Small Business Set-Aside

A small business set-aside is a federal contracting mechanism that limits competition for a specific acquisition to firms that qualify as small businesses under the applicable size standard for the relevant NAICS code. When the contracting officer determines that two or more small businesses are likely to submit competitive offers at fair market prices, the acquisition must be set aside.

What is a Small Business Set-Aside?

The Federal Acquisition Regulation (FAR) Part 19 establishes the legal foundation for set-asides. Under FAR 19.502-2, all acquisitions between $10,000 and the simplified acquisition threshold ($250,000) are automatically set aside exclusively for small businesses unless the contracting officer cannot identify two or more capable small businesses likely to compete. Above the simplified acquisition threshold, set-asides are applied when the rule of two is met.

Set-asides come in several forms. A total small business set-aside restricts the entire requirement to small businesses. A partial small business set-aside reserves a portion of a larger acquisition for small businesses while leaving the remainder open to all offerors. Beyond these general categories, targeted set-asides exist for 8(a) Business Development Program participants, HUBZone firms, SDVOSBs, and WOSBs.

The SAM.gov opportunity listing will identify the set-aside type in the solicitation synopsis. The type_of_set_aside_code field in USAspending data allows analysts to filter awarded contracts by set-aside category. The government holds statutory goals requiring that 23% of all federal prime contracting dollars go to small businesses, with sub-goals for each socioeconomic category.

Why Small Business Set-Asides Matter for Government Contractors

Set-asides dramatically reduce competitive field size. A full and open procurement on a $5M IT services contract may attract 20 or more offerors; the same contract set aside for small businesses typically draws three to eight competitors. For small businesses, identifying solicitations with matching set-aside codes is a foundational go/no-go filter. Pursuing an 8(a)-set-aside contract without 8(a) certification wastes resources; winning one reserved for your category can define your revenue for years.

Example

A Department of Homeland Security IT services contract valued at $8M is set aside for total small businesses with NAICS code 541512 (Computer Systems Design) and a size standard of $34M in average annual receipts. Only small businesses at or below that revenue threshold may submit offers, immediately excluding most large system integrators from competition.

Frequently Asked Questions

What is the rule of two for small business set-asides?

The rule of two requires a contracting officer to set aside an acquisition when there is a reasonable expectation that at least two responsible small businesses will submit offers at fair market prices. If only one small business is likely to compete, the officer may proceed with a sole-source small business award or open to full competition.

Can a large business bid on a small business set-aside contract?

No. A large business is not eligible to receive award on a contract set aside for small businesses. If a large business submits an offer, the contracting officer must reject it as nonresponsive. Teaming arrangements where a large business mentors a small business do not change this eligibility restriction unless the arrangement qualifies under the SBA's mentor-protege rules.

How do I find set-aside opportunities on SAM.gov?

On SAM.gov Contract Opportunities, use the Set-Aside Type filter when searching. Options include Total Small Business (SBA), 8(a) Competitive and 8(a) Sole Source, HUBZone Competitive, SDVOSB Competitive, and WOSB/EDWOSB. You can also filter USAspending.gov award data by type_of_set_aside_code to analyze historical award patterns by agency and NAICS code.

What happens if a small business grows beyond the size standard after winning a set-aside contract?

The contractor must recertify its size status at certain contract milestones, including upon exercising option periods on contracts over five years. If the firm has grown above the size standard at recertification, it may be ineligible for future options under some programs, though it generally retains the base contract. Specific rules vary by program; the SBA and FAR Subpart 19.3 govern recertification requirements.