Business & Finance
GST Calculator
Calculate GST on a price, or find the base price from a GST-inclusive amount, with the tax split for intra-state and inter-state supplies.
Runs entirely in your browser — nothing you enter is sent or stored.
How it works
Adding GST: tax = amount × rate. Removing GST: base = amount ÷ (1 + rate), tax = amount − base. Within a state the tax splits equally into CGST and SGST; between states it is charged as IGST. From 22 September 2025 most goods and services moved to the 5% and 18% slabs, with 40% for specified luxury and sin goods. Always confirm the rate for your HSN/SAC code on the CBIC website.
Frequently asked questions
What GST applies to web design services?
IT and web design services (SAC 9983) are generally taxed at 18%. Check with your accountant for your specific case.
Do I need to register for GST?
Service providers generally must register once annual turnover passes ₹20 lakh (₹10 lakh in special category states). Confirm the current threshold for your state.