How to Create a GST Tax Invoice in Australia (2026 Complete Guide)

What Is a GST Tax Invoice in Australia?

A tax invoice is an official document that a GST-registered business must issue when they make a taxable sale of $82.50 or more (including GST). It serves as the legal record of the transaction and is the document your clients need to claim GST credits.

If you're registered for GST - either because your turnover exceeds $75,000 per year, or you've chosen to register voluntarily - you're required by the Australian Taxation Office (ATO) to issue a valid tax invoice within 28 days of a customer requesting one.

For many freelancers and sole traders, this feels complicated. But once you know the rules, creating a compliant GST tax invoice takes less than a minute.

ATO Requirements: What Must Be on a GST Tax Invoice?

The ATO has specific requirements for what a tax invoice must contain. Missing any of these means your invoice is technically non-compliant, and your client may not be able to claim their GST credit.

For Sales Under $1,000

For taxable sales under $1,000, your tax invoice must include:

1. The words 'Tax Invoice' - clearly stated at the top of the document
2. Your business name - the name you're registered under
3. Your ABN (Australian Business Number) - 11-digit number issued by the ATO
4. Date of issue - when the invoice was issued (not the payment due date)
5. Brief description of items or services - what was supplied
6. GST amount - either the GST as a separate line item, OR a statement that the total price includes GST

For Sales $1,000 and Over

For sales $1,000 or more, the same requirements apply, but you must also include:

1. Your client's name - the individual or business being invoiced
2. Your client's ABN - if they are GST-registered

Optional but Recommended

• Invoice number (for your records and easier tracking)
• Payment due date and payment terms
• Your bank account details or payment link
• Your contact details (email, phone, address)

Tax Invoice vs Regular Invoice: What's the Difference?

Many Australian freelancers confuse a regular invoice with a tax invoice. Here's the key distinction:

If you're not registered for GST (i.e., your turnover is under $75,000 and you haven't voluntarily registered), you issue a standard invoice - not a tax invoice. You cannot charge GST or include it on your invoice.

Step-by-Step: How to Create a GST Tax Invoice

Step 1: Confirm You're GST-Registered

Before issuing a tax invoice, confirm your GST registration status at the ATO Business Portal. If you're not registered but should be (turnover over $75,000), you must register before charging GST.

Step 2: Choose Your Invoice Format

You can create a tax invoice using:

• Invoicing software (the fastest, most error-proof method - BGinvo generates ATO-compliant tax invoices automatically)
• A Word or Excel template
• A PDF template

Using dedicated invoicing software is strongly recommended - it automatically includes all required fields, calculates GST, and reduces the risk of non-compliance.

Step 3: Add Your Business Details

At the top of your invoice, include:

• Your business name (as registered with the ATO)
• Your ABN - find yours at abr.business.gov.au
• Your contact details (optional but professional)

Step 4: Add Your Client's Details

Include:

• Client's full name or business name
• Client's ABN (required if invoice is $1,000+)
• Client's billing address (optional for most invoices)

Step 5: Describe the Goods or Services

Write a clear description of what was supplied. Be specific - 'Consulting services' is acceptable, but 'Digital marketing consulting - March 2026, 10 hours @ $150/hour' is better for your records and your client's.

Step 6: Calculate GST Correctly

GST in Australia is 10% of the pre-GST price.

• If you're adding GST to your price:

Pre-GST price × 1.1 = GST-inclusive total

*Example: $1,000 × 1.1 = $1,100 (includes $100 GST)*

• If you need to find the GST in a GST-inclusive price:

Total ÷ 11 = GST amount

*Example: $1,100 ÷ 11 = $100 GST*

Show the GST as a separate line item on your invoice - this makes it easy for your client to identify and claim their input tax credit.

Step 7: Set Payment Terms

Common Australian payment terms:

• Net 7 - payment due within 7 days
• Net 14 - payment due within 14 days
• Net 30 - payment due within 30 days (standard for larger businesses)

For freelancers and sole traders, Net 7 or Net 14 is recommended to improve cash flow.

Step 8: Include Payment Details

Make it easy to get paid by including:

• Bank account BSB and account number
• PayID (if set up)
• A payment link (if using online payment processing)

Step 9: Send the Invoice

Email the invoice as a PDF attachment, or send it directly via invoicing software. Keep a copy for your own records - you're required to retain tax records for five years under Australian tax law.

GST-Free vs GST-Exempt: What You Need to Know

Not all sales attract GST. Some supplies are GST-free (0% GST but still reported to the ATO), while others are input-taxed (not subject to GST and you can't claim credits).

Common GST-free supplies:

• Fresh food (basic groceries)
• Medical services (most)
• Education courses (eligible)
• Exports of goods or services overseas
• International travel

Common input-taxed supplies:

• Financial services
• Residential rent
• Precious metals

If your work involves any of these categories, consult a registered tax agent or accountant to ensure you're applying the right treatment.

What Happens If You Issue an Incorrect Tax Invoice?

The ATO takes tax invoice compliance seriously. If you issue an invoice missing required fields:

• Your client cannot claim GST credits on the purchase
• You may be asked to issue a corrected invoice
• Repeated non-compliance can trigger an ATO audit

The good news: fixing an invoice is straightforward - issue a credit note to cancel the original, then reissue a corrected version.

How BGinvo Makes GST Invoicing Simple

Creating a manually compliant GST tax invoice every time is tedious and error-prone. BGinvo automates the entire process:

• Auto-generates 'Tax Invoice' heading - no forgetting the required wording
• ABN field built-in - stores your ABN and applies it to every invoice
• Automatic GST calculation - enter your pre-GST price and BGinvo calculates the 10% GST and total instantly
• Professional templates - 9 designs that look polished and credible
• PDF generation - export and send in one click
• Client management - store client ABNs and details so you never re-enter them

BGinvo's free plan includes GST invoicing for up to 10 invoices per month - enough to get started without spending a cent.

**Create your first GST invoice free →**

Frequently Asked Questions

Do I have to register for GST in Australia?

You must register for GST if your business has a GST turnover of $75,000 or more in a 12-month period, or if you provide taxi or ridesharing services, or if you want to claim fuel tax credits. If your turnover is below $75,000, registration is optional - but many sole traders choose to register voluntarily to appear more professional and claim back GST on business expenses.

What's the penalty for not issuing a tax invoice?

There's no direct fine for failing to issue a tax invoice, but your client cannot claim GST input tax credits without one. If the ATO determines you've been collecting GST without proper documentation, you may face audit adjustments and penalties. Always issue tax invoices within 28 days of a client requesting one.

Can I create a tax invoice in Word or Excel?

Yes - a handwritten or Word-formatted document is technically valid as long as it contains all required ATO fields. However, manual invoices are error-prone, time-consuming, and unprofessional. Dedicated invoicing software like BGinvo generates compliant invoices automatically in seconds.

What if my client doesn't have an ABN?

If your client is an Australian business and cannot provide an ABN for an invoice over $1,000, you may be required to withhold 47% of the payment and send it to the ATO (this is called no-ABN withholding). Always ask for your client's ABN before starting work.

How long do I need to keep tax invoice records?

The ATO requires you to keep tax records for five years from the date you lodge your tax return. This includes copies of all tax invoices you've issued and received. BGinvo stores all your invoices securely in the cloud, so you're always compliant.

Can I charge GST on services provided overseas?

If your services are consumed overseas by a foreign client, they are generally GST-free exports. You do not charge GST, but you still report the supply on your BAS. If the work is performed in Australia for a foreign client who is in Australia when they receive the service, GST may apply. Consult your accountant for complex international arrangements.