Can You Write Off Gas on Your Taxes in Canada?

Yes, you can write off gas on your taxes in Canada, but only the business-use portion counts, and only certain types of taxpayers qualify.

Most Canadians assume they can’t claim gas because it’s a personal vehicle. But if you drive for work, you could be leaving real money on the table.

Learn who qualifies, how to calculate your deduction, and which CRA forms to use when writing off gas on your taxes.

Key Takeaways

Self-employed Canadians, commission employees with a T2200, and incorporated business owners can all claim gas, but each group files differently.
You can only deduct the business-use portion of your gas. Personal driving is always excluded.
You need a CRA-compliant logbook to back up your claim. No logbook, no deduction.

Who Can Write Off Gas Expenses in Canada?

According to the CRA’s motor vehicle expense rules, three main groups can claim gas as a business expense: self-employed individuals, eligible employees, and incorporated business owners.

Self-Employed Individuals and Sole Proprietors

Canadian tax rules allow self-employed Canadians to deduct gas as a motor vehicle expense on Form T2125 (Statement of Business or Professional Activities), specifically on Line 9281.

This applies to freelancers, independent contractors, sole proprietors, delivery drivers, real estate agents, and rideshare operators, basically anyone using a vehicle to earn self-employment income. It also allows tradespersons to deduct fuel costs when travelling between job sites.

The deduction reduces net business income (your total business revenue minus eligible expenses), which means a lower tax bill overall.

Commission Employees and Eligible Salaried Workers

The CRA permits commission employees with a signed T2200 to claim gas as an employment expense, but your employer must sign CRA Form T2200 (Declaration of Conditions of Employment) confirming that you’re required to use your own vehicle and aren’t reimbursed for it.

Salaried employees can qualify, too. They just complete different lines on Form T777 (Statement of Employment Expenses) than commission employees do. Real estate agents and outside sales reps qualify through this route. So if you’re in outside sales, this is worth knowing.

Note: The CRA does not allow gas deductions for salaried employees without a T2200 on file. If your employer hasn’t signed one, you can’t claim gas at all.

Incorporated Business Owners

Incorporated business owners deduct gas expenses through the corporation, not on their personal T1 General Tax Return (individual income tax return). The corporation claims vehicle expenses as business costs, subject to the same business-use rules and documentation requirements.

Not incorporated yet? Ownr makes it easy to register your business in Canada so you can start claiming eligible expenses and see where you can save more money for your business.

Which Gas Expenses Don’t Qualify as Write-Offs?

The CRA is clear on what doesn’t qualify:

Commuting from home to a regular place of work is never tax-deductible, no matter how far you drive. It’s personal use under CRA rules.
Personal trips (groceries, errands, vacations) using a mixed-use vehicle (one you use for both personal and business purposes).
Gas costs your employer has already reimbursed. You can’t double-dip.
Parking fines and traffic tickets, even if they happened during a business trip.

How to Calculate Your Gas Tax Deduction

Fuel deductions are prorated based on the ratio of business kilometres to total kilometres driven. Here’s the formula:

(Business km ÷ Total km) × Total gas expense = Deductible amount

Example: You drove 20,000 km total last year. Of those, 12,000 km were for business. That’s 60% business use. Your total gas spend was $4,000. Your deductible amount: $2,400.

To apply this formula, you first need to calculate your total gas expense. The CRA gives you two ways to do that:

Actual expense method: Track your real gas receipts, apply the business-use percentage, and claim the result on Form T2125. This is the method self-employed individuals must use.
CRA mileage rate: This applies CRA-prescribed rates as an alternative to tracking actual fuel costs, but only for employer reimbursements to employees. Self-employed individuals cannot use this rate on T2125. You must track actual expenses.

The 2026 CRA automobile allowance rates are:

$0.73/km for the first 5,000 km (Ontario, Quebec, British Columbia, Alberta, Saskatchewan, Manitoba, New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador)
$0.67/km thereafter (Ontario, Quebec, British Columbia, Alberta, Saskatchewan, Manitoba, New Brunswick, Nova Scotia, Prince Edward Island, Newfoundland and Labrador)
$0.77/km for the first 5,000 km (Yukon, Northwest Territories, Nunavut)
$0.71/km thereafter (Yukon, Northwest Territories, Nunavut)

Keep all your gas receipts alongside your logbook. You’ll need both to back up your claim. Also, be aware that a very high vehicle expense claim can trigger CRA scrutiny if it appears disproportionate to business income. Keep your records clean and tidy.

Which CRA Forms Do You Need to Claim Gas?

Here’s a quick-reference breakdown:

Self-employed: Gas goes on Line 9281 of Form T2125, attached to your T1 General Tax Return.
Employee: Use Form T777, attached to your T1. You’ll also need a signed T2200 from your employer.

Motor vehicle expenses you can list include insurance, maintenance and repairs, licence fees, lease payments, loan interest, and Capital Cost Allowance (CCA, which is the depreciation you claim on the vehicle over time, claimed on Line 9936).

Speaking of insurance, if you want to know whether car insurance is tax-deductible for your business, that’s worth a read too.

If you’re in Quebec, you must also comply with Revenu Québec vehicle expense rules and may need to file provincially as well. Check Revenu Québec for the details.

What Logbook Records Does the CRA Require?

The CRA requires receipts and a detailed logbook to substantiate the business-use percentage of fuel costs. Without one, the CRA can reject your entire vehicle deduction.

Each logbook entry must include:

Date of the trip
Destination
Purpose of the trip
Kilometres driven

You have two options:

Full logbook: Record every single trip for the entire year.
Simplified logbook: Complete one full 12-month log (your “base year”), then use a 3-month representative sample in subsequent years. This works as long as your business use doesn’t shift by more than 10% from the base year.

Note down your odometer reading at the start and end of each fiscal year. If you switch vehicles mid-year, log the dates and odometer readings for each one. Records must be kept for six years from the end of the tax year they were used.

Frequently Asked Questions

Can you write off 100% of your gas if you use your car only for business?

Yes. If you can document that 100% of your kilometres were for business, you can write off gas on your taxes in full. In practice, the CRA applies a “reasonableness test.” A near-100% business-use claim is audit-sensitive and must be backed by a complete, contemporaneous logbook.

Does the CRA mileage rate cover gas?

Yes. The 2026 CRA automobile allowance rate ($0.73/km for the first 5,000 km in the provinces) covers all vehicle operating costs, including fuel. But this rate applies to employer reimbursements to employees, not to self-employed individuals claiming actual expenses on T2125.

What happens if you claim gas without a logbook?

Without a logbook, the CRA can disallow your entire vehicle expense deduction during an audit. No logbook means no substantiation, which means no deduction.

Can a delivery driver or rideshare operator write off gas in Canada?

Yes. Delivery drivers and rideshare operators (Uber, DoorDash, couriers, etc.) are classified as self-employed and can write off gas on their taxes using Form T2125. Just track both personal and business kilometres carefully. Your vehicle is almost certainly mixed-use, so that personal vs. business km split matters a lot.