Free tools, no sign-up.
Fast, accurate calculators and references for Indian businesses, GST, income tax, HSN codes and statutory due dates. Pick a tool below; each opens on its own page.
Calculators & generators
6 toolsBuild a full invoice: many line items, inclusive or exclusive pricing, CGST/SGST or IGST, cess, reverse charge and TDS/TCS.
A Rule 46 tax invoice with your details, the right CGST/SGST or IGST split, HSN/SAC and amount in words, downloadable as a PDF.
Compare both regimes across every head of income, with capital gains, surcharge, marginal relief and your advance-tax dates.
Tax on shares, mutual funds and property sold in FY 2025-26 or 2026-27
Interest at 18% and the GSTR-3B or GSTR-1 late fee, with the 2026 cash ledger rule
Open full GST interest and late fee calculator →See which credit pays which GST and the cash left to pay, in the order the law sets
Open full GST set off calculator →Instalment, full amortisation schedule, what a part-payment saves, the real rate once fees are in, and home-loan tax relief.
References & Trackers
3 toolsSearch by product or service name, or by code, to find the HSN or SAC code.
Every recurring GST, income-tax and ROC deadline through the year, in one scannable calendar.
Open full Due-Date Calendar →How to track an ARN on the portal, what each of the nine statuses means, and your last date to answer a REG-03 query.
Rather have an Expert do it?
These tools give you the numbers. We give you the filings, GST, ITR and ROC, handled end to end by real Experts.