Fuel Logbook (ATO)

What Is a Fuel Logbook (ATO)?

A Fuel Logbook is a record used to track the distance travelled by a vehicle for work purposes versus personal use. In the context of Australian tax and business compliance, this document is essential for anyone claiming vehicle expenses. The Australian Taxation Office (ATO) requires evidence to support a claim for a tax deduction. You cannot simply guess or estimate your business driving.

The logbook serves as the primary evidence for the "logbook method" of claiming car expenses. This method often results in a higher tax deduction than the cents per kilometre method because it accounts for the actual running costs of the vehicle. It is important to understand that while people call it a "fuel" logbook, it actually records every journey. The data collected allows you to calculate a business use percentage. This percentage is then applied to total vehicle running costs, which include fuel, oil, repairs, registration, insurance, and depreciation.

For business owners, the document is also a critical tool for Fringe Benefits Tax (FBT). If an employer provides a car for an employee's private use, they must keep a logbook to calculate the taxable value of that benefit.

When to Use This Document

You should use this document if you own a vehicle and use it for work, and you want to claim your expenses beyond the set cents per kilometre rate. The logbook method is mandatory if your total business kilometres exceed 5,000 per year, though many choose it voluntarily even for lower volumes to maximise deductions.

Specifically, you need this document in the following scenarios:

Maximising Tax Deductions If you are a sole trader, partnership, or company claiming vehicle expenses, the logbook method allows you to claim the actual business portion of your expenses. This is particularly useful for tradespeople, sales representatives, and real estate agents who spend significant time on the road.

Fringe Benefits Tax (FBT) Compliance If your business provides vehicles to employees for private use, you are liable for FBT. To reduce this liability using the "Operating Cost Method," you must have a valid logbook showing the percentage of business use.

Reimbursement Claims Under the Fair Work Act 2009 (Cth) and relevant modern awards, employees may be entitled to a vehicle allowance. However, to claim reimbursement for actual costs rather than just a standard rate, accurate records are required. A logbook provides the proof an employee needs to show their employer exactly how much work-related driving was done.

Changing Work Circumstances You must start a new logbook if your work circumstances change. This includes buying a new car, changing your job, or significantly altering the way you use your vehicle for work. If the business use of your car changes substantially, your old logbook percentage will no longer be considered accurate by the ATO.

Key Sections and Required Elements

The ATO does not provide a mandatory template, but they do have strict requirements for what must be recorded. If your document is missing these elements, the ATO may reject your claim. The regulations specify that the logbook must be kept for a continuous 12-week period.

Vehicle Details The document must clearly identify the car. You need to record the make, model, year, and registration number. It is also best practice to include the engine number for asset identification purposes. This links the logbook to the specific asset in your accounting records.

The 12-Week Period You must define the start and end dates of the 12-week recording period. This period must be representative of your usual travel throughout the year. For example, it should not be a period of annual leave where the car sits idle.

Odometer Readings There are three critical odometer readings you must capture:

1. The odometer reading at the start of the 12-week period.
2. The odometer reading at the end of the 12-week period.
3. The odometer reading at the start and end of every individual journey.

Journey Details For every single trip made during the 12 weeks, you must record:

• Date: The day of the travel.
• Start and End Time: This helps prove the journey took place.
• Kilometres Travelled: The distance between the start and end point.
• Reason for the Journey: A description of why the travel was necessary for income-producing activities.

Business Use Percentage At the end of the 12 weeks, you will calculate the total kilometres travelled and the total business kilometres travelled. The formula is simple: (Total Business Km / Total Km) × 100 = Business Use Percentage. This figure is valid for five years, provided your usage pattern does not change.

How to Write a Fuel Logbook (ATO) (Step by Step)

Getting the most out of your vehicle claims requires a disciplined approach to record-keeping. Follow these steps to create a compliant and useful logbook.

Step 1: Choose Your Recording Period

Select a 12-week period that is typical of your work. If you are a retailer, do not choose a period over Christmas if your trading hours or delivery routes change drastically. If you are a builder, choose a time when you are working on-site regularly. The ATO requires the period to be continuous.

Step 2: Prepare Your Document or App

Decide whether you will use a paper diary, a spreadsheet, or a digital app. While paper is acceptable, digital records are often easier to manage. If you employ staff and are tracking their movements, ensure your chosen method complies with the Privacy Act 1988 (Cth), particularly regarding the collection of personal location data.

Step 3: Record Opening Odometer

On day one, record the car's odometer reading first thing in the morning. Ensure you include the date. This figure is non-negotiable for the validity of the logbook.

Step 4: Log Every Trip

This is where most people fail. You must record every trip. It does not matter if it is a 2km drive to the post office or a 200km drive to a client site. If you use the car for personal reasons, such as picking up kids from school, you must record that too.

For Business Trips: Be specific. "Visit client" is acceptable, but "Client meeting at Smith Constructions, Parramatta" is better. This specificity helps if the ATO reviews the log. For Personal Trips: Write "Private" or "Personal." You need these records to get the total distance correct, even though you cannot claim them.

Step 5: Calculate Totals

At the end of the 12 weeks, add up the total kilometres travelled during the period. Then, add up the kilometres that were strictly for business. Divide the business total by the overall total to get your percentage.

Step 6: Apply the Percentage

Keep the logbook safe. You do not need to keep a logbook every year. This percentage establishes your business use claim for the next five income years. When you lodge your tax return, you will gather all your receipts for fuel, servicing, insurance, and registration. You then multiply the total of these expenses by your business use percentage to find your claimable amount.

Common Mistakes to Avoid

Failing to Record Private Trips A common error is only recording work trips. The ATO requires the logbook to show the total usage of the vehicle. If you only list business trips, the ATO will assume the vehicle was used 100% for business. If you cannot prove this (e.g., you commute from home to work daily), they will disallow your claim. You must record the private travel to prove the business percentage is accurate.

Waiting Until the End of the Week ATO Ruling TR 98/20 states that a logbook must be made at the time of the travel or shortly after. Reconstructing a logbook at the end of the month or the end of the financial year is not acceptable. If the ATO audits you and finds your entries were not made contemporaneously, they will reject the logbook.

Mixing Up Home to Work Travel Generally, travel from your home to your regular place of work is considered private travel and is not deductible. Many tradies make the mistake of labelling their daily commute as "travel to work site" to claim a deduction. If you have a regular depot or office you visit first, that trip is private. However, if you travel from home directly to a client's site, that trip is usually deductible. Ensure your logbook descriptions accurately reflect the destination to support your claim.

Inconsistent Odometer Records Ensure the math adds up. The sum of the individual trip kilometres should roughly equal the difference between the opening and closing odometer readings for the period. If there is a large discrepancy, the ATO may question the accuracy of the entire document.

Legal Considerations (AU)

Income Tax Assessment Act 1997 Under Section 8-1 of this Act, you can claim deductions for losses or outgoing necessarily incurred in gaining or producing your income. The fuel logbook is the evidence that proves your vehicle expenses were "necessarily incurred" for business purposes. Without it, the ATO limits you to the cents per kilometre method, which has an upper cap.

Record Keeping Requirements The Income Tax Assessment Regulations 1997 mandate that you must keep your logbook for five years. It must be in English (or a form easily translatable) and readily accessible if requested. While digital formats are acceptable, you must be able to produce the data in a readable format.

Fringe Benefits Tax Assessment Act 1986 If you are a business owner providing a car to an employee, you must understand FBT. The Operating Cost Method is often the most beneficial way to calculate FBT, but it relies entirely on the logbook. If you do not maintain a valid logbook, you may be forced to use the Statutory Formula Method, which can result in a higher FBT liability.

Work Health and Safety (WHS) Under the WHS Act, a Person Conducting a Business or Undertaking (PCBU) has a duty of care to ensure the safety of workers. While a logbook is not a direct WHS requirement, accurate mileage records help you monitor vehicle maintenance schedules. If a vehicle is involved in an accident, records showing it was regularly serviced and driven for reasonable distances can be part of your due diligence defence.

Privacy Obligations If you use GPS or an app to track employee movements for logbook purposes, you must consider the Privacy Act 1988 (Cth). Small businesses with an annual turnover of more than $3 million must comply with the Australian Privacy Principles. Even smaller businesses may be captured if they collect sensitive information. You must notify employees that you are collecting their location data and explain why it is necessary.

Payroll Tax and State Rules While the logbook format is federally standardised for tax, states have different rules regarding payroll tax and vehicle registration reimbursements. Ensure your logbook data is detailed enough to satisfy specific state revenue office requirements if you are claiming exemptions or rebates.

Frequently Asked Questions

Do I need to keep fuel receipts if I have a logbook? Yes. The logbook only calculates the percentage of business use. You still need to keep receipts (or other evidence of expenses) for fuel, servicing, insurance, and registration to prove the total amount you spent.

Can I keep a digital logbook on my phone? Yes, digital logbooks are acceptable. Apps that use GPS to track trips are popular. However, you must be able to edit the "reason" for the trip. A GPS trail alone does not prove the trip was for business; you must add the narrative context.

How often do I need to update the logbook? You generally only need to keep the logbook for a continuous 12-week period once every five years. However, if you change jobs, buy a new car, or your business driving pattern changes significantly, you must start a new 12-week logbook.

What happens if I lose my logbook? If you lose your logbook, the ATO will not accept a reconstructed version. You will need to start a new 12-week recording period immediately. In the meantime, you may have to rely on the cents per kilometre method for the current year, which might result in a lower deduction.