Self-employed Canadians pay federal and provincial income tax on net business income (gross revenue minus allowable business expenses), plus both the employee and employer portions of CPP contributions. Unlike employees, no income tax is withheld at source — self-employed individuals must make quarterly instalment payments if net tax owing exceeds $3,000 ($1,800 in Quebec) in both the current year and either prior year.
Quick Answer
A self-employed sole proprietor in Ontario with $80,000 net business income in 2026 owes approximately $13,000 in combined federal and provincial income tax (after the basic personal amount and CPP credits) plus $8,892.90 in CPP contributions (CPP1 plus CPP2 self-employed maximum at this income level), totalling roughly $21,800 in combined obligations. The CPP and half the income tax can be reduced by RRSP contributions, the home office deduction, and other business deductions.
How Self-Employment Tax Is Calculated
Step 1 — Net business income: Gross revenue minus allowable business expenses (advertising, professional fees, vehicle expenses, home office, supplies, travel, etc.) = net income from business (line 13500 of T1).
Step 2 — CPP contributions: Both employee and employer share. CPP1: 11.9% of net business income above $3,500, capped at YMPE of $74,600 (max $8,460.90). CPP2: 8% on income between $74,600 and YAMPE of $85,000 (max $832).
Step 3 — Income tax: Net business income (after deducting 50% of CPP and any other above-the-line deductions) is subject to federal and provincial income tax at standard bracket rates. The 2026 federal lowest bracket is 14% on the first $58,523 of taxable income.
Step 4 — CPP deduction and credit: 50% of CPP contributions is deducted as a business expense (line 22200); the other 50% generates a non-refundable tax credit at the lowest federal rate of 14% (Schedule 8).
2026 Combined Self-Employment Obligations (Ontario, $80,000 Net Income)
| Item |
Amount |
| Net business income |
$80,000 |
| CPP1 (11.9% of $71,100) |
$8,460.90 |
| CPP2 (8% of $5,400) |
$432.00 |
| Total CPP + CPP2 |
$8,892.90 |
| CPP deduction (50% x $8,892.90) |
-$4,446.45 |
| Net taxable income (federal and Ontario) |
~$75,553.55 |
| Federal income tax (after BPA + CPP credit) |
~$8,800 |
| Ontario income tax (after BPA + Ontario health premium) |
~$4,200 |
| Total combined tax + CPP |
~$21,800 |
2026 CPP Self-Employed Limits
| Parameter |
2026 Value |
| YMPE (Yearly Maximum Pensionable Earnings) |
$74,600 |
| YAMPE (Additional Yearly Maximum Pensionable Earnings) |
$85,000 |
| Basic exemption |
$3,500 |
| CPP1 contribution rate (self-employed) |
11.90% |
| CPP2 contribution rate (self-employed) |
8.00% |
| Maximum CPP1 contribution |
$8,460.90 |
| Maximum CPP2 contribution |
$832.00 |
| Combined maximum contribution |
$9,292.90 |
Quarterly Instalment Payments
CRA requires quarterly instalments (March 15, June 15, September 15, December 15) when net tax owing exceeds $3,000 in both the current and prior year. Instalments can be calculated three ways: prior-year basis, current-year estimate, or no-calculation method (CRA sends a payment notice). Failing to make timely instalments results in instalment interest and possible penalties.
Verified Against Source
Self-employment tax obligations are governed by ITA Part I (income tax), the Canada Pension Plan Act (CPP), and ITA section 163.1 (instalment penalties). Schedule 8 computes CPP for self-employed. Source: canada.ca/en/revenue-agency/services/tax/businesses/topics/sole-proprietorships-partnerships/report-business-income-expenses.html
Frequently asked questions
- How is self-employment tax calculated in Canada?
- Self-employed Canadians pay: (1) federal and provincial income tax on net business income (gross revenue minus allowable expenses) at standard marginal rates; and (2) both the employee and employer CPP contributions — 11.9% of net business income above $3,500, up to the YMPE ($71,300 in 2025, max $8,068). No income tax is withheld at source.
Do self-employed people pay more CPP than employees?
Yes. Self-employed individuals pay both the employee and employer CPP portions: 11.9% combined versus the employee-only 5.95%. The maximum self-employed CPP is $8,068 in 2025 (employee maximum: $4,034). However, 50% of the self-employed CPP is deductible as a business expense on line 22200, and the other 50% generates a 15% non-refundable tax credit.
Can I deduct business expenses from self-employment income?
Yes. Allowable business expenses reduce net business income: advertising, meals and entertainment (50%), professional fees (accounting, legal), vehicle expenses (business portion), home office expenses, supplies, travel, phone and internet (business portion), wages paid to employees or subcontractors, and depreciation (CCA) on business assets. Personal expenses are not deductible.
When must self-employed individuals pay taxes?
Tax owing is due April 30 even if self-employed (filing deadline June 15 for self-employed and spouses). Quarterly instalments are required if net tax owing exceeds $3,000 ($1,800 in Quebec) in the current year AND either of the two prior years. Instalment due dates: March 15, June 15, September 15, December 15.
What is the self-employed filing deadline in Canada?
Self-employed individuals and their spouses or common-law partners have until June 15 to file their T1 returns. However, any balance owing is still due April 30. Filing late when you owe triggers late-filing penalties (5% of balance plus 1% per month). The June 15 extension is a filing extension only, not a payment extension.
Can I claim an RRSP deduction as a self-employed person?
Yes. RRSP room is earned from net self-employment income at 18% of prior-year earned income (up to $33,810 in 2026). Making RRSP contributions reduces taxable income and lowers the income tax portion of the self-employment tax bill. The RRSP deduction does not reduce CPP contributions — CPP is calculated on net business income before RRSP deductions.
Do self-employed people have to register for GST/HST?
Yes, if annual taxable supplies exceed $30,000 in a calendar year or in four consecutive quarters. Below $30,000, registration is optional (voluntary registration has advantages for input tax credits). Once over $30,000, registration is mandatory within 29 days and quarterly or annual GST/HST returns must be filed.
What is the home office deduction for self-employed?
Self-employed individuals can claim home office expenses on Form T2125 if the home is their principal place of business or is used exclusively for meeting clients. Unlike employees, self-employed can claim mortgage interest, property taxes, and capital cost allowance (CCA) on the business portion — though claiming CCA reduces the principal residence exemption.
What business structure reduces self-employment tax most?
Incorporating as a CCPC can reduce tax in some circumstances by: deferring tax on retained income taxed at the small business rate (~12% vs personal marginal rates up to 53%); splitting income with a spouse through dividends; and gaining access to the lifetime capital gains exemption on QSBC shares. However, incorporation has setup and compliance costs and is not always beneficial at lower income levels.
What is the small business deduction for a self-employed incorporated business?
The small business deduction (SBD) applies to Canadian-controlled private corporations (CCPCs) — not to sole proprietors. The SBD reduces the corporate tax rate to approximately 9-12.5% on active business income up to $500,000 per associated group. Sole proprietors pay personal marginal rates (up to 53%) on net business income. Incorporation is required to access the SBD.
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