AU Cents per KM Tax Deduction Estimator
The Cents per Kilometre method is the simplest and most widely used approach for Australian taxpayers to claim work-related car expenses on their annual income tax return.
This browser-based tool allows Australian employees, sole traders, and independent contractors to calculate their allowable tax write-offs, apply official statutory rates determined by the Australian Taxation Office (ATO), check strict 5,000 km statutory limits, and project net tax savings based on their marginal income tax bracket.
Official ATO Statutory Cents per KM Rates Table
The ATO sets an all-inclusive single rate per kilometre for each income year. This flat rate covers all vehicle operational expenses, including fuel, oil, registration, insurance, routine servicing, repairs, and depreciation:
| Financial Year | Approved Rate per KM | Max Statutory Deduction (5,000 km Cap) | Record-Keeping Requirements |
|---|---|---|---|
| 2026–27 | 91 cents / km | $4,550.00 | Diary records or log entries showing calculations |
| 2025–26 | 88 cents / km | $4,400.00 | Diary records or log entries showing calculations |
| 2024–25 | 88 cents / km | $4,400.00 | Diary records or log entries showing calculations |
| 2023–24 | 85 cents / km | $4,250.00 | Diary records or log entries showing calculations |
| 2022–23 | 78 cents / km | $3,900.00 | Diary records or log entries showing calculations |
Key Rules for Claiming Motor Vehicle Expenses in Australia
- Strict 5,000 KM Limit: You can claim up to a maximum limit of 5,000 business kilometres per vehicle, per income year under the cents-per-km method. If you travel more than 5,000 km for work, the claim stops at 5,000 km.
- No Written Receipts Needed: You do not need formal receipts for petrol, registration, or repairs. However, you must be able to demonstrate to the ATO how you estimated your work distance (e.g., job logs, calendar appointments, or diary entries).
- Eligible Travel Types: You can claim travel between separate workplaces, visits to clients or suppliers, driving to offsite training, or carrying bulky tools that cannot be stored at work. Normal commuting from home to your primary workplace is generally non-deductible.
- Cents per KM vs Logbook Method: If your work travel significantly exceeds 5,000 km per year, maintaining a 12-week continuous logbook may produce a substantially larger tax refund by allowing you to claim actual vehicle running expenses.
Deep Dive: Optimizing Work Vehicle Claims for ATO Audits
When preparing your myTax return or consulting a Registered Tax Agent in Australia, ensuring your work-related car expense claim satisfies ATO compliance checks is critical. While the cents per km option waives the requirement for fuel receipts, taxpayers must prove ownership or operational control of the eligible vehicle (such as a leased car, private vehicle, or vehicle under a financing contract).
Calculating Net Cash Refund Impact
A tax deduction reduces your total assessable income rather than giving a dollar-for-dollar tax refund. For instance, if you drive 4,000 business kilometres in the 2026–27 income year at 91c/km, your total tax deduction equals $3,640.00. If your marginal income tax bracket is 30% (plus the 2% Medicare Levy), your net cash refund bonus equals:
$3,640.00 × 32% = $1,164.80 Net Refund Addition