Small business statistics, from the SBA Office of Advocacy.

"Small business" is a phrase everyone uses and few can size. The U.S. Small Business Administration's Office of Advocacy is the authoritative source — it compiles Census Bureau data under a single definition — so every figure on this page comes from it, stamped with the report it appears in.

The small-business figures

The figures below come from the Office of Advocacy, which for research purposes generally defines a small business as an independent business with fewer than 500 employees. That definition is why the count reaches tens of millions: it includes the vast number of sole proprietors and non-employer firms alongside small employer companies. Counts are from the 2025 Small Business Profile and the 2026 Frequently Asked Questions publication.

Statistics verified: July 2026 · re-verified quarterly against source

Taken together, these figures make one point clearly: small businesses are not a corner of the economy but most of it by count, and a large share of it by employment and output. They are 99.9 percent of U.S. businesses, employ nearly half the private-sector workforce, and generate more than four in every ten dollars of GDP. That is the context in which bookkeeping matters — the books being kept across 36 million small firms are, collectively, the ledger of most of American enterprise.

What the numbers mean for accounting

The scale is the argument. When 36.2 million businesses each need books that reconcile and reports that can be trusted, the quality of small-business accounting is not a specialist concern — it is an economy-wide one. Most of those firms run on a handful of tools, QuickBooks prominent among them, and most are staffed too leanly to have a full accounting department checking the work. That gap between how much bookkeeping the economy needs and how little review most files get is exactly where a cleanup earns its keep.

For your own business, the national numbers are backdrop; the questions that matter are local to your file. A free review answers them directly — does every account reconcile, does the balance sheet balance, does the profit-and-loss reflect how the business actually ran — with no figure estimated or invented along the way. That is the same standard we hold these statistics to.

Ready to see your own file measured against that standard? Start with a free QuickBooks review, or read the reference docs behind the work.