Millions of Canadians use their personal vehicle for business every year, and the Canada Revenue Agency lets you deduct a portion of those costs on your tax return. But the rules around personal vehicle business use in Canada are specific. You need to know what counts as business driving, how to calculate the right percentage, and what records to keep. This beginner’s guide walks through the entire process so you can claim confidently and avoid problems at tax time.
What Counts as Business Driving (and What Does Not)
The CRA draws a firm line between business driving and personal driving. Only kilometres driven for a legitimate business purpose qualify for a deduction. Getting this distinction right is the foundation of every vehicle expense claim.
Trips that count as business driving:
- Driving to meet a client or customer at their location
- Visiting suppliers, vendors, or business partners
- Travelling to a job site, inspection, or delivery
- Running business errands such as going to the bank for a business deposit or picking up supplies
- Driving from a qualifying home office to any business destination
Trips that do NOT count:
- Commuting from home to a regular, fixed workplace
- Personal errands, even during a workday
- Driving to and from lunch or personal appointments
- Any travel that is primarily personal in nature
The commuting rule catches many people off guard. If you are an employee who drives to the same office every day, that trip is personal — no matter how far it is. However, if you are self-employed and your home is your principal place of business, every trip you make from home to a business destination is considered a business trip. This distinction is one reason many self-employed Canadians maintain a home office designation.
How to Calculate Your Business-Use Percentage
Your business-use percentage determines how much of your vehicle expenses you can deduct. The formula is straightforward:
Business-Use % = Business Kilometres ÷ Total Kilometres × 100
For example, suppose you drove 22,000 km in total during the year and 15,400 km of that was for business. Your business-use percentage would be 15,400 ÷ 22,000 = 70%.
If your total vehicle expenses for the year came to $12,000, the deductible amount would be $12,000 × 70% = $8,400.
The key to making this calculation work is having an accurate count of both your business kilometres and your total kilometres for the year. The CRA requires you to record your odometer reading at the start and end of the tax year, and to log every business trip with the date, destination, purpose, and distance. Without a proper mileage log, the CRA can deny the entire deduction regardless of how many receipts you have.
After your first full year of keeping a logbook, the CRA offers a simplified method. You can keep a logbook for just three months and use it to project your annual business use, as long as the result falls within 10 percent of your base-year percentage. This reduces the record-keeping burden once you have an established pattern.
Eligible Vehicle Expenses You Can Claim
When you use the actual expense method, you apply your business-use percentage to all eligible vehicle costs. For the 2026 tax year, eligible expenses include:
- Fuel and oil
- Insurance premiums
- Maintenance, repairs, and tires
- Registration and licence fees
- Lease payments (capped at $1,100 per month for leases entered in 2026)
- Capital cost allowance on a purchased vehicle (Class 10.1 ceiling of $39,000 before tax for vehicles acquired in 2026)
- Interest on a vehicle loan (capped at $350 per month for loans entered in 2026)
- Parking fees paid during business trips
Items you cannot claim include parking tickets, traffic fines, and the personal-use portion of any expense.
Self-employed individuals report these expenses on Form T2125. Employees who have a signed T2200 from their employer claim on Form T777. For a detailed walkthrough of the claiming process, see how to claim mileage on taxes in Canada.
Insurance: Why You Must Notify Your Insurer
One area that many Canadians overlook when using a personal vehicle for business is insurance. Standard personal auto insurance policies are designed for commuting and personal errands. If you are regularly driving to client sites, transporting goods, or using your vehicle as part of your income-earning activities, your personal policy may not cover you in the event of an accident.
The consequences of not updating your coverage can be severe. If you have a collision while on a business trip and your insurer determines the vehicle was being used for commercial purposes not covered under your policy, your claim could be denied entirely.
Here is what you should do:
- Contact your insurer and explain how you use the vehicle for business. Describe the type of driving (client visits, deliveries, etc.) and the approximate percentage of business use.
- Add a business-use endorsement to your existing personal policy, or switch to a commercial policy if your insurer recommends it. The cost increase is often modest — and far less than the cost of a denied claim.
- Keep proof of coverage in case the CRA asks how your vehicle insurance relates to your business-use claim. Insurance premiums are a deductible vehicle expense, and proper coverage strengthens your overall claim.
Provincial requirements vary, so check with a local broker or your insurer directly for the rules in your province.
CRA Scrutiny of High Business-Use Claims
The CRA pays close attention to the business-use percentage reported on tax returns. Claims above 90 percent are flagged more frequently because auditors know that most vehicles have at least some personal use.
Claiming 100 percent business use is technically allowed but very difficult to defend. The CRA will want to see evidence that you never used the vehicle for groceries, medical appointments, or any personal trip. If the vehicle is the only car in the household, a near-total business-use claim becomes even harder to support.
A high business-use percentage is defensible when you can show:
- A second vehicle in the household that handles personal driving
- A detailed, contemporaneous mileage log backing every business trip
- A business that naturally requires heavy driving (real estate, construction, delivery services)
For most Canadians, a business-use percentage between 50 and 80 percent is typical and raises few concerns. If your legitimate percentage is above 90 percent, make sure your logbook is thorough and your records are airtight. Tripbook’s GPS-verified trip logs create the kind of contemporaneous, detailed documentation that stands up to CRA review.
For more on what triggers a closer look from the CRA, see CRA audit triggers for small business in 2026.
Putting It All Together: A Step-by-Step Summary
If you are new to claiming personal vehicle business use in Canada, here is the process from start to finish:
- Determine your employment status. Self-employed individuals claim on T2125. Employees need a signed T2200 from their employer and claim on T777.
- Start a mileage log. Record every business trip with the date, destination, purpose, and kilometres driven. Note your odometer reading on January 1 and December 31.
- Notify your insurer. Make sure your auto insurance covers business use of the vehicle.
- Track all vehicle expenses. Keep receipts for fuel, insurance, maintenance, lease or loan payments, and registration fees throughout the year.
- Calculate your business-use percentage at year end using the formula above.
- Apply the percentage to your total eligible expenses and enter the result on the correct tax form.
The entire process becomes much simpler when you automate the hardest part — the mileage log. Tripbook runs in the background on your phone, automatically recording every trip with GPS-verified start and end points, distance, and timestamps. At tax time you have a complete, CRA-ready log without the daily hassle of manual entries.
Getting the deduction right means real savings. A self-employed consultant driving 18,000 business kilometres a year with $14,000 in vehicle expenses and a 70 percent business-use ratio would deduct $9,800 — a meaningful reduction in taxable income. Start tracking today so you capture every eligible kilometre.
