2026 GSAR Overhaul Timeline Driving Vendor Impact

2026 GSAR Overhaul Timeline Driving Vendor Impact in Federal Procurement

2026 marks a pivotal year for the GSAR Overhaul (RGO), GSA's modernization effort to align the General Services Administration Acquisition Regulation with the FAR Overhaul (RFO) and EO 14275-driven reforms. In 2025–2026, the government advanced class deviations, including RFO-2025-FSS-GSAR 538, to migrate FSS/MAS procedures into GSAR, signaling a broader transition of procurement workflows into GSAR. Vendors should anticipate continued policy updates, the decommissioning of legacy reporting systems like eSRS, and the wind-down of old subcontracting reporting processes as SAM.gov expands its functionality in 2026, with guidance published through Acquisition.gov and GSA policy notices.

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What Are GSAR Overhaul (RGO)?

GSAR Overhaul (RGO) is the ongoing initiative to modernize the General Services Administration Acquisition Regulation (GSAR) to align with the FAR Overhaul (RFO). The objective is to simplify non-statutory language, reduce procurement complexity, and publish agency-level deviations under the RFO framework. The overhaul is anchored in EO 14275 and related M-25-26 memos, with 2025–2026 waves delivering changes such as the migration of FSS/MAS procedures into GSAR subpart 538. This translation of MAS processes into GSAR is designed to accelerate procurement cycles while maintaining accountability.

Sources: [16] Revolutionary GSAR Overhaul - Acquisition.gov, [1] GSAR Overhaul - Acquisition.gov, [9] RFO-2025-08/42/51 (Context), [10] RFO-2025FSSGSAR-538 (Official)

Key 2026 Changes Under RGO and GSAR 538

In 2026, several changes are converging: (a) the FSS/MAS ordering procedures are codified under GSAR subpart 538 as part of the FAR Overhaul alignment; (b) active class deviations like RFO-2025-FSS-GSAR 538 (effective around November 3, 2025) continue to be refined and implemented; (c) the decommissioning and consolidation of legacy reporting systems—eSRS transitioning to SAM.gov—advances in 2026; (d) regulatory signals from FR notices and EO 14275 confirm the broader reform direction; (e) procurement forecasting remains a critical planning tool to map MAS/FSS opportunities in this new framework.

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Shift of FSS/MAS ordering procedures into GSAR 538 under RFO alignment (watch RFO-2025-FSS-GSAR 538 for effective dates) - Source 10
eSRS decommissioning in early 2026 with SAM.gov subcontracting reporting expansion in Q2 FY 2026 (data migration readiness a must) - Sources 12, 13, 22
Forecast of Contracting Opportunities remains the leading planning tool for MAS/FSS opportunities under the revised GSAR framework (last updated Jan 24, 2025) - Sources 2, 21
SAM.gov data migration readiness: begin data collection and validation now to support 2026 transition - Sources 12, 18

How GSAR Overhaul Works

The GSAR Overhaul operates by translating the FAR Overhaul (RFO) framework into GSAR through class deviations and new subparts. EO 14275 provides the policy mandate; GSA publishes RGO deviations (notably RFO-2025-FSS-GSAR 538) to move MAS/FSS ordering into GSAR subpart 538. This keeps procurement rules policy-driven, reduces non-statutory language, and aligns with streamlined processes. The 538 deviations specify ordering procedures for MAS/FSS under GSAR; concomitant modernization includes migrating reporting from eSRS to SAM.gov and updating forecasting and contract-opportunity postings. The changes are being rolled out in 2025–2026 with ongoing updates into 2026.

Sources: [16] Revolutionary GSAR Overhaul - Acquisition.gov, [1] GSAR Overhaul - Acquisition.gov, [10] RFO-2025FSSGSAR-538 (Official), [6] CD202511 - GSAR Class Deviation (RFO), [12] Subcontracting Plan Reporting in SAM.gov, [2] Forecast of Contracting Opportunities - GSA, [21] Forecast of contracting opportunities (duplicate), [22] New timeline for decommissioning esrsgov (update)

What This Means for Government Contractors

For vendors, this means: (1) align proposal templates and pricing to the GSAR 538 flow; (2) ensure MAS/FSS bidding incorporates the new GSAR 538 procedures; (3) implement data migrations to SAM.gov for subcontracting reporting; (4) monitor Forecast of Contracting Opportunities for MAS/FSS leads; (5) maintain SAM.gov registration; (6) train staff on RGO/RFO language. The shift to GSAR 538 affects how opportunities are solicited, priced, and administered, so internal governance must reflect the new requirements and deviations.

Sources: [1] GSAR Overhaul - Acquisition.gov, [10] RFO-2025FSSGSAR-538 (Official), [2] Forecast of Contracting Opportunities - GSA, [12] Subcontracting Plan Reporting in SAM.gov, [18] Subcontracting Plan Reporting in SAM.gov (Esrs), [21] Forecast of contracting opportunities (duplicate), [6] CD202511 - GSAR Class Deviation (RFO), [16] Revolutionary GSAR Overhaul - Acquisition.gov

Pro Tip

Begin SAM.gov registration and data migration readiness in 2025; map MAS/FSS opportunities to GSAR 538 workflows; train proposal teams on new deviation language.

GSAR Overhaul (RGO) 538 changes at a glance
Aspect	2026 Status
FSS/MAS Ordering	Migrated to GSAR 538 as part of RFO alignment (Nov 2025)
eSRS Migration	Decommissioning planned for early 2026; SAM.gov transition in 2026
Regulatory Basis	EO 14275, M-25-26, RFO framework
Forecast Tool	Last updated 2025-01-24; planning reference for MAS/FSS
MAS/FSS Guidance	Shifted into GSAR 538 and ongoing deviations

Key Takeaways for Government Contractors

2026 marks continued GSAR absorption of MAS/FSS; ensure internal policies reflect GSAR 538 flow
eSRS decommissioning and SAM.gov subcontracting reporting expand in 2026; plan data migration
Use Forecast of Contracting Opportunities for MAS/FSS planning under the updated framework
Train teams on RGO/RFO language and update SOPs to GSAR-based processes
Begin SAM.gov registration and data migration readiness early (2025–Q2 2026)

Sources & Citations

1. GSAR Overhaul - Acquisition.gov [Link ↗](regulation)

2. Forecast of Contracting Opportunities - GSA [Link ↗](government site)

3. Federal Register 2025-01-31 [Link ↗](regulation)

2026 GSAR Overhaul Timeline Driving Vendor Impact 2026