Do you have clients that are classified as small businesses? Small business classifications are determined by the SBA under what are called “North American Industry Classification System (NAICS) codes.” The first two numerical digits describe the overall industry, and the succeeding numbers in the code break down the business industry more specifically. The size standards represent “caps” on each industry, which cannot be exceeded if the business is to be categorized as “small.” The size standard is the average of the previous five full years that an entity has been in business.
Size standards for small businesses are measured by either a company’s gross receipts (“receipts-based standard", usually applicable to the service industries) or by the number of a company’s employees (“employee-based standard,”) usually applicable to manufacturing companies. The U.S. Small Business Administration (SBA) recently (August 22, 2025) published a proposed rule increasing NAICS code caps for receipts-based small businesses. The SBA reviews size standards every five years to determine if certain NAICS codes have to be adjusted to keep up with inflation and other marketing trends.
In this proposed rule, the SBA increased the size standards for NAICS codes in about 250 industries while leaving the NAICS codes for about 230 industries unchanged. The biggest takeaway in the proposed rule is that many small businesses that were and are just above the size standard will either stay classified as “small” or become “small” again under the new size standards. This may have serious implications on whether a company wants to sell or acquire an entity as a small business, not to mention eligibility for small business set-aside contracts, small business loans and other assistance programs.
Please note, however, that this is a proposed rule and not yet a final rule. The comment period ends on October 21, 2025. For a quick general overview, the SBA provided the table below.
