Quick answer
As an Australian freelancer, your invoice needs your ABN, business name, a unique invoice number, project or milestone reference, line items with quantity and rate, GST if you’re registered, payment terms, and your bank details. Most freelancers run one of three billing patterns: fixed-fee with milestones, hourly with timesheets, or monthly retainer. Pick the right one for the engagement and invoice on the agreed cadence.
The three freelance billing patterns
The single most important decision is how you bill, not what your rate is. Each pattern has a different invoice rhythm:
- Fixed-fee with milestones. Best for defined projects (a website, a brand identity, a launch campaign). The total fee is split into 2–4 milestones, each invoiced when its deliverable lands. Lowest dispute risk because every invoice maps to something concrete the client has received.
- Hourly with timesheets. Best for open-ended or evolving work (ongoing consulting, support, exploration). You invoice weekly or fortnightly with a timesheet attached. Requires discipline on time tracking and a clear hourly rate.
- Monthly retainer. Best for long-term relationships with predictable scope (a marketing retainer, a tech support retainer, a writing retainer). Same amount invoiced on the first of every month. Lowest admin once set up.
You can absolutely mix patterns across clients — many freelancers run two retainer clients, a milestone project, and a couple of small hourly engagements at the same time.
Step 1: Get the ABN side sorted
Before any invoice goes out, you need an ABN. Without one, the client must withhold 47% of the payment under the ATO’s no-ABN withholding rule — that’s $940 out of a $2,000 invoice held back until tax time. ABNs are free at abr.gov.au. Full details in do you need an ABN to invoice?
Step 2: Decide on GST
GST registration is mandatory once your turnover hits $75,000 in any rolling 12-month period. Below that, registration is optional. Most freelancers stay unregistered until they hit the threshold — less admin, no quarterly BAS, simpler invoices.
- How to add GST to an invoice walks through the calculation, wording, and rounding.
- How to invoice without GST covers what under-threshold freelancers must and must not put on the invoice.
Step 3: Structure a milestone invoice
For a $6,000 website build, a typical milestone split:
Acme Website Project — Milestone 1 of 3 (Scope + design signoff) $1,800.00 Subtotal: $1,800.00 GST (10%): $ 180.00 Total (AUD): $1,980.00
The milestone is named clearly. The client knows exactly which deliverable triggered this invoice. The next two invoices follow the same pattern: “Milestone 2 of 3 — Draft build” and “Milestone 3 of 3 — Final delivery”.
Step 4: Structure an hourly invoice
For weekly consulting work:
Consulting — week of 8 June 2026 (12.5 hr @ $150) $1,875.00 Subtotal: $1,875.00 GST (10%): $ 187.50 Total (AUD): $2,062.50
Attach a timesheet (a simple PDF or even a paragraph in the email body) showing what those 12.5 hours covered. Clients pay hourly invoices faster when they can see what they bought.
Step 5: Structure a retainer invoice
For a monthly content retainer:
Content retainer — June 2026 (8 articles, 2 revisions each) $3,200.00 Subtotal: $3,200.00 GST (10%): $ 320.00 Total (AUD): $3,520.00
Retainers are perfect candidates for recurring invoices — set it up once and the same invoice goes out on the first of every month without you remembering. See recurring invoice setup for how to wire it up in Free Invoice App.
Deposits for project work
For any milestone-style project over a couple of thousand dollars, take a deposit before you start. The standard pattern: 20–30% on signoff, the rest split across remaining milestones. Two reasons:
- It filters out clients who are not actually committed.
- It covers your time during the first phase, before any deliverable exists to invoice against.
Full template, wording, and how to structure the final invoice (which deducts the deposit already paid) in how to invoice for a deposit.
The IP and usage rights question
For freelance creative and digital work, the invoice is often where IP transfer happens. Two common patterns:
- IP transfers on final payment. A line on the final invoice (or the covering email) states: “On full payment of this invoice, all IP in the deliverables transfers to [Client] for [stated usage].” Standard for design, copy, and development work.
- Licensed usage. For photography, illustration, music, and stock-style assets, you license usage rather than transfer IP outright. The invoice spells out the scope: “web + social, 12 months, AU/NZ only”.
Whichever model you use, get it in writing before the work starts — the invoice just confirms what the engagement letter or proposal already said.
Scope changes: bill them separately
The most expensive thing freelancers do is absorb scope creep silently. The fix is a dedicated variation invoice for any out-of-scope work:
- Reference the original project name and quote number.
- Describe the extra work in one line.
- Reference the email/message where the client approved it.
Two short variation invoices send a cleaner signal than one bloated final invoice. Clients rarely push back when the trail is clear; they almost always push back when scope changes appear without warning.
The covering email matters
Even a perfect freelance invoice gets paid slowly when the email is weak. The pattern that works:
Subject: Invoice INV-0042 — Acme Website Milestone 2 — Due 18 June 2026 Hi [Client first name], Attached is INV-0042 for $1,980 covering Milestone 2 of the Acme Website project (draft build sign-off, delivered 4 June). Payment: BSB / Account: 000-000 / 000 000 000 Account name: [Your Business Name] PayID: [phone or email] Due 18 June 2026. Let me know if you need anything adjusted. Cheers, [Your name] ABN [your ABN]
Subject line wins matter: amount, project, milestone, and due date in the subject means the client (or their bookkeeper) can process the email in seconds. Full email template guidance in how to invoice a client for the first time.
Payment terms that work for freelancers
Net 7 is achievable from direct clients and small businesses. Net 14 is the practical default. Net 30 is what bigger companies and agencies want — for a 30-day client, take a larger deposit. Always state terms on the invoice and in the engagement letter; never assume.
For overdue chases, see how to follow up on an overdue invoice. For when to add a late fee, see late fees on invoices.
Overseas clients
Plenty of Australian freelancers bill overseas clients. The basics:
- Invoice in AUD or the client’s currency — both are valid. AUD simplifies your tax return; foreign currency simplifies the client’s payment.
- GST is usually zero-rated on services exported overseas (GST-free). Still list the GST line as $0.00 if you’re GST-registered.
- Wise / PayPal / direct international transfer — Wise is the most common choice for AUD-receiving freelancers because the fees are predictable and the exchange rate is fair.
Record-keeping for freelancers
Keep every invoice you issue for at least 5 years per the ATO — see how long to keep invoices. That also means keeping receipts for business expenses (laptop, software, home office, training) so you can deduct them. Full guide: how to track business expenses.
How Free Invoice App handles freelance invoicing
Free Invoice App is built for solo operators. Milestone invoices, hourly invoices, and monthly retainers (via recurring invoices) all work out of the box. Your ABN, payment details, and default terms are filled in once during setup and appear on every invoice. Pro+ adds a custom email domain so your invoices come from you@yourbusiness.com.au instead of a generic Gmail — faster payments, better deliverability. Get started free — the Free plan covers 7 sends per month.
Frequently asked questions
Do freelancers need an ABN to invoice in Australia?
Yes. Without one, the client legally must withhold 47% of payment for the ATO. ABNs are free and approved instantly in most cases at abr.gov.au.
How do I structure a milestone invoice?
Split the total project fee into named milestones (e.g. 30% on signoff, 40% on draft, 30% on final). Each milestone is its own invoice referencing the project and the milestone reached.
Should I charge GST as a freelancer?
Only if your turnover hits $75,000 in any 12-month period. Below that, most freelancers stay unregistered to keep admin simple.
How do retainer invoices work?
A fixed monthly fee for an agreed scope. Same amount invoiced on the same day every month — set up a recurring invoice so it goes out automatically.
How do I invoice for scope changes?
Issue a separate variation invoice referencing the original quote and the message where the client approved the extra work. Never bundle variations silently into the next invoice.