GST Calculator
Calculate GST both ways with PayClever — add GST to a base price, or extract it from a GST-inclusive price, with the CGST/SGST or IGST split.
Amount is exclusive of GST — GST added on top
Same state — splits into CGST + SGST
GST amount
₹180
- Base amount
- ₹1,000
- Total amount (incl. GST)
- ₹1,180
- CGST
- ₹90
- SGST
- ₹90
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GST amount
₹180
Base: ₹1,000 · Total: ₹1,180 (18%)
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GST at common rates (on ₹1,000)
Illustrative category examples — always check the current GST Council rate schedule for your specific good or service, since classification affects which slab actually applies.
| Rate | Typical category | GST on ₹1,000 | Total |
|---|---|---|---|
| 5% | Essential goods, packaged food | ₹50 | ₹1,050 |
| 12% | Processed food, business-class air travel | ₹120 | ₹1,120 |
| 18% | Most goods and services (standard rate) | ₹180 | ₹1,180 |
| 28% | Luxury and sin goods | ₹280 | ₹1,280 |
Adding GST vs. removing GST
These are two different calculations, and mixing them up is one of the most common GST mistakes. Adding GST starts from a base price and multiplies it by the rate to find the tax — base × rate ÷ 100 — then adds that on top. Removing GST works backward from a price that already includes tax: you can't just multiply the inclusive price by the rate, because that would tax the tax itself. Instead, you divide the inclusive price by (1 + rate ÷ 100) to recover the original base, and the difference between the two is your GST amount.
The CGST/SGST versus IGST split is a separate question from the rate itself, and depends entirely on where the buyer and seller are registered — not on where the goods are delivered or where the transaction takes place. A sale between two businesses registered in the same state splits the tax evenly between the central and state governments as CGST and SGST. The moment either party is registered in a different state, the entire tax amount instead goes through as IGST, which is later apportioned between the central government and the destination state. The combined rate paid by the buyer is exactly the same either way — only the internal accounting differs.
Frequently asked questions
What's the difference between CGST, SGST, and IGST?
For a sale within the same state, GST splits evenly into CGST (Central GST) and SGST (State GST) — each is exactly half your total GST amount, going to the central and state governments respectively. For a sale between two different states, the full GST amount is instead charged as a single IGST (Integrated GST), which the central government later settles with the destination state.
How do I calculate GST from a GST-inclusive price?
Divide the inclusive price by (1 + GST rate ÷ 100) to get the base price, then subtract that from the inclusive price to get the GST amount. For example, a ₹1,180 inclusive price at 18% GST has a base price of ₹1,180 ÷ 1.18 = ₹1,000, and ₹180 of that is GST — this is exactly what this calculator's "Remove GST" mode does for you.
What are the current GST rate slabs in India?
The standard slabs are 5%, 12%, 18%, and 28%, with a small number of essential items at 0% (exempt) and a few luxury/sin goods carrying an additional cess on top of 28%. Which rate applies depends on the specific good or service's HSN/SAC classification — check the current GST Council rate schedule for your specific item rather than assuming based on a similar product.
Should I use CGST+SGST or IGST for my transaction?
It depends on where the buyer and seller are located, not where the goods physically move. If both parties are registered in the same state, charge CGST+SGST; if they're in different states (or one is an export), charge IGST instead. Getting this wrong is a common compliance mistake, since the total tax rate is identical either way — only the split and the government it's remitted to differs.
Is GST charged on the discounted price or the original MRP?
GST is charged on the actual transaction value — the price after any discount actually given at the time of sale — not the original MRP. If a ₹1,000 item is sold at a 10% discount for ₹900, GST applies to that ₹900, not the original ₹1,000, provided the discount is shown on the invoice and wasn't a post-sale adjustment.
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FY 2026-27 · Last updated September 2026
PayClever gives you an informational estimate, not tax, legal, or financial advice — check with a professional before acting on it.