The TDR deadline

Within 30 calendar days after the last calendar day of the reporting month. Calendar days, not business days. Twelve times a year, including the months you sold nothing.

Every due date

30 days after month end lands on a different day of the month each time — which is exactly why it is easy to miss. It is never simply "the 30th".

January is the one that breaks the habit

Every other month, "30 days after month end" lands on the 30th of the following month, and people learn that as the rule. January does not. 31 January plus 30 days is 2 March — the due date jumps a whole month name, and in a leap year it is 1 March. If you have set a recurring reminder for the 30th, that is the month it is wrong.

When the due date falls on a weekend

The clause says 30 calendar days. Calendar days, not business days. Neither the clause nor the portal's own published FAQ names an exception for a due date that lands on a Saturday, Sunday or federal holiday.

Through 2027 that happens 5 times:

• July 2026 data, due 30 Aug 2026 — a Sun.
• December 2026 data, due 30 Jan 2027 — a Sat.
• April 2027 data, due 30 May 2027 — a Sun.
• September 2027 data, due 30 Oct 2027 — a Sat.
• December 2027 data, due 30 Jan 2028 — a Sun.

The safe reading is that the date is the date: file by the preceding Friday. Waiting for the following Monday is a bet on an extension nobody has published, and the bet is not worth what it wins you.

What being late costs

No fine. The clause does not carry one. What it carries is a contractual record: your Contracting Officer sees a missed obligation, and that feeds into option exercise and contract continuation. Through 31 December 2026 GSA is in a grace period on enforcement; from 1 January 2027 it is not.

The months people miss

• Months with no sales — still reportable.
• The month a contract is awarded, and the month it ends.
• December, because the due date falls at the end of January.
• January, because the due date is in March.

The deadline is the same twelve times a year whether you file it by hand, through a consultant, or with a tool — what each of those costs is the only part that differs. The obligation itself is Transactional Data Reporting, and you file it in the FAS Sales Reporting Portal.