Safety Incident Rate Calculator
Determine your OSHA recordable incident rate (TRIR) by combining the number of cases and total hours worked. Use the result to benchmark safety programs across sites, industries, or reporting periods.
Follow OSHA guidelines for recordkeeping definitions.
Examples
- 3 incidents over 400,000 hours ⇒ 1.50 incidents per 100 workers (TRIR)
- 1 incident over 50,000 hours ⇒ 4.00 incidents per 100 workers (TRIR)
- 0 incidents over 200,000 hours ⇒ 0.00 incidents per 100 workers (TRIR)
FAQ
What does 200,000 represent?
It is the OSHA baseline hours for 100 full-time workers (40 hours per week × 50 weeks).
Are near-misses included?
No. Only OSHA recordable incidents count toward the total. Track near-misses separately for proactive mitigation.
Can hours be zero?
No. You must report a positive hour total or the rate cannot be computed.
Why use this rate?
The Total Recordable Incident Rate normalises safety performance so organisations of different sizes can compare results.
How can I benchmark the result?
Compare your rate with the Bureau of Labor Statistics (BLS) incidence tables for your NAICS industry to evaluate performance.
Should I track severity as well as frequency?
Yes. Pair this incident rate with severity metrics such as DART (Days Away, Restricted, or Transferred) for a fuller safety picture.
Additional Information
- OSHA uses 200,000 hours as the baseline (100 employees × 40 hours/week × 50 weeks).
- Track cases consistently: include days away, restricted duty, and medical treatment beyond first aid.
- Use the same reporting period for both incidents and hours (monthly, quarterly, or annually).
- Compare your TRIR against industry averages in the Bureau of Labor Statistics (BLS) Incident Rate tables.
- Pair TRIR with severity metrics such as DART (Days Away, Restricted, or Transferred) to capture both frequency and impact.