Total Recordable Incident Rate (TRIR)

Total Recordable Incident Rate (TRIR)

IR-01
ASPCSPFoundational

Formula
TRIR = (N × 200,000) ÷ EH
When to Use

Calculate OSHA total recordable injury/illness rate per 100 full-time workers. The most commonly reported lagging indicator.

Symbol Legend
SymbolMeaningUnitNote
TRIRTotal Recordable Incident RateCompare to BLS industry averages
NNumber of recordable injuries/illnesses
200,000Base hours for 100 FTE workers at 40 hrs/wk × 50 wkshoursFixed constant
EHTotal employee hours workedhours

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