GST Calculator India – Add or Remove GST (CGST, SGST, IGST)
Add or remove GST in one step and see the CGST, SGST or IGST split for any slab.
How to use: Type the amount, choose the GST rate and whether the price already includes GST. Pick “Within state” for CGST + SGST or “Other state” for IGST.
How to use the GST Calculator (India)
Enter a price and choose the GST rate. Pick “Before GST” to add tax to a net price, or “Including GST” to find the taxable value hidden inside a final price, for example on a bill or MRP. For a sale within one state the tax is split equally into CGST and SGST (or UTGST); for a sale to another state it is charged as IGST.
Formulas: adding GST, tax = amount × rate ÷ 100. Removing GST, net value = amount ÷ (1 + rate ÷ 100) and tax = amount − net value.
Worked example: ₹10,000 at 18% within Maharashtra: GST ₹1,800 (CGST ₹900 + SGST ₹900), total ₹11,800. Working backwards, a bill of ₹11,800 including 18% GST has a taxable value of ₹10,000.
Since GST 2.0 took effect on 22 September 2025 the main slabs are 0%, 5%, 18% and a 40% rate for luxury and sin goods; the old 12% and 28% slabs were mostly removed, but you can still pick them for older invoices. Gold and jewellery stay at 3%.
This is an estimate, not tax advice. The correct rate depends on the item’s HSN or SAC code; check it on the CBIC GST rates page or ask your CA. Updated October 2026.
Frequently asked questions
What are the GST slabs in 2026?
Nil, 5%, 18% and 40%, plus special rates of 3% on gold, silver and jewellery and 0.25% on rough diamonds. The 12% and 28% slabs were largely removed on 22 September 2025.
How do I remove GST from a price?
Divide the price by 1 plus the rate. For 18%, divide by 1.18: ₹1,180 ÷ 1.18 = ₹1,000 net, so the GST is ₹180.
When is IGST charged instead of CGST and SGST?
IGST applies when the supplier and the place of supply are in different states, and on imports. Within one state, CGST and SGST are charged half each.
Is GST charged on petrol and diesel?
No. Petrol, diesel, natural gas, ATF and alcohol for drinking are outside GST and taxed by the states.