Car Tax Deductions Guide Australia (2026–27)

If you use your personal vehicle for work-related purposes—such as visiting clients, traveling between multiple jobs, transporting bulky work equipment, or attending off-site meetings—you are entitled to claim substantial work-related car expense deductions on your Australian income tax return.

The Australian Taxation Office (ATO) allows individual taxpayers and sole traders to choose between two official calculation methods: the Cents-per-km Method (88 cents/km) and the Logbook Method.

Choosing the right method can mean the difference between a few hundred dollars and thousands of dollars in extra tax refund. This guide provides a detailed breakdown of both methods, what trips qualify, and record-keeping requirements for Tax Year 2026–27.

1. What Work Trips Are 100% Tax Deductible?

The ATO has strict rules separating ordinary private commuting from legitimate work travel:

Eligible Work Trips (CAN Claim):

• Traveling directly from one job site to another job site during the same day.
• Traveling from your regular workplace to visit clients, suppliers, or attend work conferences.
• Traveling from your home to an alternative, non-regular work location (e.g. visiting a client site) and then returning directly home.
• Transporting bulky work tools or equipment (e.g. trade ladders, medical gear, heavy musical instruments) that your employer requires you to transport and where secure storage is not available at work.

Ineligible Private Trips (CANNOT Claim):

• Normal daily commuting between your home and your regular workplace (even if you live far away or work outside public transport hours).
• Minor personal detours (e.g. stopping for personal groceries on the way back from a client visit).

2. Method 1: The Cents-per-km Method (88c / km)

The Cents-per-km Method is the simplest and most convenient calculation option:

$\text{Car Tax Deduction} = \text{Work Kilometres Claimed (Max 5,000 km)} \times \$0.88$

• Statutory Rate: 88 cents per kilometre for the 2026–27 financial year.
• Maximum Claim Limit: 5,000 business kilometres per vehicle per year (maximum deduction of $4,400 per car).
• What Is Covered by the 88c Rate: All vehicle running costs, including petrol, diesel, EV charging, comprehensive insurance, servicing, registration, and vehicle depreciation. (You cannot claim separate fuel or maintenance bills on top).
• Record Keeping: You do not need formal logbooks or receipts, but you must be able to show how you calculated your work kilometres (e.g. a diary log of client appointments or calendar entries).

3. Method 2: The Logbook Method (Maximum Deductions)

If you drive more than 5,000 work kilometres or operate an expensive vehicle with high annual running costs, the Logbook Method almost always delivers a significantly higher tax refund.

How the Logbook Method Works:

1. You keep a continuous 12-week representative logbook recording every business trip (date, start/end odometer readings, kilometres traveled, and purpose of trip).
2. Calculate your Business Use Percentage: $\text{Business Use \%} = \left( \frac{\text{Total Business Kilometres in 12 Weeks}}{\text{Total Kilometres Driven in 12 Weeks}} \right) \times 100$
3. Your logbook remains valid for 5 full financial years, provided your driving patterns do not change substantially.
4. You claim your business percentage against all actual vehicle expenses incurred across the full 12 months:
   • Fuel and electricity charging costs.
   • Comprehensive car insurance and CTP registration.
   • Servicing, tires, and maintenance repairs.
   • Car loan interest (if financed) or commercial lease fees.
   • Vehicle Depreciation (Division 40 effective life depreciation up to the ATO luxury car depreciation limit).

4. Real-World Comparison: Cents-per-km vs. Logbook

Consider Emma, a sales representative who drives 12,000 total kilometres in a year, of which 8,400 km (70%) are legitimate client visits. Her total annual car expenses (fuel, insurance, rego, servicing, interest, depreciation) equal $14,500:

By keeping a simple 12-week logbook, Emma claims an extra $5,750 in tax deductions, putting $1,840 extra cash into her tax refund!

5. Calculate Your Car Tax Deductions Today

Model your driving deductions and compare both ATO methods using our free tools:

• Car Tax Deduction Calculator — Compare Cents-per-km (88c/km) vs Logbook Method deductions.
• Car Running Cost Calculator — Model total annual fuel, insurance, and maintenance costs.
• Tax Deduction Calculator — Estimate your overall tax refund boost across all work expenses.