A sole trader invoice should give your client all the information needed to identify the work, confirm the amount owed and complete the payment.
Missing or unclear information can delay approval, create unnecessary questions and make your business appear disorganised. A consistent invoice format helps both you and your clients maintain accurate records.
Your name or business name
Include the name you use to operate your business. This may be:
- Your full personal name
- Your registered business name
- Your personal name and registered business name
The client should be able to recognise the person or business that provided the service. Use the same name consistently across your quotes, invoices, contracts and payment account where possible.
Your ABN
Include your Australian Business Number on the invoice. The ABN identifies your business and allows the client to confirm your registration details.
Place it near your name or business details so it can be found easily. You can format it as:
ABN: 12 345 678 901
Your contact details
Provide a way for the client to contact you about the invoice. This may include:
- Email address
- Phone number
- Business address
- Website
You may not need to display every contact method, but include at least one reliable option.
The client’s details
Identify the person or business responsible for paying the invoice. Include the client’s business name, contact name and billing address where available.
For larger organisations, confirm whether the invoice also needs:
- A purchase order number
- A project code
- A department name
- A specific billing email address
- The name of the person who approved the work
Missing internal reference details can cause an invoice to be rejected or delayed.
A unique invoice number
Every invoice should have a unique identifying number. This helps you and the client refer to the correct document.
A straightforward sequence such as INV-001, INV-002 and INV-003 is suitable for many sole traders.
Do not assign the same number to multiple invoices. If you cancel or replace an invoice, retain a record of the original number.
The invoice date
Show the date the invoice was issued. This date may be used to calculate the payment due date, particularly when your terms specify payment within a certain number of days.
Do not rely only on the date the work was completed. The invoice issue date should be clearly labelled.
A description of the work
Describe the product or service in enough detail for the client to recognise what they are paying for.
For example:
- Logo design and final artwork files
- Consulting services for July 2026
- Website maintenance for three months
- Electrical repair completed at Smith Street property
- Final 50 per cent payment for photography package
Break the work into separate line items when this makes the invoice easier to understand.
Quantity, rate and line total
Show how each charge was calculated. Depending on your work, this could include:
- Hours multiplied by an hourly rate
- Days multiplied by a daily rate
- Number of products multiplied by the unit price
- A fixed project or milestone fee
Clearly display any agreed discounts, reimbursable expenses or additional charges.
GST details
Your GST details depend on your registration status.
If you are registered for GST, label the document Tax Invoice and include the required GST information. Show the GST amount separately or state that the total price includes GST where this provides enough information to calculate it.
If you are not registered for GST, use the title Invoice and do not add GST. You may include a note stating that you are not registered for GST.
The total amount due
Make the final amount prominent and easy to find. If you are registered for GST, clearly distinguish between:
- Subtotal before GST
- GST amount
- Total including GST
If a deposit or previous payment has already been received, show the original amount, payment received and remaining balance.
The payment due date
Include a specific date by which payment must be made.
For example:
Payment due: 27 July 2026
You can also show the payment term, such as 14 days, but a calendar date is clearer and reduces the chance of disagreement.
Payment instructions
Tell the client exactly how to pay you. For bank transfer, provide:
- Account name
- BSB
- Account number
- Requested payment reference
If you accept card or online payments, include the relevant payment link or instructions.
Payment terms and conditions
You may also include brief terms covering:
- Deposits
- Progress payments
- Late payment fees
- Cancellation fees
- Ownership of work before payment
Important conditions should be agreed before the work begins, not introduced for the first time on the final invoice.
A professional sole trader invoice checklist
Before sending an invoice, check that:
- Your business details and ABN are correct
- The client details are accurate
- The invoice number is unique
- The work is clearly described
- The totals have been calculated correctly
- The GST treatment is correct
- The payment due date is visible
- The payment instructions are complete
Using a consistent invoice template or invoicing system reduces the risk of missing important information and makes it easier to track payments across your sole trader business.
