Four calculators, one table of statutory periods.
Consulting websites usually publish brochures. These are the things a consultant would otherwise work out for you on a call: the date, the money, the calendar, and what to do first. They run in your browser, they send nothing anywhere, and every answer prints the provision it came from.
Limitation calculator
Enter one date and get every period that runs from it, each line carrying the provision it came from.
- Thirty events across the Customs Act, the CGST Act, the Foreign Trade Act and the SEZ Rules.
Appeal and pre-deposit planner
The forum, the last date, and the money you actually have to put down before the appeal is admitted.
- Statutory percentage, ceiling and arithmetic, all shown.
Compliance calendar
What falls due in the next ninety days across GST, Customs, foreign trade and SEZ.
- Filter by regime. Ordinary dates, stated as ordinary dates.
Matter triage
Something arrived. This tells you where it sits, what the clock is, and what the first week looks like.
- Eight starting points, from an informal call to a bank attachment.
How they are built
One version stamped table holds every period. All four tools read from it, so an answer here and an answer there cannot disagree.
Every line carries its provision
A date without a section reference is a guess with a calendar behind it. Each result names the Act, the Rule or the Handbook paragraph it was derived from, so you can go and read it.
Periods are computed the way they are written
Days stay days and months stay calendar months, clamped to the end of a short month. A period of three months from 31 May ends on 31 August, and from 30 November it ends on 28 or 29 February.
Recent amendments are flagged, not smoothed over
Where a period changed in the last two budget cycles, the result carries a marker asking you to confirm it. That is more useful than quiet confidence.
Nothing is transmitted
No date, figure or selection you enter leaves your device. There is no analytics on this site and no server behind these pages.
The limits of a calculator
These tools compute a period from a date. They do not know what the relevant date is in your matter, whether an extension was notified, whether a provision was substituted for the year in question, or whether the department has computed it differently. Those are the questions that decide matters, and they need the papers.
Holidays
Where a last day falls on a holiday, Section 10 of the General Clauses Act 1897 generally allows the act to be done on the next working day. The tools do not apply that automatically, because the working day calendar differs by forum.
Extensions
Filing dates in this field are extended by notification more often than in any other. The compliance calendar states the ordinary date, and says that it is the ordinary date.
A date is a fact. What to do about it usually is not.
If the tool has told you something you did not expect, that is a good reason for a short conversation before the date passes.