Car Expenses and Tax Deductions: Understanding the 5,000 km Rule at 88 Cents Per Kilometre
If you use your car for work-related purposes, you may be able to claim a deduction for car expenses on your personal tax return. The Australian Taxation Office (ATO) has specific rules about what qualifies, how to calculate your deduction, and what records you need to keep.
What Car Expenses Can Be Deductible?
You can claim deductions for car expenses only if the car is used for income-producing activities. Common deductible expenses include fuel, maintenance, repairs, insurance, registration, and depreciation. However, you cannot claim expenses for private use, such as commuting to and from work or personal errands.
The 5,000 km Rule and 88 Cents Per Kilometre
The ATO allows you to use a simplified method to calculate car deductions if your work-related travel is 5,000 km or less per year. Under this rule, you can claim 88 cents per kilometre without needing to keep detailed records of your actual expenses. This is often called the "cents per kilometre" method and is the easiest way to claim car deductions for low-mileage users.
For example, if you travelled 3,000 km for work-related purposes, your deduction would be 3,000 km × 88 cents = AUD 2,640.
If your work-related travel exceeds 5,000 km per year, you must use the actual expense method, which requires you to calculate your deduction based on real expenses and the percentage of work-related use.
Is a Logbook Required?
A logbook is essential if you claim car deductions using the actual expense method. The ATO requires you to maintain a logbook for at least 12 consecutive weeks to establish your work-related travel pattern and substantiate your claim. This logbook should record the date, distance travelled, and purpose of each trip.
If you claim under the 5,000 km rule using the 88 cents per kilometre method, a logbook is required now 2026 fiancial year. You only need to keep records showing your work-related travel distance and the dates of travel.
Without a logbook when using the actual expense method, the ATO will likely disallow your claim or significantly reduce it if you cannot substantiate your work-related travel percentage.
Deduction Methods Comparison
| Deduction Method | Annual Work-Related Travel | Rate | Logbook Required | Record Keeping |
|---|---|---|---|---|
| Cents per kilometre | 5,000 km or less | 88 cents per km | YES | Travel distance and dates only |
| Actual expense method | More than 5,000 km | Based on actual expenses and work-related percentage | Yes (12 weeks minimum) | Detailed expenses, logbook, and receipts |
Example Calculation
| Work-Related Travel Distance | Rate per km | Tax Deduction |
|---|---|---|
| 2,000 km | 88 cents | AUD 1,760 |
| 3,500 km | 88 cents | AUD 3,080 |
| 5,000 km | 88 cents | AUD 4,400 |
Key Takeaways
- Car expenses are deductible only for work-related use, not private use
- If work-related travel is 5,000 km or less per year, use the 88 cents per kilometre
- If travel exceeds 5,000 km, you must use the actual expense method and maintain a logbook for at least 12 weeks
- Keep records of all travel distances and dates to support your claim
- The 88 cents per kilometre rate simplifies your tax calculation and reduces record-keeping requirements
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