Sole-Trader Invoice Examples: Hourly Work and Fixed Fees

If you need a sole-trader invoice for hourly work or a fixed-fee job, the clearest approach is to show what you supplied, when you supplied it, how the amount was calculated, when payment is due, and how the client can pay. The two fictional AUD examples below do that in a format you can adapt for real work.

They focus on the invoice itself rather than broader freelance workflow. If you need a reusable layout, start with a sole-trader invoice template. If you are checking identity fields such as personal name, business name and ABN, see What Business Details Go on a Sole-Trader Invoice?. For the wider invoicing process, see How to Invoice as a Freelancer in Australia.

What these examples need to include

Useful invoice examples are specific enough that a client can verify them quickly. Australian guidance says invoices should clearly identify the seller and buyer, describe what was supplied and show the amount payable. If GST applies, tax-invoice requirements are more specific about identity, date, items, price and GST content, with extra buyer detail for sales of at least A$1000 (Australian government invoicing guidance; ATO tax-invoice guidance).

For a practical sole-trader invoice, include:

• your name and business name if you use one
• your ABN if you have one
• client name and contact details
• invoice number and invoice date
• service date or service period
• line-item scope in plain English
• units and rate, or a fixed fee
• subtotal and total in AUD
• tax wording that matches your actual treatment
• due date
• payment details

Example 1: hourly work invoice in AUD

This format suits work billed by time, where the client expects dates, hours and a rate.

Worked line items

This works because the client can see the service dates, the scope and the calculation without reading a long narrative. For hourly invoices, that can help prevent a common dispute: what exactly was done, and how were the hours counted?

Example 2: fixed-fee invoice in AUD

A fixed-fee invoice is better when the client bought a defined outcome rather than time.

Worked line items

For fixed-fee work, the unit is the deliverable itself. That matters because many clients approve a package, not a number of hours. Specific inclusions also reduce later confusion. “One revision round” is much clearer than “edits included.”

How to show tax without guessing

For this article, the tax illustration excludes GST. That keeps the examples useful without prescribing your tax treatment.

Use wording that reflects the real position rather than guessing:

• No GST included where the supplier is not registered for GST.
• If registered and the supply is taxable, show GST clearly and make sure the document meets tax-invoice requirements.
• Confirm wording and treatment against your actual registration and the supply type.

That distinction matters because ABN registration and GST registration are separate, and GST-free is not the same thing as being unregistered for GST (ATO guidance on when GST registration is needed). If an earlier invoice used the wrong treatment, check the facts and get accounting advice rather than changing the label and assuming the problem is solved.

Wording you can reuse on your own invoice

You do not need legalistic language. Short, accurate wording is usually better.

For hourly work:

Website maintenance completed on 6 May 2026 and 9 May 2026, including content updates, plugin checks and broken-link fixes.

For fixed-fee work:

Fixed-fee content package delivered during 29 July 2026 to 1 August 2026, including drafting, editing and one agreed revision round.

For payment instructions:

Please pay by bank transfer by 28 May 2026 using invoice number INV-1048 as the payment reference.

For tax wording:

GST treatment to reflect actual registration status and supply type. No GST included in this example.

If you want these phrases inside a ready-made layout, use a sole-trader invoice template and replace the example text with the actual job details.

Two edge cases that often cause confusion

Mixed billing on one job

Some projects begin with hourly discovery work and finish with a fixed-fee deliverable. Do not collapse that into one vague line. Split it into separate line items so each part can be checked on its own.

For example:

• discovery: 2.0 hours at the agreed hourly rate
• final deliverable: 1 fixed-fee item

That keeps the invoice readable and makes it easier for the client to approve.

Deposit paid earlier

If the client paid a deposit before the final invoice, show the full project amount and then deduct the deposit as a separate line. Do not hide it inside the description.

Example structure:

• Fixed-fee project: A$1,200.00
• Less deposit received on 15 July 2026: A$300.00
• Balance due: A$900.00

This makes the remaining amount obvious and helps the client match your invoice to actual payment records. If there have been partial payments, check the real payment history before showing a balance due.

If the client wants extra identifiers or support records

In some sectors, clients ask for participant references, service codes, approval notes or session evidence. Keep the invoice itself accurate and include only what you can verify.

A safer approach is:

• participant or client reference: add only if supplied and confirmed by the client
• program or service code: add only after you verify the correct code
• claim rate: add only after you verify the applicable rate
• delivered hours: show the actual delivered hours from your records

If a required identifier is unknown, confirm it before issuing the invoice or leave the field off until it is verified. Your invoice does not replace separate operational records, and it does not by itself prove compliance, entitlement or funding eligibility.

Final check before you send

Before sending the PDF, do one quick pass:

• confirm the invoice date and service date or period are correct
• check that units, rates and totals agree
• make sure the scope is clear to someone who was not involved in the work
• confirm the tax wording matches your actual registration and treatment
• verify the due date, account details and payment reference

That is usually enough to catch the avoidable errors that make sole-trader invoices look unfinished.

Whether you bill by the hour or by a fixed fee, the goal is the same: make the document easy to understand and easy to check. If you want a repeatable starting point, use the sole-trader invoice template and adapt it to the job rather than rebuilding your format every time.