DART Rate: Calculating DART the Easy Way (And Why It Matters)

When evaluating the effectiveness of your environmental, health, and safety (EHS) program, many companies focus on days away from work due to workplace injuries. But this metric only tells part of the story. To get a complete picture of how incidents impact operations, safety professionals turn to a more comprehensive OSHA metric: the DART rate.

Frequently Asked Questions

• What does DART stand for?
  

  • DART stands for Days Away, Restricted, or Transferred. It is an OSHA safety metric that captures workplace incidents resulting in an employee taking time away from work, being placed on restricted duties, or being transferred to a different job role.

• How is the DART rate calculated?

  • The DART Rate formula is: (Number of DART Incidents × 200,000) ÷ Total Employee Hours Worked. This normalizes the data so organizations of different sizes can be compared fairly.

• How does DART differ from TRIR?

  • TRIR counts all OSHA-recordable incidents, including minor ones requiring medical treatment beyond first aid. DART only counts incidents that result in days away, restricted work, or job transfer — making it a more focused measure of serious injury severity.

• Should DART always be lower than TRIR?

  • Yes. Because DART is a subset of TRIR (it only includes the most disruptive incidents), the DART rate should always be equal to or lower than the TRIR. If they are the same, it signals that every recordable incident is severely impacting operations.

• Why does OSHA use the DART rate for inspections?

  • OSHA uses DART data submitted through its electronic 300A filing (ITA) as part of its Site-Specific Targeting (SST) program to prioritize high-risk establishments for programmed inspections. A high DART rate can increase your likelihood of an OSHA visit.

• What is a good DART rate?

  • The Bureau of Labor Statistics reports an average DART rate of approximately 1.5 per 100 full-time workers in private industry. A lower rate than your industry average is ideal; however, the goal should always be continuous improvement over time.

Why DART Rate Is a Critical EHS Metric

Your organization may already be tracking recordable incidents and lost workdays, but DART goes further by accounting for indirect disruptions, like limited-duty assignments or temporary transfers.

This broader view helps:

• Identify hidden productivity losses
• Detect recurring safety issues
• Support proactive hazard mitigation
• Align leadership on safety priorities

For example, a worker returning to light-duty might not impact your “days away” metric, but the downstream effect on output, staffing, and morale can still be significant. DART helps quantify that.

How to Calculate Your DART Rate

To calculate your DART rate, use the following OSHA-approved formula:

DART Rate =
(Number of DART incidents × 200,000) ÷ Total employee hours worked

This calculation helps normalize data for companies of different sizes, making it easier to benchmark against industry standards.

DART Rate vs. TRIR: What’s the Difference?

The Total Recordable Incident Rate (TRIR) measures all OSHA-recordable incidents. The DART rate, by contrast, focuses only on those that lead to time away, restricted work, or job transfers.

In a healthy safety program, your TRIR should be higher than your DART rate. If they’re the same, it could indicate that every single recordable incident is disrupting operations, which should raise concern.

Streamlining DART Tracking with EHS Software

Manually calculating DART from OSHA Form 300 can be time-consuming and error-prone. That’s why many organizations are turning to EHS management software to automate the process.

Benefits of using EHS software for DART include:

• Simplified data collection through standardized digital forms
• Mobile access for real-time incident reporting from the field
• Automated DART rate calculations—no spreadsheet math required
• Immediate visibility into trends and spikes in incident severity

With EHS software, safety teams get accurate, real-time data to quickly act on emerging risks before they become systemic problems.

Why Tracking DART Rate Helps You Reduce Risk

Your DART rate isn’t just a number—it’s a powerful tool for driving continuous improvement in workplace safety. Monitoring this metric regularly helps leadership:

• Recognize underreported risks
• Allocate resources to high-risk areas
• Justify investments in safety improvements
• Demonstrate regulatory compliance

By integrating DART tracking into your broader EHS strategy, you’ll be better equipped to prevent incidents, boost performance, and protect your workforce.

Final Thoughts: Unlock Better Safety Insights with EHS Insight

At EHS Insight, our platform is built to help safety teams track, analyze, and act on key OSHA metrics like the DART rate. With real-time visibility and intuitive tools, we help you turn safety data into meaningful action—saving time, reducing risk, and improving outcomes.

Further reading: TRIR Calculation: How to Calculate Total Recordable Incident Rate