Free tools
Two calculators, no sign-up. Each one shows its formula in words next to the arithmetic — because a penalty you can compute is a penalty you can prioritise.
The late fee (₹50 per day, capped at ₹10,000) and the interest (18% per year on the tax paid late) are two different charges. Enter the due date, the filing date and the net tax due, and see both, side by side.
AOC-4 is due 30 days after the AGM, MGT-7 and MGT-7A 60 days after — and lateness costs ₹100 per day per form, with no cap. Enter the AGM date and see the due date and the running fee.
Want the reasoning behind the numbers? The blog works through both, with examples.
Metiq