🧾 Tax Utility

GST Calculator India

Calculate GST amount, net price, gross price, and CGST/SGST split for 5%, 12%, 18%, and 28% slabs.

GST Inputs

Amount

₹

GST Rate Slab

Calculation Mode

GST Breakdown

Gross Total Amount

₹0

Net Base Amount₹0

Total GST Tax₹0

CGST (Central Tax)₹0

SGST (State Tax)₹0

🔗 Related GST & Invoicing Tools

Generate compliant tax invoices or convert amounts to words in rupees:

GST Invoice Format Guide → Free GST Invoice Generator → Rupees Number to Words Converter → Income Tax Calculator (FY 2026-27) →

How Goods and Services Tax (GST) Calculations Work in India

The Goods and Services Tax (GST) is a comprehensive destination-based indirect tax levied on the manufacture, sale, and consumption of goods and services throughout India.

1. GST Calculation Formulas

GST Exclusive (Adding GST):
GST Amount = (Base Amount × GST Rate) / 100
Gross Amount = Base Amount + GST Amount
GST Inclusive (Extracting GST):
Base Amount = Gross Amount / (1 + (GST Rate / 100))
GST Amount = Gross Amount - Base Amount

2. Standard GST Slabs

5%: Mass consumption items, packaged food grains, basic transport.
12%: Processed foods, business class air tickets, medical equipment.
18%: Standard rate for most services (IT, software, professional consulting), financial services, and capital goods.
28%: Luxury vehicles, aerated drinks, and sin goods.

Official References: Learn invoicing compliance in our GST Invoice Format Guide. Sourced from CBIC and GST Portal.

Frequently Asked Questions

Q1: What is the difference between GST Inclusive and GST Exclusive?

GST Exclusive means GST is added on top of the net base amount (Gross = Base + (Base × Rate%)). GST Inclusive means the gross amount already contains the tax, so the base amount and GST must be reverse-calculated (Base = Gross / (1 + Rate%)).

Q2: How are CGST and SGST calculated on intra-state sales?

For sales within the same state, the applicable GST rate is divided equally between Central GST (CGST) and State GST (SGST). For example, an 18% GST rate is split as 9% CGST and 9% SGST.

Q3: What are the standard GST rate slabs in India?

India has four primary GST slabs: 5% (essential goods), 12% (standard goods/services), 18% (most standard services and manufactured products), and 28% (luxury and sin goods).