GST/HST Input Tax Credit Vehicle: Recover Sales Tax on Business Driving

If you drive for business and pay GST/HST input tax credit vehicle expenses, you may be leaving thousands of dollars on the table every year. Registered businesses can recover the sales tax paid on fuel, repairs, lease payments, and even the vehicle purchase itself through Input Tax Credits (ITCs). The amount you recover depends on your business-use percentage, your province, and whether you are a sole proprietor or corporation. This guide walks through every rule you need to know for 2026.

What Are Input Tax Credits and Who Can Claim Them?

An Input Tax Credit is a dollar-for-dollar recovery of the GST/HST you paid on business expenses. When you file your GST/HST return, you subtract the ITCs from the tax you collected, and only remit the difference to the CRA.

To claim ITCs on vehicle expenses, you must meet two requirements:

1. You must be a GST/HST registrant. Voluntary registration is available once you have commercial activity, even if your revenue is below the $30,000 small-supplier threshold.
2. The vehicle must be used in commercial activities. Personal-use-only vehicles do not qualify. The proportion of business use determines how much you recover.

ITCs are claimed on line 106 of your GST/HST return. You have up to four years from the due date of the return in which the ITC could first have been claimed (two years for large businesses). Missing this window means the credit is forfeited, so timely filing matters.

The 90% Business Use Rule: Three Tiers of ITC Eligibility

The CRA divides vehicle ITC eligibility into three tiers based on business-use percentage. These tiers differ for sole proprietors and partnerships versus corporations.

For sole proprietors and partnerships:

• 90% or more business use — Claim the full ITC on eligible vehicle costs, including the entire GST/HST on a vehicle purchase, subject to the capital cost limitation ($38,000 before tax for passenger vehicles acquired in 2025; the 2026 limit has not yet been announced). The full ITC is claimed upfront in the period the expense occurs.
• More than 10% but less than 90% business use — The ITC on the vehicle purchase is not claimed upfront. Instead, it is calculated each year based on the Capital Cost Allowance (CCA) claimed for that vehicle, multiplied by a tax fraction (for example, 13/113 for Ontario HST). Operating expenses like fuel and repairs use the standard business-use percentage.
• 10% or less business use — No ITC is available on any vehicle-related expense.

For corporations, the threshold is more favourable. A corporation that uses a vehicle more than 50% for commercial activities can claim the full upfront ITC on purchase or lease, subject to the capital cost limitation. Below 50%, no ITC is available.

This tiered system makes accurate mileage tracking critical. A business-use percentage of 89% versus 91% can mean the difference between a full upfront ITC and years of gradual CCA-based recovery. Tripbook automates this tracking so your percentage is always audit-ready.

ITCs on Vehicle Purchase, Lease, Fuel, and Operating Costs

Different vehicle expenses have different ITC treatment. Here is what qualifies.

Vehicle purchase: The GST/HST paid on the full purchase price is recoverable as an ITC. For passenger vehicles, the eligible capital cost is capped (currently $38,000 before tax). If you paid $45,000 plus HST for a car, only the GST/HST on $38,000 forms the basis for the ITC. The remaining tax is not recoverable. Zero-emission vehicles have a higher ceiling of $61,000 before tax under Class 54.

Lease payments: GST/HST on each lease payment is eligible for an ITC, claimed in the period the payment is due. However, if the lease cost exceeds the CRA’s deductible limit ($1,100 per month before tax for leases entered into in 2026), the ITC on the excess amount is recaptured. You effectively only recover the tax on the deductible portion.

Fuel: Fully subject to GST/HST and eligible for an ITC based on business-use percentage. Note that federal and provincial fuel excise taxes are not GST/HST and cannot be claimed as ITCs.

Repairs and maintenance: Parts and labour charges include GST/HST, and the full amount is ITC-eligible proportional to business use.

Insurance: Exempt from GST/HST under the Excise Tax Act. No ITC is available on insurance premiums — this applies in every province.

Parking and tolls: Subject to GST/HST and eligible for ITCs at your business-use percentage.

CCA-Based ITC Calculation for Mixed-Use Vehicles

When business use falls between 10% and 90% (for sole proprietors and partnerships), the ITC on the vehicle purchase is not claimed as a lump sum. Instead, you calculate it annually based on the CCA deduction.

Here is how it works:

1. Determine the CCA class for your vehicle (typically Class 10 or Class 10.1 for passenger vehicles, Class 54 for zero-emission vehicles).
2. Calculate the CCA deduction for the year, applying the half-year rule in the first year.
3. Multiply the CCA amount by your business-use percentage.
4. Apply the tax fraction to determine the ITC.

Example: You buy a $38,000 passenger vehicle in Ontario (13% HST) with 75% business use. In year one, Class 10.1 CCA at 30% with the half-year rule gives a $5,700 CCA deduction. The ITC is: $5,700 x 75% x 13/113 = $492. Each subsequent year, the CCA declines, and so does the annual ITC.

This gradual approach recovers less in the early years compared to the full upfront ITC available at 90%+ use. Over the life of the vehicle, the total recovery is proportional to cumulative CCA and business use.

For operating costs (fuel, repairs, lease payments) in the mixed-use range, the calculation is simpler: multiply the GST/HST paid by your business-use percentage. No CCA involvement is needed for these recurring expenses.

Provincial HST Rate Differences: What You Actually Recover

The amount of GST/HST you pay — and therefore recover — varies significantly by province. Canada has three tax structures:

HST provinces combine federal GST with provincial tax into one rate:

• Ontario: 13%
• Nova Scotia: 14% (reduced from 15% on April 1, 2025)
• New Brunswick, Newfoundland and Labrador, Prince Edward Island: 15%

GST-only provinces and territories charge only the 5% federal rate:

• Alberta, British Columbia (GST + 7% PST separately), Saskatchewan (GST + 6% PST), Manitoba (GST + 7% RST)
• Yukon, Northwest Territories, Nunavut: 5% GST only

Quebec uses 5% GST plus 9.975% QST, administered separately through Revenu Quebec. QST ITCs (called Input Tax Refunds) are claimed on a separate QST return.

The practical impact is significant. On $5,000 of fuel, an Ontario business recovers $650 in ITCs at 13% HST, while an Alberta business recovers $250 at 5% GST. The higher the HST rate, the larger the ITC — which also means the penalty for missing legitimate claims is steeper in HST provinces.

Note that provincial PST (in BC, Saskatchewan, Manitoba) is generally not recoverable through the GST/HST ITC system. Only the federal GST component generates an ITC in those provinces.

Record-Keeping and the Mileage Log Connection

The CRA can deny ITCs during an audit if documentation is incomplete. You need:

• Receipts and invoices showing the supplier’s GST/HST registration number and the tax amount charged. For purchases over $150, the invoice must include your name or business name.
• A mileage logbook that establishes your business-use percentage. This is the same log used for income tax deductions on your T2125, and the percentage flows directly into your ITC calculations.
• Retention for six years — all ITC supporting documents must be kept for at least six years from the end of the year to which they relate.

The simplified ITC method is available to businesses with annual revenue under $1,000,000. Instead of tracking GST/HST on each receipt, you multiply total eligible expenses (tax included) by the applicable tax fraction (5/105, 13/113, 14/114, or 15/115). This reduces paperwork while producing an equivalent result.

Tripbook maintains a CRA-compliant mileage log that calculates your business-use percentage automatically. Since this single percentage drives both your vehicle expense deductions and your GST/HST ITC claims, keeping it accurate has a compounding effect on your total tax savings. Download Tripbook to start building your audit-ready log today.