Free tax & finance tools
HSN/SAC finder, GSTIN validator, GST, late-fee, e-way bill and finance calculators for Indian businesses — no sign-up needed.
HSN / SAC Code Finder
Search by product, service or code — with the usual GST rate.
4-digit codes are goods (HSN); 6-digit codes starting with 99 are services (SAC). Rates are indicative — verify notifications for exemptions.
GSTIN Validator & State Finder
Check format and checksum; find the state and PAN details behind a GSTIN.
Reverse GST Calculator
Get base value from a GST-inclusive price.
GST Calculator
Add GST to a base amount.
GST Late Fee & Interest
What a late GSTR-3B / GSTR-1 costs you (late fee + 18% interest).
E-Way Bill Requirement Checker
Do you need an e-way bill for this consignment, and how long is it valid?
Composition vs Regular Scheme
Compare annual GST outgo under both schemes for your numbers.
Composition dealers cannot collect GST from customers or pass ITC to B2B buyers.
Invoice Due Date & MSME Interest
MSMED Act: payment within 45 days max; late payers owe 3× RBI bank rate, compounded monthly.
Profit Margin Calculator
Work out margin and markup.
Loan EMI Calculator
Estimate monthly instalments.