GST calculator (India)
Add or remove GST at 5, 12, 18 or 28 percent, with the CGST and SGST split.
FreeRuns in your browserNo signupUpdated 2026-10-29
Rates last checked October 2026. Intra-state means the supplier and the place of supply are in the same state.
Taxable value
₹10,000
GST @ 18%
₹1,800
Invoice total
₹11,800
Tax split
| Component | Amount |
|---|---|
| Taxable value | ₹10,000 |
| CGST @ 9% | ₹900 |
| SGST @ 9% | ₹900 |
| Total | ₹11,800 |
Summary
Taxable value: ₹10,000 GST rate: 18% (intra-state, CGST + SGST) Taxable value: ₹10,000 CGST @ 9%: ₹900 SGST @ 9%: ₹900 Total GST: ₹1,800 Invoice total: ₹11,800
About this tool
How it works and how to read the result.
Need this done for you?
E-commerce development
Online stores on Shopify, WooCommerce or a custom stack.
See the serviceWhat it does
A GST calculator adds tax to a price or strips it out of an inclusive amount, using the Indian slabs of 0, 5, 12, 18 and 28 percent. Choose intra-state supply and it splits the tax into CGST and SGST. Choose inter-state and it shows a single IGST line. The breakdown is laid out the way it appears on a tax invoice, so you can copy the lines straight across. Everything runs in your browser and nothing is sent anywhere.
How to use it
- Pick "Add GST" if you have the taxable value, or "Remove GST" if you have the amount including tax.
- Enter the amount in rupees.
- Choose the GST rate for the goods or service.
- Pick intra-state or inter-state, depending on where the supplier and the place of supply are.
- Read the split on the right and copy the summary into your invoice or accounts.
How to read the result
A web design invoice for a taxable value of 10,000 rupees at 18% GST comes to 11,800. For a client in the same state, the tax line is split into CGST at 9%, which is 900, and SGST at 9%, which is another 900. For a client in a different state, the same 1,800 appears as a single IGST line at 18%.
Running it the other way, a supplier quotes 11,800 "inclusive of GST". Switch to "Remove GST" and enter 11,800 at 18%: the taxable value is 10,000 and the GST is 1,800. That is the amount you can claim as input tax credit if you are registered.
The 5% and 12% slabs split the same way, into 2.5% and 2.5%, or 6% and 6%. At 0% the tax lines show zero, which is what an exempt or zero-rated invoice looks like.
If you are setting up a store or a billing system that needs to apply the correct split automatically based on the customer's state, our ecommerce development service handles tax logic as part of the checkout. For the gateway fee that comes off a card payment, see the Razorpay fee calculator.
Questions
Frequently asked.
What is the difference between CGST, SGST and IGST?
CGST and SGST are charged together on a supply inside one state, each at half the GST rate. IGST is charged instead when the supplier and the place of supply are in different states, at the full rate. The total tax is the same either way; only who collects it changes.
How do I remove GST from an inclusive price?
Divide the inclusive amount by one plus the rate. For 11,800 at 18%, divide by 1.18 to get 10,000 as the taxable value, and 1,800 as the GST. Do not multiply the inclusive price by 18%, which gives 2,124 and overstates the tax.
Which GST rate applies to websites and software services?
Website design, development, hosting and most IT services fall under 18% GST in India. Exports of services to clients outside India are zero-rated when the conditions are met, so no GST is charged on the invoice. Confirm with your accountant for your specific case.
Does the GST rate change?
Yes. The GST Council revises slabs and item classifications from time to time. The rates here were last checked in October 2026. Check the latest notification or ask your accountant before you issue an invoice if an item has recently moved between slabs.
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