TRIR Definition | Total Recordable Incident Rate Formula

TRIR: Total Recordable Incident Rate Formula, Calculation & Benchmarks

TRIR, or Total Recordable Incident Rate, measures the number of OSHA recordable workplace incidents per 100 full-time workers during a defined period. It is calculated with recordable incidents, total hours worked, and the 200,000-hour normalization constant used for safety benchmarking.

Last updated 2026-05-01

What Is TRIR?

TRIR stands for Total Recordable Incident Rate. It is a standardised measure of workplace safety performance used by OSHA, industry regulators, and organisations worldwide to compare safety performance across companies, sites, and time periods.

A 'recordable incident' under OSHA includes any work-related injury or illness that results in: medical treatment beyond first aid; days away from work; restricted work or job transfer; loss of consciousness; or diagnosis of a significant injury/illness by a healthcare professional.

TRIR Formula

TRIR = (Number of OSHA Recordable Incidents × 200,000) ÷ Total Hours Worked

The constant 200,000 represents the hours worked by 100 full-time employees over 50 weeks (100 employees × 40 hours/week × 50 weeks = 200,000 hours). This normalisation allows fair comparison between organisations of different sizes.

TRIR Calculation Example

A manufacturing facility with 500 employees records 12 OSHA recordable incidents in a year. Total hours worked: 500 × 2,000 hours = 1,000,000 hours.

TRIR = (12 × 200,000) ÷ 1,000,000 = 2,400,000 ÷ 1,000,000 = 2.4

This facility has a TRIR of 2.4, meaning 2.4 recordable incidents per 100 full-time workers per year.

What Is a Good TRIR? Industry Benchmarks

Industry	Average TRIR (BLS 2024)	World-Class Target TRIR
Construction	2.5 – 3.5	< 1.0
Manufacturing	2.0 – 3.0	< 1.0
Oil & Gas	0.5 – 1.2	< 0.5
Logistics / Warehousing	3.5 – 5.0	< 2.0
Healthcare	3.5 – 4.5	< 2.0
All Industries (average)	2.3	< 1.5

TRIR vs LTIR vs DART Rate: What's the Difference?

Metric	What It Measures	Formula Constant
TRIR	All recordable incidents (broadest measure)	× 200,000
LTIR (Lost Time Injury Rate)	Incidents resulting in days away from work	× 200,000
DART Rate	Days Away, Restricted, or Transferred cases	× 200,000
TRIFR (Australia)	Total Recordable Injury Frequency Rate	× 1,000,000

How to Reduce Your TRIR

Implement proactive hazard identification — near miss reporting, job hazard analyses, safety observations
Deploy AI-powered monitoring to detect unsafe behaviours and conditions before incidents occur
Conduct thorough root cause analysis for every incident — and act on findings
Build a strong safety culture — leadership visibility, worker engagement, blame-free reporting
Benchmark against industry peers and set annual TRIR reduction targets

Frequently asked questions

Is a lower TRIR always better?

Yes — a lower TRIR means fewer recordable incidents per 100 workers. A TRIR of 0 is the theoretical ideal (zero incidents). However, organisations with very low TRIRs should also verify they are reporting all recordable incidents correctly, as under-reporting can artificially deflate the metric.

How often should TRIR be calculated?

TRIR is typically calculated annually for OSHA reporting (OSHA Form 300A). However, many organisations track TRIR monthly or quarterly to identify trends and take corrective action more quickly.

Does a near miss affect TRIR?

No — near misses are not OSHA recordable events and do not affect TRIR. However, near miss tracking is one of the most effective strategies for reducing TRIR over time by identifying and correcting hazards before they cause recordable incidents.