π¦Ί TRIR Safety Calculator
Your OSHA recordable incident rate, standardized.
Total recordable incident rate
Estimates for planning only, not financial advice.
Three recordable incidents across 450,000 hours worked is a TRIR of 1.33. That means 1.33 incidents per 100 full-time workers per year, better than the US private-industry average of roughly 2.4. One number, comparable across companies of any size.
How to Use This Calculator
Enter the number of OSHA-recordable incidents in the period and the total hours worked by all employees (including temporary and part-time). The calculator annualizes to the standard 100-worker base.
Count recordables: deaths, days-away cases, job transfers, and injuries needing treatment beyond first aid.
Total all hours worked from payroll, not headcount estimates. Part-time and temp hours count.
Compare against your industry's BLS rate and your own trend, never against unrelated industries.
The Formula
The 200,000-hour base standardizes everything to 100 full-time-equivalent workers per year, which is why a 50-person shop and a 5,000-person plant can compare rates directly. It is incidents per 100 FTE-years, not a percentage. OSHA recordkeeping rules (29 CFR 1904) define exactly what counts; when in doubt, the rulebook, not gut feel, decides.
Worked Example
3 incidents, 450,000 hours. TRIR: 3 x 200,000 / 450,000 = 600,000 / 450,000 = 1.33. FTEs: 450,000 / 2,000 = 225 workers. So 3 incidents among 225 worker-years = 1.33 per 100. Against a private-industry average near 2.4, this site runs about 45 percent safer than average. One more incident would push it to 1.78, still below average: small numbers swing fast, which is why TRIR needs multi-year trends.
What Counts as Recordable
| Recordable | Not recordable |
|---|---|
| Deaths, days away, restricted duty | First aid only (bandages, ice) |
| Stitches, prescription meds | Observation without treatment |
| Diagnosed occupational illness | Common colds and flu |
| Needlesticks with contamination | Injuries during horseplay (in some cases) |
The first-aid versus medical-treatment line is where most disputes live. OSHA publishes a specific first-aid list; anything beyond it, including a single suture or a prescription-strength drug, is recordable. Misclassification, usually undercounting, is among the most cited recordkeeping violations.
Benchmarks and Bidding
TRIR is a commercial number, not just a safety number. Many large owners and general contractors prequalify subcontractors on TRIR: above 3.0 can disqualify you from bids regardless of price. Insurance experience modifiers move with incident rates, so a high TRIR raises workers' comp premiums for years. The business case for safety spending is usually made right here: a 1-point TRIR improvement can cut premium costs by multiples of the safety program's budget.
Gaming and Limitations
TRIR's weakness is that it measures reporting as much as safety. Aggressive "case management" that keeps injuries just under recordability, underreporting by fearful workers, and excluding temp-agency hours all flatter the number. That is why sophisticated safety programs track leading indicators too: near-miss reports, training completion, audit scores. A TRIR of 0.5 with zero near-miss reports is more suspicious than a TRIR of 2.0 with a healthy reporting culture. Trust the trend and the culture behind it, not the decimal.
TRIR and Your Insurance Bill
The experience modification rate (EMR or mod) translates your incident history into premium dollars. A mod of 1.0 is average; 0.8 means you pay 20 percent less than the industry average, 1.2 means 20 percent more. The mod formula weights claim frequency heavily, which is exactly what TRIR measures, so a falling TRIR usually drags the mod down with a one to two year lag. For a contractor with a $500,000 workers' comp premium, moving the mod from 1.15 to 0.95 saves $100,000 a year, every year for three years.
This is the business case that funds safety programs. Price the program (a full-time safety manager, training, equipment) against the premium savings plus avoided indirect costs, which OSHA estimates at 2 to 4 times the direct claim costs. Most companies find the safety budget pays for itself in premium alone before counting a single avoided injury. Present TRIR alongside the mod in every budget review: it turns safety from a cost center into a profit lever.
TRIR Is a Lagging Indicator: Lead It
Total recordable incident rate measures injuries per 100 workers per year, and like all lagging indicators it tells you where you have been. World-class safety programs manage the leading indicators instead: near-miss reporting rates, safety-observation counts, training completion, hazard-closure times. Companies that drive near-miss reporting up reliably drive TRIR down, because every reported near-miss is an incident prevented.
The financial stakes go beyond workers' comp. Experience modification rates tie insurance premiums directly to TRIR history: a 1.2 EMR versus a 0.8 EMR can mean hundreds of thousands in extra premiums for a mid-size contractor, and many bids require EMR below 1.0 just to qualify. Underreporting to game the number backfires catastrophically in audits and lawsuits. Report honestly, investigate every recordable for root causes, and let the calculator track a number that keeps falling for the right reasons.
Estimates for planning only, not financial advice.
Frequently Asked Questions
What is TRIR?
Total Recordable Incident Rate: OSHA-recordable incidents x 200,000 / total hours worked. It expresses incidents per 100 full-time workers per year, letting companies of any size compare safety performance on one scale. It is the standard safety KPI in construction, manufacturing, and oil and gas, and often a bid prequalification requirement.
How do you calculate TRIR?
Multiply recordable incidents by 200,000 and divide by total hours worked. With 3 incidents and 450,000 hours: 3 x 200,000 / 450,000 = 1.33. The 200,000 represents 100 workers at 2,000 hours each per year. Use payroll hours, not headcount estimates: part-time and temp hours count, and guessing understates the denominator.
What is a good TRIR?
Below 1.0 is world-class; the US private-industry average sits around 2.4. Construction averages higher, around 2.5-3. Compare within your industry via Bureau of Labor Statistics rates, and weight your multi-year trend over any single year. Small companies should be extra careful with single-year rates: one incident in 50,000 hours is a TRIR of 4.0, pure noise.
What counts as an OSHA recordable incident?
Work-related deaths, days away from work, job transfer or restriction, and injuries/illnesses needing treatment beyond first aid (stitches, prescriptions, etc.). First-aid-only cases like bandages and ice are not recordable. The first-aid versus medical-treatment boundary is where most disputes live: one suture or one prescription makes a case recordable.
What is the difference between TRIR and LTIR?
TRIR counts all recordables; LTIR (lost time incident rate) counts only cases with days away from work. TRIR is broader and the standard bid-qualification metric; LTIR isolates the severe cases. Track both. A falling TRIR with a flat LTIR means you are trimming minor injuries while severe ones persist, a pattern worth investigating.
Why do clients ask for TRIR in bids?
Large owners use it to prequalify contractors: high TRIR signals safety risk and potential project disruption. Many set hard cutoffs around 2.0-3.0. A good TRIR is literally worth contracts. On major industrial projects, the safety prequalification can eliminate half the bidders before price is ever discussed.
How does TRIR affect insurance costs?
Workers' comp premiums follow the experience modification rate, which moves with claim frequency and severity. Fewer recordables mean a lower mod and lower premiums for three years running. Safety spending often pays for itself in premium savings. A contractor with a $500,000 premium moving its mod from 1.15 to 0.95 saves $100,000 a year for three years.
Can TRIR be manipulated?
Yes, and it is: underreporting, aggressive case management to stay under recordability, and excluding temp hours all flatter it. That is why mature programs pair TRIR with leading indicators like near-miss reporting rates and audit scores. A TRIR of 0.5 with zero near-miss reports is more suspicious than 2.0 with a healthy reporting culture.
Do part-time and temp hours count?
Yes. Total hours worked includes all employees: full-time, part-time, seasonal, and temporary workers under your supervision. Using headcount instead of hours is the most common calculation error. Pull the hours from payroll records; estimating from headcount times 2,000 understates overtime-heavy workforces and inflates the rate.
Is TRIR the same as OSHA rate?
Essentially. 'OSHA incident rate' usually means TRIR computed per the 200,000-hour base. The DART rate (days away, restricted, transferred) is the related narrower metric OSHA also tracks. OSHA uses DART for some enforcement targeting, so a site with low TRIR but high DART can still attract inspections.