How does a tax professional typically assess whether a Canadian gambler owes taxes on their winnings?

Canada's default position on gambling winnings is straightforward: for the vast majority of recreational players, they're simply not taxable. Lottery winnings of any amount are excluded from income — unless the prize can be considered income from employment, a business or property, or a prize for achievement. That carve-out — the "business" exception — is exactly where a tax professional earns their fee.

If you're a 19+ player in Ottawa spinning slots or playing blackjack on one of Ontario's regulated online casinos, the odds are strongly in your favour that your winnings fall on the non-taxable side. But a tax professional asked to assess your situation won't just take your word for it. Here's the framework they actually use.

The core question: hobby or business?

An individual's gambling activities may result in taxable business income or a business loss — but only if the gambling activities constitute a source of income, meaning the person is carrying on the business of gambling. That sounds clean in theory; in practice it's genuinely hard to pin down. Determining the commerciality of gambling is challenging because games of pure chance, like lotteries, lack the badges of trade to which traditional tests of business activity can be applied.

The CRA's own technical guidance acknowledges the obvious problem: traditional tests to determine the existence of a business include an evaluation of a taxpayer's profit-making purpose and the commerciality of the activity — but gambling is always undertaken in pursuit of profit. Everyone who places a bet wants to win. So wanting to profit isn't enough on its own.

The four factors a tax professional examines

The issue of whether a taxpayer's activities constitute carrying on a gambling business is a question of fact, determined by an examination of all circumstances and the taxpayer's entire course of conduct. Although no single factor is conclusive, the criteria to consider include: the degree of organization present in the pursuit of the activity; the existence of special knowledge or inside information that reduces the element of chance; the taxpayer's intention to gamble for pleasure compared with any intention to gamble for profit as a means of gaining a livelihood.

Courts have reinforced that even regular, frequent gambling doesn't automatically tip the scales. 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. The exceptional cases that have been found taxable share a common thread: they relate to taxpayers who applied inside information, knowledge, and skill to their activities.

What does "skill" look like in practice? In one case, a pool player who in cold sobriety would challenge inebriated pool players was held to be taxable on his winnings — the edge was systematic, deliberate, and repeatable. That's a far cry from a recreational Ottawa player logging into a licensed Ontario casino on a Friday night.

What records and context the professional will want to see

A tax advisor will typically ask for transaction histories, bank statements, and any logs you keep of sessions, stakes, and results. They're looking for evidence of whether you approached gambling with a business mindset — consistent record-keeping, a strategy designed to generate reliable profit, reliance on gambling income to cover living expenses — or whether it was genuinely recreational. The absence of systematic record-keeping actually tends to support the recreational interpretation.

One important nuance: income earned on gambling winnings is taxable. For example, any interest earned when you invest lottery winnings must be reported on your return. So even if your original winnings are non-taxable, whatever those winnings earn once they're sitting in a savings account or investment is a different matter entirely.

If you're gambling on Ontario's regulated market — sites that carry both the iGaming Ontario and BetGuard logos — your transaction history from those platforms is readily retrievable, which makes any professional assessment much cleaner. For players who are genuinely unsure about their situation (perhaps they play at high volume or with a structured approach), a consultation with a Canadian tax professional familiar with CRA's Income Tax Folio S3-F9-C1 is the right move. The CRA's own guidance on this is publicly available at canada.ca.

And if gambling ever starts feeling less like entertainment and more like something you need to manage, ConnexOntario is available at 1-866-531-2600.