Skip to content
CalculatorDash
Menu

GST Calculator (India)

Updated · By the CalculatorDash editorial team · How we check our maths

Quick answer

To add GST, multiply the price by (1 + rate ÷ 100). To remove GST from an inclusive price, divide by (1 + rate ÷ 100). Since GST 2.0 took effect on 22 September 2025 the main slabs are 5%, 18% and 40%, with 0% for exempt items and 3% for gold and jewellery.

GST

₹

GST amount

₹1,800.00

Amount before GST
₹10,000.00
Amount including GST
₹11,800.00
CGST
₹900.00
SGST / UTGST
₹900.00
IGST
₹0.00

Check the CBIC rate schedule for the exact rate on a specific item or service.

How this calculator works

India's Goods and Services Tax is charged on most supplies of goods and services. For a sale within one state, the tax is split equally between central GST (CGST) and state GST (SGST, or UTGST in union territories). For a sale between states, the whole amount is integrated GST (IGST).

The GST 2.0 reform, effective 22 September 2025, merged the old 12% and 28% slabs into a simpler structure: 5% for essentials and many mass-use goods, 18% as the standard rate for most goods and services (including IT and SaaS), and 40% for luxury and sin goods. Special rates of 3% (gold, silver, jewellery) and 0.25% (rough diamonds) continue.

The formula

Add GST
GST = amount × rate ÷ 100; total = amount + GST
Remove GST
net = inclusive amount ÷ (1 + rate ÷ 100); GST = inclusive amount − net
Split
CGST = SGST = GST ÷ 2 within a state; IGST = GST between states

Worked example

A design agency invoices ₹50,000 for services at 18% to a client in the same state. GST is ₹9,000, split into ₹4,500 CGST and ₹4,500 SGST, and the invoice total is ₹59,000. If the client is in another state, the ₹9,000 is charged as IGST.

Tips

  1. 01Printed MRPs in India include GST; use 'remove GST' to find the taxable value.
  2. 02Keep a copy of every purchase invoice to claim input tax credit.
  3. 03Rates depend on the exact HSN or SAC code; confirm before invoicing a new item.

Frequently asked questions

How do I calculate GST from a total amount?

Divide the GST-inclusive amount by (1 + rate ÷ 100) to get the taxable value, then subtract it from the total. For ₹1,180 at 18%, the taxable value is ₹1,000 and GST is ₹180.

What are the current GST slabs?

Following GST 2.0 (effective 22 September 2025), the main slabs are 0%, 5%, 18% and 40%, with special rates of 3% on gold, silver and jewellery and 0.25% on rough diamonds.

What is the GST rate on software and SaaS?

Software, IT and online information services are generally taxed at 18%.

When is IGST charged instead of CGST and SGST?

IGST applies to inter-state supplies and imports. CGST and SGST apply when the supplier and the place of supply are in the same state.

Sources for the default values

Defaults are typical figures from these sources; change any value to match your situation.