How to Invoice as a Contractor in Australia

Contractor Invoicing in Australia

If you work as an independent contractor, subcontractor, or consultant in Australia, you issue invoices to your clients (or to the head contractor) for the work you perform. Unlike employees, contractors are responsible for their own invoicing, tax, and superannuation arrangements.

Getting your invoices right is important for two reasons:

1. Payment — a clear, complete invoice gets you paid faster
2. Compliance — the ATO uses contractor invoices to cross-check income declarations, particularly through the Taxable Payments Annual Report (TPAR)

What to Include on a Contractor Invoice

Your contractor invoice should contain the following:

1. Document heading — "Tax Invoice" if GST-registered, or "Invoice" if not
2. Your business or trading name
3. Your ABN — essential to avoid 47% no-ABN withholding
4. Your contact details — address, email, phone number
5. The client's name and address (or the head contractor's details if you are a subcontractor)
6. A unique invoice number and the invoice date
7. A detailed description of work performed — dates, site location, and scope of work
8. Hours worked or day rate, quantities, and unit prices
9. GST amount (if registered) — shown separately or as a total-inclusive statement
10. The total amount due
11. Payment terms — e.g. Net 14, Net 30, or due on receipt
12. Bank details — BSB, account number, and account name

For Subcontractors

If you are a subcontractor invoicing a head contractor, also consider including:

• The project name or site address to help the head contractor allocate costs
• A purchase order number if one was provided
• Retention details if a percentage of payment is held until project completion

ABN and the No-ABN Withholding Rules

Your ABN is critical on every contractor invoice. Under ATO rules, if you do not quote an ABN:

• The payer must withhold 47% of the payment amount
• The withheld amount is sent to the ATO on your behalf
• You can only recover it when you lodge your tax return

This creates cash-flow problems and administrative headaches for both parties. Always include your ABN on every invoice.

GST for Contractors

The GST rules for contractors are the same as for any other business:

If you are GST-registered, your contractor invoice becomes a tax invoice and must include all the additional ATO requirements — the words "Tax Invoice", the GST amount, and buyer details for invoices over $1,000.

The Taxable Payments Annual Report (TPAR)

If you work as a contractor in certain industries, the business paying you is required to lodge a TPAR with the ATO. This report details all payments made to contractors during the financial year. The relevant industries are:

• Building and construction
• Cleaning
• Courier and delivery
• Information technology
• Security, investigation, and surveillance
• Road freight
• Mixed services (if 10% or more of income comes from the above)

As a contractor, your role is to ensure your invoices are accurate and include your ABN. The TPAR is lodged by the business paying you, but the data comes from your invoices.

Contractor vs Consultant Invoicing

Consultants — whether in management, IT, marketing, or any other field — are contractors in the eyes of the ATO. The invoicing requirements are identical:

• Include your ABN
• Describe the consulting services provided
• Charge GST if registered
• Provide clear payment terms

The only practical difference is that consultants often bill by project milestone or deliverable rather than by the hour or day. Structure your line items accordingly.

Example: Contractor Invoice

Common Contractor Invoicing Mistakes

• Missing ABN — the single most common problem, triggering 47% withholding
• Vague work descriptions — "Labour" is not enough; specify the work, dates, and location
• Incorrect GST status — charging GST when not registered, or not charging when you should
• No purchase order reference — many head contractors require a PO number; missing it delays payment
• Inconsistent details — ensure your business name and ABN match your ATO registration exactly

Create Your Contractor Invoice

Our Australian contractor invoice generator includes all the fields you need — ABN, GST calculation, project details, and bank information — and produces a professional PDF ready to send to your client or head contractor.