Do I need to report my online casino winnings when filing my Canadian tax return?

For the vast majority of Toronto players, the answer is no — casino winnings are not taxable income in Canada and don't need to be reported on your T1 return. But there's a meaningful exception that's worth understanding clearly.

The general rule: gambling winnings are not taxable

Lottery winnings of any amount are listed by the CRA among amounts that are not taxable — unless the prize can be considered income from employment, a business, or property. The same principle extends to casino and online gambling winnings for recreational players. Lottery and certain other winnings are non-taxable in Canada — however, if a taxpayer is in the business of gambling, the proceeds and losses are considered for income tax purposes.

So if you play on a licensed Ontario online casino in your spare time, hit a slot jackpot, or run hot at the blackjack tables, that money is yours free and clear from a tax perspective. The CRA doesn't issue T-slips for casino payouts, and Ontario's licensed operators don't withhold tax on withdrawals.

The exception: when gambling becomes a business

This is where it gets more nuanced. An individual's gambling activities may result in taxable business income or a business loss — this will be the case if the gambling activities constitute a source of income (that is, carrying on the business of gambling). Determining the commerciality of gambling can be challenging.

Traditional tests to determine the existence of a business include an evaluation of a taxpayer's profit-making purpose and the commerciality of their activity — but gambling is always undertaken in pursuit of profit. The CRA recognizes this complication. Courts have made clear that simply intending to win, or even winning regularly, doesn't automatically make someone a professional gambler. The full picture matters: whether you employ a systematic method, dedicate substantial time to it, keep records, and treat it with the discipline of a trade.

In practice, the CRA classifying a recreational player as a gambling business is rare. But if you're a serious poker player who grinds consistently, maintains detailed session records, and derives meaningful income from the activity, it's worth getting a tax professional's opinion — because if the CRA does consider you to be carrying on a gambling business, your winnings become taxable and your losses potentially deductible.

One thing that IS always taxable: returns on invested winnings

Income earned on non-taxable amounts is taxable. For example, any interest that you earn when you invest lottery winnings must be reported on your return. So if you win $50,000 at an online casino and put it in a GIC or investment account, the interest or returns that money earns become ordinary taxable income. The original win stays non-taxable; what it generates afterward does not.

Playing on a licensed Ontario site matters

None of this analysis changes based on which licensed Ontario operator you use — the tax treatment is a federal matter. What does matter is playing on a site that's actually registered with iGaming Ontario and regulated by the AGCO. You can verify any operator by checking the full list on the official iGaming Ontario registry; legitimate sites also display the iGaming Ontario and BetGuard logos. Offshore, unregistered sites carry their own risks entirely separate from the tax question.

If you ever feel gambling is becoming more stressful than fun, ConnexOntario (1-866-531-2600) is the province's free, confidential support line — available 24/7. Ontario's regulated market is open to players 19 and older.

Bottom line: keep your winnings, don't stress about your T1, and if your situation is genuinely complex — high-volume play, professional-level activity — a Canadian tax accountant is the right call.