Find the right industry code for your business
Describe what you do. We search every official US Census and UK ONS index entry and show the NAICS and SIC codes that match, with the reason each one fits.
Popular business types
United States: NAICS
Needed for SBA loans, SAM.gov registration and federal contracts. Each code page shows the official definition, the SBA small business size limit and the closest UK code.
United Kingdom: SIC
Needed when you register a company or file a confirmation statement with Companies House. Each code page lists the activities ONS assigns to it and what changes in SIC 2026.
Where the answers come from
Every code, definition and size limit comes straight from the US Census Bureau, the US Small Business Administration, the Office for National Statistics and Companies House. A daily job checks those files for changes; the data last changed on November 14, 2026. How we build the data.