Census asks employer firms whether two or more members of one family own the majority of the business. In 2023, among firms that answered, 23.1% with 1 to 4 employees said yes, against 40.8% with 250 to 499, a difference of minus 17.7 percentage points. The definition constrains how that gap can be read: among the smallest firms that answered the number-of-owners question, 69.0% are owned by one person, and Census does not count a one-owner firm as family-owned.
The Census Bureau’s Annual Business Survey (ABS) describes its coverage this way: “All domestic, non-farm, for profit businesses with at least one paid employee. Additionally, non-profit organizations (excluding universities) that operate in industries identified as potentially having R&D are sampled.” The 2024 ABS covers reference year 2023. This article uses the Census table of business characteristics by employment size of firm. The unit is the employer firm, counted once, which is different from the Census owner tables, where each owner is counted.
What family-owned means here
Census asks whether two or more members of one family owned the majority of the business. A firm with one owner cannot answer yes, even if that owner’s family depends on the business. So majority family-owned, in this article, means exactly that: two or more relatives together hold the majority. It does not mean that firms outside that definition have no family involvement.
Family-owned and single-owner shares, by firm size
Shares of employer firms that answered each question, with Census’s published standard errors. The 95% intervals are calculated here as the published percentage ± 1.96 × the published standard error:
| Employees | Majority family-owned | 95% interval | Owned by one person | 95% interval |
|---|---|---|---|---|
| 1 to 4 | 23.1% | 22.7 to 23.5 | 69.0% | 68.4 to 69.6 |
| 5 to 9 | 28.3% | 27.9 to 28.7 | 56.6% | 55.6 to 57.6 |
| 10 to 19 | 31.3% | 30.5 to 32.1 | 48.1% | 46.7 to 49.5 |
| 20 to 49 | 34.8% | 34.0 to 35.6 | 38.8% | 36.6 to 41.0 |
| 50 to 99 | 33.2% | 30.8 to 35.6 | 34.0% | 29.3 to 38.7 |
| 100 to 249 | 36.9% | 33.4 to 40.4 | 31.4% | 21.2 to 41.6 |
| 250 to 499 | 40.8% | 33.9 to 47.7 | 22.8% | 10.5 to 35.1 |
| 500 or more | 39.2% | not interpretable (standard error 24.4 points) | 14.0% | 6.9 to 21.1 |
Source: U.S. Census Bureau, 2024 Annual Business Survey (reference year 2023), Characteristics of Businesses by employment size of firm, file AB2300CSCB04, downloaded October 3, 2026. United States, all sectors, all firms. Percentages are Census’s published shares of firms that answered each question. Only the mutually exclusive employment-size classes set in the study’s protocol are shown.
The study’s single registered comparison is the family-owned share at 1 to 4 employees minus the share at 250 to 499: 23.1% minus 40.8%, or minus 17.7 percentage points. Each share has its own interval, calculated from its published standard error. The difference does not, because Census does not publish the covariance between size classes, so no interval is shown for it.
The 500-or-more estimate carries a published standard error of 24.4 percentage points on a 39.2% share. An interval built from it would run below zero. The figure is shown for completeness and should not be used.
How the two ownership measures differ by firm size
Among firms with 1 to 4 employees that answered the number-of-owners question, 69.0% are owned by one person. Among firms with 250 to 499 that answered the number-of-owners question, 22.8% are. Under this definition a one-owner firm cannot be majority family-owned, and one-owner firms make up a much larger share of the smallest firms. The two questions are answered separately, so the table cannot show exactly how the two shares overlap. The higher family-owned share in the 250 to 499 class than in the 1 to 4 class is consistent with that, and the public tables do not allow ownership structure and other size-related differences to be separated. This article does not claim that family ownership itself becomes more common as firms grow, or that family firms grow faster.
The family-owned share does not rise at every step. It is 34.8% at 20 to 49 employees and 33.2% at 50 to 99, and the intervals overlap for 20 to 49 and 50 to 99, for 50 to 99 and 100 to 249, and for 100 to 249 and 250 to 499.
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What the numbers mean for an owner
These are descriptive aggregates for the stated federal-data population. They do not identify causal effects, diagnose an individual company, or estimate the result of adopting a practice. The guidance that follows is operating judgment, not a finding from the data.
Two facts from the table provide context for transition planning. First, among firms with 1 to 4 employees that answered the number-of-owners question, 69.0% report one owner. That makes operational continuity worth addressing, but the table does not show whether a successor has been identified. Second, among firms with 250 to 499 employees that answered the family-ownership question, 40.8% report majority ownership by two or more members of one family. That makes family relationships relevant to ownership planning, but the table does not show how those firms make or settle decisions.
Census does not measure succession plans, and nothing here says family firms are more or less prepared. The operating observation is narrower: when two or more relatives own a majority, future ownership and management decisions may involve both governance arrangements and family relationships. The rights and approvals required depend on the firm’s governing documents and applicable law, so owners should consult qualified legal and tax professionals.
Census does not measure succession plans, and nothing here says family firms are more or less prepared. The operating observation is narrower: when two or more relatives own the majority, decisions about the business’s future need agreement among people whose relationship does not end when the business changes hands.
How to handle it: separate the ownership plan from the management plan
The steps below are an operating recommendation. This study did not test them, and Census does not endorse them.
1. For a single-owner firm, write down who could run it. One owner means one point of failure. Name the person who would run the business for six months if the owner could not, list what that person would need to know, and start transferring it. This is the same work that makes the business easier to sell.
2. For a family-owned firm, separate three questions. Who will own the business, who will run it, and who will be paid by it are different questions. Family firms often answer them together by default. Answering them separately, in writing, avoids treating ownership as a reward for working in the business, or management as a reward for being family.
3. Put the agreement in the documents. A buy-sell agreement among the owners, with a valuation method and funding, can decide in advance what happens if an owner dies, divorces, becomes disabled, or wants out. Without one, those events are settled under pressure. A lawyer and an accountant should draft and review it.
4. Set a date for the review, not just for the plan. Ownership and family circumstances change. A plan reviewed every year or two, on a fixed date, stays usable. A plan written once tends to be out of date when it is needed.
5. Bring in someone outside the family for the hard conversations. An outside adviser or board member who answers to the business, not to any one relative, can raise the questions family members find hardest to raise with each other.
What this data does not tell you
- It does not measure succession plans, family involvement short of majority ownership, or whether family firms perform differently.
- The family-owned definition excludes single-owner firms, which constrains how the size pattern can be read.
- The unit is the firm. It is not comparable to Census owner tables, which count owners.
- The difference between size classes has no published interval, and the 500-or-more estimate is too imprecise to use.
Method
Already published by the agency: Census publishes the family-ownership and number-of-owners percentages and standard errors by employment size of firm. New here: the two measures laid side by side across size classes, the registered comparison between the smallest and the 250-to-499 class, and the explanation of how the definition constrains the pattern.
Source. U.S. Census Bureau, 2024 Annual Business Survey, reference year 2023, Characteristics of Businesses by employment size of firm (AB2300CSCB04), downloaded October 3, 2026. Selection: United States, all firms for sex, ethnicity, race and veteran status, all sectors, and the mutually exclusive size classes shown above. Cells flagged as suppressed or not available would be treated as missing, never as zero. None of the cells used was flagged.
Calculation. Shares and standard errors are Census’s published values. Intervals are the published share ± 1.96 × the published standard error, rounded to one decimal. Before any family-owned or one-owner estimate was viewed, Census’s denominator for these percentages was confirmed, using a different question, to be the firms that answered.
Protocol. The comparison and the size classes were fixed in a dated protocol before any estimate was computed. The protocol (wave 2 section, frozen October 4, 2026) and its dated amendments are at https://kamyarshah.com/public-data-protocol/
Check. All percentages and standard errors shown were recomputed from the raw file by a separately written program, built without access to this study’s results, and matched. The family-owned percentages and standard errors also match the Census API (2023 ABS business characteristics) exactly. The difference and the intervals were recalculated from those values.
The agencies did not review or endorse this analysis. Kamyar Shah sells fractional COO and CMO services.
Questions about this analysis can be sent through https://kamyarshah.com/contact/.
