12 Essential Steps to Find Your NAICS Code for Government Contracting Success in 2026

If you’re a small business owner looking to break into the $680+ billion federal contracting marketplace, understanding NAICS codes isn’t just helpful—it’s absolutely essential. The North American Industry Classification System serves as the backbone of government procurement, determining everything from which contract opportunities you’re eligible to pursue to whether your business qualifies as “small” under federal guidelines.

At FedBiz Access, we’ve spent over 25 years helping more than 25,000 businesses navigate the complexities of government contracting, resulting in over $36 billion in client awards. One of the most common questions we receive from new government contractors involves NAICS codes: What are they? How do I find mine? Why do they matter so much?

This comprehensive guide will walk you through everything you need to know about NAICS codes in 2026, including the latest updates to size standards, how to strategically select your codes for maximum visibility, and the critical role these six-digit numbers play in your government contracting success.

What Is a NAICS Code?

A NAICS code (pronounced “NAKES”) is a standardized six-digit classification number used to categorize businesses based on their primary economic activity. The North American Industry Classification System was developed jointly by the United States, Canada, and Mexico in 1997 to replace the older Standard Industrial Classification (SIC) system, creating a unified framework for analyzing and comparing business statistics across North America.

According to the U.S. Census Bureau, which manages the official NAICS database, these codes classify business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy. The system uses a hierarchical structure where each digit provides increasingly specific information about a business’s activities.

Understanding the NAICS Code Structure

The six digits of a NAICS code work together to precisely identify business activities:

1. First two digits — Identify the economic sector (20 major sectors exist)
2. Third digit — Identifies the subsector within that sector
3. Fourth digit — Identifies the industry group
4. Fifth digit — Identifies the NAICS industry
5. Sixth digit — Identifies the national industry (specific to U.S., Canada, or Mexico)

For example, NAICS code 541330 breaks down as follows:

• 54 — Professional, Scientific, and Technical Services sector
• 541 — Professional, Scientific, and Technical Services subsector
• 5413 — Architectural, Engineering, and Related Services industry group
• 54133 — Engineering Services NAICS industry
• 541330 — Engineering Services (U.S. national industry)

This structure ensures that businesses with similar production processes are grouped together, making it easier for government agencies to identify potential contractors and for businesses to find relevant opportunities.

Why NAICS Codes Matter for Government Contracting

For businesses pursuing federal contracts, NAICS codes serve multiple critical functions that directly impact your success in the government marketplace. Understanding these applications is essential for any company registered in SAM.gov or pursuing set-aside opportunities.

Determining Small Business Size Standards

Perhaps the most significant impact of NAICS codes for government contractors is their connection to Small Business Administration (SBA) size standards. The SBA assigns a specific size standard to each NAICS code, measured either by:

• Average annual receipts over the past five fiscal years (for most service industries)
• Average number of employees over the past 24 months (for manufacturing and some other industries)

These size standards determine whether your business qualifies as “small” for a particular contract opportunity. According to the Federal Acquisition Regulation (FAR), when contracting officers plan procurements, they assign a NAICS code to each opportunity, and your business must meet the size standard for that specific code to compete for small business set-aside contracts.

For example, under the proposed SBA size standard updates for FY2026:

• NAICS 541310 (Architectural Services) would increase from $12.5 million to $16 million
• NAICS 541330 (Engineering Services) would increase from $25.5 million to $29 million
• NAICS 541380 (Testing Laboratories and Services) would increase from $19 million to $23.5 million

Contract Opportunity Identification

Government contracting officers use NAICS codes to classify every federal solicitation. Your business only appears in searches when your registered NAICS codes match the opportunity’s assigned codes. This means strategic NAICS code selection directly affects:

• Which contract opportunities appear in your searches
• Your competitive positioning in the federal marketplace
• Whether you qualify for small business programs and certifications
• Your visibility to prime contractors seeking subcontracting partners

Set-Aside Program Eligibility

Programs like 8(a) Business Development, HUBZone, SDVOSB, and WOSB all have NAICS-specific requirements. Your certification eligibility and the contracts you can pursue depend on meeting size standards for specific NAICS codes.

GSA Schedule Classification

Many government-wide purchasing programs, including the GSA Multiple Award Schedule (MAS), categorize vendors based on their NAICS codes. Each Special Item Number (SIN) on the GSA Schedule maps to one or more NAICS codes, making proper classification essential for schedule holders.

12 Steps to Find and Register Your NAICS Code

Finding the right NAICS code for your business requires a systematic approach. Follow these twelve steps to identify and register your codes properly:

Step 1: Assess Your Primary Business Activity

Before searching for NAICS codes, you need a clear understanding of your business’s primary economic activity. Ask yourself:

• What are the primary products or services your business offers?
• What activity generates the most revenue for your establishment?
• What processes does your business use to deliver its offerings?

The Census Bureau assigns NAICS codes based on the primary activity that generates the most revenue for a business establishment. This self-assessment forms the foundation for finding accurate codes.

Step 2: Visit the Official Census Bureau NAICS Database

The U.S. Census Bureau’s NAICS website serves as the authoritative source for all NAICS code information. From this official portal, you can:

• Search for codes using keywords related to your business
• Browse the complete NAICS structure by sector
• Download reference files and the official NAICS manual
• Access the most current 2022 NAICS codes

Step 3: Use the NAICS Search Tool

Enter keywords describing your business activities into the Census Bureau’s search tool. Keep these tips in mind:

• Start with broad terms, then narrow down
• Try multiple variations of your business description
• Search for the products you sell AND the services you provide
• If results are too specific, use broader industry terms

Step 4: Review Industry Descriptions Carefully

Once you identify potential codes, read the full industry description for each one. The official NAICS Manual includes:

• Narrative descriptions of what activities the industry includes
• Cross-references to related industries
• Illustrative examples of businesses within the category
• Exclusions explaining what activities belong elsewhere

Ensure your primary business activity aligns with the description before selecting a code.

Step 5: Select Your Primary NAICS Code

Your primary NAICS code should represent your main line of business—the activity that generates the highest percentage of revenue. This is crucial because:

• Your primary code determines your default small business size standard
• SAM.gov requires designation of one primary NAICS code
• Tax returns should reflect the same primary NAICS code as your SAM registration

According to the SBA, they typically accept your self-assigned primary NAICS code but reserve the right to challenge it. Make sure you can justify your selection based on actual business activities and revenue.

Step 6: Identify Secondary NAICS Codes

Most businesses qualify for multiple NAICS codes if they offer diverse products or services. The Dynamic Small Business Search (DSBS)—now called Small Business Search (SBS)—allows businesses to register multiple codes to maximize visibility.

Best practices for secondary codes:

• Include at least 3-5 secondary NAICS codes reflecting other business activities
• Select codes that accurately represent services you can genuinely perform
• Consider codes where you maintain small business status as you grow
• Research which codes government buyers commonly use in your industry

Step 7: Verify Size Standards for Each Code

Before finalizing your NAICS code selections, verify the size standard for each code using:

• SBA’s Table of Size Standards
• SBA’s Size Standards Tool
• Title 13 Part 121.201 of the Code of Federal Regulations

Ensure your business qualifies as “small” under each NAICS code you plan to register, particularly for codes you’ll use in set-aside competitions.

Step 8: Research Government Spending in Your NAICS Codes

Cross-reference your selected codes against actual government contract data to validate your choices:

• Use USASpending.gov to see how much agencies spend in your NAICS categories
• Check FPDS.gov to see which NAICS codes appear in contracts similar to what you’d pursue
• Review past solicitations on SAM.gov for your industry

This real-world data shows how agencies actually classify work and helps you position strategically.

Step 9: Register in SAM.gov

With your NAICS codes identified, complete your SAM.gov registration. The NAICS code section is found under “Core Data” in your entity registration. Key requirements:

• Designate one primary NAICS code
• Add all relevant secondary NAICS codes
• Ensure consistency with your other business records

Your NAICS assignment communicates your firm’s industry focus to the system, guiding potential contracting opportunities your way.

Step 10: Optimize Your SBS/DSBS Profile

Update your Small Business Search profile with accurate NAICS codes, keywords, and capability narratives. Contracting officers and prime contractors use SBS to find small businesses for upcoming opportunities. Your optimization should include:

• All relevant NAICS codes
• Keywords that match how buyers search
• Clear capability descriptions
• Current certifications and set-aside statuses

Step 11: Align Your Marketing Materials

Ensure your capability statement and other marketing materials reference your registered NAICS codes. Contracting officers verify that vendors’ capabilities match their stated classifications, so consistency across all federal touchpoints is essential.

Step 12: Monitor for NAICS Updates

NAICS codes are updated every five years by the Office of Management and Budget. The current codes (2022 NAICS) will be reviewed for potential updates in 2027. Additionally, SBA periodically adjusts size standards. Stay informed about changes that could affect your eligibility by:

• Following SBA announcements
• Subscribing to Federal Register notices
• Working with government contracting specialists who monitor regulatory changes

2026 NAICS Code Updates and Size Standard Changes

The federal contracting landscape continues to evolve, with significant changes affecting NAICS codes and size standards in 2026.

Proposed SBA Size Standard Increases

On August 22, 2025, the SBA published a proposed rule to increase monetary-based size standards across 263 industries. Key highlights include:

• No decreases proposed — All changes represent increases to current thresholds
• Inflation adjustment — Changes account for market shifts and inflation since the last review
• Industry-specific increases — Some NAICS codes see significant threshold jumps

Notable proposed increases include:

NAICS Code	Industry	Current Standard	Proposed Standard
541310	Architectural Services	$12.5 million	$16 million
541330	Engineering Services	$25.5 million	$29 million
541380	Testing Labs	$19 million	$23.5 million
561110	Office Administrative Services	$12.5 million	$15.5 million
561510	Travel Agencies	$25 million	$33.5 million
561730	Landscaping Services	$9.5 million	$13 million

These increases could allow businesses near their current size limits to extend their small business status, potentially qualifying for more set-aside opportunities.

FAR Threshold Adjustments (October 2025)

Effective October 1, 2025, the Federal Acquisition Regulation implemented significant dollar threshold increases that work alongside NAICS codes:

• Micro-Purchase Threshold: $10,000 → $15,000
• Simplified Acquisition Threshold: $250,000 → $350,000
• Subcontracting Plan Threshold: $750,000 → $900,000

These changes create more opportunities in “simplified” procurement lanes where small businesses often have advantages.

Upcoming 2027 NAICS Revision

The next scheduled review of NAICS codes for potential revision is 2027. The Office of Management and Budget will solicit public comments regarding changes through a Federal Register notice. During the public comment period, suggestions for new and emerging industries can be submitted.

Common NAICS Code Selection Mistakes to Avoid

Strategic NAICS code selection requires avoiding common pitfalls that can limit your government contracting success:

Selecting Codes Where You’re Not Small

Choosing NAICS codes where your business exceeds size standards disqualifies you from small business set-asides in those categories. Always verify size standards before registering codes, particularly for your primary NAICS.

Missing Relevant Secondary Codes

Many businesses register only their primary code, missing opportunities in related categories. Government buyers search by NAICS, so missing codes means missing visibility for certain procurements.

Inconsistent Classifications

Your NAICS codes should be consistent across:

• SAM.gov registration
• Tax returns
• State business registrations
• Capability statements
• Proposals

Inconsistencies can raise red flags during contract award reviews or certification applications.

Outdated Codes

NAICS codes change with each five-year revision. Using outdated codes may cause your business to appear in fewer searches or create compliance issues. Verify your codes against the current 2022 NAICS structure.

Overly Narrow Selection

Selecting only highly specific six-digit codes can limit visibility. Consider including both specific codes and broader industry group codes where appropriate to your capabilities.

How FedBiz Access Can Help

Navigating NAICS codes and federal contracting requirements can be complex, but you don’t have to do it alone. With over 23 years of experience, FedBiz Access has helped thousands of businesses successfully position themselves in the government marketplace.

Our comprehensive services include:

• SAM Registration and Optimization — We ensure your registration is complete, accurate, and optimized with the right NAICS codes
• DSBS/SBS Optimization — Strategic profile enhancement for maximum visibility to government buyers
• Certification Assistance — Support for 8(a), HUBZone, WOSB, SDVOSB, and other set-aside certifications
• Market Intelligence — Our FedBiz365 platform provides insights into buyers, competitors, and opportunities
• GSA Schedule Support — Proposal preparation and contract management

Ready to optimize your government contracting foundation? Schedule a complimentary consultation with a FedBiz Specialist today, or call us at (844) 628-8914.

Frequently Asked Questions About NAICS Codes

What is a NAICS code and do I need one?

A NAICS code is a six-digit number that classifies businesses by their primary economic activity. If you want to pursue government contracts, you absolutely need NAICS codes. They’re required for SAM.gov registration and determine your eligibility for small business set-aside contracts. Even businesses not pursuing government work benefit from NAICS codes for tax purposes, market research, and accessing SBA programs.

How do I find my company’s NAICS code?

Start by visiting the U.S. Census Bureau’s NAICS website and using their search tool to enter keywords describing your primary business activity. Review the industry descriptions for potential matches to ensure alignment with your operations. You can also contact the Census Bureau at 1-888-756-2427 for assistance, or work with government contracting specialists like FedBiz Access who can help identify optimal codes for your business.

Can I have multiple NAICS codes?

Yes, businesses can and should register multiple NAICS codes if they offer diverse products or services. While you must designate one primary NAICS code, SAM.gov allows you to add multiple secondary codes. This increases your visibility across different procurement categories. However, you should only register codes for activities your business genuinely performs and where you meet applicable size standards.

What’s the difference between NAICS codes and SIC codes?

NAICS (North American Industry Classification System) replaced the SIC (Standard Industrial Classification) system in 1997. NAICS provides more detailed categories, better reflects the modern service economy, and standardizes classifications across the U.S., Canada, and Mexico. While some government agencies and databases still reference SIC codes, NAICS is the current standard for federal contracting and most business classifications.

How often do NAICS codes change?

NAICS codes are reviewed and potentially revised every five years by the Office of Management and Budget. The current version is 2022 NAICS, with the next revision scheduled for 2027. Size standards associated with NAICS codes are also reviewed periodically by the SBA. Businesses should monitor these updates to ensure their registrations remain current and their eligibility status hasn’t changed.

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The 20 Major NAICS Sectors Explained

Understanding the broad structure of NAICS helps you navigate the system more effectively. Here are the 20 major economic sectors and their two-digit codes:

1. 11 — Agriculture, Forestry, Fishing and Hunting: Crop production, animal production, forestry, logging, fishing, and hunting operations
2. 21 — Mining, Quarrying, and Oil and Gas Extraction: Extraction of naturally occurring minerals, oil, and gas
3. 22 — Utilities: Electric power generation, natural gas distribution, water supply, and sewage treatment
4. 23 — Construction: Building construction, heavy and civil engineering, specialty trades
5. 31-33 — Manufacturing: Transformation of materials into new products (food, textiles, chemicals, machinery, electronics, transportation equipment)
6. 42 — Wholesale Trade: Selling merchandise to retailers, contractors, and commercial users
7. 44-45 — Retail Trade: Selling merchandise to the general public
8. 48-49 — Transportation and Warehousing: Air, rail, water, truck, and pipeline transportation; warehousing and storage
9. 51 — Information: Publishing, broadcasting, telecommunications, data processing
10. 52 — Finance and Insurance: Banking, securities, insurance carriers and agencies
11. 53 — Real Estate and Rental and Leasing: Real estate sales and rentals, equipment leasing
12. 54 — Professional, Scientific, and Technical Services: Legal, accounting, architectural, engineering, computer services, consulting
13. 55 — Management of Companies and Enterprises: Holding companies and corporate headquarters
14. 56 — Administrative and Support and Waste Management: Office administration, facilities support, security, janitorial, landscaping, waste management
15. 61 — Educational Services: Schools, colleges, training centers
16. 62 — Health Care and Social Assistance: Hospitals, medical offices, nursing facilities, social assistance programs
17. 71 — Arts, Entertainment, and Recreation: Performing arts, sports, museums, amusement parks
18. 72 — Accommodation and Food Services: Hotels, restaurants, bars, catering
19. 81 — Other Services: Repair and maintenance, personal care, religious organizations, advocacy groups
20. 92 — Public Administration: Government agencies (note: most public administration is excluded from economic census)

For government contractors, the most common sectors include 23 (Construction), 54 (Professional Services), 56 (Administrative and Support Services), 48-49 (Transportation), and 31-33 (Manufacturing).

Strategic NAICS Code Selection for Maximum Government Contract Visibility

Beyond simply finding accurate codes, strategic NAICS selection can significantly impact your federal contracting success. Here’s how to approach code selection strategically:

Balancing Accuracy with Opportunity

Your NAICS codes must genuinely represent your capabilities—misrepresentation can lead to contract issues or certification problems. However, within the bounds of accuracy, you can optimize your selections:

• Primary Code Strategy: Choose a primary NAICS where you maintain small business status AND where significant government spending occurs
• Growth Consideration: Select codes where your size standard gives you room to grow without losing small business status
• Competition Analysis: Research how many competitors are registered under potential codes

Researching Government Spending by NAICS

Smart contractors research actual government spending before finalizing NAICS selections. Use these free resources:

• USASpending.gov: Track federal spending by NAICS code
• FPDS.gov: View detailed contract data including NAICS codes assigned
• SAM.gov Contract Opportunities: See how current solicitations are classified

For example, if you’re an IT services company, you might discover that NAICS 541512 (Computer Systems Design Services) sees more federal spending than NAICS 541511 (Custom Computer Programming Services), influencing your primary code selection.

Industry-Specific NAICS Considerations

Different industries have unique NAICS considerations:

Construction: The SBA sets construction size standards by specific construction type. NAICS 236220 (Commercial and Institutional Building Construction) has different standards than 237310 (Highway, Street, and Bridge Construction). Verify which construction codes match your actual project types.

IT Services: Technology companies often qualify under multiple codes including 541512 (Computer Systems Design), 541511 (Custom Programming), 541513 (Computer Facilities Management), and 541519 (Other Computer Related Services). Strategic selection affects which opportunities you see.

Professional Services: Consulting firms might fit under 541611 (Administrative Management Consulting), 541612 (Human Resources Consulting), 541618 (Other Management Consulting), or industry-specific consulting codes.

Manufacturing: With over 300 manufacturing NAICS codes, precise classification matters. Products manufactured determine your code, and employee-based size standards vary significantly by industry.

NAICS Codes and Small Business Certifications

Your NAICS codes directly impact eligibility for small business certification programs. Here’s how they interact:

8(a) Business Development Program

The SBA’s 8(a) program requires applicants to qualify as small under their primary NAICS code. Program participants must:

• Demonstrate small business status under their primary NAICS
• Show economic disadvantage through personal financial statements
• Meet size standards for any contracts they pursue

When applying for 8(a) certification, your primary NAICS code selection affects initial eligibility and ongoing contract opportunities.

HUBZone Certification

HUBZone-certified businesses must qualify as small under their primary NAICS. The program provides:

• Competitive and sole-source contract opportunities
• 10% price evaluation preference in full and open competition
• Access to the federal government’s 3% HUBZone contracting goal

Women-Owned Small Business (WOSB) Program

WOSB certification requires meeting size standards for all NAICS codes where you seek set-aside contracts. The SBA maintains a list of NAICS codes eligible for WOSB set-asides based on underrepresentation studies.

Veteran-Owned Small Business (VOSB/SDVOSB)

The VA’s Veteran-Owned certification programs tie directly to NAICS-based size standards. Certified businesses can pursue set-asides and sole-source opportunities in their verified NAICS categories.

How Contracting Officers Use NAICS Codes

Understanding how government buyers use NAICS codes helps you position your business effectively:

Procurement Classification

When contracting officers plan acquisitions, they must assign a NAICS code that best describes the principal purpose of the procurement. According to FAR 19.102, primary consideration is given to:

• Industry descriptions in the U.S. NAICS Manual
• Product or service descriptions in the solicitation
• Relative value and importance of requirement components
• Function of goods or services being purchased

A procurement is usually classified according to the component that accounts for the greatest percentage of contract value.

Small Business Set-Aside Determination

Once a NAICS code is assigned, the contracting officer applies the corresponding SBA size standard to determine if the procurement should be set aside for small businesses. If two or more responsible small businesses can perform the work at fair market prices, set-aside is typically required.

Vendor Searches

Contracting officers and prime contractors use the Small Business Search (formerly DSBS) to find potential vendors. They search by:

• NAICS codes matching their procurement needs
• Keywords related to required capabilities
• Set-aside certifications (8(a), HUBZone, WOSB, SDVOSB)
• Geographic location

Your NAICS codes must match what buyers search to appear in their results.

NAICS Code Appeals

If you believe a contracting officer assigned the wrong NAICS code to a solicitation, you can appeal to SBA’s Office of Hearings and Appeals (OHA). Appeals must be filed within 10 calendar days after solicitation issuance. A successful appeal could change your eligibility for the opportunity.

Maintaining Compliance: NAICS Codes in Ongoing Contract Performance

NAICS compliance doesn’t end with registration—it continues throughout contract performance:

Annual SAM.gov Renewal

Your SAM registration requires annual renewal. During renewal:

• Review and update NAICS codes as your business evolves
• Verify size standards haven’t changed
• Update certifications and representations

An expired registration immediately disqualifies you from receiving new contract awards and can cause payment delays on existing contracts.

Size Re-certification

For contracts exceeding one year, you may need to re-certify your size status. The SBA determines size as of the date you represent that you’re small, typically when submitting your initial offer including price.

Business Growth Considerations

As your business grows, monitor whether you’re approaching size standard thresholds. Strategies for managing growth include:

• Tracking average receipts or employee counts against NAICS thresholds
• Planning for “graduation” from small business status in specific categories
• Adjusting primary NAICS if growth affects one code more than others
• Considering mentor-protégé arrangements before exceeding size standards

Industry Resources for NAICS Code Research

Beyond the Census Bureau, several resources support NAICS research:

Official Government Resources

• U.S. Census Bureau NAICS: Official NAICS codes, definitions, and crosswalks
• SBA Size Standards: Complete table of size standards by NAICS
• Bureau of Labor Statistics: Industry employment and wage data by NAICS
• GSA.gov: GSA Schedule NAICS to SIN mapping

SBA District Offices and PTAC

Your local SBA District Office and Procurement Technical Assistance Centers (PTACs) provide free counseling on NAICS code selection and government contracting requirements. These resources can help you:

• Identify appropriate NAICS codes
• Understand size standard calculations
• Navigate certification requirements
• Prepare for federal contracting

Professional Assistance

For businesses serious about government contracting, professional assistance from firms like FedBiz Access provides:

• Expert NAICS code analysis and selection
• Registration optimization
• Ongoing compliance monitoring
• Strategic positioning for maximum visibility

Take the Next Step Toward Government Contracting Success

Understanding and strategically selecting your NAICS codes is fundamental to success in the federal marketplace. These six-digit numbers affect every aspect of government contracting, from your small business eligibility to which opportunities you can pursue.

The government contracting landscape offers tremendous opportunities for prepared businesses. With proper NAICS code selection, optimized registrations, and strategic positioning, your business can tap into the $680+ billion federal marketplace effectively.

Don’t leave your NAICS code selection to chance. The experts at FedBiz Access have helped over 25,000 businesses establish strong foundations for government contracting success. Whether you need help with your initial SAM registration, optimizing your existing profiles, or navigating certification programs, our team is ready to assist.

Call (844) 628-8914 today or schedule your free consultation to discuss how we can help position your business for government contracting success in 2026 and beyond.

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FedBiz Access is a leading full-service federal business development firm specializing in B2G and B2B government opportunities. With over 25 years of experience, we’ve helped businesses nationwide secure over $36 billion in government awards. Contact us to learn how we can help your business succeed in the government marketplace.