GST Suite
Calculate IGST for inter-state transactions.
Calculate IGST for inter-state transactions in India. Find the Integrated GST amount for goods and services sold across state borders - free online calculator.
IGST (Inter-State Supply)
Purpose
Calculates Integrated GST (IGST) for sales between states.
Formula
IGST = (Original Price × GST Rate) ÷ 100What is IGST?
The IGST Calculator determines the Integrated Goods and Services Tax applicable to inter-state sales, exports, and special economic zone (SEZ) supplies across state borders in India.
How It Works
Worked Example
A software firm in Karnataka bills an enterprise client in Maharashtra for ₹20,000 at 18% GST. Full IGST of ₹3,600 is charged on the invoice.
When to Use This
Use when billing clients located outside your home state or executing import/export supply agreements.
Why Use This Tool?
Charging CGST/SGST on an interstate transaction prevents your client from claiming input tax credit in their home state, causing invoice rejections and delayed payments.
Data privacy is guaranteed: all calculations run directly in your browser session and are never stored or shared with external parties.
Frequently Asked Questions
When is IGST applied?
IGST (Integrated Goods and Services Tax) is applied on inter-state supply of goods and services - i.e., when the buyer and seller are in different states. The full GST goes to the central government.