How is GST calculated in India?

To add GST (Exclusive): GST Amount = (Base Price × GST%) / 100, Gross Total = Base Price + GST Amount. To remove GST (Inclusive): Base Price = (Gross Amount × 100) / (100 + GST%), GST Amount = Gross Amount - Base Price.

What is the difference between CGST, SGST, and IGST?

For transactions within the same state (Intra-state), GST is split equally between Central GST (CGST) and State GST (SGST). For inter-state transactions between two different states, Integrated GST (IGST) is collected by the Central Government.

What are the common GST tax slabs in India?

The standard GST rates in India are 0% (essential food items), 3% (gold/jewellery), 5% (packaged foods, apparel under ₹1000), 12% (business services, processed food), 18% (most IT services, consumer goods, digital subscriptions), and 28% (luxury items, automobiles, aerated beverages).

Online GST Calculator

Free Business Utility

GST Calculator India

Quickly calculate GST amounts, reverse GST, and tax splits for CGST, SGST, and IGST across all tax slabs (3%, 5%, 12%, 18%, 28%).

Calculation Type

Calculates tax to add onto the base product or service amount.

Net / Base Amount (₹)

₹

Select GST Rate Slab

GST Tax Breakdown (Intra vs Inter-State)

Intra-State

CGST (9%) + SGST (9%)

Inter-State

IGST (18%)

Calculation Result

GST Rate: 18%

Net / Base Amount:₹10,000.00

CGST (9%):₹900.00

SGST / UTGST (9%):₹900.00

Total GST Amount:+₹1,800.00

Total Final Gross Amount

₹11,800.00

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GST Tax Slabs in India (2026 Reference Guide)

Goods and Services Tax (GST) is categorized into distinct slabs depending on the nature of the product or service:

GST Slab	Typical Applicable Items	CGST + SGST Split
0% (Nil)	Fresh milk, fruits, vegetables, unprocessed grains, eggs	0% + 0%
3%	Gold, silver, diamonds, precious jewellery	1.5% + 1.5%
5%	Packaged food, edible oils, medicines, footwear under ₹1,000	2.5% + 2.5%
12%	Computers, hardware, frozen meat, processed foods, business software	6% + 6%
18% (Standard)	IT services, consultancy, telecom, hair oil, branded consumer goods	9% + 9%
28% (Luxury)	Motor vehicles, air conditioners, aerated drinks, high-end electronics	14% + 14%

Formula to Add GST (GST Exclusive)

Use this when you know the base selling price and need to charge GST on top:

GST Amount = (Base Price × GST%) / 100

Gross Total = Base Price + GST Amount

Example: For ₹10,000 at 18% GST: Tax = ₹1,800. Final Price = ₹11,800.

Formula to Remove GST (GST Inclusive)

Use this when the price already includes GST (e.g. MRP) and you want to extract the base value:

Base Price = (Gross Amount × 100) / (100 + GST%)

GST Amount = Gross Amount − Base Price

Example: For ₹11,800 at 18% GST: Base = ₹10,000, Tax portion = ₹1,800.

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