The side hustle tax calculator estimates taxes on self-employment income in Canada. Enter your employment income, side hustle revenue, and deductible expenses to see the incremental tax impact, CPP self-employment contributions, and after-tax side hustle income.
How this calculator works
Enter your regular employment income, your side hustle gross revenue, deductible business expenses, your province, and whether you are registered for GST/HST. The calculator shows the federal and provincial tax specifically on the side income, self-employed CPP contributions, and your true after-tax side hustle income.
Note: Self-employed individuals pay both the employee and employer portions of CPP (11.9% combined in 2025). You may need to pay tax by instalments if you owe more than $3,000 at tax time.
Understanding self-employment taxes in Canada
Self-employment income is taxed differently from employment income in three key ways:
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You pay both portions of CPP — Employees split CPP with their employer (5.95% each). Self-employed individuals pay both halves: 11.9% total on net earnings between $3,500 and $71,300.
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No EI is required — Self-employed workers are not required to pay EI premiums (though you can opt in for special benefits like maternity/parental leave).
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No tax is withheld at source — Unlike employment, no one deducts tax from your side hustle earnings. You are responsible for setting aside tax and potentially paying quarterly instalments.
Tax rates on side hustle income by province (2026)
Since side income is taxed at your marginal rate (stacking on top of employment income), the effective rate depends on your total income:
| Employment Income | Combined Marginal Rate (ON) | Effective Rate on Side Income |
|---|---|---|
| $50,000 | 29.65% + 11.9% CPP | ~41.5% |
| $75,000 | 31.48% + 11.9% CPP | ~43.4% |
| $100,000 | 33.89% + 4% CPP2 | ~37.9% |
| $130,000 | 43.41% + 0% CPP | ~43.4% |
| $170,000 | 46.41% + 0% CPP | ~46.4% |
Note: Half of CPP self-employed contributions are deductible, which slightly reduces the effective rate.
Common deductible expenses
Home office
Deduct the proportional cost of your home used for business:
- Rent or mortgage interest (not principal)
- Utilities (heat, electricity, water)
- Home insurance
- Property tax
- Internet (business portion)
Formula: Business-use area ÷ Total home area × Annual costs
Vehicle
If you use your vehicle for business:
- Gas and maintenance (business km ÷ total km)
- Insurance (proportional)
- Lease payments or CCA on purchased vehicles
- Parking and tolls (business trips)
Keep a mileage log — the CRA frequently audits vehicle expense claims.
Other common deductions
- Software and subscriptions (tools used for the business)
- Professional development and courses
- Advertising and website costs
- Office supplies and equipment
- Professional fees (bookkeeper, accountant)
- Business insurance
GST/HST obligations
| Annual Revenue | GST/HST Obligation |
|---|---|
| Under $30,000 | Optional (small supplier exemption) |
| Over $30,000 | Must register and charge GST/HST |
Once registered, you can claim Input Tax Credits (ITCs) to recoup GST/HST paid on business expenses. Depending on your expense ratio, ITCs can significantly reduce your net GST/HST remittance.
Quick Method: If your side hustle is service-based, the Quick Method simplifies GST/HST remittance and often results in paying less (you remit a lower percentage of revenue and keep the difference).
Tax-saving strategies for side hustles
- Maximize deductions — Track every legitimate expense
- Contribute to an RRSP — Self-employment income adds RRSP contribution room
- Open a separate business bank account — Simplifies record-keeping
- Set aside 30-40% of side hustle revenue for taxes and CPP
- Consider incorporation if net income consistently exceeds $80,000+
- Hire family members where reasonable to split income (adult children, spouse)
- Time expenses strategically — Accelerate expenses into the current year if tax rate is high
Related calculators
- Income Tax Calculator — Full tax calculation including self-employment
- Marginal Tax Rate Calculator — Find your combined marginal rate
- GST/HST Calculator — Calculate your GST/HST remittance
- CPP Calculator — Estimate your CPP contributions and benefits
- RRSP Calculator — Use side income RRSP room for tax savings
- Salary Calculator — Compare employment vs self-employment take-home