A quote, an invoice and a receipt are three different documents for three different moments in a sale. A quote proposes a price before you start. An invoice asks for payment once the work is done. A receipt confirms the money has landed. Mixing them up confuses clients and muddies your records — so here's exactly what each one does, when to send it, and what it needs to include.
Ready to bill? When you reach the invoice stage, the Australian tax invoice generator lays out every required field, adds GST and downloads a clean PDF — no signup required.
The three documents at a glance
Every sale moves through the same three stages, and each stage has its own paperwork:
- Quote — issued before the work: "Here's what it will cost."
- Invoice — issued after the work (or on delivery): "Here's what you now owe."
- Receipt — issued after payment: "Thanks, this confirms you've paid."
What is a quote?
A quote is a formal offer to supply goods or services at a stated price. The customer uses it to decide whether to go ahead. A fixed-price quote is a firm commitment to the amount shown, so it pays to be precise — if the customer accepts, it can form the basis of a binding agreement. (An estimate is looser: an educated approximation that can move once the job is properly scoped.)
A good quote includes your business name and ABN, the customer's details, a description of the work, the price and any GST, any conditions or exclusions, and — importantly — an expiry date, so an old quote can't be held against you months later. You can produce one in seconds with our free quote generator.
What is an invoice?
An invoice is a request for payment. You issue it once the goods are delivered or the work is complete (or per the milestones you agreed), and it starts the clock on your payment terms. Unlike a quote, an invoice records an amount that is genuinely owed and goes into your accounts receivable.
An invoice should include the word "Invoice" (or "Tax Invoice" if you're registered for GST), a unique invoice number, your details and ABN, the client's details, the issue and due dates, an itemised list of what you're charging for, any GST, the total, and how to pay. Our step-by-step guide on how to write an invoice covers each field in detail, and if you're a sole trader, see how to invoice as a sole trader in Australia.
What is a receipt?
A receipt is proof that payment has been made. It's issued after the customer pays and confirms the transaction is settled. Where an invoice says "please pay," a receipt says "payment received."
In Australia, a business must provide a receipt or other proof of transaction for purchases of $75 or more (excluding GST) if the customer asks, and must give one for any purchase when requested. A receipt typically shows the seller's identity and ABN, the date of payment, what was bought, the amount paid, and the payment method. You can generate one instantly with our free receipt generator.
The quote → invoice → receipt workflow
Put together, the three documents form a simple, repeatable cycle for every job:
- Quote. The customer enquires; you send a quote with a price and an expiry date. They accept.
- Do the work. You deliver the goods or complete the service as agreed.
- Invoice. You send an invoice for the agreed amount, with a due date and payment details.
- Payment. The customer pays by the due date (a polite reminder helps if they don't).
- Receipt. You issue a receipt confirming the payment, closing the loop.
Keeping the three documents distinct — and keeping copies of each — makes your bookkeeping cleaner, your BAS easier, and any dispute far simpler to resolve because you can show exactly what was agreed, billed and paid.
Common mix-ups to avoid
- Sending a quote as if it were an invoice. A quote isn't a demand for payment — label it clearly so a client's accounts team doesn't try to pay it.
- Treating an invoice as a receipt. An invoice requests payment; it doesn't prove one was made. Mark it "Paid" or issue a separate receipt once the money arrives.
- Reusing numbers across document types. Keep separate, sequential numbering so quotes, invoices and receipts never collide in your records.
This article is general information, not financial or tax advice. For rules that apply to your situation, check the ATO and business.gov.au, or speak to a registered tax agent.
Frequently asked questions
What is the difference between an invoice, a quote and a receipt?
A quote is an offer of a price before work begins, an invoice is a request for payment issued once the work is done, and a receipt is proof that the customer has paid. They map to three stages of a sale: agreeing, billing and confirming payment.
Is a quote a legally binding contract?
A quote is an offer to do work at a stated price. If the customer accepts it, it can form the basis of a binding agreement, so quote carefully and note any conditions or an expiry date. An estimate, by contrast, is only an approximate guide and isn't fixed.
Do I need to issue a receipt after payment?
In Australia a business must give a customer a receipt or proof of transaction for purchases of $75 or more (excluding GST) if asked, and for any purchase if the customer requests one. Even when not required, a receipt is good practice and helps both sides keep clean records.
Can one document be both an invoice and a receipt?
Not at the same time. An invoice requests payment; a receipt confirms it was made. If a customer pays on the spot you can mark the invoice as paid or issue a separate receipt, but the two serve different purposes at different moments.