CasinoIQThe New 90% Gambling Loss Deduction Rule, Explained
For decades the deal was simple: itemize, and you could deduct gambling losses up to the amount of your winnings. Starting with tax year 2026, that deal got worse. Under the One Big Beautiful Bill Act, you can now deduct only 90% of your gambling losses — still capped at your winnings.
What changed
| Through 2025 | From 2026 | |
|---|---|---|
| Deductible losses | 100% of losses, up to winnings | 90% of losses, up to winnings |
| Must itemize (Schedule A) | Yes | Yes |
| Winnings taxable | All of them | All of them |
What it means in real dollars
Say in 2026 you win $100,000 and lose $100,000 — a perfectly break-even year:
- Old rule: deduct the full $100,000. Taxable gambling income: $0.
- New rule: deduct only $90,000. Taxable gambling income: $10,000 — on a year where you made nothing.
The higher your volume, the harder this bites. High-frequency players — slots regulars, poker grinders, advantage players — can now owe tax on phantom income even in losing years.
Who feels it most
- High-volume recreational players whose W-2G winnings pile up across the year
- Poker players with big gross swings between cash-outs and buy-ins
- Slots players, because every $1,200+ handpay generates a W-2G the IRS already knows about
How to protect yourself
- Document every single loss. With only 90% deductible, an undocumented loss is worth even less than before. You can't afford to "forget" losing sessions — they're the deduction.
- Track by session, contemporaneously. The session method (netting each continuous period of play) is your friend: it keeps reported gross winnings sane and is the record-keeping style the IRS expects. See how to track gambling losses for taxes.
- Don't rely on casino statements. Win/loss statements are estimates and routinely disputed. Your own dated log is stronger evidence.
- Talk to a tax professional if you play serious volume — filing as a professional gambler has different mechanics and its own trade-offs.
The takeaway: the 90% rule turns sloppy record-keeping from a risk into a guaranteed cost. From 2026 on, the players who track everything keep more of their money. Period.
Set yourself up in CasinoIQ before your next trip
- Log every session — wins and losses — with buy-in, cash-out, game, casino, and automatic date stamps.
- Watch your true position all year on the Stats screen: profit, ROI, and win/loss by game, so April is never a surprise.
- Generate the year-end Tax Report with one tap, and export CSV/JSON so your accountant can apply the 90% computation precisely.
The 90% rule punishes bad records. Keep perfect ones.
Free on the App Store · 4.8★ · One-tap year-end tax reports
This article is educational and not tax advice. Tax law changes; consult a qualified tax professional about your situation.