Indirect Tax
GST Calculator
Add GST to a base amount or extract GST from an inclusive total. Splits the result into CGST + SGST for intra-state and IGST for inter-state.
Calculation
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GST rate
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Frequently asked questions
What is the difference between CGST, SGST and IGST?
CGST and SGST apply together on intra-state supplies (the tax splits equally between the central and state governments). IGST applies on inter-state supplies, going entirely to the central government before being apportioned.
What are the GST rate slabs in India?
The main slabs are 0%, 5%, 12%, 18% and 28%, with a few items also taxed at 3% (gold/silver) or subject to cess (luxury and sin goods). 18% is the most common rate for services and general goods.
How do I calculate GST from an amount that already includes tax?
Use 'Remove GST' mode: divide the gross amount by (1 + rate/100) to get the net amount, then subtract to find the GST. For example, ₹11,800 inclusive of 18% GST has a net amount of ₹10,000 and GST of ₹1,800.
Who needs to register for GST?
Registration is mandatory once turnover crosses ₹40 lakh for goods (₹20 lakh in special-category states) or ₹20 lakh for services (₹10 lakh in special-category states) — and immediately, regardless of turnover, for inter-state suppliers, e-commerce sellers and a few other categories.