GST Calculator — Add or Remove GST (2.0 Slabs)
Enter an amount, pick the correct slab, and go either direction: add GST to an exclusive price, or remove GST from an inclusive price to find the tax hidden inside it. Uses the new post-Sept-2025 slabs (5%, 18%, 40%) — the old 12% and 28% rates no longer exist. 100% private — everything is computed in your browser.
Result
Gross amount (incl. GST)
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- CGST (half of GST)
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- SGST (half of GST)
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Net vs GST
How the gross amount breaks down
GST 2.0 slabs — explained simply
India's GST was rationalized into a simpler structure: the slabs currently in force are 0%, 5%, 18% and 40%. The older 12% and 28% slabs were merged away in the post-September-2025 overhaul — essentials sit at 0% or 5%, most goods and services at 18%, and a higher 40% slab applies to sin and luxury goods. Whatever the rate, the math is identical: GST is charged as a percentage of the pre-tax (exclusive) price.
CGST + SGST vs IGST, in one line: on a sale within one state, the GST is split equally between the Centre (CGST) and the state (SGST) — the half-each split shown above; on a sale across state borders, the same total is collected as a single tax called IGST.
Inclusive vs exclusive pricing: an exclusive price is quoted before GST — add GST to get what the customer actually pays. An inclusive price already has GST baked in (most MRPs are inclusive) — remove GST to recover the base price and the tax hidden inside it. The mode toggle above takes you in either direction.
Worked examples
Example 1 — Add 18% GST to ₹10,000
| Step | Value |
|---|
| Net amount (exclusive) | ₹10,000.00 |
| Gross = 10,000 × 1.18 | ₹11,800.00 |
| GST = 11,800 − 10,000 | ₹1,800.00 |
| CGST = SGST = 1,800 ÷ 2 | ₹900.00 each |
Example 2 — Remove 18% GST from ₹11,800 (inclusive)
| Step | Value |
|---|
| Inclusive amount (entered) | ₹11,800.00 |
| Net = 11,800 ÷ 1.18 | ₹10,000.00 |
| GST = 11,800 − 10,000 | ₹1,800.00 |
| CGST = SGST = 1,800 ÷ 2 | ₹900.00 each |
Example 3 — Add 5% GST to ₹50,000
| Step | Value |
|---|
| Net amount (exclusive) | ₹50,000.00 |
| Gross = 50,000 × 1.05 | ₹52,500.00 |
| GST = 52,500 − 50,000 | ₹2,500.00 |
| CGST = SGST = 2,500 ÷ 2 | ₹1,250.00 each |
Frequently asked questions
What are the current GST slabs in India?
The rationalized 2.0 structure currently in force has four slabs: 0%, 5%, 18% and 40%. The earlier 12% and 28% slabs were merged away in the post-September-2025 overhaul, so most goods and services now fall under 18%, essentials under 0% or 5%, and a 40% slab covers the highest-taxed category.
How do I remove GST from an MRP?
MRPs are usually inclusive of GST. Divide the MRP by (1 + rate/100) to get the base price; the difference is the embedded GST. Example: a ₹1,180 MRP at 18% → base = 1,180 ÷ 1.18 = ₹1,000, so ₹180 of the price is GST. This calculator's "Remove GST" mode does exactly this.
How is GST split between CGST and SGST?
For a sale within one state, the total GST is split equally: half goes to the Centre (CGST) and half to the state (SGST). So on ₹1,800 of GST, CGST and SGST are ₹900 each. For sales across state borders, the same total is collected as a single IGST instead.
What is the 40% GST slab for?
The 40% slab is the highest bracket in the rationalized structure, intended for goods the tax structure places in the top category — typically described as sin and luxury goods. Which specific goods fall here depends on official classification, so verify before quoting a rate to a customer.
What's the difference between CGST+SGST and IGST?
Same total tax, different collection: intra-state sales split it as CGST + SGST (half each), while inter-state sales collect it as one IGST. Use the transaction-type toggle above to see the exact breakup for either case.
What's the difference between inclusive and exclusive pricing?
An exclusive price is quoted before GST — the customer pays price + GST on top. An inclusive price already contains GST — the base price and the tax must be backed out of it. B2B quotes are usually exclusive; consumer MRPs are usually inclusive.
Is 12% GST still valid?
No. The 12% slab was retired in the September 2025 reform and merged into 5%, while 28% was absorbed into 18% or 40%. Any calculator, price list or invoice template still showing 12% or 28% is outdated. This calculator uses only the current slabs: 0%, 5%, 18% and 40%.
Is GST charged on exports?
No. Exports are zero-rated — the exporter charges 0% GST and can claim a refund of the input tax paid on purchases. This is different from exempt goods, where no refund is available. The 0% slab in the selector above is for exactly these cases.
What is the GST composition scheme?
Small businesses with turnover up to ₹1.5 crore can opt for the composition scheme: instead of regular GST, they pay a low flat rate — 1% for traders and manufacturers, 6% for services (turnover up to ₹50 lakh) — with much simpler quarterly returns. The trade-off: they can't claim input tax credit or issue tax invoices, so it's not for businesses selling to GST-registered buyers.
Is this calculator's result final?
It's an estimate for illustration, computed in your browser. The arithmetic is exact, but the correct slab for a specific product depends on its official HSN classification — verify with a tax professional before invoicing or filing.
Disclaimer: This is an estimate for illustration, computed in your browser — no data leaves your device. The math is exact, but product-to-slab classification must be verified with a tax professional before reliance. Consult a chartered accountant for invoicing and filing.