GST Calculator 2026 — Add or Remove GST

Enter an amount and pick the applicable rate. The calculator works both ways: add GST to a base price, or extract the GST already contained in a gross (inclusive) price.

From 22 September 2025 the GST Council’s rate rationalisation removed the 12% and 28% slabs. Most goods and services now sit at 5% or 18%, with 40% for specified demerit and luxury supplies, and concessional 3% / 0.25% rates for precious metals and rough stones.

Your details

Amount

₹

Base value if you are adding GST; total invoice value if you are removing it.

What do you want to do?

GST rate

Custom rate %

%

Use only for a rate notified for your HSN/SAC that is not in the list.

Type of supply

How it is calculated

Adding GST (exclusive amount)

GST = base amount × rate ÷ 100
Invoice total = base amount + GST

Removing GST (inclusive amount)

Base amount = total ÷ (1 + rate ÷ 100)
GST = total − base amount

Splitting the tax

Intra-State: CGST = SGST/UTGST = GST ÷ 2
Inter-State: the whole amount is IGST

Things to keep in mind

The rate depends on the HSN (goods) or SAC (services) code of the specific supply — always confirm it against the CBIC rate notification before invoicing.
Compensation cess (where still applicable, e.g. on tobacco pending cess obligations) is not included.

Frequently asked questions

After the 56th GST Council meeting the main slabs are 5% and 18%, with 40% on specified demerit and luxury supplies, nil on many essentials, and special rates of 3% (precious metals) and 0.25% (rough diamonds). The 12% and 28% slabs were withdrawn with effect from 22 September 2025.

Divide the gross amount by (1 + rate/100) to get the taxable value, then subtract it from the gross amount. For example, ₹1,180 at 18% gives a taxable value of ₹1,000 and GST of ₹180.

If the place of supply is in the same State/UT as the supplier, the tax is split equally into CGST and SGST/UTGST. For inter-State supplies (and imports) the whole amount is charged as IGST.

No. It computes the tax on a single supply. Input tax credit, reverse charge and the cess on demerit goods depend on your overall return position — talk to us for a return-level review.

Sources & official references

Rates, thresholds and limits used by this calculator were verified on 7 September 2026 and may change with a Finance Act, GST Council decision or other official notification. This page is general information, not tax or investment advice — please confirm your specific position with us before acting.

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