Tax Considerations for American Bettors

For the 2026 tax year, a bettor who wins $50,000 and loses $50,000 can owe federal tax on $5,000 of income they never received. That rule is new, it is in effect right now, and most bettors have not adjusted for it.

Taxes are the least discussed and most consequential topic in this section. A bettor grinding out a 3 percent return on investment, per the targets we set throughout the sport sections, can have a meaningful share of that return consumed by a tax treatment they did not plan for.

The 2026 tax year makes this worse than it has been in seventy years, because of a change that took effect on January 1.

01The Foundation: Winnings Are Income

Gambling winnings are taxable income under U.S. federal law. This includes sports betting, casino games, poker, lotteries, and fantasy contests. It applies whether or not you receive a tax form from the operator.

Winnings are reported as other income on your federal return. The critical structural point, and the source of nearly every complication that follows, is that you report winnings and losses separately. The IRS does not permit you to net them and report the difference.

That asymmetry is why a bettor who breaks even can still have a tax obligation. On the income side, every winning wager counts. On the deduction side, losses are subject to restrictions that winnings are not.

02The Itemization Problem

Before the 2026 change, there was already a barrier that eliminated loss deductions entirely for most American bettors.

Gambling losses are deductible only if you itemize. They go on Schedule A. If you take the standard deduction, you cannot deduct gambling losses at all, while still owing tax on every dollar of winnings.

The 2017 tax law roughly doubled the standard deduction, and it has risen with inflation since. For the 2025 tax year filed in April 2026, the standard deduction was $16,100 for single filers and $32,200 for married couples filing jointly. The large majority of American households take it.

The practical consequence for a typical recreational bettor: winnings are fully taxable and losses are entirely non-deductible. Not partially. Entirely.

This alone can turn a break-even season into a real financial loss, and it has been true for years without most bettors noticing, because most bettors do not track winnings separately from losses in the first place.

03What Changed for 2026: The 90 Percent Limit

The One Big Beautiful Bill Act, signed in July 2025, amended Section 165(d) of the tax code. Beginning with the 2026 tax year, the deduction for wagering losses is limited to 90 percent of those losses.

The prior rule, in place for roughly seventy years, allowed a deduction of 100 percent of losses up to the amount of winnings. That ceiling remains: you still cannot deduct more in losses than you won. The new 90 percent haircut applies on top of it.

What it looks like in practice

Example one. You win $10,000 and lose $10,000. You itemize.

• Under the old rule: deduct the full $10,000. Zero taxable gambling income.
• Under the 2026 rule: deduct 90 percent, or $9,000. You owe tax on $1,000 despite breaking even.

Example two. You win $250,000 and lose $250,000.

• Deduction limited to $225,000. Taxable gambling income of $25,000 on a break-even year.

Example three. You win $10,000 and lose $12,000, a genuine losing year.

• 90 percent of $12,000 is $10,800, which exceeds your $10,000 in winnings.
• The deduction is still capped at winnings, so you deduct $10,000 and owe nothing on gambling income.
• The excess $2,000 in real losses provides no benefit and does not carry forward.

The pattern the industry has named phantom income: tax owed on money the bettor never actually received.

04Where the Repeal Effort Stands

The change drew immediate bipartisan objection and several bills have been introduced to reverse it.

• Representative Dina Titus of Nevada introduced the FAIR BET Act in July 2025 to restore the full 100 percent deduction. In January 2026 the House Rules Committee declined to advance it as an amendment to the National Defense Authorization Act, and it now sits with the House Ways and Means Committee.
• Senator Catherine Cortez Masto introduced companion legislation in the Senate, where an attempt to fast-track it was blocked on procedural grounds.
• The FULL HOUSE Act, introduced in January 2026 with bipartisan sponsorship, proposes substantially the same restoration.
• Not all Senate opinion favors reversal, and no repeal has passed.

As of this writing, the 90 percent limit is in effect for the 2026 tax year. That may change, possibly with retroactive effect, and anyone with meaningful gambling activity should track it and speak with a professional rather than assuming either outcome.

05Reporting Forms and Withholding

Operators report certain payouts to the IRS, and understanding when helps you anticipate the paperwork.

Form W-2G. For sports betting and similar pari-mutuel wagering, a W-2G is generally issued when winnings are $600 or more and at least 300 times the amount wagered. A $10 bet returning $3,000 triggers it. A $1,000 bet returning $1,900 does not.

Backup withholding. Where withholding applies, the standard rate is 24 percent. This is a prepayment against your eventual liability, not a final tax.

The reporting gap. Most sports wagers do not meet the 300-to-1 threshold, so most bettors receive no W-2G at all. This does not make the winnings non-taxable. The obligation to report exists regardless of whether a form was issued, and books provide annual statements that make the numbers available.

06The Definition Problem: What Counts as a Win

Here is where the arithmetic gets genuinely difficult and where professional advice becomes necessary rather than optional.

The IRS generally treats each wager as a separate transaction for recreational gamblers. Under that approach, a bettor who places 500 wagers has 500 separate events, each either a win to be reported or a loss to be deducted.

A bettor who wins 260 and loses 240 across a season at $110 per wager has gross winnings well into six figures and gross losses close behind, even though the net result might be a few thousand dollars. Those gross figures, not the net, are what drive the calculation.

A "session" concept has been applied in some gambling contexts to group activity within a period, but its application to sports betting is not straightforward. This is precisely the kind of question where a CPA who works with gambling clients earns their fee, and where a bettor guessing on their own is likely to guess wrong in one direction or the other.

07Professional Gambler Status

A taxpayer who gambles as a genuine trade or business rather than as a recreational activity may file differently, reporting on Schedule C and potentially deducting ordinary business expenses.

Points worth understanding before this looks appealing:

• The bar is high. Courts have examined factors including whether the activity is pursued full time, in good faith, with regularity, and with the primary purpose of producing income.
• The loss limitation still applies. Section 165(d) governs wagering losses regardless of filing status, including the new 90 percent limit.
• Self-employment tax enters the picture, which is a real cost that can offset the benefits.
• It is not elective. You do not choose professional status. Your facts determine it, and claiming it without support invites scrutiny.

We return to what professional betting actually requires in Post 92. The tax dimension is one of several reasons the honest assessment there is more sober than the fantasy.

08State Taxes Vary Enormously

Federal treatment is only part of the picture, and state rules are less uniform.

• Some states have no income tax, so gambling winnings face no state-level obligation.
• Some states tax gambling winnings and permit loss deductions similar to the federal approach.
• Some states tax gross gambling winnings and permit no loss deduction at all. In those states, a break-even bettor with high volume can face a substantial state tax bill.
• Some states tax winnings earned within their borders regardless of residency, which matters if you bet while traveling.

This variation is large enough that it should factor into how much volume you run. Two bettors with identical results in different states can face materially different after-tax outcomes.

09Records You Should Be Keeping

Substantiation is the taxpayer's responsibility, and the tracking discipline from Post 85 serves this purpose directly.

A contemporaneous log should capture:

1. Date and type of wager.
2. Name of the operator and the account used.
3. Amount wagered.
4. Amount won or lost on each wager.
5. Supporting documentation: annual statements, transaction histories, W-2G forms, and deposit and withdrawal records.

Every regulated U.S. operator provides downloadable transaction history and an annual summary. Download them at year end rather than assuming they will remain accessible, and keep them with your tax records.

10How This Changes Betting Decisions

Tax treatment is not merely an administrative matter. It affects strategy, and this section would be dishonest if it pretended otherwise.

Volume carries a cost it did not carry before. If losses are only 90 percent deductible, every additional wager adds gross winnings and gross losses to the calculation. A strategy generating enormous turnover for a thin margin is more exposed than one generating fewer, larger edges.

Arbitrage economics worsen. As flagged in Post 79, an arbitrage produces a winning bet and a losing bet by design. Under a 90 percent deduction limit, a 2 percent arbitrage return can be substantially eroded, and for a bettor taking the standard deduction it can be eliminated entirely.

Hedging has the same problem. A hedge creates offsetting positions, and offsetting positions are exactly what this rule penalizes.

Itemization math changes. A bettor with significant gambling activity may cross the itemization threshold when they previously would not, which requires actually running the numbers rather than assuming.

None of this means stop betting. It means the after-tax return on a strategy is not the same as the pre-tax return, and the gap is wider for high-volume approaches than most bettors have modeled.

11Common Tax Mistakes

• Assuming no form means no obligation. Most sports wagers generate no W-2G. The winnings remain reportable.
• Reporting net rather than gross. The IRS requires separate reporting of winnings and losses.
• Assuming losses are deductible. Only if you itemize, only up to winnings, and now only at 90 percent.
• Not tracking gross figures. Net profit is the one number the calculation does not use.
• Ignoring state rules. Some states permit no loss deduction whatsoever.
• Claiming professional status casually. It is determined by facts, not by preference.
• Losing access to records. Download operator statements at year end.
• Not planning for the liability. A bettor who spends their winnings and owes tax in April has a cash flow problem that was entirely predictable.

12The Bigger Picture

Eighty-two posts of this series have been about finding an edge. This one is about how much of that edge you actually keep, and it is uncomfortable in a way the others are not.

A bettor targeting 2 to 4 percent return on investment, the realistic figure we have used throughout, is operating on a thin margin by design. A tax treatment that assesses income on a break-even season is not a rounding error against that margin. It can be the whole thing.

What that argues for is not despair but planning. Know the rules that apply to you, in your state, at your volume. Keep records that make the calculation possible. Set aside money for a liability you can anticipate. And speak with a professional who has seen gambling returns before, because the questions in Section 06 are not ones an individual should be answering alone.

The bettors who get hurt by this are not the ones who planned badly. They are the ones who never thought about it at all, discovered it in April, and had already spent the money.