GST Calculator
How to use
- Choose Add GST if your amount is before tax, or Remove GST if the price already includes GST.
- Enter the amount in rupees and tap a rate. 5% and 18% cover most goods and services. Use Custom for any other rate.
- Pick Within state to see CGST and SGST, or Other state to see IGST.
How it works
Add GST: GST = amount × rate ÷ 100, and the total is amount + GST. ₹1,000 at 18% gives ₹180 GST and ₹1,180 in total.
Remove GST: base price = inclusive amount × 100 ÷ (100 + rate), and GST is the difference. ₹1,180 including 18% GST has a base of ₹1,000.
Within a state the tax is split equally into CGST and SGST (or UTGST), so 18% becomes 9% + 9%. A sale to another state carries the full rate as IGST.
Rates follow GST 2.0, recommended at the 56th GST Council meeting on 3 September 2025 and in force from 22 September 2025 (CBIC Notification No. 9/2025-Central Tax (Rate)). The old 12% and 28% slabs were folded into 5% and 18%, a 40% rate applies to luxury and sin goods such as pan masala, aerated drinks and large cars, and the special 3% rate on gold and silver and 0.25% on rough diamonds continue. Essentials such as fresh milk and unbranded staples stay at 0%.
FAQ
What are the GST slabs now?
Since 22 September 2025 the main slabs are 5% and 18%, with 40% for a short list of luxury and sin goods and 0% for exempt items. Gold and silver are taxed at 3% and rough diamonds at 0.25%.
How do I calculate GST from an inclusive price?
Divide the price by (1 + rate ÷ 100). At 18%, ₹1,180 ÷ 1.18 = ₹1,000, so the GST part is ₹180. Remove GST mode does this for you.
When do I charge IGST instead of CGST and SGST?
IGST applies when the supplier and the place of supply are in different states or union territories, and on imports. Within the same state you charge CGST and SGST at half the rate each.
Is the tobacco compensation cess included?
No. Some tobacco products still carry compensation cess on top of GST until the related loans are repaid. This calculator covers GST only.