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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.

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.

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