation and Record-Keeping Requirements

Taxpayers must maintain contemporaneous records that separate wins and losses by date, game type, and location, because the IRS continues to require proof that claimed deductions correspond to actual activity. The Internal Revenue Bulletin 2026-19 clarifies acceptable documentation standards and provides examples of how the 90 percent limitation interacts with carryover rules from prior years, although no carryover of the disallowed 10 percent portion is permitted under the new statute.

By August 2026, software providers had already updated their platforms to flag potential under-withholding for clients who report frequent gambling activity, and many tax professionals began offering specialized workshops focused on the revised calculation method. Figures released by industry groups show that an increasing number of filers requested extensions in 2026 partly because they needed additional time to compile the granular loss data now required.

Broader Effects on Tax Filing Patterns

Early filings for tax year 2026 reveal that some taxpayers who previously itemized solely to claim gambling losses have switched to the standard deduction once they realized the reduced benefit, while others who had relied on full loss offsets now owe small balances. Professional gamblers who operate as sole proprietors have adjusted their quarterly estimated payments upward to account for the portion of winnings that can no longer be offset.

State tax authorities in jurisdictions that conform to federal itemized deduction rules are evaluating whether to adopt parallel limitations, and several revenue departments have issued guidance mirroring the federal 90 percent cap for state returns. Those who prepare multi-state returns note that the federal change creates additional complexity when reconciling differences between federal and state treatment.

Conclusion

The One Big Beautiful Bill Act therefore establishes a permanent structural change to how gambling losses are treated for federal income tax purposes beginning in 2026, and both recreational participants and professionals must adapt their record-keeping and filing strategies accordingly. The 90 percent cap combined with the existing winnings limitation means that net-zero or net-loss years can still generate taxable income, which alters cash-flow expectations for many taxpayers engaged in gambling activities. As the first full tax year under the new rules concludes, updated IRS publications and practitioner resources continue to provide the primary reference points for accurate compliance.