How to Properly Track Mileage and Vehicle Expenses for Your Business

Vehicle expenses represent one of the largest tax deductions for many Ontario businesses, yet they’re also one of the most commonly audited by the CRA. The reason is simple: many business owners claim vehicle expenses without maintaining proper documentation, leading to disallowed deductions, penalties, and back taxes. At BBS Accounting in Toronto, we help clients implement compliant mileage tracking systems that withstand CRA scrutiny while maximizing legitimate deductions.

Why the CRA Audits Vehicle Expenses

The CRA knows that vehicle deductions are frequently abused. Business owners claim personal driving as business, inflate mileage, or fail to maintain required logs. This makes vehicle expenses a primary audit target.

If audited without proper documentation, the CRA will disallow most or all of your vehicle deduction—potentially costing thousands in back taxes plus penalties and interest. The only defense is meticulous documentation maintained throughout the year.

CRA’s Mileage Log Requirements

The CRA requires detailed logs containing specific information for each business trip: date of the trip, destination (address or description), business purpose (who you met, what was discussed, why it was necessary), and kilometres driven (or starting/ending odometer readings).

This means you can’t simply say “drove 15,000 business km this year” without supporting detail. The CRA wants trip-by-trip records.

What Doesn’t Count as Proper Documentation:

• Calendar entries showing appointments (without km and destinations)
• Credit card receipts from gas stations (don’t show km)
• General estimates or reconstructed logs
• Monthly summaries without trip detail

What Does Count:

• Daily mileage log with required details for each trip
• GPS-based automatic tracking apps with trip records
• Contemporaneous records maintained throughout the year

At BBS Accounting, we’ve seen CRA auditors disallow tens of thousands in vehicle expenses simply because logs were inadequate, even when the business use was legitimate.

The Two Deduction Methods

Ontario business owners can choose between two methods for claiming vehicle expenses.

Method 1: Simplified Kilometre Rate

Track business kilometres and multiply by the CRA’s prescribed rate. For 2026: 70 cents per kilometre for the first 5,000 km driven, 64 cents per kilometre for kilometres beyond 5,000.

Example: You drove 12,000 business km in 2026.

• First 5,000 km × $0.70 = $3,500
• Next 7,000 km × $0.64 = $4,480
• Total deduction: $7,980

Advantages: Simple calculation, no need to track actual expenses (gas, insurance, repairs), easy to understand and implement, and acceptable to CRA.

Disadvantages: May provide lower deduction than actual expense method if your costs are high, no capital cost allowance claim on vehicle purchase.

Best For: Vehicles driven moderate distances, fuel-efficient vehicles, vehicles with low operating costs, or anyone wanting simplicity over maximum deduction.

Method 2: Actual Expense with Business Percentage

Track all vehicle expenses and claim the business-use percentage.

Eligible Expenses: Fuel and oil, repairs and maintenance, insurance, license and registration, lease payments or loan interest (not principal), parking (business-related), car washes, tires, and capital cost allowance (depreciation) on owned vehicles.

Calculate Business Percentage: Total business km / Total km (business + personal) × 100

Example:

• Total km driven: 20,000
• Business km: 12,000
• Business percentage: 60%
• Total vehicle expenses: $8,000
• Capital Cost Allowance: $2,000
• Total deductible: ($8,000 + $2,000) × 60% = $6,000

Advantages: May provide higher deduction than simplified method, can claim CCA on vehicle purchase, and accounts for actual costs.

Disadvantages: Must track all expenses throughout the year, more complex calculation, requires receipts for all expenses, and still need kilometre log to calculate business percentage.

Best For: Vehicles with high operating costs, expensive vehicles generating significant CCA, high percentage business use (over 80%), and those comfortable with detailed record-keeping.

Choosing the Method: Calculate both methods at year-end and choose whichever provides the higher deduction. You can switch methods year-to-year (with some limitations related to CCA).

At BBS Accounting, we analyze which method benefits each client most based on their driving patterns and vehicle costs.

Passenger Vehicle Limits

For “passenger vehicles” (cars, SUVs, vans primarily for passengers), the CRA imposes deduction limits.

Purchase Cost Limit: Maximum $37,000 (before HST) can be included in CCA calculations. Purchase a $50,000 vehicle, and you can only claim CCA on $37,000—the excess provides no tax benefit.

Lease Deduction Limit: Maximum approximately $950 monthly lease payment is deductible (exact amount calculated by formula based on manufacturer’s list price).

Interest Deduction Limit: Maximum $350 monthly in loan interest is deductible.

Vehicles Exempt from Limits:

• Trucks primarily for cargo
• Vans primarily for cargo (minimal passenger amenities)
• Vehicles used more than 50% for transporting goods/equipment/passengers in business
• Vehicles designed for 9+ passengers

Many contractors, tradespeople, and delivery businesses can avoid passenger vehicle limits by using trucks or cargo vans.

Zero-Emission Vehicle Incentives

The federal government provides substantial tax benefits for zero-emission vehicles to encourage adoption.

Immediate 100% CCA: Electric vehicles eligible for Class 54 or 55 can claim 100% of the cost as CCA in year one (after applying business-use percentage).

Class 54: Zero-emission passenger vehicles costing under $61,000 (before HST).

Class 55: Zero-emission passenger vehicles costing $61,000-$63,000 (before HST).

Example: Purchase electric vehicle for $55,000 + HST, use 60% for business.

• Business portion: $55,000 × 60% = $33,000
• Year 1 CCA: $33,000 (full amount)

Compare to conventional vehicle:

• Business portion: $37,000 × 60% = $22,200 (capped at passenger vehicle limit)
• Year 1 CCA: $22,200 × 30% × 50% (half-year rule) = $3,330

The electric vehicle provides $33,000 first-year deduction versus $3,330 for conventional—a massive difference.

This makes electric vehicles extremely tax-efficient for Ontario businesses with high marginal rates.

At BBS Accounting, we help clients model the tax savings from electric vehicle purchases versus conventional vehicles.

Tracking Tools and Apps

Manual logbooks work but require discipline. Automated apps make tracking effortless.

MileIQ (Recommended):

• Automatically detects drives using phone GPS
• Swipe right for business, left for personal
• Generates CRA-compliant reports
• Integrates with QuickBooks
• Cost: ~$60/year
• Available: iOS and Android

Everlance:

• Similar automatic tracking
• Also tracks expenses (receipt photos)
• Multiple vehicle tracking
• Cost: ~$60/year
• Good for contractors with multiple vehicles

Stride:

• Free for basic features
• Automatic trip detection
• Tax deduction calculation
• Supported by ads/upsells
• Good budget option

Hurdlr:

• Mileage plus full expense tracking
• Real-time tax estimate
• Integration with accounting software
• Cost: ~$100/year for premium

Manual Logbook:

• Paper logbook kept in vehicle
• Record each trip: date, destination, purpose, km
• Free but requires discipline
• Template available from CRA website

At BBS Accounting, we recommend MileIQ for most clients—the automatic tracking ensures no trips are forgotten, and the CRA-compliant reports provide perfect audit documentation.

What Qualifies as Business Driving

Deductible Business Driving:

• Driving from home office to client locations
• Driving between business locations
• Driving to meet suppliers, attend conferences, make deliveries
• Driving for business errands (bank, post office, business purchases)
• Driving to temporary work locations

Non-Deductible Personal Driving:

• Commuting from home to regular workplace (not home office)
• Personal errands and shopping
• Dropping kids at school
• Vacation driving
• Any non-business purpose

Grey Areas: If your home is your principal place of business, driving from home to client sites is business driving. If you have an office you commute to, that commute is personal even if you sometimes work from home.

The CRA scrutinizes home office claims that enable deducting what would otherwise be commuting. Ensure your home office qualifies properly.

Record Keeping Best Practices

Classify Trips Immediately: Don’t wait until week-end or month-end. Classify trips the same day while you remember the purpose.

Be Specific with Purposes: “Met Sarah Chen, prospective client, to discuss marketing services” is better than “client meeting.”

Note Unusual Circumstances: If you drove personal errands on a business trip, note it. Transparency helps during audits.

Save Locations: Apps allow saving frequent destinations (home, office, common clients) for faster future classification.

Review Weekly: Spend 5-10 minutes weekly ensuring all trips are classified. This is much easier than reconstructing months later.

Export Monthly: Export mileage reports monthly and save them. If your app account has issues, you don’t lose data.

Keep for 6 Years: The CRA can audit back 6 years. Keep all mileage records for this period.

Vehicle Purchase vs. Lease

Tax implications differ between buying and leasing.

Purchasing:

• Claim capital cost allowance (Class 10, 30% declining balance normally)
• Claim loan interest (capped at $350/month for passenger vehicles)
• Cannot deduct principal payments
• Ownership at end of payments
• Higher upfront cost

Leasing:

• Deduct lease payments (subject to limits for passenger vehicles)
• No CCA claims
• No ownership at lease end
• Lower upfront cost
• Vehicle refresh every few years

Which Is Better?

Tax-wise, owning often provides larger total deductions over time through CCA, especially for vehicles held many years. Leasing spreads deductions more evenly but may hit deduction caps.

Cash-flow-wise, leasing requires less upfront capital. Business owners who prefer newer vehicles every 3-4 years often favor leasing.

At BBS Accounting, we model both scenarios for clients considering vehicle acquisition, showing total tax impact over expected ownership period.

Common Mistakes

Claiming 100% Business Use When Not True: Unless you have a separate personal vehicle you use exclusively for personal driving, claiming 100% business use on your only vehicle is indefensible. The CRA knows you drive personally.

No Mileage Log: Claiming deductions without contemporaneous logs. If audited, these deductions will be disallowed entirely.

Reconstructing Logs After the Fact: Creating a log in December for the whole year based on calendar and memory. The CRA identifies these as fabricated and disallows deductions.

Including Commuting: Claiming driving from home to your regular place of business. This is personal, not deductible (unless home office is principal place of business).

Mixing Personal and Business Credit Cards: Using the same card for personal gas and business gas makes allocation difficult and raises audit red flags.

Not Tracking Total Kilometres: You need total km (business + personal) to calculate business percentage for actual expense method. Track everything, not just business.

If You’re Audited

If the CRA audits your vehicle expenses, they’ll request: complete mileage log for the year under audit, receipts for all claimed expenses (if using actual expense method), proof of business purpose for trips (meeting notes, contracts, invoices corresponding to trips), and vehicle ownership/lease documents.

With proper documentation from apps like MileIQ, CRA audits of vehicle expenses conclude quickly in your favor. Without documentation, even legitimate business driving gets disallowed.

Don’t wait for an audit to implement proper tracking. Start now.

Working with BBS Accounting

We help Toronto and Ontario clients with vehicle expense optimization:

• Recommending tracking apps and implementation
• Calculating which deduction method maximizes your benefit
• Ensuring mileage logs meet CRA requirements
• Preparing vehicle expense schedules for tax returns
• Advising on purchase vs. lease decisions
• Modeling electric vehicle tax benefits
• Audit support if CRA questions vehicle expenses

Our vehicle expense planning often saves clients $2,000-8,000 annually through proper tracking and strategic vehicle decisions.

The Bottom Line

Vehicle expenses are valuable deductions for Ontario business owners, but the CRA’s strict documentation requirements mean you must track properly from day one. Implement automatic tracking through apps, classify trips immediately while purpose is fresh, and maintain records for six years.

Don’t lose thousands in deductions by failing to track, and don’t risk penalties by claiming expenses you can’t document. Proper vehicle expense tracking is non-negotiable for tax compliance.

Contact BBS Accounting today to review your vehicle expense tracking. We’ll ensure you’re maximizing legitimate deductions while maintaining audit-proof records. Let us help you save money on vehicle expenses the right way—with perfect CRA compliance.