Invoicing as a sole trader in Australia doesn't need to be complicated, but getting it wrong can delay payments and create headaches at tax time. This guide walks you through exactly what to include on your invoices, when to charge GST, and practical tips to get paid on time every time.

As a sole trader, your invoice is both your payment request and your legal document. Whether you are a freelance designer, a plumber, a copywriter, or a personal trainer, the basics are the same — but the details depend on whether you are registered for GST.

Step 1: Know your GST status

The single most important thing that determines what goes on your invoice is whether your business is registered for the Goods and Services Tax (GST). The rule is straightforward:

If your annual turnover is under $75,000, GST registration is optional.
If your annual turnover is $75,000 or more, you must register for GST.
Once registered, you must charge 10% GST on all taxable services and use the heading "Tax Invoice".

Not sure if you should register? The ATO's GST registration guidance walks you through the decision. Many sole traders voluntarily register for GST early to claim input tax credits on business expenses such as equipment and software.

Step 2: What must every sole trader invoice include?

Every invoice you issue as a sole trader should include these core fields, regardless of your GST status:

Your business name and ABN — Your 11-digit Australian Business Number must appear on every invoice. If you have not yet applied for an ABN, you can do so for free through the Australian Business Register.
Date of the invoice — Important for payment terms and for your BAS if GST-registered.
A unique invoice number — Sequential numbering keeps your records organised and makes following up on unpaid invoices easy.
Description of services or goods — Be specific. "Web design — homepage wireframes" is more useful than "Design work".
Amount due — Clearly state the total. If not GST-registered, this is the total price. If GST-registered, show the subtotal, GST amount, and grand total separately.
Payment details — Your BSB and account number, or other accepted payment methods.
Payment terms — When the invoice is due (e.g., "Payment due within 14 days").

Step 3: Adding GST to your invoice (if registered)

If you are GST-registered, the ATO requires you to label your document "Tax Invoice" and include additional details:

The heading "Tax Invoice" must appear prominently.
The GST amount must be shown separately, or you must state "Total price includes GST of [amount]".
For invoices over $1,000 (GST-inclusive), you must also include the buyer's name or ABN.

Our free invoice generator handles all of this automatically — just toggle the GST option on or off depending on your registration status.

Step 4: Invoicing without GST (below $75k threshold)

If you are not GST-registered, your invoicing is simpler. You do not need to title the document "Tax Invoice" — use "Invoice" instead. You should not include a GST line. Simply list your service, the total amount charged, and your payment details. Your ABN should still appear on every invoice.

Some clients — particularly government agencies or larger businesses — may ask why there is no GST. Simply explain that your business is not registered for GST because your annual turnover is below the $75,000 threshold. This is completely normal and legal.

Step 5: How to set payment terms that get you paid faster

Payment terms are one of the most overlooked parts of the invoicing process for sole traders. Research consistently shows that invoices with a specific due date are paid faster than those with vague terms like "payment on receipt". Consider these practices:

Shorten your payment terms: Net 14 days is typically better for sole traders than Net 30. The sooner the due date, the sooner you are paid on average.
Invoice immediately: Send your invoice the day the work is completed, not at the end of the month.
Follow up early: A polite reminder 2 days before the due date catches most slow payers before the invoice becomes overdue.
Include your payment details prominently: Make it as easy as possible for the client to pay you. List your BSB and account number, and consider mentioning if you accept bank transfer, PayPal, or other methods.

For a detailed breakdown of Net 14, Net 30, late fees, and chasing overdue invoices, see our Invoice Payment Terms Guide for Australian Businesses.

Step 6: Keeping records for tax time

As a sole trader, you are required to keep records of all your invoices for at least five years. The ATO may request to see them during a review. Keeping a folder (digital or physical) of each invoice you issue and each invoice you pay is the minimum required. Good record-keeping also makes preparing your annual tax return much faster.

If you are GST-registered, you will also need your invoices to prepare your Business Activity Statement (BAS) — typically lodged quarterly or monthly.

Sole trader invoice checklist

Before sending your next invoice, tick off this list:

✅ Business name and ABN visible
✅ Correct date and a unique invoice number
✅ Clear description of every service or product
✅ "Tax Invoice" heading (GST-registered only)
✅ GST calculated at 10% and shown separately (GST-registered only)
✅ Total amount due clearly visible
✅ BSB, account number, and payment terms included
✅ Client name and address correct

How to Invoice as a Sole Trader in Australia