ABOUT US
Built for Australians Who Deal with GST
Free, ATO-compliant calculators and plain-English guides — because nobody should need an accounting degree to work out 10%.
OUR STORY
Why We Built This
GST Calculator Australia started with a simple frustration: the tools that existed were cluttered with ads, riddled with pop-ups, or buried the answer behind unnecessary sign-up forms. We figured Australians deserved something better.
So we built a GST calculator that does one thing well — gives you the right number, instantly. No sign-ups. No paywalls. No nonsense. Just the ATO-compliant formulas you’d use yourself, wrapped in a clean interface that works on your phone or your desktop.
But a calculator alone wasn’t enough. GST trips people up in subtle ways — is that invoice GST-inclusive or exclusive? When do you actually need to register? What counts as GST-free? We wrote plain-English guides for the questions we kept seeing business owners and sole traders ask, with every fact sourced from the ATO and the A New Tax System (Goods and Services Tax) Act 1999.
What We Offer
Tools and Guides, Always Free
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GST Calculators
Add GST, remove GST, batch-calculate multiple amounts, work out BAS obligations, and estimate margin scheme GST — all client-side, all instant.
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Plain-English Guides
From GST registration to BAS lodgement, each guide explains one topic clearly with worked examples, sourced from ATO publications.
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Privacy-First Design
Every calculation runs in your browser. We don’t store your numbers, don’t require an account, and don’t sell your data.
Our Approach
What Matters to Us
Accuracy first. The GST rate is 10%. That hasn’t changed since July 2000, and our formulas match the ATO’s own guidance exactly. If something on this site doesn’t line up with the legislation, we want to know — drop us a line on our contact page.
No jargon without explanation. If we use a term like “input tax credit” or “taxable supply,” we explain it. Our audience includes first-time sole traders and experienced accountants alike, and both deserve clarity.
Speed and simplicity. Pages load fast. Calculators respond instantly. We don’t interrupt you with modals, newsletter pop-ups, or auto-playing videos. You came here for an answer — we respect that.
Important Notice
General Information Only
Everything on GST Calculator Australia is provided for general informational purposes. We’re not accountants, tax agents, or financial advisers, and nothing on this site constitutes professional tax or financial advice.
For advice specific to your circumstances, consult a registered tax agent or the Australian Taxation Office directly. All factual information is sourced from ATO publications and the A New Tax System (Goods and Services Tax) Act 1999.