Should I consult a tax professional about my online casino winnings and what kind of accountant handles gambling income questions?

Canada's tax treatment of gambling winnings is genuinely unusual by international standards — and most Toronto players are pleasantly surprised when they learn the baseline rule.

The default position: casual winnings aren't taxable

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. The CRA draws a line between a recreational player and someone whose gambling activity constitutes a commercial enterprise, and the distinction matters enormously.

The CRA lists lottery winnings of any amount as non-taxable, unless the prize can be considered income from employment, a business or property, or a prize for achievement. Online casino winnings — slots, blackjack, poker sessions — generally fall into the same non-taxable windfall category for a casual player. The CRA's own Income Tax Folio on this topic sets out a series of factors that characterize a payment as a windfall: these include that the taxpayer made no organized effort to receive the payment, had no customary or specific expectation to receive it, and did not earn it as a result of any activity or pursuit of gain. A recreational player who logs on a few evenings a week fits that description comfortably.

When the picture gets complicated — and professional advice earns its fee

The casual/business line is where things get fact-specific, and it's exactly where a tax professional adds value. A few situations where you should absolutely talk to someone:

• You play at serious volume or with a systematic approach. If a taxpayer is in the business of gambling, the CRA considers the proceeds and losses for income tax purposes. High-frequency, high-stakes play — especially poker, where skill is more clearly a factor — can tip you from "recreational" into "business income" territory. That's taxable, but losses may then also be deductible.
• Your winnings are large enough that they're now generating investment income. Any interest you earn when you invest lottery or gambling winnings must be reported on your return. The win itself may be tax-free; what you do with the money afterward is not.
• You've been playing on offshore or unregistered platforms. This is a separate problem — those sites aren't part of Ontario's regulated market managed by iGaming Ontario and overseen by the AGCO. Stick to registered operators; you can verify them at the iGaming Ontario registry, and legitimate sites display both the iGaming Ontario and BetGuard logos.
• You're self-employed or run a business. Mixing gambling activity with a business profile adds complexity that a generalist tax preparer may not handle well.

Who to look for in Toronto

You don't need a niche "gambling accountant" — they don't really exist as a distinct category in Canada. What you need is a CPA (Chartered Professional Accountant) with experience in personal income tax and, ideally, some familiarity with self-employment or business income questions. The CRA issues technical income tax folios that are used primarily by tax specialists and other individuals who have an interest in tax matters — a CPA who handles complex personal returns will know this territory. CPA Ontario's member directory is a reasonable starting point for finding someone in Toronto.

If your situation involves very large sums or a genuine dispute with the CRA about whether your activity constitutes a business, a tax lawyer (rather than an accountant) may be the right call. For most players asking this question, though, a competent CPA who does personal tax returns is sufficient — one consultation to understand your specific facts is all it typically takes.

One practical note: keep records. Your online casino account history on any registered Ontario platform should show deposits, wagers, and withdrawals. That documentation is useful whether you're proving a windfall to the CRA or establishing losses if you are ever assessed as a business gambler.

ConnexOntario (1-866-531-2600) is available 24/7 if gambling ever becomes a source of stress rather than entertainment — worth knowing alongside the tax rules. Ontario's legal gambling age is 19+.