GST Calculator
Calculate GST, CGST, SGST, and IGST with detailed breakdown for all tax rates.
Professional GST Calculator for Indian Businesses
The Goods and Services Tax (GST) is India's comprehensive indirect tax system that replaced multiple cascading taxes. Our GST calculator is designed to help businesses, professionals, and individuals accurately calculate GST amounts for various transactions. Whether you're preparing invoices, filing returns, or planning business expenses, this tool provides precise calculations for all GST rates including 0%, 5%, 12%, 18%, and 28%.
GST is structured as a dual system with Central GST (CGST) and State GST (SGST) for intra-state transactions, while Inter-State GST (IGST) applies to inter-state transactions. For intra-state supplies, the GST rate is split equally between CGST and SGST (e.g., 18% GST = 9% CGST + 9% SGST). For inter-state supplies, the entire GST amount is collected as IGST. Our calculator automatically determines the appropriate tax structure based on your selection.
This calculator supports both forward and reverse GST calculations. Forward calculation helps you determine the GST amount and total price when you know the base amount, while reverse calculation helps you find the base amount when you know the total GST-inclusive price. The tool is particularly useful for businesses preparing quotations, invoices, and tax compliance documentation.
Important Disclaimer: This calculator provides mathematical computations based on standard GST rates and formulas. Actual GST liability may vary based on specific goods/services classification, exemptions, input tax credits, and current tax regulations. Always consult with qualified tax professionals and refer to official GST guidelines for compliance. This tool is for informational and educational purposes only.
GST Calculation
Understanding GST Rates and Structure
Learn about different GST rates and how the tax structure works in India.
Intra-State Transactions
For transactions within the same state:
- CGST Central GST (50% of total GST rate)
- SGST State GST (50% of total GST rate)
- Example 18% GST = 9% CGST + 9% SGST
Inter-State Transactions
For transactions between different states:
- IGST Integrated GST (Full GST rate)
- No CGST/SGST Only IGST is applicable
- Example 18% GST = 18% IGST