NAICS 423810 size standard: Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers
Sector 42—Wholesale Trade › Subsector 423—Merchant Wholesalers, Durable Goods
250 employees
average number of employees
A business whose primary industry is NAICS 423810 (Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers) is small for SBA and federal contracting purposes if it has no more than 250 employees on average, including affiliates.
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NAICS 423810 on AwardWatchdog
Before you rely on this
- Affiliates count. SBA adds the receipts or employees of your affiliates (companies that control you, that you control, or that share common ownership or management) to yours. See 13 CFR 121.103.
- Receipts are a 5-year average. Average annual receipts are generally your total receipts over your last 5 completed fiscal years divided by 5 (13 CFR 121.104).
- Employees are a 24-month average. Employee-based standards use your average number of employees per pay period over the preceding 24 completed calendar months, counting part-time and temporary staff (13 CFR 121.106).
- The contract decides the code. For a federal contract, the contracting officer assigns one NAICS code in the solicitation, and that code’s size standard is the one that counts.
- Check officially. Use the official SBA Size Standards Tool and keep your SAM.gov registration current.
Not legal or professional advice. This is a free estimate from AwardWatchdog based on SBA’s published table. AwardWatchdog is not affiliated with SBA or the U.S. government. Only SBA can make a formal size determination.
Common questions
What is the SBA size standard for NAICS 423810?
A business whose primary industry is NAICS 423810 (Construction and Mining (except Oil Well) Machinery and Equipment Merchant Wholesalers) is small for SBA and federal contracting purposes if it has no more than 250 employees on average, including affiliates. The standard comes from SBA’s table at 13 CFR 121.201 (last amended effective March 17, 2023).
How are employees counted for NAICS 423810?
SBA averages the number of employees for each pay period over the preceding 24 completed calendar months, counting full-time, part-time and temporary employees, and includes affiliates (13 CFR 121.106).
Is this an official size determination?
No. This page is an estimate from AwardWatchdog based on SBA’s published table. Use the official SBA Size Standards Tool at sba.gov and only SBA can make a formal size determination.
Related codes in Merchant Wholesalers, Durable Goods
423110 Automobile and Other Motor Vehicle Merchant Wholesalers (250 employees) · 423120 Motor Vehicle Supplies and New Parts Merchant Wholesalers (200 employees) · 423130 Tire and Tube Merchant Wholesalers (200 employees) · 423140 Motor Vehicle Parts (Used) Merchant Wholesalers (125 employees) · 423210 Furniture Merchant Wholesalers (100 employees) · 423220 Home Furnishing Merchant Wholesalers (100 employees) · 423310 Lumber, Plywood, Millwork, and Wood Panel Merchant Wholesalers (150 employees) · 423320 Brick, Stone, and Related Construction Material Merchant Wholesalers (150 employees) · 423330 Roofing, Siding, and Insulation Material Merchant Wholesalers (225 employees) · 423390 Other Construction Material Merchant Wholesalers (100 employees) · 423410 Photographic Equipment and Supplies Merchant Wholesalers (200 employees) · 423420 Office Equipment Merchant Wholesalers (200 employees)
Source: 13 CFR 121.201 (SBA table of small business size standards, eCFR current as of October 15, 2026; last amended effective March 17, 2023). See also SBA’s table of size standards.
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