Free GST tools for Indian businesses
Calculate GST, find HSN rates, validate GSTINs, estimate late fees and generate invoices — no sign-up, no payment.
- GST Calculator — Add or remove GST in one tap. Correct CGST + SGST or IGST split for every slab.
- HSN / SAC Rate Finder — Type a product HSN or service SAC code and get the current GST 2.0 rate instantly.
- GST Invoice Generator — Make a clean, GST-compliant tax invoice PDF. 3 free invoices a day, no sign-up.
- GSTIN Validator — Check a GSTIN format, state code and check digit, and see what each part means.
- GSTR-3B Late Fee Calculator — Estimate the late fee and 18% interest for a delayed GSTR-3B.
- Reverse GST Calculator — Remove GST from a GST-inclusive price and see the CGST, SGST or IGST split.
- TDS Calculator — Find the section, rate and TDS to deduct on a contractor, rent or fee payment.
- GST State Code List — Look up the 2-digit GST state code for any state or union territory.
Frequently asked questions
- Are these tools really free?
- Yes. The GST calculator and HSN rate finder are unlimited and need no account. The invoice generator is free for 3 invoices a day per device.
- Do I need to sign up?
- No. Open any tool and use it right away. You only make an account if you want the full ARTHACE suite (saved data, e-invoicing, GST filing).
- Is the GST rate accurate?
- Rates reflect GST 2.0 (effective 22-Sep-2025) as commonly applied. They are editable defaults, not tax advice — verify value-slab items and the live CBIC schedule before filing.
- Is there a free plan for the full ARTHACE accounting software?
- Yes. You can start on the free plan directly, for one user and up to 40 vouchers a month, with no credit card. Paid plans add more capacity and features.
- Can I make a real e-invoice (IRN) here?
- The free generator produces a professional GST-invoice PDF. A government-registered e-invoice (IRN) needs GSTIN authentication — that is part of the full ARTHACE app.