Tax planning for self-employed Canadians in 2026
Being your own employer has real tax advantages — business expense deductions, the ability to time income and expenses, and RRSP contributions made from self-employment income. The 2026 RRSP dollar limit of $33,810 is built on 18% of prior-year earned income, and self-employment income counts as earned income.
It also comes with obligations employees don't face: quarterly instalments, CPP at double the employee rate, GST/HST registration and remittance, and a larger-than-expected April bill for anyone who hasn't set money aside throughout the year. Plan now — corrections are expensive.
On this page
Calculate your 2026 quarterly instalments using the prior-year method.
Check your 2025 Notice of Assessment or line 43500 of your 2025 T1 return.
Quebec uses a lower instalment threshold ($1,800 vs. $3,000).
Instalments not required based on prior-year tax.
Your prior-year net tax ($0) is at or below the $3,000 threshold. However, if your 2026 income is significantly higher, you may owe a large balance in April. Consider voluntary instalments to spread the cost.
Quarterly tax instalments
Instalments are required when net tax owing exceeds $3,000 (or $1,800 in Quebec) in the current year AND in at least one of the two prior years. CRA sends instalment reminders in February and August — receiving one means you likely must pay.
Prior-year method: pay 25% of last year's net tax each quarter. Safe — no interest if you pay the exact amount CRA calculates. Current-year method: estimate current-year tax and pay in four equal instalments — useful if income dropped significantly but creates interest risk if underestimated.
Due dates: March 15, June 15, September 15, December 15. Interest on underpaid instalments is charged from the due date, not from April 30. If cumulative interest exceeds $1,000, CRA adds a 50% excess-interest surcharge.
Self-employed CPP
Self-employed individuals pay both the employee and employer portions of CPP:
- CPP1: 5.95% + 5.95% = 11.9% on net self-employment income between $3,500 and $74,600 (YMPE). Maximum contribution: approximately $8,461.
- CPP2: 4% + 4% = 8% on income between $74,600 and $85,000. Maximum: approximately $832.
Total maximum CPP for self-employed individuals at maximum 2026 earnings: approximately $9,293 — before income tax.
The employer half of CPP1 (not CPP2) is deductible on line 22200 — it reduces taxable income, not just provides a credit. The employee half of CPP1 generates a 15% non-refundable credit like it does for employees.
GST/HST registration and remittance
GST/HST registration is mandatory once you exceed $30,000 in taxable revenues in any four consecutive calendar quarters. Below that threshold you are a "small supplier" — registration is optional.
Voluntary registration before $30,000 lets you claim Input Tax Credits (ITCs) to recover GST/HST paid on business expenses — worthwhile if you have significant up-front costs.
Filing frequency options: annual (under $1.5M in revenues), quarterly, or monthly. Quebec businesses must also register for QST (9.975%) separately with Revenu Québec.
Deductible business expenses
| Expense | Key rule |
|---|---|
| Home office | Detailed method: actual costs × business-use %; proportion of home used exclusively for business |
| Vehicle | Business km ÷ total km; logbook is mandatory — CRA will not accept estimates |
| Meals and entertainment | 50% of eligible meals with a business purpose |
| Professional development | Courses, books, conferences directly related to your business |
| Software and subscriptions | Deductible if used for business; CCA Class 12 for software licenses |
| Equipment and tools | Capital Cost Allowance (CCA) — deducted over multiple years, not fully in year of purchase |
| Health insurance premiums | Self-employed can deduct eligible health/dental premiums as a business expense |
| Professional fees | Accounting, legal, business consulting |
| Advertising and marketing | Business website, digital ads, printed materials |
Home office deduction
Business-use percentage = business space area ÷ total home area. Eligible expenses: heat, electricity, water, internet, rent, and maintenance of the business area.
Mortgage principal is not deductible. Mortgage interest and property taxes are, at the business-use percentage.
The home office deduction cannot create or increase a business loss — it can reduce business income to zero but not below. Unused home-office amounts carry forward to future years.
You must use the space either principally for business (more than 50% of your working time) or exclusively for business and regularly for meeting clients. If you also have a rented office, the home office deduction is more difficult to defend unless you spend the majority of your working time there.
Vehicle deduction
A contemporaneous logbook is mandatory. Record for each business trip: date, destination, business purpose, and kilometres. At year-end, total business km ÷ total km = deductible percentage.
The deductible percentage applies to both operating costs (fuel, insurance, maintenance) and CCA on the vehicle purchase price. The vehicle cost eligible for CCA is capped at a prescribed amount (verify the 2026 passenger vehicle cost limit at canada.ca).
For leased vehicles: monthly deductible lease payments are also capped at a prescribed limit — verify the 2026 limit.
Year-end income and expense timing
Cash-basis self-employed individuals have more timing flexibility than employees:
- Defer December invoices to January if your income is unusually high this year — defers the tax one year.
- Accelerate deductible purchases before December 31: prepaid software, equipment purchases, advertising commitments.
- RRSP contributions (with the March 2027 deadline) reduce net self-employment income dollar-for-dollar — one of the most efficient tax-reduction tools for high-income self-employed individuals.
Incorporation decision: whether to incorporate depends on income level, need to retain earnings in the business, and tolerance for additional compliance. Corporate tax rates (approximately 9–12% on the first $500,000 of active business income) can be dramatically lower than personal top marginal rates — but the savings only matter if you can leave money inside the corporation. This page does not cover corporate tax. Consult a CPA before incorporating.
Common mistakes
Mistake
Not setting aside money for CPP throughout the year
Self-employed CPP at double the employee rate frequently arrives as a shock in April. Rough rule: set aside 30–35% of net self-employment income throughout the year to cover income tax and CPP together.
Mistake
Skipping quarterly instalments in year one ("I'll pay it all in April")
Interest on underpaid instalments compounds daily from the due date. If cumulative underpayment interest exceeds $1,000, CRA also charges a 50% excess-interest surcharge — making large instalment gaps very expensive.
Mistake
No vehicle logbook
"I drive mostly for business" is not a substitute for records. CRA requires contemporaneous logs — date, destination, purpose, and km for each business trip. A reconstructed logbook is difficult to defend.
Quick wins
Quick win
Open a dedicated business bank account and card on day one
Mixing personal and business transactions creates a costly reconstruction problem. A dedicated account creates a natural paper trail and makes expense tracking dramatically easier.
Quick win
Automate quarterly instalment payments via CRA My Business Account
Schedule all four due dates in January and let them run automatically. Missing even one by a week triggers daily compound interest.
Quick win
The employer half of CPP1 is deductible from income
Self-employed individuals can deduct the employer portion of CPP1 contributions on line 22200 of the T1 — up to $4,230 at maximum 2026 earnings. It reduces taxable income dollar-for-dollar, not just as a credit.
FAQ's
When do I have to start paying quarterly instalments?
You must pay quarterly instalments when your net tax owing exceeds $3,000 (or $1,800 in Quebec) in both the current year AND in at least one of the two prior years. CRA sends instalment reminders in February and August — if you receive these, you are likely required to pay. For most first-year self-employed individuals, instalments begin in the second year, because the prior year was an employment year with no instalment obligation. The four due dates are March 15, June 15, September 15, and December 15.How much CPP do I pay as a self-employed person?
Self-employed individuals pay both the employee and employer portions of CPP. For CPP1 in 2026, that is 5.95% + 5.95% = 11.9% on net self-employment income between $3,500 and $74,600 — a maximum of approximately $8,461. For CPP2 (on the second earnings ceiling between $74,600 and $85,000), the rate is 4% + 4% = 8% — a maximum of approximately $832. Total maximum CPP contributions for self-employed individuals at maximum earnings is roughly $9,293 in 2026. The employer half of CPP1 (but not CPP2) is deductible as a business expense. This is frequently the largest financial surprise for newly self-employed Canadians.Do I have to register for GST/HST right away when I start a business?
No — the mandatory registration threshold is $30,000 in taxable revenues in any four consecutive calendar quarters. Below that, you are a "small supplier" and registration is optional. However, voluntary registration can make sense even before the threshold if your business incurs significant GST/HST-eligible expenses — registering lets you claim Input Tax Credits (ITCs) to recover GST/HST paid on business costs. Once you cross the $30,000 threshold, registration is required within 29 days, and you must begin collecting and remitting GST/HST from that point. Quebec businesses must also register for QST separately with Revenu Québec.Can I deduct my home office if I also have another office?
Yes — but only if the home office is where you principally carry on your business, or if it is used exclusively for business and on a regular and continuous basis for meeting clients or customers. "Principally" generally means more than 50% of your working time. If you split your time fairly evenly between a rented office and your home, the home office deduction is unlikely to pass CRA's test. Document your situation carefully — the T2200 (for employees) or T2125 (for self-employed) requires you to certify eligibility. The deduction is proportional to the business-use area, not all-or-nothing.What records do I need to keep for a vehicle deduction?
CRA requires a logbook for vehicle deductions — estimates are not acceptable. For each business trip, record: date, destination, business purpose, and kilometres driven. At year-end, calculate total business kilometres and total kilometres driven; the ratio is your deductible percentage. You must also keep all receipts for operating costs: fuel, oil changes, insurance, repairs, registration. For a vehicle you own and use for CCA (depreciation), keep the original purchase documents. CRA can audit vehicle claims for up to 6 years — a contemporaneous logbook (written at the time of each trip) is far more defensible than a reconstructed one.