Business Vehicle Records: Build a Logbook and Expense File

If vehicle expenses are scattered between a phone app, fuel receipts and a finance account, start with an index. This guide helps an owner gather the facts for a method check; it does not choose a vehicle deduction method.

Identify the vehicle before entering journeys

Record the registration, make, model, engine capacity, acquisition date and legal owner. Add the purchase invoice, loan or lease agreement and any replacement-vehicle details. Don't assume the name on a bank account establishes who owns the vehicle.

The ATO's calculation-method guide distinguishes business structures and vehicle types. Save the method decision and its date with the file so a future bookkeeper knows which records the owner was gathering.

Record the actual route, including interruptions

Use meaningful purposes such as “repair pump at customer J61” rather than “business”. Record the start and finish dates, readings and kilometres. Keep private errands visible and flag mixed journeys that need a decision.

Use the odometer difference to check for recording errors, while keeping the trip purpose as a separate question. If a reading is missing, say so and identify any dated photograph or service record used to reconstruct it; don't insert a number merely to make the sheet balance.

Index costs without treating the bank feed as the invoice

Keep fuel, servicing, repairs, registration and insurance evidence in the same vehicle folder. Link each payment to the source document and note refunds or reimbursements. Separate finance documents from running costs rather than treating every loan payment as the same kind of expense.

The ATO's vehicle record list is the starting checklist. Its logbook guidance sets out the additional requirements where that method applies. Check the required period and ongoing readings against that guidance before calling your file complete.

Record changes before copying last year's approach

A new customer route, another driver, a replacement car or a move to different premises can change the evidence. Date the change and ask whether the existing method and records still fit.

For a missing servicing invoice, use the lost receipt workflow. Put the vehicle's purchase and eventual disposal in the asset register, while keeping the full journey file alongside it.

Key takeaways

• Identify the vehicle, owner and relevant claim method before relying on a log.
• Make odometer movements reconcile, including private travel.
• Keep the expense documents and changes in use with the journeys.

Where to get help

Ask a registered tax agent to assess the applicable method, mixed journeys and private use. Use the tax records hub to organise the rest of the supporting file.