Every dollar the federal government spends on contracts moves through one of a small number of doors, and which door a requirement goes through changes who a contractor is competing against, how fast an award happens, and whether a business can even see the opportunity in the first place. The three main paths — the GSA Multiple Award Schedule, a Governmentwide Acquisition Contract, and open-market procurement under full and open competition — are governed by different parts of the FAR, and GSA's own program description makes clear they are not interchangeable strategies so much as different regulatory machinery built for different buying situations.

GSA Multiple Award Schedule: Pre-Priced, Broadly Open

The MAS program — also called Federal Supply Schedule or simply "Schedule" — gives federal, state, local, and tribal buyers access to commercial products and services at prices GSA has already negotiated and determined fair and reasonable. Under FAR Subpart 8.4, a MAS purchase order — regardless of how many contractors are surveyed for competition — is treated as "full and open competition," meaning an ordering agency does not have to separately synopsize the requirement or seek sources outside the Schedule. Ordering procedures scale with dollar value: at or below the micro-purchase threshold, an ordering activity may simply select any qualified Schedule contractor; between the micro-purchase and simplified acquisition thresholds, the activity must survey at least three Schedule contractors; above the simplified acquisition threshold, the contracting officer must issue an RFQ — typically posted to GSA eBuy — broad enough to reasonably expect quotes from at least three contractors. Entry to MAS itself is comparatively open: any qualified vendor can apply for a Schedule contract at any time, there is no fixed number of awardees, and GovConFeed's GSA MAS IT Schedule guide walks through the specific SINs, pricing, and Refresh requirements that apply to IT contractors on Schedule today.

GWACs: Pre-Vetted, IT-Specific, Capped Entry

A GWAC is a different animal. GSA describes its Governmentwide Acquisition Contracts as "pre-competed, multiple-award IDIQ contracts that provide federal agencies with total IT solutions from vetted vendors," and any federal agency — not just the one that manages the vehicle — can use them once its contracting officer obtains a Delegation of Procurement Authority. GSA currently manages five: Alliant 2 and Alliant 3 for broad enterprise IT, Polaris for small businesses across four socioeconomic pools, 8(a) STARS III for SBA-certified 8(a) firms, and VETS 2 for service-disabled veteran-owned small businesses. The tradeoff for that pre-vetted status is that entry is capped and periodic — GWACs hold defined solicitation windows and a fixed pool of awardees rather than year-round open enrollment — so a business that misses an on-ramp can be locked out of that specific vehicle for years. GovConFeed's IDIQ contract vehicles explainer and GWAC comparison of SEWP V, STARS III, Alliant 2, and Alliant 3 break down ceiling values and category structures across the current IT GWAC landscape in more depth than fits here.

Open Market: Full Competition, Full Overhead

Work that does not fit neatly on a Schedule or GWAC — or that an agency chooses not to route through one — goes to open market under standard FAR competition rules. Under FAR 5.101, any proposed contract action expected to exceed $25,000 must be synopsized on the Governmentwide Point of Entry (SAM.gov's Contract Opportunities section), and FAR 5.203 requires that notice to run at least 15 days before the solicitation issues; actions between $20,000 and $25,000 still require public posting for at least 10 days. Full and open competition under FAR Subpart 6.2 means an agency cannot exclude sources without a documented determination and findings signed by the agency head — small business, 8(a), HUBZone, SDVOSB, and WOSB set-asides are the recognized exceptions that do not require that extra justification. In practice, open market means competing against every capable vendor in the country rather than a pre-qualified subset, and it carries more agency-side paperwork to justify each award, which is part of why many agencies default to Schedule or GWAC purchases whenever a requirement fits. Open market is also where small-business set-aside mechanics do most of their work: FAR Subpart 6.2 carves set-asides for small business, 8(a), HUBZone, SDVOSB, and WOSB concerns out of the determination-and-findings requirement that a large-business source exclusion would otherwise need.

A Decision Framework

Three questions do most of the work in choosing which door to pursue. First, does the requirement fit an existing vehicle's scope — IT solutions point toward a GWAC, while broader commercial products or professional services point toward MAS? Second, is speed and administrative simplicity more valuable than a wide competitive field — MAS and GWAC orders skip the FAR Part 5 synopsis and Part 6 competition documentation an agency would otherwise need, which is exactly why agencies favor them. Third, does the business actually hold, or realistically qualify for, a seat on the relevant vehicle — a GWAC a contractor is not on is not a strategy, it is a wall, since most GWAC and many MAS task orders are competed only among existing holders. A small business without Schedule or GWAC access is not shut out of federal work, but it is fighting on open market until it builds the past performance to win a seat on a vehicle — which is itself a common reason agencies point new entrants toward open-market opportunities first.

What It Means for Contractors

Map every recurring requirement your company could plausibly win against the vehicles that already reach your buyers, and treat vehicle acquisition — Schedule or GWAC — as its own long-lead business-development project, not something to start once a specific opportunity appears. If you already hold a MAS contract, check whether your SINs and pricing cover the work an agency is describing before assuming you need to compete open market. If a target agency's spend runs heavily through a GWAC you are not on, budget now for the next on-ramp rather than the current one, since most GWACs do not accept new entrants outside defined windows.

Sources