Safety TRIR

Written by Priya Nair, Senior Content Editor Reviewed by Vikram Sen, Technical Reviewer Last updated: June 1, 2026 Last verified: June 1, 2026 · Methodology · Accuracy policy

A standard safety rate for contractors and owners. Confirm recordable definitions with OSHA/local rules—this tool is educational math only.

TRIR = (N × 200,000) ÷ total employee hours worked.

Tip: Keep “Recordable Incidents” and “Hours Worked” on the same basis (period, units, and population) before calculating Safety TRIR.

Cluster: Construction hub · SPI · CPI · Manufacturing hub · Percentage guide

TRIR (Total Recordable Incident Rate) annualizes recordable incidents per 100 full-time workers (200,000 hours).

Enter recordable incidents and total hours worked for the same period.

TRIR

Understanding Safety TRIR

How we calculate. TRIR = (N × 200,000) ÷ total employee hours worked. The form uses the same arithmetic as the worked examples on this page. See our methodology and accuracy policy.

Real-world scenario: A typical Safety TRIR case uses recordable incidents 3 and hours worked 400000. Enter the same figures below to reproduce the worked path.

What is Safety TRIR?

A standard safety rate for contractors and owners. Confirm recordable definitions with OSHA/local rules—this tool is educational math only.

Recordables per your safety policy
Hours = employee hours worked
Result is a rate, not a percent

The Formula

Total Recordable Incident Rate

TRIR = (Recordable incidents × 200,000) ÷ Hours worked

Worked Example

Scenario: 3 recordables; 400,000 hours worked.

Step 1: (3 × 200000) ÷ 400000 = 1.5

Answer: TRIR is 1.5.

Common Use Cases

Prequalification: contractor safety
Project dashboards: incident rate
Owner scorecards: site TRIR

Pro Tips

Align recordable criteria
Annualize carefully for short jobs
Not a substitute for legal reporting

Limitations: Safety TRIR results are educational construction planning aids—not engineering, safety, legal, or cost-estimating advice. Confirm definitions with your project controls, safety, and contract documents. For earned-value SPI/CPI see the Professional hub.

FAQ

Why 200,000?

It represents 100 employees × 40 hours × 50 weeks—the common U.S. TRIR scaling factor.

What if hours worked is 0?

TRIR is undefined—enter positive hours worked.

Authoritative References

For construction project controls and safety rate concepts, consult:

OSHA — workplace safety resources
PMI — project management practices
AIA — contract and project delivery context