Eight federal set-aside types. Each restricts competition differently. This is the cheat sheet you can keep open while reading SAM.gov solicitations.
The set-aside types
| Code | Type | Applies when |
|---|---|---|
| SB | Small business | Default protection for any firm under the NAICS size threshold |
| 8(a) | 8(a) Business Development | Disadvantaged-owned, 9-year program window |
| WOSB | Women-Owned Small Business | Female ownership ≥51%, in NAICS where women are underrepresented |
| EDWOSB | Economically Disadvantaged WOSB | WOSB + personal net worth tests |
| SDVOSB | Service-Disabled Veteran-Owned | Veteran-owned, service-connected disability |
| HUBZone | Historically Underutilized Business Zone | Principal office in qualified census tract |
| AbilityOne | AbilityOne Program | Severely disabled employees, mostly commodities |
| TVA | Total Veteran Awareness | Veteran-owned (any disability status) |
How agencies actually choose
The Federal Acquisition Regulation (FAR Part 19) requires agencies to consider small-business set-asides on every applicable solicitation. Their actual decision tree:
- Is the work suitable for AbilityOne? (rare, mostly commodities)
- If two or more 8(a) firms are likely capable, set aside 8(a).
- If two or more HUBZone firms are likely capable, set aside HUBZone.
- If two or more SDVOSB firms are likely capable, set aside SDVOSB.
- If two or more WOSB-eligible firms are likely capable in the NAICS, and the NAICS is on the WOSB-eligible list, set aside WOSB.
- If small businesses can’t compete the work, full and open.
In practice, the agency’s micro-purchase officer makes this call, typically using their own historical experience plus a quick SAM.gov vendor lookup.
Dollar-band patterns
Each set-aside type clusters around a specific dollar range. Knowing the typical band tells you whether your firm should pursue:
- 8(a) sole-source: $0-$4M per award (federal cap)
- 8(a) competitive: $4M-$25M typical band
- HUBZone: $0-$10M typical band, often construction
- SDVOSB: $0-$15M typical band, service-heavy
- WOSB / EDWOSB: $0-$10M typical band
- Small business: $0-$50M, the broadest band
Bidding outside your typical band is expensive. A 50-person firm chasing a $40M small-business award is bidding against 200-person firms who’ll out-resource them. A 200-person firm chasing a $2M 8(a) competitive is bidding against 20-person firms who’ll out-price them.
What to do with this
Two practical steps:
- Confirm your certifications are current. SBA’s certification tracker is updated monthly; SAM.gov reflects with a 24-72 hour lag. If you let an 8(a) certification lapse, you become invisible to the 8(a) set-aside flow until you re-certify.
- Filter your search by your real eligibility. Don’t waste time reading SDVOSB solicitations if you’re not SDVOSB. The most common time-sink in federal BD is reading solicitations you can’t bid on.
VectorBrief’s set-aside filter takes your certifications + size class as inputs and surfaces only the solicitations where you’re structurally eligible. /pricing.