GST Calculator
Add or remove GST from a price at any rate — for India, Australia, Canada, NZ.
Goods and Services Tax works similarly to VAT and is used in countries like India, Australia, Canada, and New Zealand. This calculator adds GST to a net price or extracts it from a GST-inclusive price.
GST rates vary a lot by country
India uses a multi-tier GST system (commonly 5%, 12%, 18%, or 28% depending on the goods category), while Australia and New Zealand use a flat 10% and 15% respectively, and Canada's federal GST is 5% (often combined with provincial tax). Confirm the specific rate for your country and product before invoicing.
Extracting GST from a total
If a price already includes GST and you need to know the tax component, divide by (1 + GST rate) to get the net price, then subtract that from the total to find the tax — this calculator does that math for you when you select "remove GST."
Frequently asked questions
Is GST charged on top of other taxes?
In some countries, yes — Canada's HST (Harmonized Sales Tax) combines federal GST with a provincial component into one rate that varies by province. Check your specific jurisdiction's combined rate.
Do small businesses need to charge GST?
Most countries set a revenue threshold below which registration and GST collection isn't required — this varies by country, so check your local tax authority\'s current threshold.