How to Calculate TRIR — Formula & Benchmarks

Here’s the formula you came for: TRIR = (number of OSHA recordable incidents × 200,000) ÷ total hours worked. That single number — your Total Recordable Incident Rate — is what general contractors, owners, and insurers check first when they size up your safety program. It compresses a year of work into one figure, normalized so a 40-person crew can be compared fairly against a 4,000-person firm. This guide walks through how to calculate TRIR, what counts as a recordable, what a good rate looks like in construction, and how to move the number without gaming it.

What is TRIR?

TRIR — the Total Recordable Incident Rate, sometimes called the total recordable case rate or simply the OSHA incident rate — measures how many recordable injuries and illnesses your company logs per 100 full-time workers per year. The 200,000 in the formula is where that “per 100 workers” comes from: 100 employees × 40 hours × 50 weeks = 200,000 hours.

That normalization is the whole point. Raw injury counts would always make big companies look worse and tiny ones look spotless. Dividing by hours worked puts everyone on the same scale, which is exactly why prequalification platforms, insurers, and owner scorecards ask for it.

What counts as an OSHA recordable?

Under OSHA’s recordkeeping rule (29 CFR 1904), an injury or illness is recordable if it’s work-related and results in any of the following:

• Death
• Days away from work
• Restricted work or transfer to another job
• Medical treatment beyond first aid
• Loss of consciousness
• A significant injury or illness diagnosed by a physician or other licensed health care professional

The line that trips people up most is first aid. A cut cleaned and bandaged on site is first aid and isn’t recordable; the same cut closed with stitches is medical treatment and is. Every recordable belongs on your OSHA 300 log — which is where you’ll count from when it’s time to calculate your rate.

How to calculate TRIR, step by step

The math is simple once your inputs are clean:

1. Count your recordables. Pull the total number of recordable cases from your OSHA 300 log for the period.
2. Total your hours worked. Add up actual hours worked by all employees from payroll — not scheduled hours, and don’t count vacation, holiday, or sick time.
3. Run the formula. Multiply recordables by 200,000, then divide by total hours worked.

Worked example: your crew logs 4 recordable injuries across 500,000 hours worked in a year. (4 × 200,000) ÷ 500,000 = 1.6. That’s your TRIR.

Common TRIR calculation mistakes

• Counting first-aid-only cases. If it didn’t meet the recordability test, it doesn’t belong in the numerator.
• Using scheduled hours instead of actual hours. Overtime counts; PTO doesn’t. Pull the real numbers from payroll.
• Forgetting temporary and seasonal labor. Their hours count toward your total, and often their injuries do too.
• Reading small-company rates without context. On 50,000 hours, a single recordable produces a TRIR of 4.0. For small crews, always cite the rate alongside the hours behind it.

What is a good TRIR in construction?

The honest benchmark comes from the Bureau of Labor Statistics, which publishes recordable case rates by industry every year. Construction has recently run in the low-to-mid 2s per 100 full-time workers — so a TRIR below that industry figure is competitive, below 1.0 is genuinely strong, and a legitimate zero (with real hours and honest reporting behind it) is elite.

Check the current BLS release when you benchmark; the industry average moves year to year. And remember the prequalification angle: many GCs and owners screen at or below the industry average, and some set a hard cap. Your TRIR isn’t just an internal health check — it’s a gate.

TRIR vs. LTIR, DART, and EMR

TRIR is the headline, but it’s not the only rate you’ll be asked for. Here’s how the common construction safety metrics relate:

LTIR — Lost Time Injury Rate

LTIR counts only the cases that kept someone away from work: (lost-time cases × 200,000) ÷ hours worked. It’s a subset of TRIR that isolates your most serious injuries. What is a lost time injury? It’s a work-related injury that keeps the worker off the job beyond the day it happened — a case with days away from work, not just a bandage and back to it.

DART — Days Away, Restricted, or Transferred

DART widens LTIR to include restricted-duty and job-transfer cases: (DART cases × 200,000) ÷ hours worked. It sits between LTIR and TRIR, and it’s OSHA’s preferred way to gauge how many of your injuries were serious enough to change what a worker could do.

EMR — Experience Modification Rate

EMR is the odd one out: it’s an insurance multiplier built from claim dollars, not a rate built from case counts. Where TRIR asks “how many,” EMR asks “how much did it cost, and what does that predict.” Insurers price it; GCs check it alongside your TRIR.

The hierarchy is easy to hold onto: every DART case is a recordable, and every lost-time case is a DART case — so TRIR contains DART, and DART contains LTIR. EMR then prices what all three of them count.

Leading vs. lagging safety indicators

TRIR, LTIR, DART, and EMR share one limitation: they’re all lagging indicators. They count what already went wrong. By the time your TRIR moves, the injury has happened, the claim is open, and the quarter is over. You can report lagging indicators, but you can’t manage next month with them.

Leading indicators are the ones you can act on before anyone gets hurt. They measure the safety activity that prevents incidents in the first place:

Leading indicators worth tracking on a construction site

• Near-miss reports filed — the closer you look, the more you catch. See what a near miss is and how to report one.
• Inspection completion rate — are the walks actually happening, on schedule?
• Toolbox-talk participation — is the crew engaged, or is it a signature sheet?
• Corrective-action closure time — how long a known hazard stays open before it’s fixed.
• Observation and JHA rates — how consistently high-risk work gets planned before it starts.
• Training and certification currency — the share of your crew qualified for the work in front of them.

The discipline is to pair every lagging metric you report up the chain with a leading metric you manage down on the ground.

How to reduce TRIR (without gaming the number)

Let’s name the temptation first. You can lower your TRIR by under-recording — classifying recordables as first aid, discouraging reports, sending injured workers to “rest” instead of a clinic. It moves the number. It does nothing about the risk, and it exposes you to OSHA recordkeeping citations and prequalification fraud if a GC ever audits. Don’t. A clean low rate is an asset; a fake one is a liability with a fuse on it.

The levers that actually lower risk — and eventually the rate — are these:

• Make reporting frictionless at the scene, so nothing gets lost or quietly buried.
• Investigate to root cause, not to blame, so the fix addresses the condition instead of the person.
• Close corrective actions fast and visibly, so known hazards don’t wait around for a second chance.
• Plan high-energy work with JHAs and pre-task planning before the crew starts.
• Onboard and micro-train for the trades and languages actually on your site.
• Watch your leading indicators weekly, not at year-end when the rate is already set.

This is where the right software earns its keep. Capture incidents at the scene, keep your OSHA 300 and 300A logs current automatically, and see your TRIR and DART live by site and by trade instead of reconstructing them in a spreadsheet each December. That’s what SALUS incident management and reporting are built to do.

Construction safety metrics for your dashboard

TRIR is one gauge on the panel. A complete construction safety scorecard — the one an executive team should see — pairs the lagging outcomes with the leading activity, each on its own cadence:

• TRIR and DART — monthly, on a trailing-12-month basis
• EMR — annually, at renewal
• Near-miss-to-incident ratio — weekly
• Inspection completion — weekly
• Corrective-action closure time — weekly
• Training and certification currency — monthly

The value isn’t any single number — it’s seeing them together, per site and rolled up across the company, on one pane.