Invoice Total with GST Calculator

Calculate invoice totals with or without GST (10% in Australia), and extract GST from GST-inclusive prices.

Calculation Type

Amount ($)

GST Rate (%)

Australia: 10% | NZ: 15%

Line Item 2 (optional)

Line Item 3 (optional)

Line Item 4 (optional)

How to Use

Add GST: Enter your pre-tax price to get the GST-inclusive total

Remove GST: Enter a GST-inclusive price to extract the GST component

Multiple line items: Enter up to 4 line items for a full invoice breakdown

> In Australia, GST is 10%. New Zealand uses 15%. Change the GST rate field as needed.

Formula

Add: Total = Amount × 1.10 | Remove: GST = Total ÷ 11 | Ex-GST = Total × 10/11

When do I need to charge GST?

In Australia, you must register for and charge GST once your annual turnover reaches $75,000 ($150,000 for non-profits).

How do I calculate GST from a GST-inclusive price?

Divide by 11. A $110 GST-inclusive price contains $10 GST ($110 ÷ 11 = $10).

What is a tax invoice?

A tax invoice is required for B2B transactions over $82.50. It must include your ABN, GST amount, buyer/seller details, and invoice date.

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