Side Hustle Tax Guide Canada 2025

Everything you need to know about reporting side hustle income, claiming deductions, and staying on the right side of the CRA.

How the CRA Classifies Side Hustle Income

The Canada Revenue Agency classifies most side hustle income as business income — not employment income. This distinction matters enormously. Business income is reported on Form T2125 (Statement of Business or Professional Activities) and attached to your T1 personal return. Unlike employment income, you are responsible for paying your own taxes; nothing is withheld at source.

For income to qualify as business income (versus a hobby), the CRA looks for a reasonable expectation of profit. If you consistently earn money, market your services, and operate in a business-like manner, the CRA will generally treat it as a business. Hobby losses cannot be used to offset other income, so it is usually advantageous to operate as a business.

Your T1 Filing Deadlines as a Self-Employed Canadian

Self-employed Canadians (and their spouses) have until June 15 to file their T1 return — two months later than the April 30 deadline for employed individuals. However, any taxes owing are still due by April 30. If you miss the April 30 payment deadline, interest begins accruing on the balance owing at the prescribed CRA rate. File on time to avoid late-filing penalties, which start at 5% of the balance owing plus 1% per month for up to 12 months.

Completing Form T2125: Step by Step

Form T2125 is the core tax document for self-employed Canadians. You will need to report: your total gross business income (all revenue before expenses), then subtract allowable business expenses to arrive at your net business income. Net business income is added to your other income sources for the year and taxed at your marginal rate.

• Part 1: Business identification (name, address, industry code, GST/HST number if applicable)
• Part 2: Business income — total revenue from all clients, platforms, and customers
• Part 3: Cost of goods sold (if you sell physical products)
• Part 4: Business expenses — detailed breakdown by category
• Part 6: Business-use-of-home expenses (if applicable)
• Part 7: Motor vehicle expenses (if claiming vehicle costs)

Deductible Business Expenses You Can Claim

Expense Category	Deductible Portion	Notes
Home office (rent/mortgage interest/utilities)	Business % of home	Must be used regularly and exclusively for business
Vehicle expenses	Business km / total km	Keep a mileage logbook
Meals and entertainment	50%	Must be business-related
Phone and internet	Business-use %	Reasonable estimate required
Software subscriptions	100%	Business use only
Professional development	100%	Must be relevant to your business
Office supplies	100%	Keep all receipts
Advertising/marketing	100%	Website, ads, business cards
Professional fees (accountant, lawyer)	100%	For business purposes

GST/HST: The $30,000 Threshold Rule

One of the most misunderstood obligations for side hustlers is GST/HST. You must register for a GST/HST number once your worldwide taxable supplies (basically, your total self-employment revenue) exceed $30,000 in any single calendar quarter OR over four consecutive calendar quarters. The clock starts from the moment you first start earning side income.

Once registered, you add GST/HST to your invoices (5% in most provinces; up to 15% in HST provinces like Ontario at 13%, Nova Scotia at 15%). You remit collected amounts to the CRA, usually quarterly, and can reclaim GST/HST paid on business expenses through Input Tax Credits.

CPP on Self-Employment Income

This is the tax that surprises most new side hustlers. As a self-employed Canadian, you pay both the employee and employer CPP contributions — effectively double. In 2025, the combined rate is 11.9% on net self-employment income up to the maximum pensionable earnings ($68,500 in 2025). The maximum annual contribution is approximately $8,150. The employee half is a non-refundable tax credit; the employer half is a deduction from business income. Plan for this in your quarterly tax savings.

Installment Payments: Avoid Surprise Tax Bills

If you expect to owe more than $3,000 in taxes in the current year AND in either of the two preceding years, the CRA may require you to make quarterly installment payments. These are due March 15, June 15, September 15, and December 15. The CRA will send you an installment reminder notice if this applies. Even if not required, making voluntary installments is smart financial planning — it prevents a large lump-sum payment at tax time.