How do Canadian tax rules for gambling differ from those in the United States?

If you're a Toronto player who's ever pulled a decent win from an iGaming Ontario site and wondered whether you owe the CRA a slice of it — that question is completely reasonable, and the answer is genuinely different from what your American counterparts face.

Canada: windfalls are not income (with a meaningful exception)

The CRA explicitly lists lottery winnings of any amount among the amounts Canadians do not need to report on their tax return — unless the prize can be considered income from employment, a business or property, or a prize for achievement. The same logic applies to casino and online gambling wins for the vast majority of recreational players. The CRA treats a typical gambling win as a windfall, not a source of income, so it doesn't appear on your T1 at all.

There is, however, a real exception worth understanding. An individual's gambling activities may result in taxable business income or a business loss if those activities constitute a source of income — that is, if the person is carrying on the business of gambling. Determining the commerciality of gambling can be challenging. Canadian courts have addressed this directly: 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 the overwhelming majority of people playing slots, blackjack, or sports betting on a licensed Ontario platform for entertainment, none of this applies.

One nuance worth knowing: any interest that you earn when you invest lottery or gambling winnings must be reported on your return. The win itself isn't taxable; the investment returns it generates are.

The United States: a fundamentally different regime

South of the border, the IRS treats gambling winnings as ordinary taxable income — full stop. Every dollar won at a casino, sportsbook, or online platform must be reported on a federal return, regardless of amount. US casinos and gaming operators are required to issue a W-2G form when winnings cross certain thresholds, and federal withholding applies automatically on larger payouts. American gamblers can offset their winnings with documented gambling losses, but only up to the amount of their winnings, and only if they itemize deductions rather than taking the standard deduction — a limitation that catches many casual players off guard.

The contrast with Canada is stark: a Toronto player keeps their $5,000 online blackjack session entirely tax-free; a player in Michigan owes federal (and state) income tax on that same amount.

What happens if you win in the US as a Canadian resident?

This is where it gets practical for Torontonians who travel. If you received US lottery or gambling winnings, you do not report this income on your Canadian income tax return, as this income is not taxable in Canada. Additionally, you cannot claim a credit for any taxes withheld on those winnings. US casinos will often withhold a portion of a Canadian's winnings at source. Recovering that withheld amount requires filing a US non-resident return — a process worth discussing with a cross-border tax professional, since the rules around treaty relief are specific to your situation.

Playing on a registered Ontario iGaming site avoids this complexity entirely. The online market here is regulated by the AGCO and managed by iGaming Ontario; you can confirm a site is legitimate by looking for both the iGaming Ontario and BetGuard logos. The legal age to play is 19+. If gambling ever becomes something other than entertainment, ConnexOntario (1-866-531-2600) is available around the clock.

The bottom line for most Toronto players: Canadian tax law is genuinely more favourable for recreational gamblers than US law. Your wins from licensed Ontario online casinos are not reportable income. If your situation is unusual — very high volume, professional-level play, or cross-border winnings — a tax professional familiar with both CRA guidance and US non-resident rules is the right call. The CRA's own Income Tax Folio S3-F9-C1 is the primary authoritative source on gambling and lottery receipts and is publicly available on Canada.ca.