GST business utility

GST Calculator — Inclusive, Exclusive, CGST, SGST and IGST

Calculate GST-exclusive or GST-inclusive values and split tax between CGST–SGST or IGST.

Calculate GST from taxable or inclusive value

Enter separately because compensation/HSNS cess depends on the notified product and valuation basis.

Tax calculation

Taxable value
—
Invoice total
—
ComponentAmount
Total GST—
CGST—
SGST / UTGST—
IGST—
Cess entered—

How This Is Calculated

GST can be calculated two ways: adding GST to a base amount ("exclusive"), or extracting the embedded GST from a GST-inclusive total ("inclusive") using tax/(1+rate). For intra-state supplies, the GST amount splits equally into CGST and SGST; for inter-state supplies, the full amount is charged as IGST. Common GST slabs in India are 5%, 12%, 18% and 28%, with some goods attracting additional compensation cess.

Frequently Asked Questions

What is the difference between GST-inclusive and GST-exclusive amount? ▼
A GST-exclusive amount is the base price before tax is added — GST is calculated on top of it. A GST-inclusive amount already has tax built in, so the GST portion has to be extracted from the total using the formula: GST = total − total/(1+rate).
When do I charge CGST + SGST versus IGST? ▼
CGST (Central GST) and SGST (State GST) apply in equal halves for intra-state supplies, where the supplier and the place of supply are in the same state. IGST (Integrated GST) applies as a single tax for inter-state supplies, where the supplier and place of supply are in different states, or for imports/exports.
What are the common GST rate slabs in India? ▼
The most common GST slabs are 5%, 12%, 18% and 28%, with certain essential goods at 0% (nil-rated) and some luxury/sin goods attracting an additional compensation cess on top of the 28% slab. The applicable rate depends on the HSN/SAC classification of the goods or service.
How do I calculate GST on an MRP that already includes tax? ▼
Since MRP is GST-inclusive, use the inclusive method: taxable value = MRP ÷ (1 + GST rate), and GST amount = MRP − taxable value. Switch the calculator to "inclusive" mode and enter the MRP as the amount.

Source and review trail

Use the current official instrument, portal or regulator publication before acting. This panel separates the category authority from page-specific references.

Official starting point
www.gstcouncil.gov.in

Related guidance: GST Place of Supply for Consulting Services Across States: IGST vs CGST/SGST Guide | Finin2min · Place of Supply for Services: The Billing Error That Creates IGST/CGST-SGST Risk | Finin2min

Methodology, assumptions and sources

Scope: Computes GST amount and total price for both tax-inclusive and tax-exclusive scenarios, and splits the tax into CGST+SGST (intra-state) or IGST (inter-state), based on the applicable rate.

Calculation logic

  1. Exclusive mode: GST amount = Base price × Rate ÷ 100; Total price = Base price + GST amount.
  2. Inclusive mode: Base price = Total price × 100 ÷ (100 + Rate); GST amount = Total price − Base price.
  3. Intra-state supply: split the computed GST amount equally into CGST and SGST (each at half the total rate); Inter-state supply: the full computed amount is IGST.

Inputs and assumptions

Exclusions and edge cases

Sources

Review status: reviewed and approved by CA Nikhil Gupta on 5 July 2026.

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