Why Invoicing Matters More Than You Think
As a freelancer, your invoicing process is your cash flow engine. It doesn't matter how talented you are or how much work you book — if your invoicing is sloppy, late, or confusing, you'll spend your time chasing money instead of doing the work you love.
Good invoicing isn't just about getting paid. It's about looking professional, meeting your tax obligations, and building a sustainable freelance business. Here are ten tips that will make a real difference.
1. Always Include Your ABN
If you have an Australian Business Number (ABN), it must appear on every invoice. This isn't just best practice — it's a legal requirement under certain circumstances, and omitting it has real financial consequences.
If you provide a service to a business and don't quote your ABN, they are legally required to withhold 47% of your payment and send it to the ATO. You'll get this money back when you lodge your tax return, but in the meantime, you're out almost half your income.
Action: Put your ABN in your invoice template header so it appears on every invoice automatically.
2. Understand the GST Threshold
If your annual freelance turnover is $75,000 or more, you must register for GST and charge 10% on your services. If you're under the threshold, you can choose to voluntarily register or not.
If you're GST-registered:
- Your invoices must be tax invoices (labelled as such)
- You must show the GST amount separately or state the total includes GST
- You charge 10% GST on top of your fees
- You can claim GST credits on business purchases
If you're not GST-registered:
- Your invoices should not show GST
- You cannot claim GST credits
- You don't need to lodge a BAS
Action: Know where you stand on the $75,000 threshold and set up your invoicing accordingly. If you're approaching the threshold, register for GST before you cross it, not after.
3. Set Clear Payment Terms
Payment terms tell your client when you expect to be paid. Common terms for Australian freelancers:
- Due on receipt — payment expected immediately
- Net 7 — payment due within 7 days
- Net 14 — payment due within 14 days
- Net 30 — payment due within 30 days
The shorter your payment terms, the faster you get paid. Many freelancers default to Net 30 because it seems standard, but there's no law requiring it. If you're a sole trader with bills to pay, Net 7 or Net 14 is perfectly reasonable.
Action: Choose your payment terms and state them clearly on every invoice. Put them near the top, not buried in fine print.
4. Invoice Immediately After Completing Work
The number one reason freelancers get paid late is that they invoice late. If you finish a project on Friday and don't send the invoice until the following Wednesday, you've already lost five days.
Invoice the same day you deliver the work, or the next business day at the latest. The closer the invoice is to the delivery, the stronger the psychological connection between the work and the payment.
For ongoing work (retainers, monthly projects), set a fixed invoicing day — for example, every first Monday of the month — and stick to it without exception.
Action: Set a rule for yourself: work is not "done" until the invoice is sent.
5. Use Professional Invoice Design
Your invoice is a business document that represents your brand. A clean, well-designed invoice communicates professionalism and makes clients more likely to pay promptly.
A professional freelancer invoice should include:
- Your business name and logo
- Your ABN
- "Tax Invoice" label (if GST-registered)
- Unique invoice number (sequential: INV-001, INV-002, etc.)
- Date issued
- Client's name and business details
- Clear description of work performed
- Quantity, rate, and line totals
- GST breakdown (if applicable)
- Total amount due
- Payment terms and due date
- Your bank details or payment link
Action: Create a template once and reuse it. Don't start from scratch every time.
6. Number Your Invoices Sequentially
The ATO expects your invoices to be numbered in a logical sequence. This helps with record-keeping and makes it easy to spot missing invoices during an audit.
Use a simple system: INV-001, INV-002, INV-003 — or a date-based prefix like 2026-001, 2026-002. Whatever system you choose, stick with it.
Action: Never reuse an invoice number. If you cancel an invoice, mark it as cancelled and move to the next number.
7. Describe Your Work Clearly
Vague invoice descriptions lead to payment delays. "Consulting services — $2,000" tells the client nothing. Compare that with:
- "Brand strategy workshop — 3 hours at $200/hr: $600"
- "Logo design — 2 concepts with 3 rounds of revisions: $1,400"
Clear descriptions reduce disputes, speed up approvals (especially in larger companies where someone other than your contact processes payments), and create a useful record for both parties.
Action: Write descriptions that would make sense to someone who wasn't involved in the project.
8. Follow Up on Overdue Invoices
Chasing money is uncomfortable, but silence is expensive. If an invoice is overdue:
- Day 1 past due: Send a polite reminder. "Hi [Name], just a friendly reminder that invoice #INV-042 was due yesterday. Happy to resend if needed."
- Day 7 past due: Follow up more directly. "I'm following up on invoice #INV-042, which is now 7 days overdue. Could you confirm when I can expect payment?"
- Day 14 past due: Escalate. "Invoice #INV-042 is now 14 days overdue. I'd appreciate payment within the next 3 business days. Please let me know if there's an issue."
- Day 30+ past due: Consider pausing further work for this client until the balance is cleared, and mention this in your communication.
Most overdue invoices are the result of oversight, not malice. A simple reminder usually resolves it.
Action: Set up automated payment reminders in your invoicing software. Don't rely on memory.
9. Track Your Expenses
Invoicing is only half the financial picture. As a freelancer, you also need to track business expenses — and you should be doing this throughout the year, not in a panic at tax time.
Deductible expenses for freelancers commonly include:
- Software subscriptions (design tools, accounting software, cloud storage)
- Home office costs (a proportion of rent, electricity, internet)
- Equipment (laptop, phone, peripherals)
- Professional development (courses, conferences, books)
- Marketing costs (website hosting, business cards, advertising)
- Insurance (professional indemnity, public liability)
- Travel for work purposes
Action: Log every business expense as it occurs. Use an app that lets you photograph receipts — paper receipts fade and get lost.
10. Use Accounting Software From Day One
Spreadsheets work when you have three clients and ten invoices a year. Beyond that, you need proper invoicing and accounting software. The benefits are significant:
- Professional invoices generated in seconds
- Automatic GST calculations so you never get the maths wrong
- Payment tracking — see at a glance who has paid and who hasn't
- Expense logging with receipt capture
- Financial reports — profit and loss, revenue by client, outstanding invoices
- BAS preparation — your GST figures are ready when BAS time comes
- Tax time simplicity — hand your accountant a clean set of records instead of a shoebox
The cost of accounting software is a tax-deductible business expense. The time it saves you is worth far more than the subscription.
How OneBookPlus Helps Freelancers
OneBookPlus was built for exactly this — Australian freelancers and sole traders who need professional invoicing without the complexity of enterprise accounting software.
With OneBookPlus, you get:
- Professional invoice templates with your logo, ABN, and GST handling
- Sequential invoice numbering managed automatically
- Payment reminders that chase overdue invoices for you
- Expense tracking with receipt capture
- GST summary reports for BAS preparation
- Client management — all your freelance clients and their history in one place
- Online payments via Stripe so clients can pay by card instantly
- A free plan that covers everything a freelancer needs to get started
Get Started
Your invoicing process should be the easiest part of freelancing — not the most frustrating. OneBookPlus gives Australian freelancers professional invoicing, expense tracking, and GST reporting on a free plan. Start your free trial and invoice like a professional from day one.