What kind of records should I keep if I gamble regularly at Ontario online casinos?

Keeping records when you gamble regularly is genuinely useful for a few distinct reasons — tax clarity, personal financial oversight, and being able to demonstrate where your money came from if anyone ever asks. Here's what actually matters.

The tax picture first

Lottery winnings of any amount are not taxable in Canada, unless the prize can be considered income from employment, a business, or property. The same general principle applies to casino winnings. The traditional test for whether an activity constitutes a business involves evaluating the taxpayer's profit-making purpose — but gambling is always undertaken in pursuit of profit. Canadian courts have addressed this directly, finding that the intention to win money, "which is there in all who gamble, does not lead to a conclusion that all who gamble, or even all those who gamble frequently, are carrying on a business."

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 cases where gambling has been held taxable relate to taxpayers who applied inside information, knowledge, and skill to their activities. For the overwhelming majority of Ottawa players who gamble for entertainment, winnings are not taxable income. That said, the line is fact-specific, and if you're gambling at a scale or sophistication that blurs into a systematic, business-like operation, you'd want a tax professional's view.

Even if your winnings aren't taxable, good records still protect you. Non-taxable winnings can become relevant when the CRA is trying to identify the source of funds supporting a taxpayer's lifestyle, bank deposits, or asset accumulation. If you state that the source of funds is gambling winnings, you'll be asked to support those winnings and losses for all significant amounts. In other words: the burden of proof lands on you.

What to actually keep

For players on Ontario's regulated online platforms, the operator's own account history does a lot of the heavy lifting — your deposit records, session history, and withdrawal logs are all timestamped and stored on the platform. Download or screenshot these periodically rather than relying on the operator to hold them indefinitely. Beyond that, maintain:

• Bank and payment records. Keep statements showing every transfer to and from your gaming accounts. These corroborate your deposit and withdrawal history independently of the operator.
• A simple running log. Date, platform, game type, amount deposited, amount withdrawn. A spreadsheet or even a notes app entry after each session is enough. This is especially useful if your activity is substantial enough that anyone might ever question the source of funds.
• Proof of identity and account ownership. Hold onto any KYC (know-your-customer) documents you submitted when registering — these confirm the account is yours if there's ever a dispute.
• Large win documentation. For any notably large withdrawal, save the confirmation email and the corresponding bank credit. Documents that support winnings and losses for significant amounts are exactly what gets requested if the CRA ever reviews your file.

Playing on a regulated Ontario site makes this easier

One practical advantage of sticking to the regulated Ontario market — sites registered with the AGCO and managed by iGaming Ontario — is that your account history is structured and auditable. Look for the iGaming Ontario logo wherever you play as a sign that you're playing on a site conducted and managed by iGaming Ontario, offering player protections and meeting Ontario's standards for game integrity and responsible gambling. Regulated sites also display the BetGuard logo, which is another quick confirmation you're on a legitimate, accountable platform — not an offshore operator with no record-keeping obligations to you.

Speaking of BetGuard: you can opt out of all regulated online gambling in Ontario with BetGuard, choosing a term of 6 months, 1 year, 5 years, or a custom term. It's worth knowing that tool exists if you ever want a break — and your account records will still be there when you need them regardless.

One last point on the tax side: if your gambling activity is extensive enough that you're genuinely uncertain about your tax position, get advice from a Canadian tax professional who knows the CRA's position on this. The rules are fact-dependent, and the CRA's own guidance (Income Tax Folio S3-F9-C1) is the authoritative starting point. Don't rely on general forums or affiliate sites for anything tax-related. ConnexOntario (1-866-531-2600) is there if you ever want to talk through your gambling habits with someone, too.