How to Calculate GST (Inclusive & Exclusive Formula Explained)

Published: 2026-02-01 | Read Time: 4 min read

Master the exact mathematical formulas to add GST (exclusive) and remove GST (inclusive) across 5%, 12%, 18%, and 28% tax slabs in India.

Frequently Asked Questions

What are the current GST tax slabs in India?
Standard Indian GST rates are 0% (essential goods), 5%, 12%, 18% (standard services & goods), and 28% (luxury items).
How is CGST and SGST divided for intra-state sales?
For intra-state sales, the GST rate is split equally: an 18% GST invoice is billed as 9% CGST (Central) and 9% SGST (State).