India GST calculator

Enter a net or gross amount and a slab. The calculator splits intra-state GST into CGST + SGST, or shows IGST for inter-state style totals. It is arithmetic, not tax advice and not a filing tool.

Rates and rules change. Confirm the current slab for your HSN/SAC with a CA before you invoice.

How to Use

  1. Enter the taxable amount (exclusive) or the final amount (inclusive).
  2. Choose 5, 12, 18, or 28 percent — or the custom rate if your case needs it.
  3. Read CGST/SGST vs IGST. Use IGST thinking for inter-state supplies; CGST+SGST for intra-state.
  4. Copy the breakdown into your invoice draft. Double-check rounding (paise).

Key Features

  • Inclusive and exclusive modes
  • Standard Indian slabs plus custom rate
  • CGST, SGST, and IGST split
  • No data sent to FlashKit

Frequently Asked Questions

Is this official GST software?

No. It is a helper calculator. GSTN portals and your accountant remain the source of truth.

Does it handle cess or composition scheme?

Not automatically. Add cess manually if it applies.

Related Tools