GST Calculator

Add GST to a price or remove it from a GST-inclusive price, at 0%, 3%, 5%, 18% or 40%, with the CGST/SGST split.

₹1,000
GST rate
Amount is

Price with GST

₹1,180.00

GST amount

₹180.00

CGST / SGST each

₹90.00

Your result

Adding 18% GST to ₹1,000.00 gives ₹1,180.00: ₹180.00 GST (₹90.00 CGST + ₹90.00 SGST within a state).

About the GST Calculator

A GST calculator adds Goods and Services Tax to a price or takes it out of an inclusive price. Since 22 September 2025 the main GST slabs are 5% and 18%, with 40% for luxury and sin goods. 18% GST on ₹1,000 is ₹180, so the price becomes ₹1,180.

How it is calculated

GST = price × rate ÷ 100; price before GST = inclusive price ÷ (1 + rate ÷ 100)

  • Adding GST: total = price + price × rate.
  • Removing GST from an inclusive price: base = total ÷ (1 + rate), GST = total − base.
  • Within a state, GST is split equally into CGST and SGST. Between states, it is charged as IGST.

Worked example

Inputs: ₹1,000 before GST at 18%.

Result: GST ₹180 (₹90 CGST + ₹90 SGST), total ₹1,180.

Open this example in the calculator

Rules and assumptions

  • GST slabs since 22 September 2025: 0% (nil-rated), 5%, 18%, and 40% for luxury and sin goods. Gold and jewellery are taxed at 3%.
  • The rate depends on the HSN or SAC code of the item. Check the CBIC rate schedule for a specific product.

Frequently asked questions

What are the GST slabs now?

Since 22 September 2025: 0%, 5%, 18% and 40%, plus special rates such as 3% for gold. The old 12% and 28% slabs were folded into these.

How do I remove GST from a price?

Divide the inclusive price by (1 + rate). For 18%, ₹1,180 ÷ 1.18 = ₹1,000, so GST is ₹180.

What is CGST and SGST?

For sales within a state, GST is split equally between the central (CGST) and state (SGST) governments. Inter-state sales carry IGST instead.