A small business vehicle write off in Canada can cut thousands from your tax bill each year, but the rules differ depending on whether you own, lease, or finance the vehicle — and whether you operate as a sole proprietor or through a corporation. This hub guide walks through every deduction method, the 2026 CRA limits, CCA classes, and the records you need to keep your claim audit-proof.
Two Deduction Methods: Per-Kilometre vs. Actual Expenses
The CRA gives small business owners two paths for writing off vehicle costs.
Per-kilometre method. Multiply your business kilometres by the CRA allowance rate: $0.73/km for the first 5,000 km and $0.67/km for each additional kilometre in 2026 (provincial rates). This method requires a mileage log but no individual expense receipts. It works well when operating costs are low or when you want simplicity.
Actual-expense method. Track every vehicle cost — fuel, insurance, maintenance, registration, lease payments, or loan interest — then multiply the total by your business-use percentage. Add CCA (depreciation) if you own the vehicle. For vehicles costing $40,000 or more, or with high annual operating costs, this method almost always produces a larger deduction.
Most small business owners who drive frequently will save more with the actual-expense method. The rest of this guide focuses on how to maximize that approach. For a full breakdown of the 2026 per-km and expense caps, see automobile deduction limits 2026 Canada.
Actual-Expense Write-Off: Step by Step
Here is the five-step process for calculating your small business vehicle write off using actual expenses.
Step 1 — Calculate your business-use percentage. Divide business kilometres by total kilometres for the year. A CRA-compliant mileage log is mandatory to support this ratio. Tripbook builds this log automatically by recording every trip with GPS, so your business-use percentage is always accurate and defensible at audit time.
Step 2 — Total your eligible operating expenses. The CRA allows the following costs (2026 caps in parentheses):
- Fuel and oil — no cap
- Insurance premiums — no cap
- Maintenance and repairs — no cap
- Licence and registration fees — no cap
- Lease payments — capped at $1,100/month before GST/HST
- Loan interest — capped at $350/month
Step 3 — Apply business-use percentage to operating expenses. Total eligible expenses multiplied by business-use percentage equals your deductible operating costs.
Step 4 — Calculate CCA on an owned vehicle. Determine the correct CCA class (see below), apply the rate and half-year rule, then multiply by business-use percentage.
Step 5 — Sum the two components. Total write-off = deductible operating costs (Step 3) + CCA deduction (Step 4).
CCA Classes: 10, 10.1, and 54
If you own or finance your business vehicle, capital cost allowance is the mechanism for depreciating its purchase price. The CRA assigns every vehicle to one of three classes, each with different rules.
Class 10 covers motor vehicles — pickups, vans, and passenger vehicles costing $39,000 or less before tax. The CCA rate is 30% on a declining balance. Multiple Class 10 vehicles are pooled into a single class, and there is no cost ceiling.
Class 10.1 applies to passenger vehicles costing more than $39,000 before tax. The rate is still 30%, but the depreciable amount is capped at $39,000 regardless of what you paid. Each Class 10.1 vehicle sits in its own separate class — no pooling. There is no terminal loss or recapture on disposal.
Class 54 is for zero-emission vehicles (battery-electric, hydrogen fuel-cell, qualifying plug-in hybrids). The cost ceiling is $61,000 before tax. For vehicles acquired in 2026 or 2027, the enhanced first-year CCA rate is effectively 55% — nearly double the Class 10/10.1 rate. The half-year rule does not apply to Class 54.
For a deeper dive into each class, depreciation schedules, and the Accelerated Investment Incentive, see capital cost allowance vehicle Canada.
Worked Example: $52,000 Sedan at 80% Business Use
Priya runs a consulting firm in Calgary and purchases a $52,000 sedan in January 2026. She drives 25,000 km during the year, of which 20,000 km are client visits and business travel — an 80% business-use ratio. Her annual vehicle operating costs total $12,600.
Operating-expense deduction: $12,600 total costs x 80% business use = $10,080
CCA deduction (Class 10.1): The vehicle exceeds $39,000, so it enters Class 10.1 with a capped depreciable cost of $39,000. Applying the half-year rule in year one: $39,000 x 30% x 50% = $5,850 gross CCA $5,850 x 80% business use = $4,680
Total Year 1 small business vehicle write off: $10,080 + $4,680 = $14,760
In Year 2, the undepreciated capital cost drops to $33,150. CCA rises to $33,150 x 30% = $9,945, and the business portion is $9,945 x 80% = $7,956. Assuming stable operating costs, the Year 2 total reaches $10,080 + $7,956 = $18,036.
Had Priya chosen a $52,000 electric vehicle instead, Class 54 would apply with a $52,000 depreciable cost (under the $61,000 ceiling), a 55% first-year rate, and no half-year rule — producing a Year 1 CCA of $52,000 x 55% x 80% = $22,880 before operating expenses.
Lease vs. Buy: Which Write-Off Is Larger?
If you lease rather than buy, the deduction structure changes:
- Monthly lease payments are deductible up to $1,100/month before GST/HST, multiplied by your business-use percentage.
- No CCA applies — the lessor owns the vehicle.
- The deduction is consistent each year, making cash-flow planning simpler.
At 80% business use and the $1,100/month cap: $1,100 x 12 x 80% = $10,560/year in lease deductions, plus operating expenses (fuel, insurance, maintenance) at the same 80% ratio.
For a side-by-side comparison including financing, see buy vs lease vs finance car business Canada.
Sole Proprietor vs. Incorporated: Key Differences
How you structure your business changes how vehicle expenses flow through your tax return.
Sole proprietors and partnerships claim vehicle expenses directly on Form T2125 (Statement of Business or Professional Activities), which feeds into the personal T1 return. The business-use percentage applies to every expense line. This is straightforward — one form, one return.
Incorporated businesses have three options. First, the corporation can own or lease the vehicle and deduct expenses on the T2 corporate return; however, any personal use triggers a taxable standby charge and operating-cost benefit on the shareholder-employee’s T4. Second, the owner can keep the vehicle personally and have the corporation reimburse at the CRA per-km rate ($0.73/$0.67) — the reimbursement is deductible to the corporation and tax-free to the owner. Third, the owner can claim expenses personally if a T2200 is on file, though this is less common for owner-managers.
The per-km reimbursement method is often the simplest for incorporated owners with moderate business mileage. Corporate ownership tends to produce larger deductions when business use exceeds 75% and operating costs are high — but the standby charge can erode the benefit if personal use is significant.
Regardless of structure, the foundation is always a CRA-compliant mileage log. For a detailed walkthrough of the T2125 form, see self-employed vehicle expenses Canada.
Record Keeping That Survives a CRA Audit
The CRA will disallow your entire vehicle deduction if you cannot produce supporting documents. At minimum, you need:
- Mileage logbook — date, destination, business purpose, and odometer readings for every trip. This is the single most important record.
- Expense receipts — fuel, insurance, maintenance, registration, parking, tolls.
- CCA schedule — undepreciated capital cost carried forward from prior years.
- Lease or loan documents — monthly payment amounts and terms.
Keep all records for at least six years from the date of your return. Tripbook captures your mileage log automatically with GPS tracking, categorizes trips as business or personal, and generates a CRA-ready report — eliminating the most common audit vulnerability.
Start Claiming Your Vehicle Write-Off
Every business kilometre you drive is a deduction waiting to be claimed. At a combined 40% marginal tax rate, a $14,760 vehicle write-off saves roughly $5,900 in tax — and that number grows in Year 2. The small business vehicle write off in Canada is one of the largest deductions available, but only if your records support it.
Download Tripbook to build the mileage log that powers every vehicle deduction method described above.
