NAICS guide for service contractors

Why NAICS matters

NAICS determines your small-business size standard, your eligibility for set-asides, and which solicitations you appear in. The wrong primary NAICS can cost you eligibility on contracts you would otherwise win.

Common service NAICS codes

• 541512 — Computer Systems Design Services
• 541513 — Computer Facilities Management Services
• 541611 — Administrative Management & General Management Consulting
• 541618 — Other Management Consulting Services
• 541330 — Engineering Services
• 541715 — R&D in Physical, Engineering, and Life Sciences
• 561110 — Office Administrative Services

Set the right ceiling

Each NAICS has a size standard (revenue or employee count). Confirm yours at the SBA size-standards lookup before claiming small-business status on a solicitation.