What Is Total Recordable Incident Rate (TRIR) in Construction? How to Calculate It and What Benchmark to Target

One number shows up on almost every prequalification form, bid package, and safety questionnaire a specialty contractor submits: TRIR. A low Total Recordable Incident Rate opens doors to projects, better insurance premiums, and owner confidence. A high TRIR gets bids rejected before anyone reads the scope of work. For construction contractors, understanding what TRIR measures, how to calculate it correctly, and what benchmark to aim for is not a safety department exercise. The number is a business development issue that affects which projects the company can pursue.

What TRIR measures

TRIR, or Total Recordable Incident Rate, is an OSHA-defined metric that tracks how frequently recordable workplace injuries and illnesses occur within a company, normalized per 100 full-time employees per year. The normalization is what makes the metric useful: a 15-person crew and a 500-person operation can be compared directly.

What counts as an OSHA recordable incident

Under 29 CFR Part 1904, a work-related injury or illness is recordable if it results in any of the following:

• Death

• Days away from work

• Restricted work or job transfer

• Medical treatment beyond first aid

• Loss of consciousness

• A significant diagnosis by a licensed healthcare professional

The boundary between first aid and medical treatment is where most recording disputes happen. Stitches are medical treatment. Butterfly bandages are first aid. Prescription medication is medical treatment. Over-the-counter medication at non-prescription strength is first aid. The full list of first aid treatments is defined in 29 CFR 1904.7, and it is worth reviewing when borderline cases arise.

How to calculate TRIR

The OSHA formula for TRIR is straightforward. The challenge is not the math but the accuracy of the inputs.

The TRIR calculation formula

TRIR = (Number of OSHA recordable incidents x 200,000) / Total hours worked by all employees

The 200,000 constant represents the total hours 100 full-time employees would work in a standard year (50 weeks x 40 hours x 100 employees). Using this constant normalizes the rate so companies of any size can be compared on the same scale.

A worked example

A specialty contractor logged 425,000 total hours worked across all employees in a year and had 4 recordable incidents during that period.

TRIR = (4 x 200,000) / 425,000 = 1.88

For every 100 full-time workers, the company experienced approximately 1.88 recordable incidents during the year.

What to include in total hours worked

Total hours worked should include all employees on the payroll, including overtime hours and temporary workers. Vacation hours, sick leave, holidays, and other leave time should not be included, since no work was performed and no exposure to workplace hazards occurred during those hours.

Accurate hour tracking matters. Contractors using ​field and labor tracking that captures actual hours worked by employee and project can pull total hours directly from their system, rather than estimating from headcount and assumed schedules.

What TRIR benchmark to target in construction

Context determines what "good" means. A TRIR of 2.0 in commercial construction may be acceptable, while the same rate in professional services would be alarming. Benchmarking against the industry average and against the specific requirements of the projects you pursue is the right approach.

Industry averages

According to data from the Bureau of Labor Statistics, the 2024 TRIR for construction was approximately 2.3 per 100 full-time equivalent workers, which matched the all-industry private-sector average. Specialty trade contractors tend to run slightly higher than general building contractors due to the nature of the work.

Prequalification thresholds

Many general contractors and project owners set their own TRIR thresholds for prequalification. Common thresholds range from 1.0 to 2.0 for construction. Some owner-operators on high-risk projects (refineries, data centers, critical infrastructure) require even lower rates. A TRIR above the GC's threshold often means the bid is rejected automatically, regardless of price or qualifications.

Prequalification platforms like ISNetworld, Avetta, and ComplyWorks typically require three to five years of TRIR data, so a single bad year can affect bidding eligibility for an extended period.

How TRIR connects to construction operations

TRIR is a lagging indicator, meaning it measures what already happened. Reducing it requires upstream changes to how work is planned, executed, documented, and reviewed.

Accurate incident classification

The most common way TRIR gets distorted is through inconsistent incident classification. A contractor who classifies borderline cases as first aid when they should be recorded is underreporting, which is both an OSHA violation and a liability risk. A contractor who over-records cases inflates the rate unnecessarily. Training field supervisors on OSHA's recordability criteria produces a consistent, defensible TRIR.

Daily shift documentation

Safety and labor tracking go together. Contractors whose foremen complete a ​daily shift report that includes safety observations, near-miss events, and work conditions create a record that supports both incident investigation and trend analysis. Spotting patterns in near-misses before they become recordables is how TRIR goes down over time.

Hours tracking accuracy

Since TRIR's denominator is total hours worked, inaccurate hour tracking skews the rate in both directions. Overstating hours makes the TRIR appear lower than it actually is. Understating hours inflates it. Using verified ​labor tracking data as the source of truth for both payroll and safety reporting ensures the TRIR calculation is based on actual exposure, not estimates.

Matching incident records to the correct period

A recordable incident that occurs in December but is not classified until January can fall into the wrong reporting year if records are not maintained carefully. Contractors should classify incidents at the time of occurrence, not at the time of medical evaluation. OSHA's recordkeeping requirements under 29 CFR 1904 specify that the log entry should be made within seven days of receiving information that a recordable case occurred.

How TRIR affects insurance and project eligibility

Beyond prequalification, TRIR data directly influences two financial outcomes for construction contractors: workers' compensation insurance premiums and project eligibility.

A contractor's Experience Modification Rate (EMR), which is set by the insurer based on claims history, correlates closely with TRIR trends. A rising TRIR usually foreshadows an EMR increase, which raises insurance costs across the entire operation. Reducing TRIR before the EMR adjustment period protects margins on every future project.

Project owners on high-value or high-risk work, including data centers, pharmaceutical facilities, and energy infrastructure, often impose TRIR ceilings that are stricter than standard prequalification platforms require. A contractor with a TRIR of 2.0 may pass ISNetworld screening but still be excluded from an owner's short list that caps at 1.5. Managing TRIR as a competitive advantage rather than a reporting obligation opens doors to higher-margin work.

Other safety metrics that work alongside TRIR

TRIR is not the only safety rate that matters for construction contractors. Looking at it alongside related metrics gives a more complete picture.

• DART (Days Away, Restricted, or Transferred): counts only the more severe recordable cases. The 2024 construction average was approximately 1.4.

• DAFW (Days Away From Work): counts only lost-time injuries. The 2024 construction average was approximately 0.8.

• EMR (Experience Modification Rate): set by the contractor's workers' compensation insurer based on claims history, and directly affects insurance premiums.

A contractor with a low TRIR but a high DART may have fewer total incidents but more severe ones, which tells a different story to project owners reviewing safety performance.

A contractor with a low TRIR but a high DART may have fewer total incidents but more severe ones, which tells a different story to project owners reviewing safety performance. Tracking all three metrics together gives the contractor a complete picture. A low TRIR with a high severity rate (measured by average days away per case) may indicate that while incidents are rare, the ones that do occur are serious, pointing to gaps in hazard controls for the highest-risk tasks.

Contractors using ​daily shift reports that capture near-miss observations alongside incident data can spot severity trends before they show up in the annual TRIR calculation. Near-miss frequency often predicts future recordable incidents, making it a leading indicator that complements TRIR's lagging measurement.

Track the hours and incidents that drive your TRIR

A defensible TRIR starts with accurate field data, both for hours worked and for incident documentation. Trayd's ​field and labor tracking captures actual hours by worker and project, and ​daily shift reports document the job conditions that feed safety analysis. Clean data produces a TRIR you can stand behind on every prequalification form. ​See how Trayd connects field data to your safety metrics.

Frequently Asked Questions

The questions below cover what construction contractors ask most about TRIR and safety rate calculations.

What does TRIR stand for?

TRIR stands for Total Recordable Incident Rate. The metric measures the number of OSHA-recordable injuries and illnesses per 100 full-time workers per year.

What is the TRIR formula?

TRIR = (Number of recordable incidents x 200,000) / Total hours worked. The 200,000 represents the hours 100 employees work in a standard year.

What is a good TRIR for construction?

The 2024 BLS average for construction was approximately 2.3. Many GCs set prequalification thresholds between 1.0 and 2.0. Below the industry average is generally considered acceptable.

Does TRIR include subcontractor hours and incidents?

No. Each company calculates its own TRIR based on its own employees' hours and recordable incidents. A GC's TRIR does not include subcontractor data.

How many years of TRIR data do prequalification platforms require?

Most platforms (ISNetworld, Avetta, ComplyWorks) require three to five years of TRIR, DART, and EMR data.

What is the difference between TRIR and DART?

TRIR counts all recordable incidents. DART counts only cases involving days away from work, restricted duty, or job transfer, which represent the more severe subset.