A calculator is only worth the data behind it. Here is exactly what we use, how sure we are, and what you should still check yourself.
Certification status is the part we stand behind. Whether a product needs BIS CRS registration or WPC-ETA approval comes from the published Compulsory Registration Scheme product list and the WPC scheme. These lists change by notification, not by interpretation, so a product is either on them or it isn't.
Duty rates are indicative and we say so on every row. Rates move at every Budget, and classification is ultimately the assessing officer's call, not ours. Each product carries a confidence grade:
Every rate field on the calculator is editable, and every product links to the official ICEGATE duty calculator. If your CHA gives you a different number, use theirs.
That last line is the one most people get wrong. A GST-registered shop's true cost is the total minus the IGST, and that is the number the calculator leads with.
Nothing here is auto-published. A change is scraped, diffed and then signed off by a person before it reaches this site, because a wrong number that someone orders against is worse than no number at all.
This is not customs advice, tax advice or legal advice, and it is not a substitute for a licensed customs broker. It is a way to find out early whether an idea is worth pursuing — and, more often than you'd expect, whether a product can be imported at all before anyone spends money on it.
Found a wrong number? Tell us and we'll fix it and credit you. Corrections are the most useful thing anyone can send.