What are 8(a), HUBZone, SDVOSB and WOSB set-asides?
They are four SBA programs that restrict competition on federal contracts to certified firms. 8(a) covers socially and economically disadvantaged owners, HUBZone covers firms based in and hiring from underused areas, SDVOSB covers service-disabled veteran owners, and WOSB covers women owners. Each has its own certification, and a firm can hold several at once.
/mcp. Nothing here needs an API key or a signup.
All four sit inside the small business set-aside system rather than beside it. A firm must first be small under the SBA size standard for the contract's NAICS code; the socioeconomic certification then narrows the field further.
The four programs side by side
| Program | Core requirement | Certification | Time limit |
|---|---|---|---|
| 8(a) | 51% owned and controlled by socially and economically disadvantaged US citizens | SBA | 9 years, once per person |
| HUBZone | Principal office in a HUBZone, 35% of employees living in one | SBA | None, recertify every 3 years |
| SDVOSB | 51% owned and controlled by veterans the VA rates as service-disabled | SBA VetCert | None |
| WOSB | 51% owned and controlled by women who are US citizens | SBA | None, recertify every 3 years |
The 8(a) nine-year term is the outlier and it drives real behaviour. The program runs as a four-year developmental stage followed by a five-year transitional stage, an individual can use it only once, and firms plan their whole growth curve around the exit date.
What each certification actually buys
Certification is not a marketing badge. It changes which competitions a firm is allowed to enter, and in two cases it changes the arithmetic of the bid itself.
- 8(a) allows sole-source awards without competition up to $8.5 million for
manufacturing NAICS codes and $5.5 million for everything else. Tribally owned and Alaska Native entities operate under higher thresholds with agency approval.
- HUBZone carries a 10% price evaluation preference in full and open
competition. A HUBZone firm bidding within 10% of a non-HUBZone competitor can win on price after the preference is applied.
- SDVOSB requires SBA VetCert certification for set-aside and goaling
purposes. Self-certification was phased out, so a firm that never completed certification is no longer eligible for these awards.
- WOSB restricts competition to certified women-owned firms in industries SBA
has identified as underrepresented, with an economically disadvantaged tier (EDWOSB) on top.
The economic disadvantage thresholds
8(a) and EDWOSB both test the owner's personal finances, using the same three numbers:
| Test | Threshold |
|---|---|
| Personal net worth | $850,000 |
| Adjusted gross income, 3-year average | $400,000 |
| Total assets | $6.5 million |
Equity in the primary residence and in the business itself is excluded from the net worth calculation, which is why owners of asset-heavy firms still qualify. HUBZone and SDVOSB apply no personal wealth test at all.
How much money sits behind these programs
The statutory government-wide goal is 23% of federal prime contract dollars to small businesses. In fiscal year 2025, SBA reported that agencies awarded nearly 28% of prime contract dollars, or $179 billion, to small businesses. Within that:
- Small disadvantaged businesses took 11.6%, or $75.3 billion
- 8(a) participants specifically took 3.7%, or $24.3 billion
- SDVOSB firms took $32.5 billion
- The HUBZone goal is 3% of prime contract dollars
Goals are targets rather than guarantees, and agencies miss individual categories routinely even while the overall number clears the bar.
Finding the awards that actually went out
Set-aside type is a field on every award record, so you can watch which requirements are being restricted rather than reading the goal report a year late:
# free, no key, no wallet: recent small business set-aside awards curl "https://thebotwire.com/contracts/preview?size=small-business&since=14d" # paid, $0.01: set-aside awards matching a scope, up to 50 records curl "https://thebotwire.com/contracts/latest?q=janitorial&size=small-business&since=30d&limit=50"
The contracts wire ranks set-aside awards first and returns the winner, agency, amount and place of performance for each. For the mechanics of how a requirement becomes a set-aside in the first place, see what a small business set-aside is, and for the timing of when these records publish, the award data lag guide. Pricing and route details are at /docs.
FAQ
Can a business hold more than one certification?
Yes, and many do. A firm owned by a service-disabled veteran who is also socially and economically disadvantaged, operating from a HUBZone, can hold all three. Each certification is evaluated separately, and holding several widens the set of competitions the firm can enter.
Does an 8(a) firm lose everything after nine years?
It loses access to 8(a) set-asides and sole-source awards, not its contracts. Awards already held run to their period of performance end date. Other certifications the firm holds continue, which is why many 8(a) participants pursue HUBZone or SDVOSB status well before graduation.
What happens if a HUBZone firm's employees move away?
The 35% employee residency requirement is continuing, not a one-time test at certification. Firms recertify every three years and must maintain the ratio throughout, so hiring decisions and the certification are permanently linked.
Are these programs the same as the size standard?
No. The size standard determines whether a firm counts as small for a given NAICS code, measured by employee count or average annual receipts. Socioeconomic certification is a second, separate filter applied on top. A firm must pass both to win one of these set-asides.
Sources
Program requirements and thresholds come from SBA: 8(a) Business Development, HUBZone and veteran contracting programs. Fiscal year 2025 figures are from SBA's FY25 small business contracting scorecard release.
Related: What is a small business set-aside contract? · How do I find subcontracting opportunities after a prime wins?