Buying a car for business use can offer valuable tax deductions—but it’s not always straightforward. Understanding the rules around vehicle tax write-offs, depreciation, and GST is crucial to ensure compliance and maximise your savings.
What Is a Business Car Tax Write-Off?
A tax write-off reduces your taxable income by accounting for eligible business-related expenses. For business vehicles, the ATO allows you to claim:
- Purchase costs (up to limits)
- Running expenses (fuel, insurance, servicing)
- Depreciation (if applicable)
Car Limit (2024–25)
- $20,000 threshold for instant asset write-off (for eligible small businesses)
- $69,674 car limit for claiming GST credits (max GST claim is $6,334)
Eligibility Checklist
To qualify for a car write-off:
- Business Use Must Exceed 50%
- Accurate Records Required – Keep a detailed logbook and receipts
- Choose an ATO-Approved Method:
- Logbook Method: Actual business-use % of all expenses
- Cents per Kilometre: 85c/km (up to 5,000 km/year), for sole traders/partnerships only
Impact of Business Structure
| Structure | Claim Method | Notes |
| Sole Trader/Partner | Logbook or cents per km | Simpler but limited at high mileage/income |
| Company/Trust | Actual expenses only | Cannot use cents/km; may attract Fringe Benefits Tax (FBT) if car is used privately |
Depreciation Methods
- Instant Asset Write-Off (Under $20,000)
- Full deduction in the year of purchase (if car cost < $20,000 and business use is >50%)
- General Depreciation Pool (Over $20,000)** Small Business only
- 15% deduction in first year
- 30% each year after
- For larger businesses it’s depreciated over its effective life. This is 25% per annum.
Note: If using the cents per kilometre method, you cannot claim depreciation separately—it’s already built into the rate.
The ATO has imposed a car limit which is the maximum amount that can be used as a tax deduction and depreciation. For the 2024/25 financial year, the car limit is $69,674.
GST Implications
- Claimable GST: Up to 1/11th of $69,674 = $6,334 (max)
- Luxury Car Tax (LCT) applies if car exceeds $76,950 (fuel-efficient) or $91,387 (others)
- If you sell the car later, GST is payable on the full sale price (no limit applies)
Common Mistakes to Avoid
- Poor Record-Keeping: No logbook = no claim
- Overestimating Deductions: Must reflect actual business use
- Buying Luxury Cars for Tax Write-Off: High upfront costs, luxury car tax, and steep depreciation
Key Takeaways
| Tip | Insight |
| Use the right method | Sole traders can use logbook or cents/km; companies must use actuals |
| Track everything | Maintain logbooks, receipts, and service history |
| Consider the full cost | Factor in fuel, insurance, depreciation—not just purchase price |
| Think beyond tax | A car should suit your business needs, not just tax strategies |
Conclusion
Buying a car for your business can deliver tax advantages, but only if done right. Understand your structure, record usage accurately, and avoid overclaiming. Most importantly, assess whether the purchase makes economic sense for your operations—not just for your tax return.
Consult a registered tax agent or accountant before purchasing to maximise deductions and avoid compliance issues.
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