NAICS 541990 size standard: All Other Professional, Scientific and Technical Services
Sector 54—Professional, Scientific and Technical Services › Subsector 541—Professional, Scientific and Technical Services
$19.5 million
average annual receipts
A business whose primary industry is NAICS 541990 (All Other Professional, Scientific and Technical Services) is small for SBA and federal contracting purposes if its average annual receipts, including affiliates, are no more than $19.5 million.
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NAICS 541990 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 541990?
A business whose primary industry is NAICS 541990 (All Other Professional, Scientific and Technical Services) is small for SBA and federal contracting purposes if its average annual receipts, including affiliates, are no more than $19.5 million. The standard comes from SBA’s table at 13 CFR 121.201 (last amended effective March 17, 2023).
How are average annual receipts calculated?
Generally, total receipts over the most recently completed 5 fiscal years divided by 5, including affiliates (13 CFR 121.104). Firms in business for less than 5 years use a different calculation.
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 Professional, Scientific and Technical Services
541110 Offices of Lawyers ($15.5M) · 541191 Title Abstract and Settlement Offices ($19.5M) · 541199 All Other Legal Services ($20.5M) · 541211 Offices of Certified Public Accountants ($26.5M) · 541213 Tax Preparation Services ($25.0M) · 541214 Payroll Services ($39.0M) · 541219 Other Accounting Services ($25.0M) · 541310 Architectural Services ($12.5M) · 541320 Landscape Architectural Services ($9.0M) · 541330 Engineering Services ($25.5M) · 541340 Drafting Services ($9.0M) · 541350 Building Inspection Services ($11.5M)
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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