Allowance vs reimbursement in Canada: how the CRA distinguishes them
Many Canadian employers conflate allowances and reimbursements. The CRA treats them differently — and that affects withholding.
Two CRA categories, two tax outcomes
The CRA distinguishes:
**Allowance**: a payment to an employee based on a per-km rate or any non-actual basis (flat monthly, lump sum).[^cra-allowances-88] It is given without requiring receipts for individual expenses.
**Reimbursement**: a payment that compensates the employee for specific expenses they incurred and documented (typically with receipts). Often called "actual cost reimbursement".
How tax treatment differs
| Category | Tax to employee | T4 reporting | Source deductions | |---|---|---|---| | Reasonable per-km allowance (within CRA rate) | Tax-free | Box 14 only if part of salary; otherwise none | None | | Excess allowance (above CRA rate) | Excess is taxable | Box 14 (the excess portion) | Income tax, CPP, EI on excess | | Flat monthly allowance | Fully taxable | Box 14 (full amount) | Income tax, CPP, EI on full amount | | Reimbursement of documented expenses | Tax-free | Not reportable (it's not income) | None |
The critical point: a flat monthly "car allowance" is **always taxable** because it's not based solely on kilometres driven. Many employers don't realise this and fail to apply source deductions, generating CRA assessments and penalties.
Why employers use flat allowances anyway
- **Predictability** for budgeting. - **Simplicity** in payroll (no need to track km). - **Hybrid retention tool** ("car allowance" feels like a benefit even if it's taxable).
But the cost is real: that $500/month allowance grosses up to ~$700/month in payroll cost when you include Income Tax, CPP, EI, and (in Quebec) QPP/QPIP.
When to switch from allowance to reimbursement
If your team has high per-km variability (some employees drive 1,000 km/month, others 4,000), an allowance penalises the high-km drivers and overpays the low-km ones. Switching to reimbursement at the CRA reasonable rate fixes both.
When to keep an allowance
- Small teams with stable driving patterns where the simplicity outweighs the tax cost. - Senior roles where the allowance is part of total compensation negotiation. - Operations where logging individual trips is impractical.
Hybrid: car allowance + per-km reimbursement
CRA allows both at the same time, with the caveat that the allowance is fully taxable as employment income, AND the per-km reimbursement at the reasonable rate is tax-free if it covers actual business kilometres separately documented. This setup is common for executives and senior sales roles in Canadian SMEs.
Practical example
Maria is a regional sales manager in Toronto. Her contract:
- Salary: $90,000. - Car allowance: $600/month (taxable). - Mileage reimbursement at 72¢/66¢ for documented business trips (tax-free).
In 2026 she drove 8,000 km on documented business trips. She receives:
- $7,200 car allowance (taxable, full source deductions). - 8,000 × 72¢ = $5,760 mileage reimbursement (tax-free).
Total vehicle compensation: $12,960. Of this, only $7,200 is taxable.
Bottom line
If you're an employer paying a flat monthly car allowance and not deducting tax, fix it before the next CRA filing cycle. If you're an employee receiving one and not understanding the tax impact, ask payroll for clarification.