GSA TDR Reporting Requirements: 2026 Guide for MAS Contractors

01

Who must follow GSA TDR reporting requirements?

MAS Solicitation Refresh 31 made Transactional Data Reporting mandatory for all MAS Special Item Numbers. That ended the old model in which only selected SINs participated in MAS TDR.

For an existing non-TDR MAS contractor, GSA describes two distinct actions: accept the Refresh 31 mass modification and accept the Participate in TDR modification. The contract remains under its non-TDR terms until the Participate in TDR modification’s effective date. GSA says the TDR effective date aligns to the first day of a sales-reporting quarter after acceptance.

New MAS offers are also subject to TDR. The current GSA requirements page says TDR does not presently apply to VA Schedule contracts, so “all SINs” means all SINs in the GSA MAS solicitation—not every federal contract vehicle that happens to use the initials TDR.

02

TDR sales reports are monthly and due within 30 calendar days.

The governing cadence is straightforward: report transactional data within 30 calendar days after the last calendar day of each month. GSA uses October sales due November 30 as its example. The same window applies to a zero-sales confirmation.

Reports must be submitted chronologically. FAS SRP will require an older missing period—including a zero-sales month—to be completed before a later month can be reported. Do not let “nothing to report” become a gap in the reporting sequence.

For a closer look at the transition cutoff, read what the December 31, 2026 TDR deadline actually means.

03

Report MAS sales, not every government sale in the ledger.

TDR starts with scope. GSA instructs contractors to report products and services directly linked to their MAS contract, including applicable orders under MAS BPAs. Sales under unrelated commercial contracts or other government vehicles do not become MAS-TDR sales simply because the customer is a federal agency.

A Contractor Teaming Arrangement does not create one blended filing. GSA treats each CTA member as a prime contractor for this purpose; each member reports what it provided under its own contract number and terms. That makes contract number, order number and seller identity part of the scope decision—not mere formatting fields.

04

“Up to 21 data elements” does not mean 21 values on every line.

GSA’s current Transactional Data Reporting requirements page lists up to 21 elements for products and 15 for services. Those counts are ceilings across reporting scenarios. Applicability depends on whether the line is a product or service, its SIN, its catalog record and which fields are available in the current FAS SRP template.

GSA’s instruction is practical: complete data elements when they are present in the FAS SRP template. Order type, worksite and order discount are listed in the requirements but were not yet implemented in the template when this article was checked. Download the current template for each reporting cycle and do not add your own columns in anticipation of a future release.

For labor-hour and time-and-materials work, see the separate guide to GSA TDR services, UCIDs and labor-category reporting.

05

Choose one reporting basis, then make the line-item arithmetic reproducible.

A MAS-TDR contractor may report sales based on invoices issued or payments received. GSA requires the chosen method to remain consistent. The choice changes which transactions land in a month, so it should be written into the close procedure rather than re-decided when an invoice straddles month-end.

For most ordinary rows, total price is quantity multiplied by price paid per unit and must include IFF. The upload instructions recommend rounding that product to two decimals. Returns, discounts, highly configurable products and fixed-price services have scenario-specific instructions; do not force those transactions through the ordinary-row formula without reading the matching GSA table.

The arithmetic is the easy control. The harder controls prove that 80 hours belong to this month, this order, this awarded labor category, this SIN and this funding agency. Keep those decisions reviewable.

06

Monthly sales reporting and quarterly IFF payment are separate obligations.

TDR sales data is reported every month. The Industrial Funding Fee is remitted within 30 days after the end of each quarter, although GSA allows contractors to pay monthly if they prefer. A monthly report must still state prices inclusive of IFF even when payment waits until quarter-end.

Reconcile the portal-calculated fee to the source sales population before payment. A timing difference between a monthly sales report and quarterly remittance should be explainable; an unexplained difference between sales and IFF is a control problem.

07

A monthly GSA TDR reporting checklist

1. 1
   Confirm the period.

   Use the contract’s effective date and the next reporting period shown in FAS SRP.

2. 2
   Freeze the source population.

   Select transactions using the documented invoice-or-payment basis and preserve the extract reviewed.

3. 3
   Reconcile scope.

   Tie the source total to included MAS sales, exclusions, returns, credits and other adjustments.

4. 4
   Classify each line.

   Apply the GSA instructions for the actual product or service scenario before populating conditional fields.

5. 5
   Use the current reporting format.

   Download the latest SRP template and preserve its tabs, headings, column order and formatting.

6. 6
   Review and submit.

   Check identifiers, catalog matches, required blanks and arithmetic; then retain the approval and exact submitted version.

7. 7
   Close the feedback loop.

   Record the SRP result, resolve compliance flags and roll corrections into the next monthly process.

08

Common GSA TDR requirement questions