SBA Small Business Size Standards
Size status is the foundation under every small business certification. It is determined per NAICS code, using either average annual receipts or employee count, and it includes the receipts and employees of all affiliates.
- Who it's for
- Any firm claiming small business status
- Primary benefit
- Eligibility for all small business set-asides
- Term / renewal
- Self-certified in SAM, verified at proposal
- Certifying authority
- U.S. Small Business Administration
Key takeaways
- Certification opens doors — it does not win proposals on its own.
- Keep your SAM.gov registration, NAICS list, and capability narrative synchronized with the certification record.
- Target set-aside solicitations where the certification narrows the field to a handful of credible bidders.
- Pair the certification with same-scope past performance to convert eligibility into awards.
Eligibility requirements
Receipts-based standards use a five-year average of annual receipts; employee-based standards use a 24-month average headcount, counting all employees including part-time. Affiliation rules pull in commonly controlled entities, which is where firms most often miscount.
How to apply
Calculate size for each NAICS code you register, document the calculation, and certify in SAM.gov. Re-verify at each proposal submission, since size is determined as of the date of your initial offer including price.
How to use it competitively
Track your position against the size standard as a strategic milestone. Firms that plan the transition out of small business status — building full-and-open past performance and vehicle positions two to three years ahead — survive the cliff; firms that don't lose their pipeline overnight.
FAQ
What if I exceed the standard mid-contract?
You generally remain small for the life of the existing contract, but must recertify at defined points such as option exercises on some vehicles and after a merger or acquisition.
Do affiliates count?
Yes. Receipts and employees of affiliates are included under SBA affiliation rules.
Which NAICS applies?
The one the contracting officer assigns to the solicitation, which controls the applicable size standard for that bid.
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