Professional, scientific, and technical services (NAICS 541): average TRIR and DART
These are the 2024 private-industry incidence rates from the U.S. Bureau of Labor Statistics, per 100 full-time-equivalent workers. Prequalification forms often ask whether your TRIR and DART are at or below these numbers.
Other recordable cases: 0.5. "Not published" means the data does not meet BLS publication guidelines.
What this means for your prequal form
Worked example: a company in this industry with 100,000 hours worked in a year (about 50 full-time employees) would match the industry average at 0.3 recordable cases. With 400,000 hours (about 200 employees) the figure is 1.4.
TRIR = recordable cases × 200,000 ÷ hours worked. DART = (days-away cases + restricted/transfer cases) × 200,000 ÷ hours worked. Use your OSHA 300A totals for each calendar year.
Parent industry: Professional, scientific, and technical services (NAICS 54), TRC 0.7, DART 0.2.
Detailed industries under NAICS 541
| NAICS | Industry | TRC | DART |
|---|---|---|---|
| 5411 | Legal services | 0.1 | 0.1 |
| 5412 | Accounting, tax preparation, bookkeeping, and payroll services | 0.2 | 0.1 |
| 5413 | Architectural, engineering, and related services | 0.6 | 0.3 |
| 5414 | Specialized design services | 0.2 | 0.0 |
| 5415 | Computer systems design and related services | 0.2 | 0.1 |
| 5416 | Management, scientific, and technical consulting services | 0.3 | 0.2 |
| 5417 | Scientific research and development services | 0.6 | 0.3 |
| 5418 | Advertising, public relations, and related services | 0.6 | 0.4 |
| 5419 | Other professional, scientific, and technical services | 5.6 | 1.2 |
Source: BLS Survey of Occupational Injuries and Illnesses, Table 1 (2024). NAICS 2017 codes as published by BLS.