An Australian contractor invoice should identify you and your client, describe the work supplied, show the amount payable and state when payment is due. Use the blank template below as a starting point, adding GST details only where they apply to your business and the supply.
How contractor invoices work in Australia
An invoice is a request for payment for work or services already supplied, or for a stage of work covered by an agreement. Contractors commonly invoice after completing a job, at agreed project milestones, or on a recurring schedule. The contract or work order should explain which approach applies; the invoice records the particular work and amount being claimed.
There is no single government-issued layout that every Australian contractor must use. A clear, consistent invoice can still help both parties check what was supplied, match the charge to the agreement and keep useful business records. If you are registered for GST and making a taxable sale, you may need to provide a tax invoice rather than an ordinary invoice. The distinction matters because a client may rely on a tax invoice when accounting for GST credits.
An invoice template does not decide whether a worker is legally a contractor or an employee. That depends on the actual working arrangement and other relevant factors, not simply on whether someone sends invoices or has an ABN.
What an Australian contractor invoice should contain
Include enough information for the client to identify the supplier, understand the work and pay the correct amount. A practical invoice usually contains:
- Your business or trading name, contact details and ABN, if you have one.
- The client’s name and, where useful, their business or project address.
- A unique invoice number and the date the invoice was issued.
- A description of the work, service period or project milestone being billed.
- Line-item amounts, any agreed expenses or discounts, and the total payable.
- GST information where relevant, plus the amount and due date.
- Payment instructions, such as bank transfer details or another accepted method.
Use a description specific enough to connect the charge to the agreement. For example, “Electrical work, second-floor fit-out, 1–15 October” is more useful than “labour”. If you bill by time, show the hours, rate and period. If the price is fixed, identify the deliverable or milestone instead. An invoice should reflect the agreed price; it is not a substitute for approval of extra work.
Australian contractor invoice template
Blank contractor invoice
| Field | Details |
|---|---|
| Supplier name and business name | ____________________________ |
| Supplier address, email and phone | ____________________________ |
| ABN, if applicable | ____________________________ |
| Client name and address | ____________________________ |
| Invoice number | ____________________________ |
| Issue date | ____________________________ |
| Payment due date | ____________________________ |
| Project or purchase order reference | ____________________________ |
| Description of work or service | Period or quantity | Rate or amount | Line total |
|---|---|---|---|
| ________________ | ________________ | ________________ | ________________ |
| ________________ | ________________ | ________________ | ________________ |
| ________________ | ________________ | ________________ | ________________ |
| Amount summary | Amount |
|---|---|
| Subtotal | ________________ |
| GST, if applicable | ________________ |
| Other agreed charges or discount | ________________ |
| Total payable | ________________ |
| Payment method and instructions | ____________________________ |
| Notes or terms agreed with client | ____________________________ |
Sample only — fictional details: Harbourline Carpentry, ABN 12 345 678 901; invoice HC-024; issued 3 November 2026; client North Quay Fit-out; work: “Install internal doors, stage 2”; amount before GST $1,000.00; GST $100.00; total payable $1,100.00; due 17 November 2026. These details are illustrative, not a claim about a real business or transaction.
GST and tax invoice requirements
Only charge GST when you are registered for GST and the supply is taxable. GST registration is generally required when an entity’s GST turnover reaches the applicable registration threshold; turnover is not the same as profit. Some supplies may be GST-free or input taxed, so it is not safe to assume that every service attracts GST. Check current Australian Taxation Office guidance for your circumstances.
If you are not registered for GST, do not add a GST amount or describe the document as a tax invoice. If you are registered, a tax invoice for a taxable sale should show the words “tax invoice”, the supplier’s identity and ABN, the date, a description of the items or services, the price, and the GST amount or a clear statement that the total includes GST. The invoice should also make clear which items are taxable if the invoice includes items with different GST treatment.
For taxable sales of $82.50 or more, including GST, a client generally needs a tax invoice to claim a GST credit. For sales of $1,000 or more, the buyer’s identity or ABN must also appear on the tax invoice. A registered supplier is generally required to provide a tax invoice within 28 days after a request. These are important general rules, but exceptions and particular transaction types can affect the result.
How to prepare and number an invoice
Before sending an invoice, compare it with the contract, accepted quote, purchase order or approved variation. Confirm that the billed stage is complete, the hours or quantities are correct and any reimbursable expenses were agreed. A short checking routine can catch errors before they delay payment:
- Enter the client’s correct legal or business name and the relevant project reference.
- Describe the work and service period in terms the client can recognise.
- Check calculations, GST treatment and the total against the agreed price.
- Add the due date and payment instructions, then save a copy of the final invoice.
- Send it to the contact or accounts address specified by the client and retain evidence of sending.
Use a numbering method that makes each invoice easy to identify and avoids accidental duplicates. A sequence such as 2026-001, 2026-002 and 2026-003 is one possible system; a business may choose another sensible format. Keep numbering consistent across invoices and record any cancelled or corrected invoice so your files explain the sequence. If you issue a correction, identify the original invoice and clearly state what has changed rather than silently replacing a document the client may already have recorded.
Payment terms, due dates and expenses
State a specific due date, not just “payment due soon”. The due date should follow the terms agreed with the client. For example, if the agreement says payment is due 14 days after the invoice date, an invoice issued on 3 November can state a due date of 17 November. That example is only a calendar illustration; it does not set a standard payment period for Australian contractors.
List expenses separately when that makes them easier to verify. Identify what the expense was for and, where appropriate, include the date or attach a receipt. Check whether the agreement allows the expense and whether the quoted amount is inclusive or exclusive of GST. Avoid adding an administration fee, late fee or other charge unless the client agreed to it or there is another proper basis for charging it.
Make payment instructions clear and secure. Include the account name and details needed for a transfer, and tell the client how to contact you if an account detail appears incorrect. Because invoice fraud can involve substituted bank details, clients should verify any unexpected change through a trusted contact method rather than relying only on a new email or message.
Common invoice problems to avoid
Small omissions can create a long payment delay, particularly when a client’s accounts team needs a purchase order or specific project code. Before sending, check for these common issues:
- A vague work description that the client cannot match to a quote or completed milestone.
- A missing purchase order number, site reference, timesheet or required supporting document.
- A wrong client entity, invoice date, calculation, bank detail or payment due date.
- GST charged by a supplier who is not registered, or GST added to a supply without checking its treatment.
- A duplicate invoice number or a revised invoice that does not explain what it replaces.
- Expenses or extra work billed without the approval required by the agreement.
Ask the client about its invoice submission process before the first billing date. Some clients require invoices to go to a particular address or include a specified reference. If a payment is late, check first that the invoice was received and accepted, then refer to the agreed terms and follow up in writing. Keep the tone factual: identify the invoice number, original due date, amount outstanding and any action needed from the client.
Contractors working on construction projects should pay particular attention to project-specific payment claim rules. Requirements can depend on the type of work and the relevant state or territory, and an ordinary invoice may not satisfy every formal requirement for a statutory payment claim. If your situation requires legal, tax or financial advice, ask a qualified professional.
Keeping invoice and payment records
Keep the invoice together with the quote or contract, approved variations, relevant timesheets or delivery records, receipts, correspondence about disputed items, and proof of payment. This makes it easier to explain how an amount was calculated and to reconcile what remains unpaid. A simple register can record the invoice number, client, issue date, due date, total and payment status.
Australian businesses generally need to keep records that explain their tax and business transactions for the periods required by law. The precise retention period can depend on the record and the rules that apply, so check current ATO information rather than treating an invoice template as a record-keeping policy. Store documents so they can be retrieved, backed up and kept private; avoid leaving client details or payment information in public or shared locations without suitable access controls.
Frequently Asked Questions
Can I invoice a client without an ABN?
It is possible to issue an invoice without displaying an ABN, but a business payer may have to withhold tax from a payment if you do not quote an ABN, unless an exception applies. An ABN is not proof by itself that a person is a contractor. Check the ATO’s current rules if you are unsure what applies to a payment.
Do I need to register for GST before adding GST to an invoice?
Yes. You should not charge GST unless you are registered for GST and the sale is taxable. If you are not registered, issue an ordinary invoice without a GST charge or tax-invoice label. Registration thresholds and supply treatment can depend on your circumstances.
Does an invoice have to include a payment due date?
A due date is useful and helps make the agreed payment timing clear, although the applicable terms may come from your contract or another agreement. State an actual date and ensure it matches those terms rather than assuming one standard period applies to every client.
Can I use this template for a construction payment claim?
It can help organise invoice details, but it may not meet formal payment-claim requirements for a particular construction project. State and territory rules and project circumstances can matter, so check the applicable requirements before relying on a generic invoice as a claim.
What should I do if I sent an invoice with a mistake?
Contact the client promptly, explain the error and send a clearly identified corrected document. Refer to the original invoice number and make it clear whether the replacement supersedes it or is an adjustment, so both parties can keep matching records and avoid paying twice.