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What the IRS Gambling Loss Deduction Rules Mean for Bettors: A Comprehensive Guide

By jili tutorial · September 18, 2026

What the IRS Gambling Loss Deduction Rules Mean for Bettors: A Comprehensive Guide

Introduction: Understanding the Shift in Gambling Tax Law

For years, taxpayers who itemize their federal returns have been able to deduct gambling losses—but only up to the amount of their winnings. Recent legislative developments, however, have introduced significant changes that could reshape how bettors, casinos, and the broader gaming industry approach tax season. This guide unpacks the latest rules, their origins, and what they mean for casual gamblers and high-volume players alike.

The Core Rule: 100% Deduction for Gambling Losses

What the Law Currently Says

Under the Digital Asset Tax Certainty Act (H.R. 10357), passed by the House Ways and Means Committee on September 16 with a bipartisan 38-5 vote, the federal tax code is poised to restore the gambling loss deduction to 100% against winnings for the 2026 tax year. This marks a reversal from the 90% cap imposed by the One Big Beautiful Bill Act (OBBBA), a Republican-led tax overhaul signed into law by President Donald Trump.

How the Deduction Works for Itemizers

Only taxpayers who itemize deductions on their federal returns can claim gambling losses. Here’s the key principle:

Example: Before and After the OBBBA Cap

ScenarioUnder 100% DeductionUnder 90% Cap (OBBBA)
Winnings: $100,000Losses deduct: $100,000Losses deduct: $90,000
Losses: $100,000Taxable income: $0Taxable income: $10,000
Tax due (at 24% bracket)$0$2,400

Under the 90% cap, the gambler would owe taxes on $10,000 in phantom income—money never actually earned—because the system treated $10,000 of real losses as nonexistent.

Why the Deduction Was Reduced in the First Place

The OBBBA and Its Rationale

The One Big Beautiful Bill Act (OBBBA) was a sweeping tax reform package that, among other things, aimed to increase federal revenue. The gambling loss deduction was trimmed from 100% to 90% as part of broader deficit-reduction measures. The Congressional Budget Office estimated this change would generate $1.1 billion in additional federal tax revenue over eight years.

Industry Backlash and the Fight for Restoration

Nevada’s congressional delegation—along with representatives from other major gaming states like Pennsylvania—led the charge to restore the full deduction. They argued that the 90% cap would have “devastating consequences” for the legal gaming market. Representative Steven Horsford (D-NV) , whose FULL House Act was the provision embedded in the Digital Asset Tax Certainty Act, put it bluntly:

“For Nevada, this is about protecting our economy and the workers and small businesses who depend on tourism and gaming. Their livelihoods are at stake.”

Key concerns included:

IRS Data: Who Actually Uses the Gambling Loss Deduction?

A Small but Significant Group

According to IRS data for the 2023 tax year (the most recent year with publicly available statistics):

The Dollar Amounts Involved

Despite the small number of claimants, the financial stakes are enormous:

Who Benefits Most?

The data reveals that this deduction is primarily used by high-volume bettors—professional poker players, sports bettors, horse racing enthusiasts, and casino high-rollers—who produce substantial winnings and losses in a single year. Casual gamblers who win occasionally and lose small amounts rarely itemize, making the deduction irrelevant for most people.

Recordkeeping Requirements: What the IRS Demands

Prove It, or Lose It

The IRS requires that gamblers who itemize deductions keep meticulous records of both winnings and losses. According to the tax code, you must be able to “prove those amounts with receipts, tickets, statements, or similar items” in the event of an audit.

What to Keep

What Not to Keep

Audit Risk

While the gambling deduction is used by a tiny fraction of filers, the IRS pays close attention to it. If you claim a large deduction relative to your income, expect extra scrutiny. Professional gamblers often need to show they are operating a trade or business (not just a hobby) to deduct expenses beyond losses, which requires even more documentation.

Broader Implications for the Gaming Economy

Protecting the Regulated Market

The restoration of the 100% deduction is seen as a victory for the legal gaming industry. Casinos, sportsbooks, and online betting platforms argue that punitive tax rules drive customers to offshore operators who ignore U.S. tax laws. Offshore sites:

By keeping the deduction intact, lawmakers hope to preserve the $50+ billion regulated gaming market, which supports hundreds of thousands of jobs and generates significant state and local tax revenue.

State-by-State Impact

States with large gaming sectors—Nevada, New Jersey, Pennsylvania, Michigan, and West Virginia—stand to lose most if gamblers flee to the black market. For example:

Practical Advice for Bettors

Step 1: Know Your Filing Status

Step 2: Track Everything in Real Time

Use an app or a simple spreadsheet to log:

Step 3: Understand the “Winnings First” Rule

Losses cannot exceed winnings. If you won $5,000 but lost $6,000, you can deduct only $5,000. The extra $1,000 loss carries over? No. It is lost forever—gambling losses cannot be carried forward to future years.

Step 4: Seek Professional Help If Needed

High-volume bettors, especially those claiming professional status, should consult a tax professional who understands gaming law. Mistakenly classifying a hobby as a business can trigger an audit and penalties.

Looking Ahead: What the Future Holds

While the Digital Asset Tax Certainty Act has cleared the House Ways and Means Committee, it still faces the full House and Senate. However, the bipartisan support and industry lobbying suggest a strong chance of passage. If enacted, the 100% deduction will apply to tax year 2026, meaning the 90% cap remains in effect for 2024 and 2025 returns.

For now, bettors should:

Conclusion

The IRS gambling loss deduction—though used by less than 0.4% of taxpayers—is a critical policy lever for the legal gaming industry. The battle between a 100% and 90% deduction may seem like a small technicality, but it has outsized consequences for high-volume bettors, casino revenues, and state economies. With the Digital Asset Tax Certainty Act moving forward, the future looks brighter for those who gamble legally and report honestly.