How NAICS Codes AffectSet-Aside Eligibility
The NAICS code assigned to a solicitation selects the SBA size standard used for that procurement. Program rules, affiliation, certification, and the solicitation still control eligibility.
Definition
NAICS codes influence set-aside eligibility because the code assigned to a solicitation selects the applicable SBA size standard. Meeting that standard is only one part of eligibility; affiliation, program-specific rules, certification where required, and the official solicitation also matter.
Key Takeaways
- Every government contract solicitation is assigned a NAICS code by the contracting officer, and that code determines which size standard applies.
- SBA size standards vary by NAICS code and are generally expressed as average annual receipts or average employee count.
- A business may be small under one NAICS code but not another; current SBA rules and affiliation calculations matter.
- WOSB set-asides are restricted to specific NAICS codes where the SBA has identified underrepresentation of women-owned businesses.
- The solicitation—not a vendor profile or this guide—controls the assigned code, representations, and eligibility requirements.
The Relationship: NAICS to Set-Aside
Understanding the chain from industry code to contract eligibility
NAICS Codes Define Industry
The North American Industry Classification System assigns a 6-digit code to every type of business activity. Each government solicitation is tagged with a NAICS code based on its principal purpose.
SBA Sets Size Standards
The SBA assigns a unique size standard to each NAICS code. These standards set the maximum annual revenue or employee count for a business to qualify as "small" in that industry.
Rules Determine Size
The business applies the corresponding size standard using current SBA rules, including applicable receipt, employee, and affiliation calculations.
The Solicitation Controls
A set-aside also has program, representation, certification, timing, and offer requirements. Meeting the numerical size standard alone does not establish eligibility.
Common NAICS Examples
Use the current SBA table or Size Standards Tool for the controlling standard; do not rely on a copied dollar or employee threshold.
| NAICS Code | Industry | Current Standard and Program Check |
|---|---|---|
| 541511 | Custom Computer Programming Services | Verify in the SBA Size Standards Tool and the solicitation. |
| 541330 | Engineering Services | Verify in the SBA Size Standards Tool and the solicitation. |
| 236220 | Commercial and Institutional Building Construction | Verify in the SBA Size Standards Tool and the solicitation. |
| 561210 | Facilities Support Services | Verify in the SBA Size Standards Tool and the solicitation. |
| 541519 | Other Computer Related Services | Verify in the SBA Size Standards Tool and the solicitation. |
| 238220 | Plumbing, Heating, and Air-Conditioning Contractors | Verify in the SBA Size Standards Tool and the solicitation. |
WOSB and EDWOSB competition is limited to SBA-designated NAICS codes. Verify current size rules at SBA.gov.
How to Check Your Set-Aside Eligibility
Use this as an orientation checklist, then verify the current SBA rules and the official solicitation
Identify your primary NAICS codes
Determine which 6-digit NAICS codes best describe the products or services your business provides. Use the Census Bureau NAICS search tool or the SBA size standards table for reference.
Read the solicitation
Confirm the assigned NAICS code, size standard, set-aside type, representation language, offer deadline, and any program-specific conditions in the current notice and amendments.
Use the current SBA standard
Open the SBA Size Standards Tool or current table for the assigned code. Standards and calculation rules can change, so avoid relying on an old copied threshold.
Apply the full size rules
Calculate receipts or employees using the current rule and include affiliates where required. Seek qualified advice when ownership, control, joint ventures, mergers, or recertification make the analysis complex.
Verify program eligibility
Check the current SBA record and program rules for 8(a), HUBZone, SDVOSB, WOSB, or EDWOSB status where the solicitation requires it. A NAICS listing alone is not a certification.
Keep official records current
Maintain accurate SAM.gov representations and any required SBA certification record, then follow the solicitation instructions. The contracting agency and SBA make official determinations.
Common Mistakes to Avoid
Common errors that can create eligibility, protest, or proposal risk
Choosing the Wrong NAICS Code
Do not select a preferred size standard in place of the code assigned by the solicitation. SBA provides a time-limited NAICS appeal process when an interested party believes the assigned code is incorrect.
Not Checking Size Standards
Do not assume a prior small-business representation controls a new procurement. Check the assigned code, current standard, affiliation rules, and any event that may trigger a new representation.
Assuming All Set-Asides Apply
WOSB and EDWOSB competitions use SBA-designated industries, while every program has its own rules. Verify the current certification record and solicitation instead of inferring eligibility from the business name or NAICS code.
Why This Matters for Contractors
The assigned NAICS code connects a procurement to its size standard and can affect which program rules apply. Reviewing it early helps a business avoid pursuing an opportunity under an incorrect size or certification assumption.
Treat eligibility as a current, procurement-specific verification task. Use the official solicitation, the SBA Size Standards Tool, the SBA certification record, and current regulations; this guide does not determine whether a business qualifies.
Related Resources
Explore tools and guides related to NAICS codes and set-aside programs
Set-Aside Programs Guide
Overview of 8(a), SDVOSB, WOSB, and HUBZone programs
Set-Aside Contracts
Browse active set-aside contract opportunities
Browse All Contracts
Search contracts and filter by NAICS code
Glossary
Look up NAICS, set-aside, and other contracting terms
SBA Size Standards
Official SBA size standards table by NAICS code
NAICS Search (Census)
Official NAICS code lookup tool
Frequently Asked Questions
Common questions about NAICS codes and set-aside eligibility
Can my NAICS code change which set-asides I qualify for?
The NAICS code assigned to a solicitation determines which SBA size standard applies to that procurement. Some programs, including WOSB and EDWOSB, also use an SBA-maintained list of eligible industries. Size and program eligibility depend on the current rules, the assigned code, affiliation, certification status where required, and the solicitation.
How many NAICS codes can a business have?
A SAM.gov entity record can list multiple NAICS codes that accurately describe the work a business performs. Listing a code does not by itself establish size, program eligibility, responsibility, or fitness for a particular solicitation.
Who assigns the NAICS code to a government contract?
The contracting officer assigns the NAICS code based on the principal purpose of the acquisition. SBA states that a NAICS-code appeal must be filed with its Office of Hearings and Appeals within 10 days of solicitation publication; review the current rules in 13 CFR 121.1102–121.1103 because timing and filing requirements are controlling.
What happens if my business grows past the size standard for my NAICS code?
Size is determined under the rules that apply to the procurement and can change after growth, affiliation, acquisition, or other events. Do not assume an existing representation controls a new offer. Recalculate using the current SBA standard and review any solicitation-specific representation or recertification requirement.
Are WOSB set-asides available for all NAICS codes?
No. SBA maintains a current list of industries eligible for WOSB or EDWOSB competition. The assigned NAICS code, the firm's SBA certification, and the solicitation all matter; do not infer eligibility from a general industry label.
Find Set-Aside Contracts Matching Your NAICS Codes
Search current federal opportunities by NAICS code and set-aside type, then verify eligibility and requirements in the official notice.