Free GST Calculator India - Calculate GST Online Instantly

Easily calculate GST on your invoices, sales, or purchases in seconds.

Use the EnKash GST Calculator to add or remove GST from any amount and see the taxable value, total GST and final invoice value instantly. For intra-state supplies, you can split the tax into CGST and SGST. For inter-state supplies, you can view the IGST amount.

How to Use the EnKash GST Tax Calculator

Calculating GST with EnKash is fast and simple — just follow these 3 steps:

Enter the amount you want to calculate.
Choose whether the amount is GST-exclusive or GST-inclusive.
Select the applicable GST rate.
View the taxable value, GST amount, tax split, and final invoice value.

The calculator performs the arithmetic. You still need to confirm the correct GST rate, HSN or SAC classification, and place-of-supply treatment for the actual transaction.

GST Calculation Formula

GST Amount = (Original Cost × GST Rate) /100

Total Amount = Original Cost + GST Amount

Types of GST in India

Type	Description	Levied By
CGST (Central GST)	Collected on intra-state supplies	Central Government
SGST (State GST)	Collected on intra-state supplies	State Government
IGST (Integrated GST)	Applied to inter-state supplies & imports	Central Government
UTGST (Union Territory GST)	Applied in Union Territories	Union Territory Administration

1. Central Goods and Services Tax (CGST)

CGST is imposed by the Central Government on the intra-state supply of goods and services. It is collected along with SGST, and both taxes are charged at equal rates on the same transaction value.

2. State Goods and Services Tax (SGST)

SGST is levied by the State Government on intra-state sales of goods and services. The revenue collected through SGST directly benefits the respective state, ensuring local development and fair distribution of tax proceeds.

3. Integrated Goods and Services Tax (IGST)

IGST is applied on inter-state transactions of goods and services, including imports into India. The Central Government collects IGST and later distributes the revenue between the Centre and destination states to avoid double taxation.

4. Union Territory Goods and Services Tax (UTGST)

UTGST is applicable to the intra-territory supply of goods and services within India’s Union Territories, such as Delhi, Chandigarh, and Puducherry. It functions like SGST but is governed by the Union Territory administration instead of a state government.

GST component	Typical application	How the tax appears
CGST + SGST	Intra-state supply within a state	The total GST rate is generally split equally between CGST and SGST.
CGST + UTGST	Intra-Union Territory supply in an applicable Union Territory without a legislature	The total GST rate is generally split between CGST and UTGST.
IGST	Inter-state supplies and specified cross-border / import situations	The full GST rate is charged as IGST.

Current GST Rate Structure in India in 2026

India’s GST rate structure was rationalised following the 56th GST Council meeting. The broad structure now centres on a 5% merit rate and an 18% standard rate, with a special 40% demerit rate for selected goods and services. Nil or exempt supplies and other specifically notified rates also continue to exist.

For a detailed list of changes, see Types of GST Rates in India: New Rate List and Updates.

New GST Rates in India

Rate category	How to use it in the calculator
Nil / exempt	Use 0% only when the supply is actually nil-rated or exempt under the applicable notification.
5% merit rate	Use when the relevant goods or services are notified at 5%.
18% standard rate	Use when the relevant goods or services are notified at 18%.
40% special demerit rate	Use only for supplies specifically notified at the special 40% rate.
Other / historical rates	Use Custom and verify the rate that applied on the date of supply. Older invoices may still require historical rates such as 12% or 28%.

(Source: GST Council India – Central Board of Indirect Taxes and Customs as of October 2025)

What Is Reverse GST Calculation?

Reverse GST calculation means finding the taxable value and GST amount inside a price that already includes GST. It is useful when you know the final invoice value or MRP but need to separate the tax component.

Formula: Taxable value = GST-inclusive amount × 100 ÷ (100 + GST rate)

Example: ₹11,800 including 18% GST contains a taxable value of ₹10,000 and GST of ₹1,800.

Reverse GST Is Different From Reverse Charge Mechanism (RCM)

These terms are sometimes confused, but they refer to different things. Reverse GST is a mathematical calculation used to remove GST from an inclusive price. The Reverse Charge Mechanism is a tax rule under which the recipient becomes liable to pay GST in specified cases.

If you need the compliance rules, read Reverse Charge Mechanism (RCM) in GST.

How to Find the Correct GST Rate Before You Calculate

Start with the classification of the goods or services. The applicable rate depends on the relevant HSN code for goods or SAC classification for services, along with current notifications and any exemption that may apply.

For goods, use theHSN Code in India guide to understand how product classification works. Then cross-check the rate against thecurrent GST rate guide and official GST Council or CBIC notifications.

Where a GST Calculator Helps

A GST calculator is useful when you need a quick arithmetic check before preparing or reviewing a transaction. Common uses include:

Adding GST to quotations and price lists
Removing GST from tax-inclusive prices
Checking the tax amount on purchase and sales invoices
Comparing totals at different notified rates
Splitting intra-state GST into CGST and SGST
Checking the IGST amount on an inter-state supply

If you are preparing the final document, see How to Create a GST Bill for invoice fields and rules.

Frequently Asked Questions (FAQs)

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01. What is the full form of GST?

GST stands for Goods and Services Tax, a unified indirect tax system in India introduced on 1 July 2017. It replaced multiple state and central taxes to create a single national tax framework.

02. How many types of GST are there in India?

There are four types of GST in India — CGST, SGST, IGST, and UTGST. Each applies differently based on whether the transaction happens within a state or across states or union territories.

03. What are the current GST rates in India (2025)?

The GST rates are divided into five main slabs — 0%, 5%, 12%, 18%, and 28%. Essential items like milk are at 0%, most services fall under 18%, while luxury goods attract 28% plus cess.

04. Who must register for GST in India?

Any business with an annual turnover above ₹40 lakhs (goods) or ₹20 lakhs (services) must register for GST. For Northeastern and hilly states, the limit is ₹20 lakhs and ₹10 lakhs, respectively.

05. How do I calculate GST on a product or service?

You can use this formula: GST Amount = (Original Cost × GST Rate) / 100.

Example: ₹10,000 at 18% GST = ₹1,800.
Our Free GST Calculator does this instantly with accurate CGST–SGST–IGST splits.

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

CGST & SGST are levied on intra-state supplies and shared between the Centre and State. IGST applies to inter-state supplies or imports and is collected by the Central Government.

07. What are GST-inclusive and GST-exclusive prices?

GST-Inclusive Price: The tax is already included in the displayed price. GST-Exclusive Price: GST is added separately to the base amount before billing.

08. How to calculate reverse GST?

To calculate reverse GST, select the applicable GST rate and enter the GST-inclusive amount. The calculator automatically derives the tax-free base value and GST amount, helping businesses handle reverse charge transactions correctly.

09. Is reverse GST the same as Reverse Charge Mechanism?

No. Reverse GST removes the tax component from an inclusive price. RCM is a GST rule that makes the recipient liable to pay tax in specified cases.

Type

Description

Levied By

CGST (Central GST)

Collected on intra-state supplies

Central Government

SGST (State GST)

Collected on intra-state supplies

State Government

IGST (Integrated GST)

Applied to inter-state supplies & imports

Central Government

UTGST (Union Territory GST)

Applied in Union Territories

Union Territory Administration

GST component

Typical application

How the tax appears

CGST + SGST

Intra-state supply within a state

The total GST rate is generally split equally between CGST and SGST.

CGST + UTGST

Intra-Union Territory supply in an applicable Union Territory without a legislature

The total GST rate is generally split between CGST and UTGST.

IGST

Inter-state supplies and specified cross-border / import situations

The full GST rate is charged as IGST.

Rate category

How to use it in the calculator

Nil / exempt

Use 0% only when the supply is actually nil-rated or exempt under the applicable notification.

5% merit rate

Use when the relevant goods or services are notified at 5%.

18% standard rate

Use when the relevant goods or services are notified at 18%.

40% special demerit rate

Use only for supplies specifically notified at the special 40% rate.

Other / historical rates

Use Custom and verify the rate that applied on the date of supply. Older invoices may still require historical rates such as 12% or 28%.

Free GST Calculator India - Calculate GST Online Instantly

How to Use the EnKash GST Tax Calculator

GST Calculation Formula

Types of GST in India

1. Central Goods and Services Tax (CGST)

2. State Goods and Services Tax (SGST)

3. Integrated Goods and Services Tax (IGST)

4. Union Territory Goods and Services Tax (UTGST)

Current GST Rate Structure in India in 2026

New GST Rates in India

What Is Reverse GST Calculation?

Reverse GST Is Different From Reverse Charge Mechanism (RCM)

How to Find the Correct GST Rate Before You Calculate

Where a GST Calculator Helps

Frequently Asked Questions (FAQs)

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Free GST Calculator India - Calculate GST Online Instantly

How to Use the EnKash GST Tax Calculator

GST Calculation Formula

Types of GST in India

1. Central Goods and Services Tax (CGST)

2. State Goods and Services Tax (SGST)

3. Integrated Goods and Services Tax (IGST)

4. Union Territory Goods and Services Tax (UTGST)

Current GST Rate Structure in India in 2026

New GST Rates in India

What Is Reverse GST Calculation?

Reverse GST Is Different From Reverse Charge Mechanism (RCM)

How to Find the Correct GST Rate Before You Calculate

Where a GST Calculator Helps

Frequently Asked Questions (FAQs)

Related Resources

What is Input Tax Credit (ITC) in GST? Meaning, Rules, and Eligibility

How to Register for GST in India | Step-by-Step GST Registration Guide

Types of GST Returns and Their Filing Due Dates (2026)

Related Resources

What is Input Tax Credit (ITC) in GST? Meaning, Rules, and Eligibility

How to Register for GST in India | Step-by-Step GST Registration Guide

Types of GST Returns and Their Filing Due Dates (2026)