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Free NAICS Code Lookup Tool

Find the right NAICS codes for government contracting. Search by keyword or browse by industry sector.

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What is a NAICS Code?

A NAICS (North American Industry Classification System) code is a 6-digit number that classifies every business by its primary industry. The federal government uses NAICS codes to categorize contract opportunities, set small business size standards, and determine eligibility for set-aside programs like 8(a), HUBZone, and WOSB.

You need at least one NAICS code to register on SAM.gov, which is required for all federal contracting. Most contractors register with 5-15 NAICS codes to maximize eligible opportunities.

How to Choose Your NAICS Code

Start by searching for keywords that describe your primary business activity above. Look for codes where your company does the majority of its revenue. You can add additional codes for secondary services. The SBA uses your primary NAICS code to determine if you qualify as a small business based on revenue or employee thresholds.

Pro tip: Check what NAICS codes your competitors use on SAM.gov and review recent contract awards in your industry to find the most commonly used codes.

Frequently Asked Questions

How many NAICS codes can I register?

There's no limit. Most contractors register 5-15 codes on SAM.gov. Include your primary code plus any secondary services you can perform.

What's the difference between NAICS and SIC codes?

NAICS replaced SIC (Standard Industrial Classification) codes in 1997. NAICS is the current standard used by all federal agencies for procurement. Some state and local agencies still reference SIC codes.

Do NAICS codes affect my small business status?

Yes. Each NAICS code has its own SBA size standard (revenue threshold or employee count). Your business may qualify as small under one NAICS code but not another.

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