Salary & Tax · GST & Sales Tax

GST Calculator — Add or Remove GST

Add GST to a price, or work backwards from a GST-inclusive price to the base amount and tax. Pick the current GST rates (0, 5, 18 or 40 %, or 3 % for gold) or any rate, split it into CGST + SGST or IGST, and total a whole invoice of items at different rates.

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Quick start — try a typical case

Tax

Currency

Calculate For

The Amount

Amount

₹ 10 thousand

GST Rate

Since 22 Sep 2025: 5 % for most essentials, 18 % standard, 40 % for luxury and sin goods; 3 % on gold and silver.

Supply

Your result Live

Price Including GST

₹11,800

₹10,000 + ₹1,800 GST at 18%

GST Amount: ₹1,800
CGST: ₹900
SGST / UTGST: ₹900
Price Before GST: ₹10,000
Price Including GST: ₹11,800
CGST + SGST Rate: 9.00% + 9.00%

Before GST · 85%₹10,000
GST · 15%₹1,800

GST rate depends on the HSN/SAC code of the goods or service — check the CBIC rate schedule for your item.

How this is calculated

Add tax: Total = Price × (1 + r) · Remove tax: Price = Total ÷ (1 + r), Tax = Total − Price

r: Tax rate as a decimal (18 % → 0.18)
CGST / SGST: Within a state, GST is split equally between the Centre and the state; between states it's charged as IGST

When a price excludes tax, multiply by (1 + rate). When it already includes tax, divide by (1 + rate) to get the base — taking 18 % off the total would be wrong, because the tax was charged on the base, not the total. In India, GST within a state is split equally into CGST and SGST; on interstate sales the whole amount is IGST.

Assumptions & sources

Tax charged on the discounted value; no cess, reverse charge or composition scheme.
Rates as entered — the correct GST rate depends on the item's HSN/SAC classification.

1GST rate schedules for goods and services (notifications effective 22 September 2025) — Central Board of Indirect Taxes and Customs
2Goods and Services Tax — overview — GST Council

Calculator ID TAX-GST-001 · version 1.0.0

Common questions

How do I remove GST from a price?

Divide the GST-inclusive price by (1 + rate). For 18 %: ₹11,800 ÷ 1.18 = ₹10,000, so the GST is ₹1,800.

What are the GST rates now?

Since 22 September 2025 the main rates are 5 % (most essentials) and 18 % (standard), with 40 % on luxury and sin goods. Some items are exempt (0 %), gold and silver are 3 %, and rough diamonds 0.25 %.

When is it CGST + SGST and when IGST?

If the seller and the place of supply are in the same state, the tax is split equally into CGST and SGST (or UTGST). For supplies between states — and imports — it's IGST.