Free GST & Business Tools for Indian Businesses
Add or remove GST, work out the fee on a UPI payment at your bank's MDR rate, calculate MSME late-payment interest under Section 16 of the MSMED Act, compute contractor TDS, look up HSN codes and check a GSTIN's format.
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Frequently Asked Questions: GST Tax & Calculations
Short answers on GST, the MSMED Act and UPI charges. Rules change: check the official source or your CA.
GST rates from 22 September 2025
Since 22 September 2025 (GST 2.0) most goods and services fall in four slabs: 0%, 5%, 18% and 40%. A few items have special rates, such as 3% and 0.25%. The GST calculator has the four slabs and takes any other rate you type, and the HSN code finder lists common items with their current rate. Rates were checked on 4 October 2026; some items depend on price, packing or other conditions, so confirm the rate for your exact item in the CBIC rate notification or with your CA.
Explore All BillBabu App Business Tools
- Online bill maker Make one GST bill in your browser with HSN codes and the CGST + SGST or IGST split, then print it or save it as a PDF.
- Quotation maker Make a quotation with items, GST, a valid-until date and your terms, then print it or save it as a PDF.
- GST calculator Add GST to an amount or take it out of a price that includes GST, at the current rates, with the CGST + SGST or IGST split.
- HSN code finder Look up the HSN or SAC code and current GST rate of common shop items and services.
- GST bill format Every field a GST bill must show, a filled example, and blank Excel, Word and PDF formats to download.
- GSTIN format check Check that a GSTIN has the right state code, PAN pattern and check digit before you put it on a bill.
Take Your Billing & Tax Compliance Beyond Free Calculators
Save your items and customers once, make GST bills and quotations on your phone, put a due date on each bill, share PDFs on WhatsApp, and see sales and GST reports.
From a calculator to a full bill
The calculator gives you the tax for one amount. A bill needs your items, HSN codes and business details too: see the GST bill format and the quotation format, or make one now with the free GST invoice generator. Billing every day? See the GST billing software, the quotation and estimate maker or pricing.