GST Calculator - Goods and Services Tax Calculator

Calculate GST amount instantly with our free GST calculator. Add or remove GST at all tax slabs (5%, 12%, 18%, 28%) with CGST, SGST, IGST breakup in India.

Calculate Now

Calculate GST Amount
₹10,000.00
₹100₹10,00,000
Amount Breakdown
Total₹11,800
Base Amount
₹10,000
GST Amount
₹1,800

Base Amount

₹10,000.00

GST Amount (18%)

₹1,800.00

Total Amount

₹11,800.00

GST Breakup

CGST (9%)

₹900.00

SGST (9%)

₹900.00

IGST (18%)

₹1,800.00

CGST + SGST for intra-state | IGST for inter-state transactions

Base Amount vs GST15.3% GST
Base
GST

Save this GST calculation for your records

Download & Share Results
WhatsApp
Twitter
Facebook

What is GST?

Goods and Services Tax (GST) is a comprehensive indirect tax levied on the supply of goods and services in India. Implemented on July 1, 2017, GST replaced multiple cascading taxes like VAT, service tax, excise duty, and others with a single unified tax system. GST is applied at each stage of the supply chain with input tax credit mechanism.

GST is a destination-based tax, meaning the tax revenue goes to the state where goods or services are consumed. This creates a unified national market and eliminates the tax-on-tax (cascading) effect of the previous system.

GST Tax Slabs in India

GST in India has a multi-tier structure with four main tax rates:

GST RateApplicable On
5%Essential items, economy rail travel, small restaurants
12%Processed food, computers, mobile phones
18%Most goods & services, restaurants with AC, IT services
28%Luxury items, cars, cement, tobacco, aerated drinks

Additionally, there is a 0% rate for essential commodities like fresh food, milk, and healthcare services.

How to Calculate GST

GST can be calculated in two ways depending on whether the price is GST-exclusive or GST-inclusive:

GST Exclusive (Add GST):

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

GST Inclusive (Remove GST):

Original Price = Total Price × (100 / (100 + GST Rate))

Types of GST

  • CGST (Central GST): Tax collected by Central Government on intra-state sales
  • SGST (State GST): Tax collected by State Government on intra-state sales
  • IGST (Integrated GST): Tax collected by Central Government on inter-state sales
  • UTGST (Union Territory GST): Tax for Union Territories without legislature

For intra-state transactions, GST is split equally between CGST and SGST. For inter-state transactions, only IGST is charged.

Example GST Calculation

Scenario: Purchase of ₹10,000 at 18% GST (Intra-state)

  • Original Amount: ₹10,000
  • GST (18%): ₹1,800
  • CGST (9%): ₹900
  • SGST (9%): ₹900
  • Total Amount: ₹11,800

Benefits of GST

  • Eliminates Cascading: Input Tax Credit prevents tax-on-tax
  • Simplified Tax: One nation, one tax replaces multiple taxes
  • Unified Market: Seamless movement of goods across states
  • Transparency: Online filing and tracking through GST portal
  • Reduced Compliance: Single return instead of multiple filings

Frequently Asked Questions

To add GST: Multiply the original price by (GST Rate/100) and add to original. Example: ₹1,000 at 18% GST = ₹1,000 + (₹1,000 × 0.18) = ₹1,180. To remove GST from inclusive price: Divide by (1 + GST Rate/100). ₹1,180 ÷ 1.18 = ₹1,000 original price.

CGST (Central GST) and SGST (State GST) are charged equally on intra-state transactions (within same state). IGST (Integrated GST) is charged on inter-state transactions (between states). If GST is 18%: Intra-state = 9% CGST + 9% SGST; Inter-state = 18% IGST.

Input Tax Credit (ITC) allows businesses to claim credit for GST paid on purchases against GST collected on sales. This prevents cascading tax effect. For example, if you pay ₹1,800 GST on raw materials and collect ₹3,000 GST on sales, you only remit ₹1,200 to the government.

GST registration is mandatory for: businesses with turnover exceeding ₹40 lakhs (₹20 lakhs for services), inter-state suppliers, e-commerce operators, those making taxable supplies on behalf of others. Composition scheme is available for small businesses under ₹1.5 crore turnover.

Items exempted from GST include: fresh fruits, vegetables, milk, bread, eggs, fresh meat, fish, healthcare services, educational services, public transport, agricultural services, postal services, and books/newspapers. These are charged 0% GST.
Disclaimer

This calculator is provided for informational purposes only. The results are estimates and should not be considered as financial advice. Actual values may vary based on various factors. Please consult a certified financial advisor before making any financial decisions.

Related Calculators

Business Loan EMI CalculatorFD CalculatorSIP CalculatorHome Loan EMI Calculator

Quick Tips

  • Use the sliders for quick adjustments
  • Compare different scenarios to find the best option
  • Download PDF to save your calculations
  • Share results with family for financial planning