If you drive for work in Canada, the mileage rate vs actual expenses CRA question comes up every tax season. The answer depends on whether you are self-employed or an employee, because the CRA treats these two groups differently. Self-employed individuals must use the actual expense method on Form T2125, while employees may receive a tax-free per-kilometre allowance from their employer or claim actual expenses on Form T777. This guide walks through both methods with 2026 numbers, a side-by-side calculation, and a clear framework for deciding which approach saves more.
How the Per-Kilometre Rate Works
The CRA publishes prescribed automobile allowance rates each January. For the 2026 tax year, the rates are:
- $0.73 per km for the first 5,000 business kilometres
- $0.67 per km for each additional business kilometre
- An extra $0.04 per km in the Yukon, Northwest Territories, and Nunavut
These rates are designed to cover all vehicle operating costs in a single figure — fuel, insurance, maintenance, depreciation, and financing. When a per-km allowance is paid at or near these rates, no individual expense receipts are needed.
Who can use the per-km rate: Employees who receive an automobile allowance from their employer. If the allowance is based solely on the number of business kilometres driven and falls within the CRA’s reasonable range, it is tax-free and does not appear as income on the employee’s T4 slip.
Who cannot use the per-km rate: Self-employed individuals, sole proprietors, and freelancers. The CRA does not allow self-employed filers to claim a flat per-kilometre deduction. There is no employer-employee relationship, so the prescribed rates do not apply. Instead, self-employed filers must track and deduct actual vehicle expenses on Form T2125.
How the Actual Expense Method Works
The actual expense method calculates your real vehicle costs and applies a business-use percentage:
- Total your vehicle expenses for the year: fuel, oil, insurance, maintenance, repairs, licence and registration, parking, lease payments (capped at $1,100/month before tax in 2026), loan interest (capped at $350/month), or CCA if you own the vehicle
- Calculate your business-use percentage: divide total business kilometres by total kilometres driven
- Multiply total expenses by business-use percentage
- The result is your deduction
Required records: A mileage logbook tracking every business trip (date, destination, purpose, distance) plus receipts for all vehicle expenses. Tripbook generates the annual mileage summary and business-use percentage you need for this calculation — the two key inputs the CRA requires.
Who must use this method: All self-employed individuals, sole proprietors, partnerships, and incorporated business owners claiming vehicle expenses. Employees who received an unreasonable allowance (too high, too low, or a flat monthly amount regardless of kilometres) can also use this method on Form T777, provided they have a signed T2200 from their employer.
Side-by-Side Calculation: Per-KM vs Actual
Consider two scenarios using 2026 rates to see when each method produces a larger deduction.
Scenario A — Low-cost vehicle, 15,000 business km Total vehicle costs: $8,500/year. Total km driven: 20,000. Business-use: 75%.
| Method | Calculation | Deduction |
|---|---|---|
| Per-km rate | 5,000 × $0.73 + 10,000 × $0.67 | $10,350 |
| Actual expenses | $8,500 × 75% | $6,375 |
The per-km rate wins by $3,975 because real costs per kilometre ($0.43) fall well below the CRA’s prescribed rates.
Scenario B — Expensive vehicle, 25,000 business km Total vehicle costs: $24,000/year (lease, insurance, fuel, repairs). Total km driven: 30,000. Business-use: 83%.
| Method | Calculation | Deduction |
|---|---|---|
| Per-km rate | 5,000 × $0.73 + 20,000 × $0.67 | $17,050 |
| Actual expenses | $24,000 × 83% | $19,920 |
Actual expenses win by $2,870 because the vehicle’s real cost per kilometre ($0.80) exceeds the CRA rates.
When Actual Expenses Save More Money
The actual expense method tends to produce a larger deduction in these situations:
High vehicle operating costs. Leasing a premium vehicle, carrying expensive insurance, or paying for significant repairs pushes your real cost above the CRA’s per-km rates. If your all-in cost exceeds roughly $0.67 per kilometre for the bulk of your driving, actual expenses likely wins.
Capital cost allowance in Year 1. Owned vehicles qualify for CCA, and Year 1 can be substantial. A $55,000 zero-emission vehicle in Class 54 at 55% (with the half-year rule) generates $15,125 in CCA before the business-use percentage is applied. This front-loaded depreciation often tips the balance toward the actual method in the first two years of ownership.
High total kilometres with moderate business use. When you rack up significant total mileage and have high fixed costs (insurance, lease, registration), the actual method captures a larger share of those fixed costs than the per-km rate would produce.
Self-employed filers. This is not optional — the CRA requires self-employed individuals to use the actual expense method. The per-km rate comparison is relevant only for understanding whether an employee’s allowance is generous or whether you should negotiate for a higher rate with a client.
When the Per-KM Rate Is Simpler and Sufficient
The per-km rate works well for employees in these circumstances:
Low-cost, fuel-efficient vehicle. If your car costs $0.35 to $0.50 per kilometre to operate, the CRA’s $0.73/$0.67 rates more than cover your costs. You receive a larger benefit from the flat rate than you would from tracking receipts.
Employer pays a reasonable allowance. When your employer reimburses at or near the CRA rate, the allowance is tax-free. There is no deduction to claim because you have already been made whole. This is the simplest outcome — no T777 filing, no receipt tracking, just a mileage log.
Low overall expenses. If you drive a paid-off vehicle with minimal maintenance, the per-km rate almost always exceeds your real costs. Tracking every fuel receipt and insurance bill would produce a smaller number.
The key test is straightforward: if your employer’s per-km allowance covers your real costs, accept it and move on. If it falls short, ask your employer to increase the rate or file T777 with actual expenses instead.
Mileage Rate vs Actual Expenses CRA — Your 2026 Action Plan
You can calculate the exact breakeven point where the two methods produce the same deduction:
- For the first 5,000 business km: actual method wins if your real cost per km exceeds $0.73
- For every km beyond 5,000: actual method wins if your real cost per km exceeds $0.67
Quick formula: Divide your total annual vehicle expenses by total kilometres driven. If the result is above $0.67, actual expenses likely produces the larger deduction. If it is below $0.67, the per-km rate is more favourable. For most Canadians driving a mid-range vehicle, the breakeven falls between $14,000 and $18,000 in annual vehicle costs for 25,000 total km. Running both calculations at year-end takes about ten minutes with Tripbook’s annual mileage report and could save $1,000 to $4,000.
If you are self-employed: You must use the actual expense method. Track every vehicle expense throughout the year and maintain a CRA-compliant mileage logbook. Report vehicle expenses on Form T2125. Consider using Tripbook to automate your logbook — it produces the total km, business km, and business-use percentage the CRA requires.
If you are an employee with a per-km allowance: Check whether your allowance is reasonable. If it matches or exceeds the CRA rate, it is tax-free and you are done. If it is below the CRA rate or paid as a flat monthly amount, it will appear as taxable income on your T4. In that case, get a signed T2200 from your employer and claim actual expenses on Form T777.
Regardless of method: Keep a mileage logbook for the full year. Both approaches require one, and the CRA can deny your entire vehicle expense claim without it. Digital logs are accepted and preferred — they are harder to fabricate and easier to maintain.
For a full breakdown of every deductible vehicle expense, see vehicle expenses CRA deduction. For the complete 2026 rate tables and history, see CRA mileage rate 2026. And for the employee-vs-contractor distinction that determines which method you must use, see contractor vs employee vehicle expenses Canada.
