GST Calculator India

Add GST to a base price or pull it out of a GST-inclusive total, with the CGST/SGST or IGST split shown automatically. On a ₹10,000 intra-state sale at 18%, GST is ₹1,800 — CGST ₹900 + SGST ₹900 — for a ₹11,800 total. Uses the GST 2.0 slabs: 0%, 5%, 18%, and 40%.

Mode

GST rate

Supply type

Base price (₹)

₹10,000.00

Base price

₹1,800.00

GST (18%)

₹11,800.00

Total price

Split as CGST ₹900.00 + SGST ₹900.00 (half each).

GST 2.0 (from 22 September 2025) uses four slabs: 0%, 5%, 18%, and 40%. The old 12% and 28% slabs were abolished — most 12% items moved to 5% or 18%, and most 28% items to 18%, with 40% reserved for sin and luxury goods. Which slab a product falls under is set by the GST Council; check the CBIC rate schedule if unsure. Not tax advice.

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Why use GST Calculator India?

India's GST moved to a simplified four-slab structure — 0%, 5%, 18%, and 40% — when the GST 2.0 reform took effect on 22 September 2025. This calculator implements that current structure along with the mechanic that trips people up most: the split between CGST/SGST and IGST. Within a state, an 18% tax is invoiced as 9% CGST plus 9% SGST; across state lines it's a single 18% IGST line. The totals match, but invoices must show the right components, and the tool picks them for you based on the supply type. Reverse mode handles the equally common problem of GST-inclusive prices: MRPs, restaurant bills, and retail receipts already contain the tax, and backing it out requires dividing by 1.18 (at the standard rate) rather than subtracting 18%. Amounts display in Indian grouping (₹1,00,000 style) and round to the paisa. Which slab applies to a given product is decided by the GST Council and published by CBIC — the calculator does the arithmetic once you know the rate.

Key benefits

Current GST 2.0 slabs — not the abolished 12%/28% structure
Automatic CGST/SGST vs IGST split
Forward and reverse (GST-inclusive) modes
Indian number formatting (lakh/crore grouping)
Runs entirely in your browser, no signup

Features

Four slab presets: 0%, 5%, 18%, 40%
Intra-state and inter-state supply handling
Reverse calculation for MRP and invoice totals
Paise-accurate rounding

Popular use cases

Invoicing with the correct CGST/SGST split
Checking how much GST is inside an MRP or restaurant bill
Quoting inter-state B2B prices with IGST
Comparing a price at 5% vs 18% after the GST 2.0 reclassification

How to use GST Calculator India

1
Pick a mode
Add GST if you have the base price, or extract GST if your figure is already GST-inclusive (an MRP or invoice total).
2
Choose the slab
5% for essentials, 18% standard, 40% sin/luxury, or 0% for exempt items — per the GST 2.0 structure in force since 22 September 2025.
3
Set the supply type
Intra-state sales split the tax into equal CGST and SGST halves; inter-state sales charge a single IGST line.
4
Read the breakdown
Base price, GST amount, total, and the CGST/SGST or IGST split update instantly.

Frequently asked questions

What are the current GST rates in India?

Since GST 2.0 took effect on 22 September 2025 there are four slabs: 0% (exempt), 5% (essentials and most former 12% items), 18% (the standard rate covering most goods and services), and 40% (sin and luxury goods such as tobacco and pan masala). The old 12% and 28% slabs were abolished.

What happened to the 12% and 28% GST slabs?

They were removed in the GST 2.0 reform. Most items previously at 12% moved down to 5% or up to 18%, and most 28% items moved to 18%, with only sin/luxury goods going to the new 40% rate. If you're still quoting 12% or 28%, check the current CBIC schedule for your item.

What is the difference between CGST, SGST, and IGST?

On a sale within one state, the GST is split equally: half goes to the centre as CGST and half to the state as SGST — 9% + 9% on an 18% item. On a sale between states, the full amount is charged as a single IGST line instead. The total tax is identical either way.

How do I remove GST from an MRP?

Use extract mode: the tool divides the GST-inclusive price by 1 plus the rate. A ₹11,800 total at 18% contains ₹1,800 of GST on a ₹10,000 base — note that simply taking 18% of ₹11,800 (₹2,124) overstates it.

Is my data sent anywhere?

No. The calculation runs entirely in your browser.

Last reviewed: August 2026

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