MechAxis feature
GST tax invoice software for Australian mechanics and workshops
Workshop invoicing and payments for Australian businesses
Prepare quotes, invoice completed work and record payments. Set GST per line and track partial payments, cash, card, EFTPOS and bank transfers.

MechAxis shown with demonstration workshop data.
How the day runs
What you can do
Edit descriptions without rebuilding invoice lines
Track the amount paid and the balance still owing
Australian totals by default
When a line uses 10% GST, the entered unit price is treated as GST inclusive. MechAxis calculates the GST component and ex-GST total for the document.
Payments that match the counter
Record cash, card, EFTPOS, bank transfer, cheque or another method. Paid invoices remain editable by authorised workshop staff.
A customer copy that reads properly
Workshop details, customer and vehicle information, line descriptions, GST and payment status appear in a clean printable document.
Questions
Questions workshops ask
01Are prices entered including GST?+
Yes. MechAxis follows the common Australian workshop convention: the unit price is GST inclusive and the GST component is calculated from it.
02Can we edit an invoice after payment?+
Authorised workshop administrators can correct a paid invoice while the payment record and audit history remain visible.
03Which payment methods can we report on?+
Cash, card, EFTPOS, bank transfer, cheque and other payments can be recorded and compared on the dashboard.
30-day trial
Create an invoice from completed work
30 days. No card required. Compare plans for feature availability after the trial.
Take a Zeller EFTPOS payment from the workshop invoice
At collection, the service team can send the payment amount from a MechAxis invoice to a paired Zeller terminal. The approved payment stays connected to the invoice.
Review the completed work and amount owing
Check the customer, vehicle, parts, labour and GST before taking payment. Review any payments already recorded so the amount being collected matches what the customer still owes.
Send the payment to the paired terminal
Choose the connected Zeller terminal from the invoice payment flow and send the amount. The customer pays at the terminal. Your workshop uses its own Zeller account and rates.
Confirm the payment result on the invoice
An approved terminal payment is recorded against the invoice and its payment status updates. Check the result before completing collection. If the outcome is unclear, resolve the payment status before starting another charge or adding a manual payment.
Check your payment setup before changeover
Integrated Zeller EFTPOS is available on every MechAxis plan and requires a connected Zeller account and paired terminal. Cash and bank-transfer payments can also be recorded. Confirm your terminal setup and provider terms with the team before changing your counter workflow.
Read the guide to workshop invoicesIn use at NP Motors, Enfield
NP Motors reports at least 30% less admin time over three months using MechAxis. Follow Niroj and the team's workflow from online booking to tablet inspection and Zeller payment.
See how NP Motors uses MechAxis