GST Calculator
Work out the tax on any amount in seconds. Enter a figure, pick a slab, and see the base price, CGST, SGST and total split out — whether your number already includes GST or not.
- Inclusive & exclusive
- All five slabs
- No sign-up
How does NextBill help you to file GST?
You can use GST calculator from NextBill website in simple steps: You have to simply
- Auto-fetches data from your invoices
- Prepares GSTR-1, GSTR-3B & NIL returns
- Match sales & purchase entries
- One-click GST filing from dashboard
- No manual work, no errors
- 100% GSTN-compliant process
- File monthly or quarterly with ease
What is GST and how is it calculated?
The Goods and Services Tax (GST) is a comprehensive, destination-based tax system applied to the supply of goods and services in India. Introduced to streamline the taxation process, GST replaces a multitude of indirect taxes, such as VAT, service tax, and excise duty, creating a unified taxation system. Its primary goal is to simplify tax compliance for businesses and ensure transparency in tax administration.
GST is applicable to most goods and services, ensuring uniformity in taxation across the country. Businesses benefit from fewer tax filings, seamless input tax credits, and reduced tax burdens due to the elimination of cascading taxes.
GST inclusive and GST exclusive amounts
- GST Inclusive Amount
- The total price that already includes the GST within the amount. If a product is priced at ₹118 and the GST rate is 18%, the base price is ₹100 and ₹18 is the GST. Base Price = GST Inclusive Amount ÷ (1 + GST Rate / 100).
- GST Exclusive Amount
- The price that does not include GST and reflects only the base price of the product or service. GST is added separately. A base price of ₹100 at 18% becomes ₹118. Total Amount = Base Price × (1 + GST Rate / 100).
- CGST and SGST
- On an intra-state sale the total GST is split evenly between the central and state governments, which is why the calculator shows each at half the total.
- IGST
- On an inter-state sale the whole amount is collected by the central government as a single IGST line rather than a CGST and SGST pair.
Other tools you can use right now
HSN/SAC Code Finder
Search the full HSN and SAC list by code or product name, with live GST rates.
Open toolGSTIN Finder
Verify any GST number and pull the registered business name, status and address.
Open toolInvoice Generator
Build a GST-ready invoice with automatic tax maths and download it as a PDF.
Open toolEstimate Generator
Send a priced, professional estimate before the work starts.
Open toolPayroll Generator
Work out salary, deductions and net pay, then generate a payslip.
Open toolFrequently asked questions
GSTIN stands for Goods and Services Tax Identification Number. It is a unique 15-digit alphanumeric code assigned to every business or individual registered under the GST framework in India.
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