How does Canada's tax treatment of gambling winnings compare to countries like the United States?

Canada and the United States share a border and a lot of cultural overlap, but on this particular question they land in almost opposite positions — and the gap matters practically for any Ontario player.

Canada: winnings are generally not taxable income

Lottery and certain other winnings are non-taxable in Canada. However, if the taxpayer is in the business of gambling, the proceeds and losses must be considered for income tax purposes. That second part is where the nuance lives.

An individual's gambling activities may result in taxable business income or a business loss — but only if those activities constitute a source of income, meaning carrying on the business of gambling. Determining the commerciality of gambling can be challenging. The CRA's own guidance acknowledges the difficulty: gambling — even regular, frequent and systematic gambling — is something that by its nature is not generally regarded as a commercial activity except under very exceptional circumstances.

There are some exceptional cases where gambling activities have been held to be taxable, but these relate to taxpayers who applied inside information, knowledge and skill to their activities — for example, a pool player who would challenge inebriated opponents was held to be taxable on his winnings. For the vast majority of recreational players, the CRA treats winnings as a windfall. Factors indicating a windfall include: the taxpayer made no organized effort to receive the payment, had no customary or specific expectation to receive it, had no reason to expect it would recur, and the payment was not earned as a result of any activity or pursuit of gain.

One catch worth knowing: any interest you earn when you invest lottery winnings must be reported on your return — the winnings themselves are clean, but the investment income they generate is not.

The United States: an entirely different framework

South of the border, the IRS treats gambling winnings as fully taxable ordinary income — full stop. All gambling winnings, from casinos, lotteries, and sports betting, must be reported on a federal tax return. Operators are required to issue W-2G forms and withhold federal income tax on larger prizes. Players can deduct gambling losses, but only up to the amount of their winnings, and only if they itemize deductions rather than taking the standard deduction. The practical result is that a U.S. recreational gambler who hits a big win at a casino walks away with meaningfully less after tax than their Canadian counterpart in an equivalent situation.

The cross-border dimension is also worth flagging directly. If you received U.S. lottery or gambling winnings while visiting the U.S., you do not report this income on your Canadian income tax return, as it is not taxable in Canada. Additionally, you cannot claim a credit for any taxes withheld on those winnings. That last point stings a little — if a U.S. casino withholds tax from your jackpot because you're a non-resident, you generally cannot recover it through your Canadian return. There are treaty-based mechanisms to reclaim U.S. withholding tax, but that's a conversation for a cross-border tax professional, not a CRA filing.

What this means for Ontario online players specifically

Playing on a registered Ontario online casino — one displaying the iGaming Ontario and BetGuard logos, which confirms it's managed by iGaming Ontario and regulated by the AGCO — puts you squarely in Canada's tax framework. Your winnings from those sessions are treated the same as winnings from any other Canadian gambling context: not taxable as income for a recreational player, though you should keep records if your activity is anything more than casual.

The takeaway is simple: Canada's treatment is far more player-friendly than the U.S. model for recreational gamblers. None of this is personal tax advice — your specific situation, particularly if you gamble at high volume or professionally, warrants a conversation with a tax advisor. The CRA's Income Tax Folio S3-F9-C1 is the authoritative reference if you want to read the rules directly.

If gambling ever starts feeling less like leisure and more like a problem, ConnexOntario (1-866-531-2600) is available 24/7. Ontario's legal gambling age is 19+.