GST Suite
Calculate GST amount on any price.
Calculate the GST amount to add to a base price. Supports all GST slabs (5%, 12%, 18%, 28%). Free online GST calculator for Indian businesses.
GST Amount (Add GST)
Purpose
Calculates the GST amount to be added to the original (taxable) price.
Formula
GST Amount = (Original Price × GST Rate) ÷ 100What is GST Amount?
The GST Amount Calculator calculates the exact Goods and Services Tax amount to add to a base transaction value based on standard Indian GST tax slabs (0%, 5%, 12%, 18%, 28%).
How It Works
Worked Example
You supply professional consulting services for a base price of ₹40,000. At the 18% slab, GST Amount = ₹40,000 × 18% = ₹7,200. Total invoice amount payable by the client = ₹47,200.
When to Use This
Use when creating commercial B2B quotations, proforma invoices, and client billing statements where rates are negotiated exclusive of tax.
Why Use This Tool?
Incorrect GST calculation results in under-billing clients or paying statutory tax out of your own profit margin. Instant verification guarantees compliant, error-free invoicing.
Data privacy is guaranteed: all calculations run directly in your browser session and are never stored or shared with external parties.
Frequently Asked Questions
How do you calculate GST amount?
GST Amount = Base Price × GST Rate / 100. For example, on ₹1,000 at 18% GST: GST = ₹1,000 × 18/100 = ₹180. Total price = ₹1,180.
What are the GST slabs in India?
India has four GST slabs: 5% (essentials), 12% (processed foods, business services), 18% (most goods and services), and 28% (luxury goods, demerit goods).