GST Calculator for Online Sellers: Add or Remove GST at the Current 5%, 18% and 40% Rates

Since 22 September 2025, most goods in India are taxed at 5% or 18% GST, with 40% for a short list of sin and luxury goods; the older 12% and 28% slabs were removed. To take GST out of a price that already includes it, divide by 1 plus the rate: ₹1,180 at 18% is ₹1,000 plus ₹180 GST. To add GST, multiply by 1 plus the rate. Use the calculator below for either direction, and for the CGST/SGST or IGST split.

What rates does the calculator start with?

The default is 18%, because that is the standard slab. The rate box is editable, so type 5, 40, 0 or any other rate your HSN code carries. The three slab rates come from the Ministry of Finance note on the 56th GST Council meeting: two slabs of 5% and 18%, and 40% for items such as pan masala, tobacco, aerated drinks, high-end cars, yachts and private aircraft. The revised rates apply from 22 September 2025.

Some goods are exempt (NIL). The same note lists UHT milk, pre-packaged and labelled paneer and Indian breads at NIL. Use 0 for those.

GST calculator

How is the GST worked out?

Let the rate be r (18% is 0.18).

1. Price including GST to taxable value: taxable value = price ÷ (1 + r).
2. GST = taxable value × r.
3. Price excluding GST to total: total = price × (1 + r).

For example, a pair of headphones listed at ₹2,360 including 18% GST has a taxable value of ₹2,360 ÷ 1.18 = ₹2,000 and GST of ₹360. A bar of soap at ₹100 excluding GST at 5% carries ₹5 GST and sells at ₹105. The calculator splits the GST equally between CGST and SGST for a sale inside one state, and shows it as IGST for a sale between states. It is a calculator, so the split is shown for convenience; your invoice must follow the place-of-supply rules.

Do not take GST off the wrong number. Marketplace fees such as referral and closing fees are separate; see Amazon seller fees in India and Flipkart seller fees, and the glossary entry on GST on marketplace fees.

Which rate applies to my product?

The rate depends on the HSN classification, not the product name. Some examples from the September 2025 rate changes:

For a longer list by category, see the GST rate finder for marketplace categories. If your price sits close to ₹2,500, take advice before listing: the table speaks of "sale value", and we have not confirmed from the notification text how it treats discounts or multi-piece sets. Ask your accountant.

What changes when the GST rate changes?

If a rate falls, the tax-inclusive price you show on the marketplace should fall too, or your margin quietly absorbs the difference. For example, a shampoo with a taxable value of ₹200 sold at 18% GST costs ₹236. At 5% GST the same taxable value is ₹210. Whether you keep the old price and take a higher margin, or pass the cut on, is your commercial decision; the legal question of anti-profiteering is outside this page and is one for your adviser. Update the tax code (HSN-linked tax category) on each listing as well; see GST 2.0 rate cuts: how sellers should update prices.

Who pays the GST on a marketplace sale?

You do. The buyer pays the tax-inclusive price, and you owe the GST on the taxable value to the government. Every person who supplies goods through an e-commerce operator must register for GST, irrespective of turnover, and the usual ₹20 lakh threshold does not apply to them. The marketplace also collects tax at source from your payout on the net value of your sales; our GST TCS calculator shows that deduction.

FAQ

How do I remove GST from a price including GST? Divide the price by 1 plus the GST rate. At 18%, divide by 1.18; at 5%, divide by 1.05. For ₹1,180 at 18%, the taxable value is ₹1,000 and the GST is ₹180. The calculator does this when you choose "Price including GST".

How do I add 18% GST to a price? Multiply the price by 1.18. A ₹1,000 product becomes ₹1,180, of which ₹180 is GST. The same method works at any rate: multiply by 1 plus the rate. Choose "Price excluding GST" in the calculator.

What are the current GST slabs in India? The main slabs are 5% and 18%, with 40% for sin and luxury goods, from 22 September 2025. Some goods are NIL-rated and some special items keep their own rates. Check your HSN code.

Do I charge CGST and SGST or IGST? Within one state, the GST is split into CGST and SGST (or UTGST). Between states it is charged as IGST. The total GST is the same; the head differs. The calculator shows both views.

Is this calculator tax advice? No. It is general information, not tax or legal advice. Rates depend on your HSN code and conditions, and rules change. Confirm with a chartered accountant or GST practitioner before you file or reprice.

Does GST apply on the marketplace commission? Marketplace fees carry their own GST, which is charged by the marketplace on its services. See the glossary entry on GST on marketplace fees for how it shows in your settlement.

Next step

If you manage a large catalogue, a rate change means repricing and re-coding many listings at once. Blooprint's Amazon account management team handles that clean-up for sellers on Amazon, Flipkart and other marketplaces.