SwiftCalc

GST Calculator

Add or remove Goods and Services Tax (GST) from any base amount. Find CGST and SGST splits for tax compliance and invoice auditing.

Calculator Inputs
₹100₹50L

The base amount to calculate tax on.

%
1%40%
Results
Original Price10,000
GST Amount (18%)1,800
Net Price11,800

CGST and SGST Split breakdown

Net Price₹11,800
Base Amount
84.7%10,000
CGST (Central Tax)
7.6%900
SGST (State Tax)
7.6%900

Indian GST Split Summary

Under intra-state GST tax rules, the CGST component of 900 (9%) goes to the Central Government, and the SGST component of 900 (9%) goes to the State Government.
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How to use GST Calculator

  • Select Mode: Toggle between 'Add GST' to calculate the tax on top of your base price, or 'Remove GST' to calculate the pre-tax base amount from an inclusive price.
  • Enter base amount: Specify the net or gross amount (e.g., ₹10,000) inside the input slider.
  • Select Tax Slab: Pick from Indian standard GST rates (5%, 12%, 18%, 28%) or drag the slider to use a custom percentage.

What is Goods and Services Tax (GST)?

The Goods and Services Tax (GST) is a unified, destination-based indirect tax levied on the supply of most goods and services in India. Launched on July 1, 2017, it replaced a complex web of state and central taxes such as VAT, Service Tax, Central Excise, and Octroi. It aims to create a single common market and remove the cascading effect of double taxation.

GST Calculation Formula

The mathematical formula depends on whether you are adding or removing the tax:

To Add GST: GST Amount = P × [ R / 100 ] | Net Amount = P + GST Amount
To Remove GST: Base Amount = P / [ 1 + (R / 100) ] | GST Amount = P - Base Amount

P: The input price or base value

R: The GST tax rate percentage

Example Calculation

Suppose you buy a laptop for ₹50,000 (pre-tax) and the tax slab is 18%:

  • GST Amount = 50,000 × (18 / 100) = ₹9,000
  • Total Net Price = 50,000 + 9,000 = ₹59,000
  • CGST = ₹4,500 (9%) and SGST = ₹4,500 (9%)

GST Breakdowns for Common Taxable Goods

Typical tax slabs and applicability for common transactions in India:

GST RateCommon ApplicabilityCGST ComponentSGST Component
5%Sugar, Tea, Coffee, Edible Oils, Coal2.5%2.5%
12%Butter, Ghee, Almonds, Fruit Juices, Prepared Foods6.0%6.0%
18%Capital Goods, Computers, IT Services, Toiletries9.0%9.0%
28%Luxury items, Motor Cars, Tobacco, Aerated Drinks14.0%14.0%

Benefits of Using our GST Calculator

  • Dual Mode Options: Allows you to determine the exact pre-tax and post-tax values at the click of a button.
  • Automatic CGST/SGST Splits: Calculates the precise intra-state divisions required for commercial accounting and tax compliance.
  • Speed & Convenience: Eliminates manual math errors during invoicing, billing, or shopping.
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Frequently Asked Questions

What is GST?

Goods and Services Tax (GST) is an indirect tax used in India on the supply of goods and services. It is a destination-based tax levied on every value addition, replacing multiple former indirect taxes like excise duty, VAT, and services tax.

How do I calculate GST on my own?

To Add GST: GST Amount = Original Cost * (GST% / 100), and Net Price = Original Cost + GST Amount. To Remove GST: Original Cost = Net Price / (1 + (GST% / 100)), and GST Amount = Net Price - Original Cost.

What are CGST and SGST?

Under dual GST in India, for intra-state transactions (within the same state), GST is split equally between the Central Government as CGST (Central GST) and the State Government as SGST (State GST). For inter-state transactions, a single IGST (Integrated GST) is charged by the Centre.

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