The One Big Beautiful Bill Act Introduces New Limits on Gambling Loss Deductions Beginning in 2026

The One Big Beautiful Bill Act, signed into law on July 4, 2025, establishes fresh parameters for how gamblers calculate deductible losses on their federal returns, and those parameters take effect for tax years starting January 1, 2026. Under the prior framework, taxpayers could subtract the full amount of their gambling losses up to the total of their winnings, yet the new statute caps the allowable deduction at 90 percent of losses while still respecting the winnings ceiling. Observers note that this adjustment applies across both recreational and professional gambling activities, although the reporting pathways and expense treatments diverge sharply between the two groups.

Previous Deduction Framework and the Shift in 2026

Before the legislation took shape, Schedule A filers who itemized could claim gambling losses dollar for dollar against reported winnings, and professional gamblers operating on Schedule C enjoyed similar latitude when netting losses against winnings plus ordinary business expenses. The One Big Beautiful Bill Act modifies that approach by inserting the 90 percent limitation on losses, and the cap remains tethered to the amount of winnings declared in the same tax year. Data from tax preparation resources indicate that many filers will encounter situations where losses equal or surpass winnings yet taxable income still arises because only 90 percent of those losses become deductible. According to the Internal Revenue Bulletin 2026-19, the change stems from adjustments embedded in the broader tax provisions enacted mid-2025.

Impact on Recreational Gamblers Using Schedule A

Recreational gamblers continue to report winnings as other income and claim losses only through itemized deductions on Schedule A, yet the 90 percent restriction now governs how much of those losses can offset the winnings figure. When a recreational player records $20,000 in winnings alongside $22,000 in documented losses, the allowable deduction drops to $19,800, leaving $200 of the winnings exposed to taxation even though net results sit below zero. People who track their casino visits and lottery purchases often discover that maintaining detailed records becomes even more critical under the revised percentage limit, since any shortfall in substantiation can further reduce the available offset. The legislation does not alter the requirement that losses must be substantiated with receipts, tickets, or other contemporaneous documentation.

Application to Professional Gamblers Filing on Schedule C

Professional gamblers who treat gambling as a trade or business report both winnings and allowable expenses on Schedule C, and the new statute layers the 90 percent loss cap onto that schedule while preserving the ability to deduct ordinary and necessary business costs separately. A professional who incurs $50,000 in travel, training, and equipment expenses alongside $80,000 in losses and $75,000 in winnings must apply the 90 percent limit only to the loss component, resulting in a maximum $67,500 loss deduction that then combines with the expense total. Tax software updates released in early 2026 reflect these bifurcated calculations, and practitioners note that the interaction between the percentage cap and the expense deduction can produce taxable income even when overall cash flows remain negative. The distinction between recreational and professional status therefore carries heightened weight once the January 1, 2026 effective date arrives.

Taxable Income Scenarios and Record-Keeping Requirements

One common outcome under the revised rules occurs when total losses meet or exceed total winnings yet the 90 percent ceiling prevents full offset, thereby creating taxable gambling income on the return. Taxpayers who previously relied on complete loss offsets may need to adjust estimated payment calculations throughout 2026 to avoid underpayment penalties once the new limitation applies. The Internal Revenue Service continues to require that all gambling activities, whether recreational or professional, maintain logs that include date, location, type of wager, amount won or lost, and the names of any witnesses present. Failure to produce such records can lead to complete disallowance of the remaining 10 percent slice as well as the expenses claimed on Schedule C. By August 2026, many filers will have completed at least one full quarter under the updated statute, providing initial data points on how frequently the 90 percent cap generates unexpected tax liabilities.

Preparation Steps for the 2026 Filing Season

Accountants and enrolled agents recommend that clients separate recreational and professional activities into distinct tracking systems well before year-end, because commingling records can complicate the application of the percentage limitation. Software providers have incorporated diagnostic checks that flag instances where reported losses exceed the 90 percent threshold relative to winnings, prompting users to verify documentation. Those who have studied the transition from prior law to the One Big Beautiful Bill Act understand that the change does not eliminate the overall winnings cap but simply reduces the loss percentage that may be applied beneath it. Educational webinars hosted by tax professional organizations throughout spring 2026 focus on these mechanical differences rather than broader policy debates.

Conclusion

The One Big Beautiful Bill Act therefore marks a measurable departure from the long-standing 100 percent loss offset regime, and its implementation beginning January 1, 2026, requires both recreational and professional gamblers to recalibrate how they document and report their activities. The 90 percent limitation, when combined with the existing winnings ceiling, can produce taxable income in previously neutral or negative net positions, prompting renewed attention to record accuracy and filing category selection. Taxpayers who anticipate significant gambling volume during the remainder of 2026 benefit from reviewing the updated instructions attached to Schedules A and C as well as any guidance released in Internal Revenue Bulletin 2026-19.