NAICS 541511 vs 541513
This page compares NAICS 541511 (Custom Computer Programming Services) vs NAICS 541513 (Computer Facilities Management Services) to help you determine the correct industry classification code.
Side-by-Side Comparison Asset
| Dimension | NAICS 541511 — Custom Computer Programming Services | NAICS 541513 — Computer Facilities Management Services |
|---|---|---|
| Definition | This U.S. industry comprises establishments primarily engaged in writing, modifying, testing, and supporting software to meet the needs of a particular customer. | This U.S. industry comprises establishments primarily engaged in providing on-site management and operation of clients' computer systems and/or data processing facilities. Establishments providing computer systems or data processing facilities support services are included in this industry. |
| SBA Size Standard | $34,000,000 | $37,000,000 |
| US Establishments (CBP) | 68,051 | 6,374 |
Decision Rule Guidelines
Select 541511 if your primary business focus aligns with Custom Computer Programming Services. Select 541513 if the establishment's core activities match the definition of Computer Facilities Management Services. Verify the revenue share of each activity if both apply.
Frequently Asked Questions (FAQ)
Can I report both NAICS 541511 and 541513 on a business tax return? ▾
No, the IRS requires declaring a single primary activity code (either 541511 or 541513) on Schedule C or Form 1120. You must audit your revenue share between these two classifications and select the code that represents the highest percentage of your receipts.
How do the SBA size standards differ between NAICS 541511 and 541513? ▾
NAICS 541511 has a standard of $34,000,000 while NAICS 541513 has a standard of $37,000,000. Ensure your rolling averages of annual receipts or employees do not exceed the specific code limit for your chosen classification.
Related Pages & Tools
- NAICS Code 541511 Directory — Official definition, SBA thresholds, and details.
- NAICS Code 541513 Directory — Official definition, SBA thresholds, and details.
- Find NAICS by Industry — Search classification directory.
Primary Ingestion Source
Data sourced from the U.S. Census Bureau NAICS 2022 Manual and SBA Small Business Size Regulations (13 CFR Part 121). Last verified on 2026-06-30.