A side project that starts making money raises a real question: is this a business now, with all the reporting obligations that come with it, or is it still just a hobby that happens to bring in a bit of cash? The CRA has a specific framework for this, and getting it wrong runs in both directions.

Why This Distinction Actually Matters

Income from a genuine business needs to be reported, and expenses against it can be deducted. A true hobby's income isn't generally taxable, but its costs aren't deductible either. Misclassifying a hobby as a business can mean claiming deductions that aren't legitimate; misclassifying a business as a hobby can mean failing to report income that should have been declared.

The Core Question: Commercial Activity or Personal Endeavour?

The starting question isn't simply "is there a reasonable expectation of profit" — that older framing was replaced by a Supreme Court of Canada decision years ago. The actual first question is whether the activity is a commercial activity or a personal endeavour. If the activity is clearly commercial, with no significant personal or recreational element, that will generally establish it as a source of business income without requiring a further assessment of whether the activity is likely to be profitable.

Reasonable expectation of profit still matters, but only as one factor that gets weighed once there's some personal or hobby element mixed into the activity. In that situation, the activity is treated as a genuine business only if it's being carried on in a sufficiently commercial manner — meaning there's an actual intention to profit, backed up by businesslike behaviour that supports that intention.

What Points Toward "Business" Rather Than "Hobby"

Consistent effort to generate sales, a business plan or at least a clear commercial intention, marketing or advertising activity, professional-level record-keeping, and a pattern of activity that resembles how someone in that industry would actually operate all point toward business classification. No single factor decides it on its own — the CRA looks at the overall pattern together, not one item on a checklist. None of these factors is mandatory by itself: a business can be entirely legitimate without a formal business plan, a website, or paid advertising. The question is what the activity looks like as a whole, not whether every box gets checked.

As an example: someone who enjoys woodworking and occasionally sells a cutting board to a friend, without advertising or trying to build repeat business, looks like a hobby. The same person building a website, posting on social media, taking custom orders, and actively tracking expenses and sales looks like a business — even before it turns a profit.

What Points Toward "Hobby"

An activity pursued primarily for personal enjoyment, with income that's incidental rather than the point of the activity, minimal effort to actually grow or market it, and no real commercial pattern behind it, tends to be classified as a hobby rather than a business, even if it occasionally generates some income. Genuinely enjoying the work isn't what makes something a hobby, though — plenty of real businesses are run by people who love what they do. What matters is whether that personal enjoyment is the whole point, or whether there's also a real commercial operation running alongside it.

Losses Don't Automatically Mean It's a Hobby

A new business running at a loss for a while is normal, not a sign it's secretly a hobby. The question isn't whether the activity has actually turned a profit yet — it's whether there's a genuine commercial operation behind it, with real intention and businesslike behaviour supporting that intention. A struggling business is still a business; the losses themselves don't reclassify it.

Why the Line Isn't Always Obvious

Many activities sit genuinely close to this line — a hobby that starts generating consistent income can gradually cross into business territory without a single clear moment where that happened. The CRA looks at the overall pattern of activity, not a single factor, which is exactly why borderline cases benefit from being reviewed against the specific facts rather than assumed one way or the other.

FAQ

Does a hobby that occasionally sells something need to register a business or report the income? If the activity is genuinely a personal endeavour and any sales are incidental rather than the point of it, the tax treatment is different from a business. Once the activity starts operating in a genuinely commercial manner — actively marketed, run with an intention to profit, and treated like an ongoing operation — reporting obligations generally follow.

Can an activity be reclassified from hobby to business partway through a year? Yes — an activity can evolve from a personal endeavour into a business as its nature and operation change. The tax treatment should reflect the actual facts of the activity during the relevant period, rather than assuming the whole year had one single classification.

Is there a specific income threshold that automatically makes something a business? No — the test is about the nature and pattern of the activity, not a specific dollar amount of income earned.

What happens if a hobby is treated as a business and expenses are deducted, but the CRA disagrees? The CRA can disallow those deductions if it determines the activity doesn't reflect a genuine commercial operation, which can result in additional tax owing plus possible interest on the reassessment.

Follow the system. File with confidence.