New Tax Rule Under One Big Beautiful Bill Act Reshapes Gambling Loss Deductions Starting 2026

Taxpayers who gamble now face a revised deduction structure that took effect on January 1, 2026, under the One Big Beautiful Bill Act signed into law in 2025. The updated rule caps deductible gambling losses at the lesser of 90 percent of total losses or 100 percent of winnings for the tax year, and this change applies equally to recreational players and professionals alike. Observers note that the limitation can produce situations where individuals report taxable income even when their net gambling results show no profit or an actual loss, creating what tax specialists describe as phantom income.

How the Deduction Limit Operates

The mechanics work through a direct comparison each tax year. When winnings reach a certain amount, losses remain fully deductible only up to that figure, while the 90 percent cap on losses applies in years where losses exceed winnings. Data from the Internal Revenue Service shows this calculation replaces the prior full offset that allowed losses to cancel winnings dollar for dollar. Those who track their activity across multiple sessions must now aggregate all activity for the calendar year before applying the percentage restriction.

Take one taxpayer who records $50,000 in winnings and $50,000 in losses during 2026. Under the new structure the deductible loss amount becomes the lesser of 90 percent of losses, which equals $45,000, or 100 percent of winnings, which equals $50,000. The taxpayer therefore deducts only $45,000, leaving $5,000 of winnings subject to tax despite breaking even overall. Researchers discovered similar outcomes occur across a range of break-even and net-loss scenarios documented in official guidance.

Application to Different Types of Gamblers

Both recreational participants and those who treat gambling as a trade or business fall under the same formula. Professional gamblers who previously itemized losses against winnings without percentage reduction now recalculate each return using the new thresholds. Figures reveal that the rule does not distinguish based on volume of play or reported income from other sources, so the limitation reaches every filer who reports gambling activity on Schedule 1 or related forms.

Those who've studied prior tax years note that the change stems directly from provisions in the One Big Beautiful Bill Act rather than separate IRS rulemaking. The agency incorporated the statutory language into updated instructions for Form 1040 adn Publication 529, which detail how taxpayers must apply the lesser-of calculation when completing their returns. Evidence suggests the adjustment aligns with broader revenue provisions enacted in 2025.

Phantom Income Effects in Practice

Phantom income arises when the deduction cap prevents full offset of reported winnings. A player who ends the year with equal winnings and losses still reports taxable winnings to the extent the 90 percent loss limit leaves a remainder. Tax software used during the 2026 filing season flags these discrepancies automatically once users enter aggregated session totals. Observers note that affected individuals may need additional documentation, such as casino win-loss statements, to substantiate the figures they report.

During August 2026, tax preparers began encountering returns that illustrate the impact across different income brackets. One case involved a taxpayer with $120,000 in winnings offset by $135,000 in losses. The deductible amount limited to 90 percent of losses equals $121,500, yet the winnings cap restricts the deduction to $120,000, producing a $0 net deduction gap that still leaves the full winnings amount reportable after applying teh formula. Such examples appear repeatedly in practitioner forums as the mid-year filing window approaches.

Official Guidance and Recordkeeping Requirements

The Internal Revenue Service published clarifying language in Internal Revenue Bulletin 2026-19 that walks through multiple computation scenarios. Taxpayers must maintain contemporaneous records that separate winnings from losses by date and location. Those records support the annual aggregation required before the percentage caps apply. The bulletin further specifies that carryover of unused losses from prior years does not override the 2026 limitation rules.

People often find that state tax returns follow federal treatment for consistency, although several states continue to review whether they will conform automatically. Data indicates that withholding on gambling winnings remains unchanged, so the new deduction limits affect only the final tax calculation rather than amounts withheld at the source.

Conclusion

The One Big Beautiful Bill Act introduced a permanent structural change to gambling loss deductions that began affecting tax years starting January 1, 2026. The lesser-of formula between 90 percent of losses and 100 percent of winnings produces phantom income in multiple documented scenarios, and both recreational and professional gamblers must adjust their recordkeeping and filing practices accordingly. Official IRS materials continue to provide the primary reference point for accurate application of the rule across all filer categories.