About the GST Calculator

The Goods and Services Tax (GST) is a comprehensive indirect tax levied on the supply of goods and services in India. Our GST Calculator is designed to help you quickly compute the tax amount on your sales or purchases, ensuring accuracy and compliance with India's tax regulations. Whether you're a business owner, a service provider, or a consumer, this tool simplifies complex calculations for you.

This calculator is updated with the latest GST rate changes announced and effective from September 22, 2025, which simplified the structure to primarily 0%, 5%, and 18% slabs, with a special rate of 40% for luxury and sin goods.

The GST Calculation Formulas

Understanding the formula behind the calculation can help you verify the results. There are two primary scenarios when calculating GST:

1. Adding GST to a Base Amount (GST Exclusive)

When you have a base price and need to find the final price including GST, the formula is:

2. Extracting GST from a Total Amount (GST Inclusive)

When you have a final price that already includes GST and need to find the original cost and the tax component, the formula is:

Understanding GST Components (CGST, SGST, IGST)

GST in India has three main components to ensure a clear distribution of revenue between the central and state governments:

• CGST (Central GST): This portion of the tax is collected by the Central Government on intra-state (within the same state) transactions.
• SGST (State GST): This is collected by the State Government for intra-state transactions. For any transaction within a state, both CGST and SGST are levied. If the total GST rate is 18%, then 9% will be CGST and 9% will be SGST.
• IGST (Integrated GST): This tax is levied by the Central Government on all inter-state (between different states) transactions and on imports. The IGST rate is equal to the sum of CGST and SGST rates.

Our calculator automatically shows the breakdown of CGST and SGST for your convenience.

Frequently Asked Questions (FAQ)

What are the latest GST slabs in India?

Effective September 22, 2025, India has simplified its GST structure. The main slabs are now 0% (exempt), 5%, and 18%. A special rate of 40% applies to luxury items and "sin goods" like tobacco and aerated beverages. The previous 12% and 28% slabs have been removed.

What is the difference between GST-inclusive and GST-exclusive amounts?

A GST-exclusive amount is the base price of a product or service before any tax is added. A GST-inclusive amount is the final price paid by the customer, which already includes the GST.

Who is liable to pay GST in India?

Generally, a business becomes liable to pay GST when its aggregate turnover exceeds ₹20 lakhs in a financial year (or ₹10 lakhs for special category states). However, registration is mandatory for businesses making any inter-state supplies, regardless of turnover.

How are imports and exports treated under GST?

Imports of goods and services are treated as inter-state supplies and are subject to IGST. Exports are considered "zero-rated supplies," meaning no GST is payable on them, and exporters can claim a refund on the input tax credit (ITC) they've paid.

What items are cheaper under the new GST rates?

Many items have become more affordable. For example, consumer durables like TVs, air conditioners, and refrigerators, as well as small cars and cement, have moved from the 28% slab to 18%. Daily essentials like hair oil, soap, and toothpaste have shifted from 18% to 5%. Additionally, individual life and health insurance policies are now exempt from GST.