Use this calculator to add GST to a price or to find the GST included in a price. It also shows how the tax splits into CGST and SGST for supplies within a State, or IGST for supplies to another State.
How the Calculation Works
- Add GST: GST = Amount × Rate ÷ 100. Invoice value = Amount + GST.
- Remove GST: Taxable value = Amount × 100 ÷ (100 + Rate). GST = Amount − Taxable value.
- Within a State (intra-State): The tax is split equally between CGST and SGST (or UTGST in a Union Territory).
- Between States or on imports (inter-State): The full tax is charged as IGST.
Example
A service worth ₹10,000 is supplied at 18% within Gujarat. GST is ₹1,800, made up of CGST ₹900 and SGST ₹900. The invoice value is ₹11,800. If the same service is supplied to a customer in Maharashtra, the tax is IGST of ₹1,800.
Points to Keep in Mind
- The correct GST rate depends on the HSN code of the goods or the SAC of the service. From 22 September 2025, the main GST rates are 5%, 18% and 40% (with special rates such as 0.25%, 1.5% and 3% for specified goods); the earlier 12% and 28% slabs were removed. Check the current rate notification before invoicing. For any other rate, choose “Other rate”.
- The place of supply decides whether CGST + SGST or IGST applies, not just the location of the customer.
- Compensation cess, where applicable, is not included in this calculator.
Need Help?
North West Consultancy can help you with GST registration, return filing, rate classification and GST advisory for businesses in India and overseas. Contact North West Consultancy.
Office: 210, Vitthal The Mall, Koba Gandhinagar Road, Near Vishwakarma Engineering College, Ahmedabad, Gujarat – 382424
Raviraj Upadhyay (Partner): +91 90338 52145
Prashant Joshi (Partner): +91 97146 56484
Email: fca.raviraj@gmail.com
Disclaimer: This tool is for general information and quick estimation only. Results depend on the inputs entered and on the law, notifications and portal rules in force. It is not professional advice. Please verify with the official portal or notification before making a payment or filing.