Gambling Loss Deduction Guide

What the Gambling Loss Deduction Is

Gambling winnings are fully taxable income. Gambling losses are deductible, but only within a tight frame set by IRC §165(d): you can deduct wagering losses only to the extent of your wagering gains for the year. There is no netting on the income side - every dollar of winnings goes into income, and the losses come back as a separate, capped deduction. The result is that you can never use gambling losses to shelter wages, business profit, or investment income, and you can never report an overall gambling loss on your return.

For a casual (recreational) gambler, the loss deduction is an itemized deduction on Schedule A, line 16, in the "Other Itemized Deductions" group. That makes it useless to anyone who takes the standard deduction. A professional gambler - someone who gambles as a trade or business - instead reports on Schedule C, where losses and connected expenses offset winnings without itemizing, though still subject to the same overall limit.

The One Big Change for 2026

For decades, §165(d) allowed a full deduction of losses up to winnings, so a gambler who broke even owed no tax on the activity. The One Big Beautiful Bill Act changed that. Beginning in 2026, only 90 percent of losses are deductible (see the 90 percent section), which means even a break-even gambler now reports taxable income. This guide covers both the 2025 rules (100 percent up to winnings) and the new 2026 rules side by side.

The New 90 Percent Limit (2026)

Section 70114 of the One Big Beautiful Bill Act (P.L. 119-21) amended IRC §165(d). For tax years beginning after December 31, 2025, the deduction for wagering losses is set at 90 percent of those losses, and it remains allowed only to the extent of gambling winnings. The statutory text now reads that the amount allowed as a deduction "shall be equal to 90 percent of the amount of such losses" and "shall be allowed only to the extent of the gains from such transactions."

In plain terms, the deduction is the lesser of two numbers: 90 percent of your losses, or your total winnings. The disallowed 10 percent is gone permanently. It does not carry forward to a future year, and there is no exception for size, frequency, or gambler type.

Why the Change Happened

The TCJA-era expansion of §165(d), which folded business expenses into the wagering-loss limit, was scheduled to expire at the end of 2025. To make the provision permanent and still satisfy the budget rules of the 2025 reconciliation bill, Congress lowered the deduction to 90 percent of losses, which raised revenue. The change took effect with very little public attention and applies broadly.

The Winnings Cap and Phantom Income

The winnings cap is the older and often more important of the two limits. Because losses can be deducted only to the extent of winnings, a year of net losses produces no deductible benefit beyond the winnings you reported. Lose $50,000 against $20,000 of winnings and you deduct at most $20,000 (or 90 percent of losses if that is lower in 2026); the remaining $30,000 of real economic loss is simply not deductible and never carries forward.

How Phantom Income Arises

Phantom income is taxable income with no matching cash in your pocket. It appears in gambling because winnings hit gross income in full while losses are squeezed by both the winnings cap and, from 2026, the 90 percent rule. The classic case is the break-even gambler: win $100,000, lose $100,000, and under the 2026 rule deduct only $90,000, leaving $10,000 of taxable income on an activity that netted zero cash.

The effect is worse for a casual gambler who does not itemize. If you take the standard deduction, your loss deduction is zero, so the entire $100,000 of winnings is taxable even though you ended the year flat. High reported winnings can also raise adjusted gross income enough to trigger other costs - a higher taxable share of Social Security, Medicare IRMAA surcharges, or phase-outs of other tax benefits.

Casual vs Professional Gamblers

How you report gambling depends on whether the IRS treats you as a casual gambler or as someone in the trade or business of gambling. The distinction changes where the numbers go and which expenses you can deduct.

Casual (Recreational) Gamblers

Most people are casual gamblers. They report all winnings as Other Income on Schedule 1, line 8b, and deduct losses (up to winnings, and 90 percent of losses from 2026) on Schedule A line 16 - only if they itemize. A casual gambler cannot deduct travel, meals, or other expenses of gambling; only the wagering losses themselves are deductible, and only against winnings.

Professional Gamblers

A professional gambler treats gambling as a trade or business and reports on Schedule C. Winnings are gross receipts; wagering losses and connected business expenses (travel, entry fees, subscriptions, a home office) are deductible. The catch is §165(d)(2): "losses from wagering transactions" includes any otherwise-allowable deduction incurred in carrying on the wagering activity, so those business expenses are folded into the wagering-loss limit. The result is that a professional can deduct losses plus expenses only up to winnings, and from 2026 only 90 percent of that total. A professional can never report a net Schedule C loss from gambling.

Net gambling income for a professional is self-employment income, subject to 15.3 percent self-employment tax in addition to income tax. Professional status is a facts-and-circumstances test from the Supreme Court's Groetzinger decision: it requires pursuing gambling full time, in good faith, with regularity, for a livelihood, not as a hobby. The IRS scrutinizes the claim, and misclassifying a serious recreational gambler as a professional invites an audit.

How the Deduction Is Calculated

The math follows the statute in two steps, applied after you total winnings and losses for the year (netted by session, not by bet).

• Step 1 - Apply the loss percentage. For 2026, multiply total losses (plus connected expenses for a professional) by 90 percent. For 2025, use 100 percent.
• Step 2 - Cap at winnings. The deduction equals the lesser of the Step 1 figure or total winnings. If losses far exceed winnings, the winnings cap binds first and the 90 percent rule may not change the answer.
• Step 3 - Check itemizing (casual only). A casual gambler can claim the Step 2 amount only by itemizing on Schedule A. If you take the standard deduction, the deductible amount is zero.

For example, with $100,000 of winnings and $100,000 of losses in 2026, Step 1 gives $90,000, Step 2 caps at $100,000 so the deduction stays $90,000, and a casual itemizer claims $90,000 - leaving $10,000 of taxable gambling income. With $200,000 of losses against the same $100,000 of winnings, Step 1 gives $180,000 but Step 2 caps the deduction at $100,000, so the 90 percent rule has no extra effect and there is no phantom income. The Gambling Loss Deduction Calculator runs both steps for either year.

Reporting: Form W-2G, Schedule 1, and Schedule A

Gambling reporting starts with the payer. A casino, track, or sportsbook issues Form W-2G when winnings reach a threshold, and may withhold tax, but you must report all winnings regardless of whether a W-2G was issued.

Form W-2G Thresholds

Regular gambling withholding and backup withholding are both 24 percent. Withholding is a prepayment, not a final tax; you still report the full winnings and reconcile the withholding on your return.

Where the Numbers Go

A casual gambler reports total winnings as Other Income on Schedule 1 (Form 1040), line 8b, and deducts losses (up to winnings, 90 percent from 2026) on Schedule A line 16 as an Other Itemized Deduction, only if itemizing. A professional reports winnings as gross receipts and losses and expenses on Schedule C, with the same overall cap. Do not net winnings and losses before reporting winnings; the IRS expects the gross winnings figure in income and the limited losses as a separate deduction.

Recordkeeping and Substantiation

The loss deduction lives or dies on records. The IRS requires a contemporaneous diary or similar log, supported by documents, and can deny an unsubstantiated loss deduction in full even if the losses were genuine.

• A diary showing the date and type of each wager, the name and address of the gambling establishment, the people you were with, and the amounts won and lost.
• Supporting documents such as Form W-2G, wagering tickets, canceled checks, credit card records, bank withdrawal slips, and casino or sportsbook win/loss statements.
• Session records. The IRS measures gambling on a per-session basis, not bet by bet. A slot player's session is a continuous period of play, so you net the wins and losses within that session before reporting. Reporting each winning spin as gross income while ignoring sessions inflates both winnings and the loss limit.

A casino win/loss statement is a useful starting point but is not by itself conclusive; the IRS treats it as an estimate that must be reconciled with your own diary. Keep the records for at least three years after filing.

State Tax Treatment

Federal rules are only half the story. Many states tax gambling winnings in full but disallow or sharply limit a deduction for losses, which can make the state result much harsher than the federal one.

States that tax winnings while generally disallowing or limiting a loss deduction include Connecticut, Illinois, Indiana, Massachusetts, Michigan, Ohio, West Virginia, and Wisconsin. In those states a break-even gambler can owe meaningful state income tax on gross winnings with no offset at all - a state-level version of phantom income that is often larger than the new federal 90 percent haircut. Some states that do allow a loss deduction tie it to itemizing on the state return, which may not be available if you take the federal standard deduction.

State conformity to the new federal 90 percent rule also varies: some states start from federal taxable income and inherit the change automatically, while others use their own definitions. Because the rules differ so widely, check your specific state before assuming any loss deduction. This guide and the calculator address the federal computation only.

What OBBBA Changed and the Possible Repeal

The One Big Beautiful Bill Act (P.L. 119-21) made two changes that matter for gamblers, both effective for tax years beginning after December 31, 2025.

• The 90 percent loss limit. §70114 amended IRC §165(d) so only 90 percent of wagering losses are deductible, still capped at winnings. This is the headline change and the source of the new phantom income.
• The expanded loss definition made permanent. The TCJA rule that folds business expenses into the wagering-loss limit under §165(d)(2) was set to expire after 2025; OBBBA made it permanent, so the 90 percent cap reaches a professional's expenses too.
• Higher W-2G thresholds. A related provision raised the slot, bingo, and keno reporting threshold from $1,200/$1,500 to $2,000 beginning in 2026, indexed for inflation afterward. This is a reporting change, not a tax change.

Could the 90 Percent Limit Be Repealed?

Possibly. The change drew immediate criticism from the gaming industry and tax professionals, and bipartisan bills have been introduced to restore the full 100 percent deduction before the 2026 returns are filed. As of now, none has been enacted, so the 90 percent rule is current law for tax years beginning in 2026. Plan around the rule as written, keep an eye on legislation, and use the calculator to compare the 2025 and 2026 outcomes so you can see exactly what a repeal would restore.

Practitioner Insight (LMN Tax Inc.)

Real-World Scenarios

When the General Rules Do Not Apply

• Self-employment tax. A professional gambler owes 15.3 percent self-employment tax on net gambling income, on top of income tax. The deduction rules do not change that liability.
• Session netting. Wins and losses are measured by session, not by individual bet. Reconstruct sessions from your diary and the casino statement before totaling winnings and losses.
• State disallowance. Several states tax winnings in full but disallow loss deductions, producing a state tax bill even in a break-even year.
• Nonresident aliens. A nonresident alien generally cannot deduct gambling losses (a narrow exception exists for Canadian residents), and U.S. winnings face 30 percent withholding.
• Non-cash prizes. Cars, trips, and merchandise are taxed at fair market value as winnings, even though no cash changed hands.
• The 35 percent benefit cap and AMT. For top-bracket itemizers, the OBBBA caps the value of itemized deductions at 35 cents per dollar, and the alternative minimum tax can further change the benefit.
• Possible repeal. The 90 percent limit could be reversed before the 2026 return is filed; compare both years to see what a repeal would restore.

Frequently Asked Questions

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