GST Calculator

Goods and Services Tax (GST) is India's unified indirect tax that replaced multiple earlier taxes like VAT, service tax, and excise duty. Every business selling goods or services above the threshold must collect GST and remit it to the government.

How to Add GST

GST Amount = Original Price × GST Rate / 100
Total Price = Original Price + GST Amount

How to Remove GST (Reverse Calculation)

Original Price = GST-inclusive Price ÷ (1 + GST Rate / 100)
GST Amount = GST-inclusive Price − Original Price

GST Rate Slabs in India

0% — Essential goods: rice, wheat, milk, eggs, fresh vegetables.
5% — Basic necessities: edible oils, sugar, tea, coffee, medicines.
12% — Processed foods, computers, mobile phones.
18% — Most services, electronics, capital goods. The largest revenue slab.
28% — Luxury items: cars, tobacco, aerated drinks, high-end electronics.

CGST vs SGST vs IGST

For intra-state transactions (buyer and seller in same state), GST is split equally between CGST (Central GST) and SGST (State GST). For inter-state transactions, only IGST applies — which equals CGST + SGST combined.

Frequently Asked Questions

What is the GST threshold limit?

Businesses with annual turnover above ₹20 lakh (₹10 lakh for special category states) must register for GST. For e-commerce sellers, GST registration is mandatory regardless of turnover.

Is GST charged on GST?

No. GST is always calculated on the base price, never on top of another GST. The cascading tax effect was one of the problems GST was specifically designed to eliminate.