A federal set-aside contract restricts competition to businesses that meet specific eligibility criteria. Instead of competing against large defense contractors and Fortune 500 companies, your only competition is other businesses in the same certified category.
Set-asides exist because Congress set statutory goals for federal small business contracting. Achieving those goals requires contracting officers to direct work to eligible businesses. The set-aside mechanism is how they do it.
The Rule of Two
The Rule of Two governs when a contracting officer must set aside a contract. Under FAR 19.502-2, an acquisition must be set aside for small business participation when the contracting officer determines there's a reasonable expectation that:
- Offers will be received from at least two responsible small business concerns, and
- Award will be made at a fair market price
"Reasonable expectation" doesn't require certainty. If market research suggests two or more qualified small businesses could do the work at a reasonable price, the contracting officer should set aside the procurement. Agencies that routinely fail to conduct adequate market research or that create artificial barriers to set-asides face scrutiny from the SBA's Office of Government Contracting.
The Rule of Two applies to all small business set-aside categories. For 8(a) sole-source awards, the threshold-based rules below apply instead.
The five main set-aside types
1. Small business set-aside
The broadest category. Any business that meets the SBA size standard for the applicable NAICS code qualifies. Governmentwide goal: 23% of prime contract dollars annually (15 U.S.C. § 644(g)).
Small business set-asides apply to all acquisitions between $10,000 and the simplified acquisition threshold ($250,000) and to larger acquisitions when the Rule of Two is met. Contracts under $10,000 are generally not set aside.
2. 8(a) Business Development Program
The 8(a) program serves small businesses owned by socially and economically disadvantaged individuals. Eligibility requires both social disadvantage (membership in a designated group or demonstrated individual disadvantage) and economic disadvantage (personal net worth under $750,000 at initial certification, excluding equity in the business and primary residence).
The program runs for nine years, with a four-year developmental stage and a five-year transition stage. Participants receive preference through both competitive set-asides (competed among 8(a) firms) and sole-source awards.
Sole-source thresholds for 8(a): - Goods and services: up to $4.5 million - Manufacturing: up to $7 million
When a contracting officer identifies an 8(a) firm that can meet the requirement, they can award directly without a competitive process up to these thresholds. The award is negotiated with SBA approval. Above these thresholds, 8(a) contracts must be competed among 8(a)-certified firms.
Governmentwide goal: 5% of prime and subcontract dollars to small disadvantaged businesses.
3. HUBZone
HUBZone (Historically Underutilized Business Zone) set-asides restrict competition to small businesses located in designated HUBZone areas that also maintain 35% of their workforce from HUBZone areas.
The SBA maintains the list of designated HUBZone areas — including qualified census tracts, qualified non-metropolitan counties, Indian reservations, redesignated areas, and base closure zones. HUBZone status must be re-certified annually.
Sole-source thresholds for HUBZone: - Goods and services: up to $4.5 million - Manufacturing: up to $7 million
The contracting officer must be able to make a reasonable determination that award can be made at a fair market price, and that only one HUBZone firm can meet the requirement.
Governmentwide goal: 3% of prime and subcontract dollars.
4. Women-Owned Small Business (WOSB/EDWOSB)
WOSB set-asides are available in industries where women-owned businesses are substantially underrepresented, as determined by the SBA's triennial study. The SBA publishes the list of eligible NAICS codes in 13 C.F.R. Part 127. EDWOSB set-asides are available in a broader set of NAICS codes — essentially all industries — but require the owner to meet the economic disadvantage standard (personal net worth under $850,000, adjusted assets under $6.5 million, and adjusted gross income averaged over three years under $400,000).
Sole-source thresholds for WOSB/EDWOSB: - Goods and services: up to $4.5 million - Manufacturing: up to $7 million
These sole-source authorities were added by the National Defense Authorization Act for FY2015 and codified at 15 U.S.C. § 637(m). They apply only to the NAICS codes eligible for WOSB or EDWOSB set-asides.
Governmentwide goal: 5% of prime and subcontract dollars.
5. Service-Disabled Veteran-Owned Small Business (SDVOSB)
SDVOSB set-asides restrict competition to small businesses where the owner is a veteran with a service-connected disability rated by the VA or DoD.
Sole-source thresholds for SDVOSB: - Goods and services: up to $4.5 million - Manufacturing: up to $7 million
Within the Department of Veterans Affairs, SDVOSBs and VOSBs benefit from additional preference through the VA's Veterans First Contracting Program. The VA is required to award to SDVOSB firms before opening competition to VOSBs, and to VOSBs before opening to the general small business pool (38 U.S.C. § 8127). The VA's Vets First program has different dollar thresholds and procedures from non-VA federal contracting.
Governmentwide goal: 3% of prime and subcontract dollars.
Simplified acquisition threshold and micro-purchase threshold
Two additional thresholds shape how set-asides work in practice:
Simplified acquisition threshold (SAT): $250,000. Acquisitions below the SAT use simplified procedures. All acquisitions at or above $3,000 and below $250,000 are automatically reserved for small business participation unless the contracting officer determines that two or more small businesses won't compete.
Micro-purchase threshold: $10,000. Acquisitions below this amount are exempt from small business set-aside requirements, though agencies may still choose to use small businesses.
Commercial items: The SAT is raised to $750,000 for acquisitions of commercial items by civilian agencies and $1.5 million for DoD.
The 8(a) competitive threshold
Within the 8(a) program, sole-source authority applies up to $4.5 million. Above that threshold, the contracting officer can still do an 8(a) set-aside, but it must be competed among 8(a)-certified firms. This means even large contracts can be restricted to 8(a) participants.
One frequently misunderstood aspect of 8(a) sole-source: the SBA negotiates the award on behalf of the 8(a) firm, and the agency can decline to award if the price is unreasonable. The process involves a requirement package, acceptance by SBA, and a negotiation phase. It's streamlined compared to full competition, but not instant.
How set-asides are found in SAM.gov
Every federal solicitation posted on SAM.gov (sam.gov/content/opportunities) includes a "Set-Aside Type" field in the solicitation synopsis. Common values include:
- Total Small Business Set-Aside
- 8(a) Set-Aside / Sole Source
- HUBZone Set-Aside / Sole Source
- Women-Owned Small Business Set-Aside
- Economically Disadvantaged Women-Owned Small Business Set-Aside
- Service-Disabled Veteran-Owned Small Business Set-Aside
- Veteran-Owned Small Business Set-Aside
You can filter SAM.gov opportunity searches by set-aside type. Set up a saved search for the NAICS codes relevant to your business with a filter for your applicable set-aside type, and configure email notifications.
Price evaluation preferences
Beyond set-asides, HUBZone businesses get an additional price evaluation adjustment in open competitions: the government compares HUBZone bids to non-small-business bids with a 10% price preference. If the lowest bid is from a non-small-business at $100,000, a HUBZone bid of up to $110,000 is considered equally competitive. This preference applies in unrestricted acquisitions where HUBZone firms compete against larger businesses.
8(a) competitive set-asides don't use price preferences — the competition is already restricted to 8(a) firms.
Common mistakes businesses make
Letting certifications lapse: Set-aside eligibility requires an active certification at the time of proposal submission and at contract award. If your WOSB certification expires before award, you may be disqualified even if you were certified when you submitted.
Misidentifying the applicable NAICS code: The set-aside eligibility determination uses the NAICS code assigned to the solicitation, not your primary business NAICS code. Verify you meet the size standard for the solicitation's NAICS before bidding.
Treating set-asides as guaranteed work: A set-aside restricts competition; it doesn't eliminate it. You still compete against other certified firms. Many 8(a) set-asides receive 5 to 15 proposals. Price, technical approach, past performance, and management approach all matter.
Not tracking 8(a) graduation: The 8(a) program has time limits. Track your graduation date and plan for competitive acquisitions post-graduation. Some businesses are unprepared for full competition after years of set-aside access.
Next steps
- Register in SAM.gov at sam.gov. Active SAM.gov registration is required to receive any federal contract award. Registration is free and takes 10-15 business days.
- Identify your applicable set-aside certifications based on your ownership and location. Use the certification guides on this site for 8(a), HUBZone, WOSB, SDVOSB, and VOSB.
- Set up SAM.gov opportunity alerts for the NAICS codes relevant to your business, filtered by your set-aside type.
- Contact your APEX Accelerator for help identifying specific set-aside opportunities in your area and agency target list.
- Research your target agencies: Not all agencies have equal set-aside budgets in your industry. USASpending.gov lets you see which agencies award contracts in your NAICS code and what portion goes to small and disadvantaged businesses.
