Crypto gambling taxes, explained

This is the single thing most players miss. When you win crypto on a casino, most tax codes treat that as ordinary income valued at the crypto's fair market value on the day you win it. That's the first taxable event — the income tax. Then when you sell that crypto (or spend it, or swap it into another token) at a different price later, you trigger a second taxable event — the capital gain or loss on the change in price since you received it.

Concrete example. You win 0.1 ETH at a casino on a day when ETH is $3,000. You owe income tax on $300 (gambling income at your ordinary rate). Six months later, ETH is at $4,000. You sell the 0.1 ETH for $400. You owe capital gains tax on the $100 difference between the $300 basis and the $400 sale price. Two separate tax events from one win.

The double tax is real and enforceable. The casino doesn't help you track it — you have to log the fair market value at the time of each win, each deposit, each withdrawal.

The IRS treats gambling winnings as ordinary income, reportable on Form 1040 regardless of size. Casinos issue a W-2G at certain thresholds for traditional gambling (typically $1,200+ on a single slot win, $5,000+ on certain wagering outcomes with 300:1 odds), but offshore crypto casinos do not issue W-2Gs. The obligation to report remains.

Capital gains on the crypto sold after the win are reported on Form 8949 with Schedule D. Short-term (under one year held) is taxed at your ordinary income rate; long-term at the preferential capital gains rate.

2026 brings Form 1099-DA, which US exchanges are starting to issue for crypto sales. This makes it substantially easier for the IRS to match your cost basis and sale price — which makes under-reporting substantially more risky. If your exchange issues a 1099-DA for sold crypto that came from a casino win, the IRS can see the sale but can't see the winning event. Reporting the income side is your responsibility.

Losses: You can deduct gambling losses against gambling winnings only if you itemise deductions, and only up to the amount of winnings. You cannot net-loss gambling activity against other income.

Gambling winnings in the UK are not taxable. This is the genuine exception among major jurisdictions. If you win £1,000 on a crypto casino as a UK tax resident, you do not owe income tax or capital gains tax on the winning event itself.

The catch is the crypto volatility. If you receive crypto as a casino win, subsequent price changes when you sell, swap or spend it are subject to HMRC's capital gains treatment of crypto — which does apply. So the win is tax-free, but the tokens you received are still a taxable asset with a basis at the value when you won them.

Professional gamblers are a separate case — HMRC can treat habitual betting income as trade income if the profile fits, which would make it taxable. In practice, this is rarely applied to casino play, more commonly to betting-syndicate operations.

No unified rule. Each member state taxes gambling independently. Germany, France and Spain tax significant winnings as income. Sweden, Finland and some smaller members broadly follow the UK model of tax-free gambling. Italy has specific online-casino tax treatment.

Crypto-specific rules often apply on top. Germany's MiCA-aligned crypto framework and Spain's wealth-tax treatment of crypto holdings can make the tax picture substantially more complex than on fiat gambling.

Check your specific country's revenue authority. The answer for an EU resident is 'it depends, meaningfully'.

Brazil's SIGAP framework (live since 2025) imposes specific reporting requirements on licensed operators and on players. Winnings above certain thresholds are reported to the Receita Federal; players are responsible for declaring gambling income on their annual return.

Colombia's Coljuegos-regulated market has similar reporting infrastructure. Operators in regulated LATAM markets are increasingly transparent to tax authorities — the 'crypto gambling is untaxed' intuition doesn't hold here.

Tooling — Koinly, CoinLedger, TokenTax — can import crypto casino transactions if you plug in the deposit and withdrawal addresses. The tooling can't read your session-by-session wins inside the casino, so it treats the deposit and withdrawal as the only events. That's incorrect under most tax codes because you may have had intermediate tax events on wins.

Minimum viable record for an offshore crypto casino player: date of deposit, amount and value at deposit time, date of each withdrawal, amount and value at withdrawal time, running note of significant single-session wins if your jurisdiction distinguishes them. Keep the data in a spreadsheet. Your CPA will thank you in April.