DART rate stands for Days Away, Restricted or Transferred rate. It is an OSHA measure of how many work-related injuries and illnesses caused days away from work, restricted duties or a job transfer, per 100 full-time workers over a year. It tracks the more serious recordable cases, so it is always equal to or lower than TRIR.
Multiply the number of DART cases by 200,000, then divide by the total hours worked by all employees in the same period. The 200,000 represents 100 full-time workers at 40 hours a week for 50 weeks. For example, 3 DART cases in 250,000 hours gives (3 x 200,000) / 250,000 = 2.4.
DART rate = (Number of DART cases x 200,000) / Total hours worked
Count a case once even if the worker had both days away and restricted duties. Use hours actually worked, not paid leave. The step-by-step example below shows the same calculation using the OSHA Form 300 log.
DART (Days Away, Restricted, or Transferred) cases are a subset of OSHA recordable incidents. While all DART cases are recordable incidents, not all recordable incidents are DART cases.
These include any work-related injuries and illnesses that result in:
Additionally, any injury or illness that requires medical treatment beyond first aid, or results in a significant injury or illness diagnosed by a healthcare professional, is also considered recordable.
These are a subset of recordable incidents and include:
Essentially, DART cases are the more severe cases that result in time away from work or changes in job duties.
While all DART cases are recordable incidents because they meet the criteria of requiring days away, restricted work, or job transfer, not all recordable incidents reach this level of severity. Some recordable incidents might involve medical treatment beyond first aid but do not result in time away from work or changes in job duties.
DART Rate = (Number of DART cases / Total hours worked) × 200,000
The DART rate is 2.4. That means 2.4 DART cases for every 100 full-time workers over a year.
DART rate (Days Away, Restricted, or Transferred rate) is an OSHA recordkeeping measure. It shows how many work-related injuries and illnesses led to days away from work, restricted duties or a job transfer for every 100 full-time workers in a year. The 200,000 in the formula equals 100 workers doing 40 hours a week for 50 weeks.
DART cases include incidents that result in days away from work, restricted work activity, or job transfer due to work-related injuries or illnesses.
DART is a subset of TRIR. While TRIR includes all recordable incidents, DART only includes the more severe cases that result in time away, restrictions, or transfers.
There's no single number. A good DART rate is one below the average for your industry, and lower is better. The US Bureau of Labor Statistics (BLS) publishes average DART rates by industry each year, using NAICS codes, in its Survey of Occupational Injuries and Illnesses. Find your NAICS code and compare your rate with the latest year's figure.
