Can I deduct gambling losses on my Canadian income tax return?

Gambling and Canadian tax law occupy an unusual corner of the Income Tax Act, and the short answer is: for the vast majority of Ottawa players, gambling losses are not deductible — but the full picture depends on how the CRA characterises your gambling activity.

Why losses aren't deductible for most players

The logic flows directly from how winnings are treated. Lottery and certain other winnings are non-taxable in Canada — unless the taxpayer is in the business of gambling, in which case both proceeds and losses are considered for income tax purposes. Because casual gambling winnings fall outside taxable income entirely, there is no corresponding income source against which to offset losses. In the case of hobbies, neither amounts received nor expenses incurred are included in the income computation for tax purposes, and any excess of expenses over receipts is a personal or living expense, the deduction of which is denied. Recreational gambling is treated the same way: the government doesn't tax your wins, so it won't absorb your losses either.

This is confirmed on the CRA's own non-taxable amounts page, which lists lottery winnings of any amount, unless the prize can be considered income from employment, a business or property, or a prize for achievement — meaning the default is non-taxable, not a reportable source of income.

The narrow exception: gambling as a business

An individual's gambling activities may result in taxable business income or a business loss if the gambling activities constitute a source of income — that is, carrying on the business of gambling. If the CRA determines you are genuinely running a gambling business (think a professional poker player with systematic, commercial activity), then yes, losses could be deductible against that business income. But determining the commerciality of gambling can be challenging. Games of pure chance, like lotteries, lack the badges of trade to which the traditional tests of business activity can be applied. Traditional tests include evaluating a taxpayer's profit-making purpose and the commerciality of the activity — however, gambling is always undertaken in pursuit of profit. The courts have consistently found that simply wanting to win money doesn't make someone a professional gambler. The bar is high, the analysis is fact-specific, and the CRA scrutinises these claims carefully.

If you genuinely believe your online casino activity might cross into business territory, that's a conversation for a qualified Canadian tax professional — not something to self-assess.

One cross-border note for Ottawa residents

Some Ottawa-area players travel to the U.S. or play on U.S.-facing platforms. Worth knowing: if you received U.S. lottery or gambling winnings, you do not report this income on your Canadian income tax return as it is not taxable in Canada — and you cannot claim a credit for any taxes withheld on those winnings. The symmetry holds: non-taxable winnings mean no deductible losses.

For Ontario online play specifically, you're already in the right place by sticking to operators registered under iGaming Ontario — those sites carry both the iGaming Ontario and BetGuard logos, which confirm they're regulated by the AGCO. That's worth verifying at the iGaming Ontario registry before you deposit. And if gambling ever starts feeling less like a pastime and more like a financial pressure, ConnexOntario (1-866-531-2600) is available around the clock — that call is free and confidential.

The bottom line on taxes: keep playing on licensed Ontario sites (19+ only), enjoy your wins tax-free, and don't count on writing off your losses unless a tax advisor tells you otherwise based on your specific situation.