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Free India GST Calculator

Add or remove GST at Indian slabs with instant CGST, SGST, and IGST breakdown, supporting both the GST 2.0 and legacy rate sets.

Works offline once loaded
Rate set

Effective 22 Sep 2025

₹
GST rate
Amount type
Supply type
₹
Grand total ₹1,180.00, GST ₹180.00
Grand total (incl. GST)
₹1,180.00
18% GST · CGST + SGST · GST 2.0
Taxable base
₹1,000.00
Total GST
₹180.00
CGST @ 9%
₹90.00
SGST @ 9%
₹90.00
GST 2.0 collapses the old four slabs into 0%, 5% and 18%, with a 40% rate reserved for luxury and sin goods. Most items previously at 12% moved to 5%, but this is mapped by category, not a blanket rule — confirm your specific HSN/SAC code with a tax professional.

Estimate only — not financial or tax advice. Rate set: GST 2.0 (Effective 22 Sep 2025). All calculations run entirely in your browser; no amounts are sent anywhere.

How It Works

This calculator adds or removes Indian Goods and Services Tax (GST) at any slab and splits the tax into CGST/SGST (intra-state) or IGST (inter-state). It supports both the GST 2.0 rate set effective 22 Sep 2025 (0%, 5%, 18%, 40%) and the legacy slabs (5%, 12%, 18%, 28% plus 0.25% and 3% special rates).

  1. 1
    Pick a rate set and slab
    Toggle between GST 2.0 and Legacy, then tap a slab button or type a custom rate. The effective date of the chosen rate set is stamped on the result.
  2. 2
    Enter the amount and choose the mode
    Switch between Add GST (your amount is the pre-tax base) and Remove GST (your amount already includes tax). Optionally enter a pre-GST discount.
  3. 3
    Set intra-state or inter-state
    Intra-state supply splits the tax equally into CGST and SGST; inter-state supply shows the full IGST instead.
  4. 4
    Read and copy the breakdown
    See the taxable base, total GST, the CGST/SGST or IGST split, and the grand total in en-IN currency formatting, then copy the full breakdown with one tap.

Every calculation runs entirely in your browser. No amounts, rates, or invoice details are ever uploaded or stored.

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