Each program targets a specific owner group, and each needs 51%+ ownership AND control by that group. Pick by who owns/controls the firm — not by which sounds best.

8(a) (13 C.F.R. 124) — socially and economically disadvantaged owners; economic limits (net worth < $850K, income < $400K, assets < $6.5M). A 9-year program with sole-source authority.

SDVOSB (Parts 125/128) — 51%+ owned and controlled by service-disabled veterans (any disability rating); control must be unconditional.

HUBZone (Part 126) — geography-based: principal office in a HUBZone and 35% of employees living in one. Gives a price preference.

WOSB / EDWOSB (Part 127) — 51%+ owned and controlled by women who run day-to-day and strategy; EDWOSB adds economic disadvantage.

Two things people get wrong: you can hold several of these at once if you qualify (an 8(a) firm in a HUBZone owned by a woman can pursue all three). And all of them still require you to be small under your NAICS size standard — the certification doesn't replace the size test.

Certification confirms the ownership/control side. It does not confirm you're still "small" — that's a separate test, and it's the one firms trip on.

Your size is measured as the firm together with all affiliates, by control — the exact same 13 C.F.R. 121.103 affiliation test SBIR uses. A controlling investor, or common ownership across companies, can aggregate you over your NAICS size standard even though your headcount looks fine. A set-aside award you're not actually small for is a protest waiting to happen.

This is the same node the SBIR community cites — one rule, explained once, wherever it applies. See a/SBIR-verified → affiliation for the same test in the SBIR context. Family-owned entities that do business together are presumed affiliated too (121.103(f)).

Self-certification used to be normal for SDVOSB and WOSB. That era is over for set-aside awards — you need an actual SBA certification now.

SDVOSB: on Jan 1, 2023 the VA's veteran programs moved to SBA; a contracting officer will not accept self-certification. NDAA FY2024 then eliminated SDVOSB self-certification even for subcontracts/agency goals. You must be certified in SBA VetCert (13 C.F.R. 128).

WOSB/EDWOSB: to receive a WOSB set-aside award you must be certified by SBA or an SBA-approved third-party certifier — self-certification is not accepted (13 C.F.R. 127).

This isn't paperwork pedantry: claiming a set-aside you're not certified for is a false certification — protest and False Claims Act exposure. If you've been self-certifying, get into VetCert / WOSB certification before you bid the next set-aside.

8(a) requires owners to be socially and economically disadvantaged. How you prove "social disadvantage" is what changed — repeatedly — so old guides contradict each other.

The timeline, factually:

Jul 2023 — in Ultima Services Corp. v. USDA, a federal court enjoined SBA's rebuttable presumption that members of certain racial groups are socially disadvantaged (Fifth Amendment equal protection).

2023–2025 — SBA responded by requiring affected 8(a) participants to submit an individual social-disadvantage narrative.

Jan 22, 2026 — SBA moved to administer 8(a) as race-neutral, eliminating race-based presumptions and disavowing the narrative approach; a proposed rule (June 2026) would formally remove the presumption for individually-owned firms and end the narrative option (comments through Jul 13, 2026).

Note the scope so you don't over-read it: the reforms target individually-owned firms — entity-owned firms (tribes, ANCs, NHOs) are not affected by the presumption change. And this is live rulemaking: the proposed rule isn't final, so exactly what you must submit depends on SBA's current instructions at the moment you apply. Economic-disadvantage requirements are unchanged throughout.