Free GST Invoice Template Australia (Download or Use Online - 2026)

Free GST Invoice Templates for Australian Businesses

If you're a sole trader, freelancer, or small business owner in Australia, issuing a valid GST tax invoice is a legal requirement - and it needs to include the right fields or your client can't claim their GST credits.

The good news: you don't need to pay for invoicing software to get started. Below you'll find everything you need - including what a compliant template must contain, a comparison of Word vs Excel vs online options, and a free online template you can use right now.

What a Valid Australian GST Invoice Template Must Include

The Australian Taxation Office (ATO) specifies exactly what fields must appear on a GST tax invoice. Your template needs to cover all of these - no exceptions.

Required Fields for Invoices Under $1,000

1. The words 'Tax Invoice' - must appear clearly, usually at the top
2. Your business name - as registered with the ATO
3. Your ABN (Australian Business Number) - 11-digit number
4. Date the invoice was issued
5. Description of goods or services supplied
6. GST amount - either as a separate line, or a statement that the total includes GST

Additional Fields Required for Invoices $1,000 and Over

1. Your client's name or business name
2. Your client's ABN (if they are GST-registered)

Any template that's missing even one of these fields is non-compliant. Your client's accountant may reject the invoice, and the ATO may disallow the GST credit claim.

GST Invoice Template: Word, Excel, or Online?

There are three main ways to use a free GST invoice template in Australia. Each has trade-offs:

Microsoft Word Template

Best for: One-off invoices, businesses that rarely invoice

A Word template gives you full control over the layout. You type in client details manually each time.

Pros:

• Free if you already have Word
• Fully customisable design
• Easy to print

Cons:

• Manual maths for GST calculations (error-prone)
• No invoice numbering automation
• No client history or record-keeping
• Easy to forget required ATO fields

How to use: Create a blank Word document, add your business name and ABN at the top, include 'Tax Invoice' as the title, then add line items with a manual GST calculation row. Save as PDF before sending.

Excel or Google Sheets Template

Best for: Small businesses comfortable with spreadsheets

Spreadsheet templates let you enter a formula so GST calculates automatically.

GST calculation formula (Excel/Sheets):

= [Pre-GST amount] * 0.1       → GST amount
= [Pre-GST amount] * 1.1       → GST-inclusive total
= [GST-inclusive total] / 11   → To extract GST from an inclusive price

Pros:

• Automatic GST maths
• Free with Google Sheets (no software needed)
• Can add a running invoice number column

Cons:

• No PDF generation built in (requires extra steps)
• No client database - you re-enter details every time
• Easy to accidentally overwrite previous invoices
• Looks less professional than dedicated software

Free Online Invoice Generator (Recommended)

Best for: Anyone who wants to look professional, save time, and stay ATO-compliant automatically

The fastest and most reliable way to create a GST tax invoice is with a free online generator like BGinvo. You fill in your details once, and the tool handles the rest.

BGinvo's free plan includes:

• 'Tax Invoice' heading - pre-filled, never forgotten
• ABN field stored per-business
• Automatic 10% GST calculation on every line item
• 3 professional invoice templates (you choose your style)
• Client management - save client ABNs so you never re-enter them
• PDF generation and direct email sending
• Up to 10 invoices per month, free forever

**Use the free online template →**

GST Invoice Template: What Good Layout Looks Like

Whether you use Word, Excel, or an online tool, a well-structured GST invoice should follow this layout:

Header (top of invoice)

• 'TAX INVOICE' - in large, clear text
• Your business name
• Your ABN
• Your contact details (email, phone - optional but professional)
• Invoice number
• Date of issue

Client Section

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

Line Items Table

Totals Section

• Subtotal (ex-GST): $2,000.00
• GST (10%): $200.00
• Total Amount Due: $2,200.00

Payment Details

• Bank name, BSB, Account number
• PayID (optional)
• Payment due date
• Payment terms (e.g., Net 14)

GST Calculation: Quick Reference

Australian GST is always 10% of the pre-GST (ex-GST) price.

Always show GST as a separate line item - this is the clearest way to satisfy ATO requirements and helps your client identify their input tax credit amount.

Common GST Template Mistakes to Avoid

Even with a template, these mistakes show up constantly:

1. Missing 'Tax Invoice' wording

The document must literally say 'Tax Invoice.' Just 'Invoice' is not enough for a GST-registered business.

2. No ABN on the invoice

Without your ABN, your client legally cannot claim their GST input credit. If your template doesn't have an ABN field, add one before sending a single invoice.

3. GST rolled into the total without a breakdown

You can state 'total price includes GST' - but showing it as a separate line is far less confusing and looks more professional.

4. Using a template designed for another country

Many free Word and Google Docs templates were created for US or UK businesses. They may use 'VAT' instead of 'GST,' lack ABN fields, and include invoice number formats that don't suit Australian practice. Always use a template built for Australia.

5. Not keeping copies

Australian tax law requires you to keep tax records for five years. If you're using a Word or Excel template, you need to manually archive every invoice. Online invoicing software does this automatically.

Who Needs to Issue a GST Tax Invoice?

You need to issue a tax invoice (not a regular invoice) if:

• You are registered for GST - mandatory if your annual GST turnover is $75,000 or more
• You're making a taxable sale (most goods and services attract GST)
• The sale is $82.50 or more (including GST)

If your turnover is under $75,000 and you haven't voluntarily registered for GST, you issue a standard invoice - you don't charge GST and you don't need the 'Tax Invoice' heading.

Skip the Template - Use BGinvo Free

Manual templates work, but they carry risk: wrong calculations, missing fields, no record-keeping, and hours of admin each week. BGinvo gives you a properly structured GST tax invoice every time - with zero setup and no subscription required.

Free plan, no credit card:

• Up to 10 invoices/month
• All ATO-required fields built in
• Automatic GST maths
• PDF export + email delivery
• Stored invoice history (no more lost spreadsheets)

**Start invoicing free →**

Frequently Asked Questions

Can I use a free template instead of paid invoicing software?

Yes - a Word or Excel template is technically valid as long as it contains all ATO-required fields. The trade-off is manual data entry, manual GST maths, and no automated record-keeping. For very occasional invoicing (1-2 invoices per month), a template is fine. For regular invoicing, software saves significant time and reduces errors.

Is a Google Docs invoice template ATO-compliant?

It can be, if you manually add all the required fields. Google Docs templates are designed for generic use - not specifically for Australian tax invoices. You'll need to add 'Tax Invoice' as the title, include an ABN field, and set up GST calculations manually.

Do I need a different template for invoices over $1,000?

Your base template can be the same - you just need to ensure client ABN is included for any invoice $1,000 or more. A well-designed template should have the client ABN field always visible, so you never forget it on high-value invoices.

What if I make a mistake on a tax invoice?

Issue a credit note to cancel the incorrect invoice, then reissue a corrected tax invoice with the right information. Never just cross out or edit a sent invoice - this creates accounting confusion. BGinvo lets you duplicate and edit invoices in seconds.

Can I use the same template for GST-free supplies?

If you're billing for a GST-free supply (like fresh food, certain medical services, or exports), you still issue a tax invoice - but you show the GST amount as $0.00 and the tax code as 'GST-free.' Your total will equal the pre-GST price. Always note GST-free status clearly on the invoice.

How many invoices can I create with BGinvo's free plan?

BGinvo's free plan includes up to 10 invoices per month - permanently free, no trial period. There's no credit card required to sign up. If you grow beyond 10 invoices per month, the Premium plan is $22/month (or $17/month billed annually).