Unlike some countries, Canada has no minimum earnings threshold before self-employment income becomes taxable. If you intend to make a profit, CRA considers it a business - even if you earn $100.

CRA looks at several factors: frequency of sales, intention to profit, how organized your activity is, and whether you market it. Selling a used couch is not a business. Selling handmade furniture regularly on Etsy is.

The key word is "intention to profit." If you run an activity with no reasonable expectation of profit (a hobby), you cannot claim losses. But if you intend to profit, you must report all income.

Open a separate chequing account for your side hustle immediately. Never mix business and personal money. This makes bookkeeping simple and protects you in an audit.

Keep every receipt related to your business - digital photos are fine. CRA requires you to keep records for 6 years after the tax year they relate to.

Use a simple spreadsheet or free software like Wave Accounting to track income and expenses monthly. Doing this from the start saves hours of painful reconstruction at tax time.

CRA looks at four key indicators to decide if your activity is a business: frequency of transactions, the way you organize the activity, your marketing and advertising, and whether you keep proper books and records.

A single sale on Kijiji is not a business. Listing five to ten items per week on Etsy with branded packaging and a logo is. The line is fuzzy in the middle, but consistency over time tilts CRA's view toward "business."

If you operate like a business - website, business cards, advertising, structured pricing - you cannot later claim it was just a hobby to avoid taxes. CRA looks at the totality of your behaviour, not your label.

Most side-hustle income does not come with a T4 or T4A. Your customers pay you directly via e-Transfer, PayPal, or cash. You are still legally required to report every dollar on your tax return through form T2125 (Statement of Business Activities).

CRA increasingly cross-references payment processors. PayPal, Stripe, Square, Etsy, Uber, DoorDash, and many others issue T4As or report directly to CRA at year-end. The data CRA receives often surprises taxpayers who thought small payments were invisible.

Unreported business income carries penalties of 50% of the tax owed plus interest. If CRA finds the same omission twice (gross negligence), penalties can double. Just report it - the tax bill is much smaller than the penalties.