A clear invoice answers three questions instantly: who is billing, what for, and exactly how to pay — that is what gets it paid faster.
Australian tax invoices must show your ABN and, if you are GST-registered, the words "Tax Invoice" plus the 10% GST shown separately.
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GST registration is compulsory once your turnover hits $75,000 a year; you must supply a tax invoice within 28 days for taxable sales of $82.50 (incl. GST) or more on request.
Shorter terms (Net 7 or Net 14), immediate sending and a one-click payment link dramatically reduce how long you wait to get paid.
All-in-one Australian software like OneBookPlus automates GST, payment links and reminders, with a genuine $0 free plan and flat pricing.
A small business invoice gets paid faster when it answers three questions instantly: who is billing, what for, and exactly how to pay. Get those right — plus your ABN, , a clear due date and a one-click payment option — and you turn a payment request into the easiest decision your client makes all week. This guide walks through everything an Australian small business, tradie, freelancer or consultant needs to invoice professionally and get paid on time.
An invoice isn't just a payment request. It's a legal document, a record for your BAS and tax return, and often the last impression a client has of your business before they pay you. A professional, clear invoice gets paid faster. A confusing, incomplete one gets ignored.
Whether you're a freelancer, tradie, consultant or small business owner, getting invoicing right is one of the simplest ways to improve your cash flow — no extra clients required.
If you run a business in Australia, there are specific rules set by the ATO:
Show your ABN on every invoice. If you don't quote an ABN, a business customer may have to withhold 47% from the payment under the no-ABN withholding rule.
GST-registered businesses must issue a "Tax Invoice" clearly labelled as such, showing the 10% GST component. You must register for GST once your turnover reaches $75,000 a year (or $150,000 for non-profits).
For a taxable sale of $82.50 or more (including GST), you must provide a tax invoice within 28 days if the customer asks. That figure is simply $75 plus 10% GST and isn't indexed, so it stays the same year to year.
Tax invoices for sales of $1,000 or more must also show the buyer's identity or ABN.
If you're not registered for GST, you still issue invoices — you just can't call them "tax invoices" or charge GST. Our free GST calculator makes it easy to add or back out the 10% correctly.
Different countries have their own rules — UK VAT (standard 20% plus VAT number), New Zealand GST (15% plus GST number), India GST (GSTIN plus HSN/SAC codes), or US state sales tax (often with your EIN). If you invoice international clients, pick software that can switch tax labels and currency per customer rather than forcing everything into one format.
Shorter terms = faster payment. Net 14 outperforms Net 30 significantly. Only offer Net 30 if the client specifically requires it.
Send invoices immediately. Don't wait until the end of the month. Invoice the moment the work is done — the longer you wait, the longer you wait to get paid.
Include a payment link. If clients can pay with one click (via card, Apple Pay or direct bank transfer), you'll get paid faster than if they have to manually re-key your bank details.
Set up automatic reminders. Send a polite reminder before the due date, on the due date, and again after. Most late payments aren't malicious — people are busy and forget.
Offer multiple payment methods. Bank transfer, card, PayID and BPAY — the more options, the fewer excuses.
Send a formal letter of demand stating the amount, original due date, and a final deadline (usually 7–14 days). Mention that further action may follow if unpaid.
Consider a debt collection agency or your state's small claims tribunal (in NSW, for example, the NCAT handles many small business disputes). For smaller amounts these processes are straightforward and usually don't require a lawyer.
Prevention is better than collection. Taking deposits upfront, agreeing terms in writing, and using progress billing for long projects all reduce your exposure to bad debt.
Your invoice is a touchpoint. Use your logo, brand colours and consistent formatting. It builds trust and signals you'll be just as organised about the work.
Mobile app — create and send invoices from your phone, on the job
Automatic GST calculation — no manual maths
Payment integration — card, PayID or direct bank
Quote-to-invoice conversion — no re-entering data
Recurring invoices — for retainers and subscriptions
Reports — revenue, outstanding and overdue at a glance
Want to test the output before committing to a platform? Try our free invoice generator — it creates a clean, professional PDF invoice in your browser with no sign-up.
OneBookPlus is an all-in-one platform built and hosted in Australia (AWS Sydney), so your invoicing is GST-, ABN- and BAS-native out of the box:
Professional tax invoices in seconds — branded with your logo and colours, GST handled automatically
One-click email delivery with a PDF attached
Online payment via Stripe — clients pay from the invoice with a link
Automatic payment reminders before and after the due date
Quote-to-invoice conversion in one tap
Recurring invoices for ongoing clients and retainers
Bookings, jobs, CRM and accounting in one place — invoicing connects to the rest of your business instead of living in a silo
A built-in AI assistant to draft follow-ups and summarise what's outstanding
Mobile-first — raise an invoice from your phone the moment a job is done
Unlike subscription-first tools, OneBookPlus has a genuine $0 free plan with no credit card required, and flat, predictable pricing as you grow. For a deeper look at local requirements, see our guide to Australian invoicing software.
At a minimum: your business name and ABN, the words "Tax Invoice" if you're GST-registered, the client's details, an invoice number and date, a clear description of what you're charging for, the GST shown separately, the total due, a due date and payment instructions. For taxable sales of $82.50 (incl. GST) or more, you must supply a tax invoice within 28 days if the customer asks.
Only if you're registered for GST, which is compulsory once your business turnover reaches $75,000 a year. Below that you can register voluntarily, but if you don't, you can't charge GST or label your invoices "tax invoices."
Send the invoice immediately after the work, use short terms like Net 7 or Net 14, include a one-click online payment link, and set up automatic reminders before and after the due date. Software like OneBookPlus automates all of this so you don't have to chase manually.
