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ITA establishment size codes
The size column of the 300A file takes a code, not a headcount. It is based on the most employees who worked at the establishment at any point in the year.
Have the log open? Drop it in and get both ITA files with the errors repaired.
Open the converter| Code | Employees at the peak | Notes |
|---|---|---|
| 1 | Fewer than 20 | |
| 21 | 20 to 99 | Was part of code 2 before 2023. |
| 22 | 100 to 249 | Was part of code 2 before 2023. At 100 or more, Appendix B industries also file 300/301 data. |
| 3 | 250 or more |
Code 2 no longer works
OSHA split the old 20 to 249 category in 2023 so the ITA can tell which establishments have 100 or more employees. A CSV that still carries 2 fails. Change it to 21 or 22.
Who counts as an employee
Under 29 CFR 1904.41(b)(2), each individual employed in the establishment at any time during the calendar year counts as one employee, including full-time, part-time, seasonal and temporary workers.
The other two coded columns
| Column | Codes |
|---|---|
establishment_type | 1 not a government entity, 2 State Government entity, 3 Local Government entity |
no_injuries_illnesses | 1 the establishment had recordable injuries or illnesses, 2 it did not |
Short answers
What size code do I use for 150 employees in the OSHA ITA CSV?
22, which covers 100 to 249 employees.
Why does size code 2 fail in the ITA?
The 20 to 249 category was split in 2023 into 21 (20 to 99) and 22 (100 to 249).
Sources
- ITA CSV Documentation: Establishment and Form 300A data dictionary
- OSHA ITA Frequently Asked Questions
- 29 CFR 1904.41
Read on 2026-11-10. OSHA can change these documents; the link is the authority. Logmend is an independent information tool. It is not affiliated with or endorsed by OSHA or the U.S. Department of Labor, and it is not tax, legal or professional advice.