What is the difference between CGST, SGST and IGST?

A supply inside one state usually splits GST into CGST (centre) and SGST (state). A supply from one state to another is IGST at the same headline rate.

Is there one GST rate for everything?

No. Rates are scheduled by HSN/SAC. This calculator never assumes a default universal rate.

How do I remove GST from an inclusive price?

Taxable value = inclusive ÷ (1 + rate/100). GST is the difference. Example: ₹118 at 18% → taxable ₹100.

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GST Calculator

Free GST calculator for India — add or remove GST and split CGST/SGST or IGST at the rate you choose.

Last updated 2026-09-17 · GST rates after 22 Sep 2025 (GST Council 56th meeting)

Amount₹Does this amount already include GST?GST rate (pick the HSN/SAC rate — not a guess)Place of supply (simplified)

There is no universal GST rate. After 22 Sep 2025 most goods sit on 5%, 18% or 40% schedules; special rates still exist. Confirm on the CBIC rate finder.

Taxable value

₹10,000.00

GST

₹1,800.00

CGST

₹900.00

SGST / UTGST

₹900.00

Invoice total

₹11,800.00

How it works

Select the GST rate that applies to your HSN/SAC from the notified schedules. Exclusive prices add tax; inclusive prices reverse tax using CGST Rule 35. Intra-state supplies split the tax equally into CGST and SGST; inter-state supplies show IGST.

How to use this calculator

Enter the inputs shown above (amount, rate, tenure, income, or other fields).
Read the live results — they update as you type.
Check the formula, worked example, and assumptions on this page before you decide.

Formula

Exclusive: GST = amount × rate / 100. Inclusive (Rule 35): GST = inclusive × rate / (100 + rate). Intra-state: CGST = SGST = GST / 2. Inter-state: IGST = GST.

Worked example

₹1,000 exclusive at 18% intra-state: GST ₹180 (CGST ₹90 + SGST ₹90), invoice ₹1,180.

Reading the result

Treat the output as a planning figure. Compare it with your sanction letter, payslip, or GST invoice rather than treating it as a filing or a loan offer.

Read the full guide

See also: calculation methodology and disclaimer.

Frequently asked questions

On an exclusive price, multiply taxable value by the notified rate. On an inclusive MRP, reverse the tax with Rule 35: tax = inclusive × rate / (100 + rate).

Assumptions and limits

You must pick the correct rate. Most goods moved to 5% / 18% / 40% from 22 Sep 2025; special and residual schedules still exist.
Place of supply is simplified to intra vs inter. UTGST is treated like SGST.
Compensation cess, reverse charge, and discount-before-tax rules are not modelled.

Results are educational estimates, not tax, legal, investment, or medical advice, and not a loan offer. Verify filings and payments with the official authority or a qualified professional.

Sources

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