Free tool
GST calculator
Add GST to a price or take it out, for India (CGST and SGST, or IGST), Australia and New Zealand, split exactly as a ReliTime tax invoice splits it. Free, with no sign-up.
Rates as of 22 September 2025 in India, when the standard slabs became 5%, 18% and 40%. Nothing you type is kept.
Questions people ask
How is GST taken out of a price that includes it?
The price is divided by one plus the rate, and the GST is what is left. At 10% in Australia that is 1/11 of the price; at 15% in New Zealand it is 3/23; at 18% in India it is 18/118.
When is it CGST and SGST, and when IGST?
Within one Indian state the tax is split equally between CGST and SGST; between two states it is all IGST. Where the split is an odd number of paise, the extra paisa goes to SGST, so the two always add up to the total.
Which GST rates apply in India now?
Since 22 September 2025 the standard slabs are 5%, 18% and 40%, with 0% for exempt supplies. Professional and engineering services are 18%.
See it on your own kind of work
We set ReliTime up with a walkthrough rather than a sign-up form. We will take you through a working organisation, from a week of timesheets through approvals and work in progress to a GST invoice, answer your questions as we go, and set up yours.
Or write to hello@relitime.com.