About 18% GST Calculator
The 18% GST slab is the standard rate applicable to over 70% of commercial goods and almost all professional B2B services in India.
Items and services taxed at 18% include IT consulting, software development (SAC 9983), web hosting, laptops, smartphones, telecom services, capital machinery, TMT steel bars, financial services, and AC restaurant dining.
Use this calculator to add 18% GST to your base price or reverse-calculate the pre-tax base amount from an 18% GST inclusive total.
18% GST Calculation Formula
18% GST Amount = Base Amount × 0.18Base Amount = Total Price × 100 ÷ 118For intra-state sales, 18% GST splits into 9% CGST and 9% SGST. For inter-state sales, 18% full IGST applies.
Example: 18% GST on IT Consulting Services (₹10,000 Base)
A software company invoices a client ₹10,000 for web application development.
The client pays ₹11,800. The ₹1,800 tax component can be claimed as Input Tax Credit (ITC) by a registered business.