Whether you count as "small" for a federal contract is not a feeling or a general label. It is a calculation against a specific size standard for a specific NAICS code, measured at a specific moment. Getting it right matters: it decides which set-asides you can compete for, and misrepresenting size can have serious consequences.
What a size standard is
SBA sets a size standard for each NAICS code. As SBA explains, size standards define the maximum size a business — together with its affiliates — can be to qualify as small for a particular contract. Most are expressed either as average annual receipts or average number of employees. SBA notes that many manufacturing businesses with 500 or fewer employees and many non-manufacturing businesses below a receipts-based limit qualify as small, but standards vary widely by industry, so always check the specific code. The official list is in 13 CFR 121.201 and SBA's table of size standards, and SBA's size standards tool walks you through it.
Step 1: Identify the right NAICS code
For a specific contract, the size standard that matters is the one for the NAICS code the contracting officer assigned in the solicitation — not necessarily your primary code. See how to find your NAICS codes.
Step 2: Calculate size the way SBA does
Receipts-based standards
Under 13 CFR 121.104(c), for federal contracting purposes, average annual receipts for a concern in business for five or more completed fiscal years means total receipts over the most recently completed five fiscal years divided by five. For a concern in business less than five complete fiscal years, it is total receipts for the period in business divided by the number of weeks in business, multiplied by 52. "Receipts" has a specific definition in 121.104 — generally total income plus cost of goods sold, with limited exclusions — so read it rather than using a single line from your tax return.
Employee-based standards
Under 13 CFR 121.106, employee counts are averaged over a set period of pay periods — generally the preceding 24 calendar months — and part-time and temporary employees are counted the same as full-time employees. If you have been in business less than 24 months, you average over the pay periods you have been in business.
Step 3: Include your affiliates
This is where many firms get it wrong. Your size includes the receipts or employees of your affiliates. Under 13 CFR 121.103, businesses are affiliates when one controls or has the power to control the other, or a third party controls or has the power to control both — whether or not control is exercised. SBA looks at ownership, management, prior relationships and contractual ties, and considers the totality of the circumstances. Common affiliation triggers include common ownership, shared officers, and heavy economic dependence. If you own or co-own other companies, or another company has significant influence over yours, review the rules carefully.
Step 4: Know when size is measured
Under 13 CFR 121.404(a), a concern, including its affiliates, must qualify as small under the contract's NAICS code as of the date it submits its written self-certification as part of its initial offer or response that includes price. Once awarded a contract as a small business, a firm is generally considered small for the life of that contract, subject to recertification rules — for example, after certain mergers or acquisitions, and for some long-term or multiple-award contracts. So you can grow past a size standard and keep performing an existing contract, but you may not be able to compete for new set-asides under that code.
Step 5: Represent it correctly
- In SAM.gov, list your NAICS codes and size information; SAM shows whether you are small for each code. Keep it current — see SAM.gov registration.
- In each offer, confirm you are small under that solicitation's code before you certify.
- If you are close to a standard, recalculate before every bid.
Size protests
Competitors and contracting officers can challenge an apparent winner's size. Size protests go to SBA, which decides them under its own rules and deadlines (see 13 CFR part 121, subpart C). If you believe a competitor is not small, act quickly after you are notified of the apparent successful offeror — the window is short. If your size is protested, respond promptly and completely.
If you disagree with the NAICS code
If a solicitation's NAICS code, and therefore its size standard, seems wrong for the work, you can file a NAICS code appeal with SBA's Office of Hearings and Appeals within a short deadline after the solicitation is issued (13 CFR 121.1103).
Frequently asked questions
Can I be small for one contract and not another?
Yes. Size depends on the NAICS code assigned to each contract, and different codes have different standards.
Do part-time employees count?
Yes. Under 13 CFR 121.106, part-time and temporary employees are counted the same as full-time employees.
What happens if I grow out of being small?
You can generally keep performing contracts you won as a small business, subject to recertification rules, but you may not qualify for new set-asides under codes where you now exceed the standard.
Do I need an SBA certification to be "small"?
No. Small business status is self-represented in SAM.gov and your offers. SBA certification is required only for specific programs such as 8(a), HUBZone, WOSB/EDWOSB and SDVOSB.
This guide is general information, not legal advice. Rules change — always check the solicitation and the official sources linked here.