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GST calculator

Live

Add / remove GST, with intra-state CGST+SGST or inter-state IGST split.

What you get
  • Forward + reverse computation
  • All 7 standard rates
  • Auto CGST+SGST vs IGST switch
  • Reference card of common rates
Overview

What it is.

Compute GST forward (base → gross) or reverse (gross → base) across all standard rates. Picks CGST+SGST split for intra-state supply and IGST for inter-state automatically.

Includes a reference card of common Indian GST rates by goods/services category.

How it works

Three steps.
End to end.

01
1. Pick direction

Add GST or strip it out.

02
2. Enter base + rate + states

Seller and buyer state drive the intra-state vs inter-state determination.

03
3. See the breakdown

Net, CGST/SGST or IGST, total — split out per CGST Act §9 / IGST Act §5.

Capabilities

What you get.

  • Forward + reverse computation
  • All 7 standard rates
  • Auto CGST+SGST vs IGST switch
  • Reference card of common rates
FAQ

Quick answers.

Does it handle composite or mixed supply?

Not in the free tool — those require AI reasoning. Tax AI handles them.

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