Set-asides explained: 8(a), WOSB, SDVOSB and HUBZone
WinAContract Team · Apr 22, 2026 · 7 min read
Set-asides restrict competition to qualifying small businesses. If you hold the right certification, you compete in a much smaller pool — often the single fastest way for a small firm to start winning.
The 8(a) Business Development program
For firms at least 51% owned by socially and economically disadvantaged individuals. It runs up to nine years and unlocks sole-source awards up to set thresholds — one of the most powerful programs in federal contracting.
WOSB and EDWOSB
Women-Owned Small Business and its economically-disadvantaged variant reserve specific NAICS codes where women-owned firms are under-represented. Certification is required to bid the set-asides.
SDVOSB
Service-Disabled Veteran-Owned Small Business set-asides are especially strong at the VA under its “Vets First” authority, but apply government-wide. Certification now runs through SBA’s VetCert portal.
HUBZone
For firms with a principal office in a Historically Underutilized Business Zone and at least 35% of employees living in one. It adds a price evaluation preference in full-and-open competition on top of the set-asides.
💡 Stack them
Certifications combine. An 8(a) HUBZone firm, or a woman-owned SDVOSB, shows up in more restricted pools — and to buyers chasing multiple socioeconomic goals at once.
Win the next one with AI
WinAContract searches every SAM.gov opportunity and drafts your RFP response. Start free.
Start free →