Calendar Days vs Workdays in OSHA Recordkeeping
OSHA counts calendar days, not workdays: every day the employee could not work or was restricted counts, weekends and holidays included.
4 min readUpdated
Topic · 5 guides
OSHA Incidence Rate Guides
Incidence rates turn your 300A into figures you can compare across years, sites and industries. OSHA and the Bureau of Labor Statistics use the same formula for every rate: the number of cases multiplied by 200,000, divided by the total hours worked by all employees. The 200,000 represents 100 employees working 40 hours a week for 50 weeks a year.
~4 min average readUpdated
What changes is the case count. The total recordable case rate, often called TRIR or TCIR, uses every case on the log (columns G, H, I and J). The DART rate uses cases with days away, restricted work or job transfer (columns H and I). The days-away (DAFW) rate uses column H alone. For 2024, BLS reported private-industry averages of 2.3 recordable cases and 1.4 DART cases per 100 full-time workers.
The denominators come from the 300A, which must show the annual average number of employees and the total hours worked by all employees covered by the log (29 CFR 1904.32(b)(2)). These guides show the math step by step, what belongs in hours worked, how to calculate average employees, and why OSHA counts calendar days rather than workdays.
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Incidence rates
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5 guides
Total Hours Worked on OSHA 300A: What to Include and What to Exclude
Enter the hours actually worked by all employees covered by the log, including overtime, and leave out paid vacation, holidays, sick leave…
4 min readUpdated
Annual Average Employees on OSHA 300A: How to Calculate the Field
Add up the number of employees paid in every pay period during the year, divide by the number of pay periods, and round up to the next whole number.
4 min readUpdated
How to Calculate OSHA TCIR and When the Number Misleads You
TCIR (also called TRIR) = total recordable cases × 200,000 ÷ total hours worked, where the cases are the sum of 300A columns G, H, I, and J.
4 min readUpdated
How to Calculate Your OSHA DART Rate Step by Step
DART rate = (number of 300A column H and I cases) × 200,000 ÷ total hours worked by all employees covered by the log.
4 min readUpdated
Recordability22
Electronic submission18
Forms 300, 300A & 30112
Work-relatedness12
Covered employees9
DART & day counts9
Deadlines9
Severe injury reporting8
Employee access7
Retention & updates7
Scope & exemptions6
Audits & quality5
Multiple establishments5
Privacy cases5
Software5
300A certification4
AI & terminology3
Filing FAQs1
Penalties1
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