In the United States, “small business” is not a matter of opinion. For federal programs it is a status defined by size standards from the Small Business Administration (SBA). This article explains how those standards work, how size is measured, and why the answer can surprise founders.
Why a definition of “small” exists at all
Governments set aside certain contracts and programs for small firms so that they are not always outcompeted by large corporations. To do that fairly, an agency needs a rule that says who qualifies. According to the SBA, meeting the size standard is a basic requirement for competing on contracts set aside for small businesses.
The rule is not one number. A ten-person machine shop and a ten-person consulting firm have very different cost structures, so the SBA assigns a standard to each industry rather than applying one universal cutoff. Readers outside the U.S. will find similar ideas in many countries, but the details below are specific to the American system.
How industries get their own size standard
The SBA ties each standard to a NAICS code. NAICS, the North American Industry Classification System, is the numbering scheme that sorts businesses by what they produce or sell. You match your products or services to a code, then look up that code’s standard in the SBA’s Size Standards Tool or its table of size standards.
Two things follow from this:
- Your size status depends partly on how you describe your own business. Choosing the code that best fits your main products or services matters.
- Two companies with identical revenue can be treated differently if they sit in different industries.
The SBA’s guidance says size standards are reviewed every five years, so a threshold you saw a few years ago may have changed. Always check the current table rather than relying on memory or a blog post, including this one.
Employees or receipts: the two measures
Depending on the industry, size is measured in one of two ways.
| Measure | What it counts | General benchmark on the SBA page |
|---|---|---|
| Employees | People on the payroll | Manufacturers: 500 employees or fewer |
| Annual receipts | Total income plus cost of goods sold | Non-manufacturers: average annual receipts under $7.5 million |
The SBA describes these two benchmarks as general ones, and many industries have exceptions. Treat them as orientation, not as your answer. The per-industry figure for your NAICS code is the one that counts.
Receipts have a specific meaning here. The SBA defines them as total income plus cost of goods sold, typically found on IRS tax forms. That is broader than profit, so your accountant should confirm which line items apply. For a refresher on why revenue, profit and cash tell different stories, see cash flow versus profit.
How is the number averaged?
A single good or bad year does not decide your status. The SBA averages over time.
Counting employees
Employee size is the average number of people employed for each pay period over the latest 24 calendar months. The SBA says to count everyone on the payroll regardless of hours worked or whether the position is temporary. A business that has operated for fewer than 24 months averages over the pay periods it has been in business.
Counting receipts
For federal contracting, receipts are averaged over the latest five complete fiscal years. The SBA notes that its business loan, disaster loan, surety bond and investment company programs may use either three or five years. If a business has not existed for five years, the rule is to multiply its average weekly revenue by 52.
A worked example
The numbers below are hypothetical and chosen only to show the arithmetic. Suppose a non-manufacturing company has had these receipts over five complete fiscal years, in millions of dollars: 4.0, 5.5, 7.0, 9.5 and 11.0.
- Sum: 4.0 + 5.5 + 7.0 + 9.5 + 11.0 = 37.0
- Average: 37.0 / 5 = 7.4
At $7.4 million, the average sits under the general $7.5 million benchmark, even though the latest year alone, at $11.0 million, is well above it. Growth does not instantly remove small-business status because the average lags behind current sales. In practice, the threshold that applies would be the one for the firm’s own NAICS code, which might be higher or lower.
Now take a younger firm, with less than five years of history, that averages $120,000 in weekly revenue. Under the rule above, 120,000 x 52 = $6,240,000, or about $6.24 million.
Does ownership change the answer?
Yes, and this is where many founders are caught off guard. The SBA tells businesses to include the employees or receipts of all their affiliates. Affiliation is a relationship of control between businesses, and the SBA says control counts whether or not it is actually exercised.
According to the SBA page, an external party with 50% or more ownership has control. Control can also arise with considerably less than 50% ownership, for example through contractual arrangements or when one holder’s share is large relative to the other owners.
For a startup, that has practical consequences. A company funded by a larger corporate parent, or one tied to other companies by shared owners or contracts, may need to add those firms’ numbers to its own. A venture-backed founder should therefore discuss affiliation with counsel before assuming a startup is small for contracting purposes. The mechanics of raising money are covered in how startups raise money under SEC exemptions.
What else must a business satisfy?
Passing the numeric test is necessary but not enough. The SBA says a small business must also be:
- For-profit
- Independently owned and operated
- Not dominant in its field on a national basis
- Located and operating in the United States or its territories
A company with a strong U.S. presence but foreign operations should read these conditions carefully. Founders weighing foreign markets may want the questions in expanding across borders before they plan a contract strategy.
What can go wrong: protests, appeals and misstatements
Size is checked, and it can be challenged. The SBA says any interested party can protest the size status of a winning bidder. A company that believes the wrong NAICS code has been chosen for a solicitation must appeal to the SBA’s Office of Hearings and Appeals within 10 days of the solicitation’s publication. That is a short window, so teams that bid on public work should read solicitations as soon as they appear.
The SBA also warns of severe criminal penalties for knowingly misrepresenting size. The lesson is simple: document how you calculated your numbers, keep the payroll and tax records behind them, and recalculate whenever you bid.
A practical checklist before you claim small status
- Identify the NAICS code that best describes your main products or services.
- Look up the current size standard for that code in the SBA’s table or tool.
- Determine whether the standard is based on employees or receipts.
- Calculate the average over the correct period (24 months of payroll periods, or the relevant years of receipts).
- Add any affiliates’ numbers.
- Confirm the non-numeric requirements.
- Keep your workings on file.
Small status can also be a strategic input. A business model that depends on small-business set-asides is exposed to growth, because success eventually pushes the average above the line. That is worth weighing against the ideas in what makes a business model durable.
Why size status deserves a calendar reminder
Size standards look like paperwork, but they quietly shape who can bid for what. They differ by industry, rely on averages instead of snapshots, and extend to affiliates. Founders who understand those three points can plan contract bids, ownership structures and growth timing with fewer surprises.
This article is general information, not financial, investment, tax or legal advice. Size standards change, so confirm current rules with the SBA or a qualified adviser.
Sources: U.S. Small Business Administration
