- Both employees and self-employed people calculate their deductible vehicle expenses the same basic way: figure out the percentage of your total driving that was for business purposes,…
- The employer sign-off requirement is the biggest practical divide.
- Regardless of your status, a logbook is your single best defence if the CRA ever asks you to substantiate a vehicle expense claim.
Whether you drive for work as an employee or run your own business, the CRA lets you deduct a portion of your vehicle costs against the income you earn — but the rules, the forms, and the fine print are not identical for both groups. The employee vehicle expense deduction shares a lot of DNA with the self-employed version, but a few real differences catch people off guard, especially when they switch from one status to the other.
This article lays out where the two paths overlap, where they diverge, and what records you need either way.
The Common Foundation
Both employees and self-employed people calculate their deductible vehicle expenses the same basic way: figure out the percentage of your total driving that was for business purposes, then apply that percentage to your total vehicle costs for the year (fuel, insurance, maintenance, lease payments or depreciation, and financing costs, among others).
Both groups are expected to support that percentage with a logbook — a contemporaneous record of business trips, including dates, destinations, purpose, and kilometres driven — rather than an after-the-fact estimate.
Where Employees and the Self-Employed Diverge
| Feature | Employee | Self-Employed |
|---|---|---|
| Form required to claim | T777, supported by a signed T2200 from the employer | T2125, as part of the business income calculation |
| Employer sign-off needed | Yes — your employer must confirm the job required vehicle use and that you weren't fully reimbursed | No — it's your own business |
| Can create a loss with the deduction | No — employment vehicle expenses generally can't exceed employment income | Vehicle expenses are one part of the broader business expense calculation, which follows different loss rules |
| Reimbursed portion | Anything your employer reimbursed (especially a reasonable per-kilometre allowance) is generally excluded from your claim | Not applicable in the same way — a sole proprietor isn't reimbursing themselves |
| HST/GST treatment | May be eligible for a separate employee GST/HST rebate on the business-use portion, depending on the employer's registration status | If HST-registered, can generally claim input tax credits on the business-use portion of HST paid on vehicle costs |
The employer sign-off requirement is the biggest practical divide. A self-employed person doesn't need anyone else's permission to claim vehicle costs against their business income — they just need to justify the claim to the CRA directly. An employee needs their employer to confirm, in writing, that the job required the vehicle use in the first place.
The Logbook: Non-Negotiable for Both
Regardless of your status, a logbook is your single best defence if the CRA ever asks you to substantiate a vehicle expense claim. At minimum, keep a record of:
- [ ] The date of each business trip
- [ ] Where you went and the business purpose
- [ ] The kilometres driven for that trip
- [ ] Your vehicle's total kilometres driven for the year (starting and ending odometer readings)
- [ ] Receipts for fuel, insurance, maintenance, and any lease or loan payments
Without a logbook, the CRA is generally free to disallow or significantly reduce a claimed business-use percentage on review, even where the underlying expenses were real.
What Counts as "Business" Driving
Commuting from home to your regular place of employment or your regular place of business is not business use — it's considered personal, no matter how far the commute is. Business use generally means driving between job sites, to meet clients, to run business errands, or between multiple places of work in the same day. If you work partly from a home office that qualifies as your principal place of business or employment, trips from that home office to other work locations can often count as business use — but the boundary between commuting and business travel is one of the most heavily scrutinized areas on a CRA review, so document it carefully.
Frequently asked questions
I switched from employee to self-employed partway through the year — do I need two logbooks?
It's simplest to keep one continuous logbook, but you'll need to split your claim between a T777 for the employee portion of the year and a T2125 for the self-employed portion, using the vehicle costs and business-use percentage that apply to each period.
My employer pays me a per-kilometre allowance — can I still claim vehicle expenses?
If the allowance is intended to fully cover your vehicle costs, it typically is not taxable to you, but you generally can't also claim a separate vehicle expense deduction for the same driving. If you believe the allowance doesn't reasonably cover your actual costs, discuss the details with a tax professional.
Does leasing versus owning the vehicle change how the deduction works?
Both are deductible, but the mechanics differ — lease payments are deducted more directly (subject to certain limits), while an owned vehicle's cost is deducted gradually as depreciation (capital cost allowance) rather than all at once. Either way, only the business-use percentage is deductible.
What happens if I don't have a logbook for past years but want to start now?
Start keeping one immediately going forward — a logbook you start today protects your claims from this point on. For past years without records, speak with a tax professional about what reconstruction, if any, the CRA might reasonably accept.
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