Last updated ·Published ·By the WiserWork team
Gambling Tax Calculator: the 2026 90% Loss Cap
What you owe on winnings, what losses can offset, and when the casino files a W-2G
Short answer: Gambling winnings are fully taxable as ordinary income and must be reported whether or not the payer issues a Form W-2G. From tax year 2026 you may deduct only 90% of your wagering losses, and only up to the amount you won — and only if you itemise. Before 2026 the deduction was 100% of losses up to winnings.
Worked example: Win $12,000, lose $9,000. You report the full $12,000, then deduct 90% × $9,000 = $8,100, leaving $3,900 taxable. Under the old rule you would have deducted the whole $9,000 and been taxed on $3,000 — the cap costs you $900 of deduction.
Source: IRS Topic 419 — Gambling income and losses. The 90% limit was added by the One Big Beautiful Bill Act amendment to §165(d).
| W-2G issued at… | Game | Withholding |
|---|
Gambling taxes have a design that surprises every winner: all winnings are ordinary income — from jackpots to a $20 scratch-off — while losses deduct only if you itemize, only up to winnings, and (from 2026) only at 90 cents on the dollar. The result: a bettor who wins $12,000 and loses $9,000 "made" $3,000 but may owe tax on the full $12,000. This calculator runs the honest math, the W-2G thresholds that trigger paperwork, and the record-keeping that protects the loss deduction.
The Asymmetry, Spelled Out
| Side | Treatment |
|---|---|
| Winnings | 100% ordinary income on Schedule 1 — reported whether or not any form was issued |
| Losses | Itemized deduction only, capped at winnings (never a net loss deduction), and capped at 90% of losses from 2026 |
| The standard-deduction trap | ~90% of filers don't itemize — their losses deduct $0, and they're taxed on gross wins |
W-2G: When the Paper Trail Starts
Casinos and books issue Form W-2G at game-specific thresholds — $1,200 slots, $1,500 keno, $5,000 poker tournaments, and $600-plus-300× odds for lotteries and sports — with 24% federal withholding on the big ones. Two things every bettor should know: the W-2G goes to the IRS (unreported W-2G income generates automatic matching notices), and the absence of a W-2G changes nothing legally — your $800 parlay win is taxable income with or without paperwork. Online sportsbooks' annual statements make your activity fully visible either way.
Sessions, Logs and Surviving the Loss Deduction
- You can't just report the net. Wins aggregate as income; losses deduct separately. (Casual slot players may treat each gambling session as one win/loss — helpful — but session netting across the year is not allowed.)
- The log is the deduction: the IRS standard is a contemporaneous record — date, venue/platform, game, amounts won/lost — plus tickets, statements and win/loss reports. Online accounts generate this automatically; casino players should use their players-card win/loss statement as backup, not primary, evidence.
- State taxes stack: most states tax winnings; several (including some with lotteries) disallow loss deductions entirely — a worse asymmetry than federal.
The 2026 Change: the 90% Cap
New law caps deductible losses at 90% of actual losses from 2026: a break-even year (win $100k, lose $100k) now shows $10,000 of phantom income. For casual bettors it's a haircut; for high-volume and professional players it's existential — a 1%-edge pro can owe more tax than profit. Professionals (Schedule C filers with genuine profit motive) deduct losses and expenses against winnings but pay SE tax; the bar for "professional" status is high and litigated.
How to Use the Calculator
- Enter the year's total wins and losses (your sportsbook statements or session log).
- Set your bracket, whether you itemize, and the rule year.
- Read the tax, the actual net, and — most usefully — the note that tells you which trap applies to you.
Frequently Asked Questions
Do I really owe taxes on small wins with no W-2G?
Legally, yes — all winnings are income regardless of paperwork. Practically, enforcement runs through W-2Gs and online-platform records, and online betting is fully visible. Report honestly; the standard-deduction trap is the real cost, not the reporting.
Can I subtract my losses from my wins before reporting?
No — that's the central error. Gross wins are income; losses are a separate itemized deduction capped at wins. Only within a single casual gambling session may results net.
The casino withheld 24% — am I done?
That's a deposit, not the bill: your true rate is your marginal bracket (possibly higher than 24%, plus state). Big wins can also push you into IRMAA/credit phaseouts. Settle up at filing; the Tax Refund Estimator shows the year's picture.
How does the lottery lump sum get taxed?
As ordinary income in the year received — a big jackpot lands mostly in the 37% bracket plus state tax. Annuity payments spread the income (and brackets) over 30 years; the lump-vs-annuity choice is a real calculation, not a reflex.
What makes someone a 'professional gambler'?
Regular, continuous activity with genuine profit intent and businesslike records — a facts-and-circumstances test courts apply skeptically. Pros file Schedule C: losses and expenses deduct against winnings, SE tax applies, and the 2026 90% cap still bites.
Do casinos' win/loss statements prove my losses?
They help but aren't gospel — the IRS treats them as estimates. Your own contemporaneous log plus the statement is the combination that survives exams.
Is my information private?
Yes — every figure computes locally in your browser.
Bet knowing the house edge includes the tax code: wins are income, losses need itemizing and a log, and 2026 taxes even break-even years. Keep the session log from January 1 — it's the cheapest insurance in gambling.