GST ₹180 · CGST ₹90 · SGST/UTGST ₹90 · Total ₹1,180
Business
GST India Calculator & HSN/SAC Lookup
Calculate inclusive or exclusive GST and research HSN/SAC classifications locally.
Free to use No account required Browser calculation
GST knowledge layer
Search HSN or SAC before choosing a rate.
Search a bundled local HSN/SAC reference subset seeded from GSTN classification material by code or description. Where our researched notification layer can resolve a rate safely, the result will show it separately.
Research current through 2026-09-09Runtime stays local. No AI or external API is required.
Main goods schedules
5%18%40%
Special goods schedules
3%0.25%1.5%
12% can still arise under specific notifications. The former general 28% Schedule VII was omitted from 1 February 2026; historical/specific treatment still needs verification.
Reference subset loads only when you search, keeping the calculator page fast.
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Input
ReadyEnter your values
Enter the values for this calculator. We’ll show the answer, the method and the formula together.
Calculation method
Formula & methodology
The result above is backed by the calculator-specific formulas and assumptions shown here.
GST-exclusive total
Amount + (Amount × GST rate ÷ 100)GST from inclusive price
Inclusive amount − [Inclusive amount ÷ (1 + GST rate ÷ 100)]Intra-state illustration
CGST = total GST ÷ 2; SGST / UTGST = total GST ÷ 2Inter-state illustration
IGST = total GSTMethod & assumptions
The exclusive mode adds the selected percentage to the entered taxable base. The inclusive mode reverses tax by dividing by (1 + rate), which is mathematically different from simply subtracting the percentage from the inclusive total.
For the researched current goods structure, Notification 9/2025 established 5%, 18%, 40%, 3%, 0.25% and 1.5% schedules. The former general 28% Schedule VII was omitted from 1 February 2026 after tobacco/pan-masala treatment moved into the 18% and 40% schedules.
A 12% total GST rate can still arise under specific notifications even though 12% is not one of the current main general goods schedules. The selector therefore keeps it as a clearly labelled specific-notification arithmetic option.
The intra-state illustration splits total GST equally into CGST and SGST/UTGST. The inter-state illustration shows the full amount as IGST. Actual place-of-supply and transaction rules must still be checked.
The HSN/SAC search layer currently uses a bundled local reference subset seeded from GSTN classification material, not a complete official directory. GSTN states that its Search HSN tool is facilitative and not legally binding, so classification matches and rate references are deliberately shown as separate pieces of information.
Compensation cess, special valuation methods, reverse charge, exemptions with conditions, composition tax and transaction-specific adjustments are not inferred automatically by this arithmetic calculator.
Important assumption
A GST rate is not determined by a product name alone. Classification, description, conditions, exemptions, date, place of supply and current notifications can all matter. Use the HSN/SAC search as a research aid and confirm legally significant treatment from current CBIC/GST Council material or a qualified tax professional.
Official referencesCBIC — Notification No. 9/2025 Integrated Tax (Rate)Primary 2025 goods-rate schedule, effective 22 September 2025.CBIC — Tax Information PortalCurrent GST notifications and amendments, including the 2026 tariff-alignment update.GST Portal — Search HSN/SACOfficial GSTN classification-search tool and downloadable HSN/SAC directory.GSTN — Search HSN advisoryExplains the search dataset and GSTN’s facilitative/non-binding limitation.
Examples
Worked examples
Examples use this calculator’s own inputs and outputs, not generic page filler.
Base ₹1,000 · GST ₹180
IGST ₹500 · Total ₹10,500
GST ₹0 · Total ₹2,000
GST ₹1,500 · CGST ₹750 · SGST/UTGST ₹750 · verify legal rate applicability separately
Help & assumptions
Frequently asked questions
Important assumptions and practical details for this calculator.
Why can’t I remove GST by subtracting 18% from an 18%-inclusive price?+
Because 18% is calculated on the pre-tax base, not on the final inclusive amount. The correct reverse calculation divides the inclusive amount by 1.18, then finds the difference.
What are the current main GST goods rates shown here?+
For the current researched general goods structure, the main schedules are 5%, 18% and 40%, with special 3%, 0.25% and 1.5% schedules. Specific notifications can prescribe other rates such as 12%.
What happened to the general 28% slab?+
The 28% Schedule VII created in September 2025 was omitted from 1 February 2026. Tobacco and pan-masala entries were moved into current 18%/40% treatment. A 28% option is retained only for historical or separately verified arithmetic, not presented as a current general schedule.
Does the HSN/SAC search automatically tell me the legally correct GST rate?+
No. It searches a bundled local HSN/SAC reference subset seeded from GSTN classification material, while rate references come from a separate researched notification layer. Only conservative code matches can be auto-applied. Conditional or unresolved cases are explicitly marked for verification.
When should I use CGST/SGST instead of IGST?+
The calculator can illustrate intra-state tax as CGST plus SGST/UTGST and inter-state tax as IGST. The legal place-of-supply rules determine which treatment actually applies to a transaction.
Why does the site say the GSTN HSN search is not legally binding?+
Because GSTN’s own advisory describes the revamped Search HSN tool as a facilitative search based on prevailing usage, not a legally binding classification determination. The calculator preserves that limitation instead of overstating certainty.
What happens if I choose a 0% GST rate?+
The arithmetic returns zero GST, so the amount before and after GST stays the same. A 0% selection does not by itself establish that a real supply is legally nil-rated or exempt.
Can the calculator handle decimal GST rates such as 0.25% or 1.5%?+
Yes. The arithmetic supports the decimal rate options shown in the selector. Their legal applicability depends on the correct classification, description, conditions and current notification, so the rate must still be verified.
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