CalcGST helps Australian sole traders and small businesses handle everyday GST calculations and simple paperwork. You can calculate one amount, work through a list, or prepare an invoice, quote or receipt without creating an account.
Who operates the site
CalcGST is operated by Star Shop com, ABN 83 443 122 821, in Melbourne, VIC, Australia. Business details can be checked in official ABN Lookup. Contact us at hello@calcgst.au.
What we focus on
Clear inputs, readable results and useful explanations. The calculators run in your browser. Document drafts are stored locally so you can return to them on the same device; final documents remain your responsibility to save and review.
Independent, with official references
We are not the Australian Taxation Office and do not claim ATO approval or certification. Our guides link to official sources and our editorial policy explains our approach. The site provides general information and arithmetic, not personal tax, accounting or legal advice.
Keeping the tools free
We intend to support the site through advertising. All current tools are free. Advertising, when enabled, will be labelled and kept separate from calculator controls and results. Advertisers do not determine the GST calculations.