🧾 GST Calculator

Calculate GST at all Indian rates (5%, 12%, 18%, 28%) with automatic CGST and SGST breakdown. Add GST to base amount or remove GST from inclusive amount instantly.

Amount (₹) GST Rate

About the GST Calculator

India's Goods and Services Tax (GST) system was introduced in July 2017 to replace multiple indirect taxes. Our GST calculator handles all four GST rates (5%, 12%, 18%, 28%) and shows the CGST/SGST split automatically, making it perfect for business invoicing, expense calculations, and tax planning.

Understanding GST Rates in India

5% GST: Essential items like food, footwear, branded paneer, packaged chicken
12% GST: Computers, processed foods, butter, cheese, ghee, mobiles
18% GST: Most services, electronics, restaurants (non-AC), soap, toothpaste
28% GST: Luxury items, automobiles, ACs, refrigerators, cement
0% GST (Exempt): Fresh fruits, vegetables, milk, eggs, education, healthcare

CGST vs SGST vs IGST

CGST (Central GST): Goes to the central government, always half of total GST
SGST (State GST): Goes to the state government, always half of total GST
IGST (Integrated GST): Applied on inter-state transactions, equal to total GST

For example, on a ₹1000 product with 18% GST: Total GST = ₹180. If intra-state: CGST = ₹90 + SGST = ₹90. If inter-state: IGST = ₹180.

Add GST vs Remove GST

Add GST (Exclusive): Use when you have the base price and want to find the total with GST. Example: Product priced at ₹1000 + 18% GST = ₹1180.

Remove GST (Inclusive): Use when the price already includes GST and you want to find the base. Example: ₹1180 inclusive of 18% GST → Base = ₹1000, GST = ₹180.

How to Use 🧾 GST Calculator

Step 1: Enter the Amount
Input the rupee amount you want to calculate GST on.
Step 2: Select GST Rate
Choose 5%, 12%, 18%, or 28% based on the product/service category.
Step 3: Choose Add or Remove
Select 'Add GST' if your amount is exclusive of GST, or 'Remove GST' if it's already inclusive.
Step 4: Click Calculate GST
Get instant results with base amount, GST amount, total amount, and CGST/SGST breakdown.
Step 5: Use Results in Invoice
Use these calculations to create GST-compliant invoices for your business.

Frequently Asked Questions

What is GST?

Goods and Services Tax (GST) is a comprehensive indirect tax levied on the supply of goods and services in India. It replaced multiple taxes like VAT, service tax, excise duty, etc., when introduced on July 1, 2017.

How is GST calculated?

For exclusive amount: GST = Amount × Rate. For inclusive amount: GST = Amount × Rate / (100 + Rate). Total GST is split equally as CGST and SGST for intra-state transactions.

When is IGST charged instead of CGST+SGST?

IGST is charged on inter-state supplies (when seller and buyer are in different states). For intra-state (same state) supplies, CGST + SGST is charged equally.

What is GST registration threshold?

Businesses with annual turnover above ₹40 lakh (₹20 lakh in special category states) must register for GST. Service providers have a ₹20 lakh threshold (₹10 lakh in special states).

Can I claim Input Tax Credit (ITC)?

Yes, registered GST businesses can claim ITC on GST paid on purchases (inputs) used for business. This reduces the net GST you pay to the government.

How often should I file GST returns?

GSTR-1 (sales) is filed monthly, GSTR-3B (summary) is filed monthly, GSTR-9 (annual) is filed yearly. Small taxpayers under composition scheme file quarterly.

Are there penalties for late GST filing?

Yes, ₹50/day (₹20/day for NIL returns) up to ₹5000 maximum. Plus interest at 18% per annum on unpaid tax.