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GST Calculator India — CGST, SGST & IGST Split at Any Rate

Add or remove GST from any amount. Pick the rate, choose inclusive or exclusive, and get the CGST/SGST split for intra-state or IGST for inter-state instantly. Download Excel.

Amount & Direction

Amount

₹

Calculation Direction

GST Rate

Custom Rate overrides selection above

Transaction Type

Supply Type

Common GST Slabs (HSN Reference)

0%: Fresh produce, milk, books
5%: Packaged food, footwear <₹1000
12%: Processed food, business class air
18%: Most goods & services, electronics, IT services
28%: Luxury goods, automobiles, tobacco

GST Breakdown

₹0

total amount including GST

₹0

Base Amount

₹0

Total GST

₹0

CGST

₹0

SGST

18%

Effective Rate

Slab Comparison at This Amount

Rate	GST Amount	Total (incl. GST)	CGST	SGST

How GST Gets Calculated

GST (Goods and Services Tax) applies as a percentage of the base price, replacing India's earlier patchwork of VAT, service tax, and excise duty with one unified tax. The two calculation directions matter: exclusive GST adds the tax on top of a given base price (Total = Base × (1 + Rate)), while inclusive GST extracts the tax already baked into a given total price (Base = Total ÷ (1 + Rate)).

For intra-state transactions, GST splits evenly between CGST (Central GST) and SGST (State GST) — each gets exactly half the total GST rate. An 18% intra-state sale breaks into 9% CGST plus 9% SGST, both going to different government accounts despite combining to the same total burden on the buyer. For inter-state transactions, the full rate gets collected as IGST (Integrated GST) instead, which the central government later apportions to the destination state.

Rate selection depends on the HSN (Harmonized System of Nomenclature) or SAC (Services Accounting Code) classification of the specific goods or service — not a single nationwide rate. Most goods and services fall under 18%, but essentials like fresh food sit at 0%, processed food and footwear often at 5% or 12%, and luxury or sin goods like tobacco and automobiles at 28%, frequently with an additional compensation cess on top.

What's the difference between GST inclusive and exclusive?

Exclusive means the quoted price doesn't yet include GST — you add tax on top to reach the final amount the buyer pays. Inclusive means the quoted price already has GST baked in — you need to extract it to find the original base price and the tax component separately. Invoices and price tags should always state which one applies, since the same number means a different final cost depending on direction.

When does CGST+SGST apply versus IGST?

CGST+SGST applies when the supplier and the place of supply sit in the same state — an intra-state transaction. IGST applies when they sit in different states — an inter-state transaction, including most e-commerce and export-adjacent sales. The combined rate stays identical either way (e.g. 18% total), only the split and the destination ledger differ.

How do I find the correct GST rate for my product?

Look up the HSN code (for goods) or SAC code (for services) on the CBIC GST rate finder, since rates attach to classification codes, not product names. Most B2B invoices already carry the HSN/SAC code from the supplier — matching that code against the official rate schedule gives the authoritative rate, since informal "common knowledge" rates sometimes lag rate-revision notifications.

Does this calculator handle GST compensation cess?

No — this calculator covers standard CGST/SGST/IGST slabs only (0%, 0.25%, 3%, 5%, 12%, 18%, 28%, or any custom rate). Compensation cess applies on top of the base rate for specific items like tobacco, aerated drinks, and certain automobiles, and varies by item rather than following a fixed slab — check the item-specific cess notification separately if it applies to your transaction.

GST Calculator India — CGST, SGST & IGST Split at Any Rate

How GST Gets Calculated

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