GST, ABNs and Corporate Invoicing for Australian Hire Car Operators

An Australian corporate client's AP team is looking for specific things before they process anything: your business name and ABN, the invoice date and number, a clear description of what was supplied, the GST treatment and the total payable. If any of those are missing or ambiguous the invoice goes into a query queue, and your payment terms quietly become 60 days instead of 30.

Set this up once in your invoice template rather than correcting it per invoice. In Kymark that lives in billing and invoicing.

Trips, waiting time, tolls, parking, airport fees and driver gratuities don't all behave the same way, and deciding their treatment while you're issuing an invoice is how inconsistencies creep in. Configure GST against each rate and extra when you set up your pricing, so every job inherits the correct treatment automatically and your reporting stays reconcilable. If you're unsure how a particular charge should be treated, confirm it with your accountant — it's a one-time decision that then applies to thousands of jobs.

Retail and wedding clients want to hear one number, GST inclusive. Corporate clients want the breakdown. The workable answer is to quote a single inclusive figure while the underlying job still carries itemised lines, so the invoice can show base fare, waiting, tolls and GST separately without you re-entering anything.

Almost every Australian corporate account eventually asks for the same thing: one invoice a month covering every trip, with each line carrying the passenger, date, route and their internal cost centre or client code. Doing that by hand is a spreadsheet job that grows with your fleet.

The requirements to look for in software are:

• A cost centre or client code field captured at booking, not added later
• Batch invoicing that rolls a month of jobs into one statement per account
• Account-level rates so a negotiated corporate price applies automatically
• Per-passenger or per-department subtotals when a client asks for them

Capture the code at booking and the statement builds itself. Capture it after the fact and someone spends month-end chasing thirty drivers for context.

Event work is the other half of the billing picture. A non-refundable deposit at booking, a package rate rather than per-kilometre, and a clear balance-due date prevents the two classic losses: the cancellation that leaves a Saturday vehicle idle, and the "we thought that was included" conversation on the day.

Once invoicing is automated, the only remaining leak is unpaid invoices nobody is watching. A weekly look at what's outstanding by account, with the oldest first, catches the slow payer at 45 days rather than 120. Reporting and analytics covers revenue, utilisation and per-vehicle profitability alongside it, which is also where you'll notice an account whose negotiated rate has stopped being worth servicing.

You export one statement per corporate account, each line already coded, GST already correct, deposits already applied — and you spend the time you saved on the accounts that haven't paid. That's an achievable target for a fleet of any size once the setup is right.

Kymark bills in AUD with GST handling, ABN-carrying tax invoices, account-level pricing and consolidated monthly statements. See the Australia overview, Sydney, Melbourne or Brisbane pages, compare pricing, or start a free trial.

Related reading: Hire Car Software in Australia · Airport Transfers in Australia · Kymark launches in Australia · Contact us.