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How to calculate TRIR and the DART rate
OSHA and the BLS use the same base: 200,000 hours, the hours 100 full-time employees work in a year. That base is what lets you compare your rate with the BLS average for your industry.
If you do not have the year's hours worked, the calculator estimates them as employees × hours per week × weeks worked. Use the hours on your Form 300A when you have them: BLS counts hours actually worked from payroll or time records, without vacation, holidays or other paid time off.
The 2024 BLS rates by industry
Total recordable cases, DART cases and days-away cases per 100 full-time workers in private industry, by sector and by manufacturing subsector, highest TRIR first.
By industry sector
| Industry (NAICS) | TRIR | DART | Days away |
|---|
| Transportation and warehousing‡ (48-49) | 4.4 | 3.5 | 2.1 |
| Agriculture, forestry, fishing and hunting* (11) | 3.9 | 2.5 | 1.4 |
| Arts, entertainment, and recreation (71) | 3.9 | 2.2 | 1.2 |
| Health care and social assistance (62) | 3.4 | 1.7 | 1.1 |
| Retail trade (44-45) | 3.0 | 1.8 | 1.0 |
| Manufacturing (31-33) | 2.7 | 1.7 | 0.8 |
| Accommodation and food services (72) | 2.6 | 1.2 | 0.8 |
| Construction (23) | 2.2 | 1.3 | 0.9 |
| Wholesale trade (42) | 2.2 | 1.6 | 0.9 |
| Utilities (22) | 1.9 | 1.2 | 0.8 |
| Other services (except public administration) (81) | 1.9 | 1.1 | 0.7 |
| Administrative and support and waste management and remediation services (56) | 1.8 | 1.2 | 0.8 |
| Educational services (61) | 1.7 | 0.8 | 0.6 |
| Real estate and rental and leasing (53) | 1.6 | 1.0 | 0.6 |
| Mining, quarrying, and oil and gas extraction† (21) | 1.2 | 0.9 | 0.7 |
| Information (51) | 0.7 | 0.4 | 0.3 |
| Professional, scientific, and technical services (54) | 0.7 | 0.2 | 0.2 |
| Management of companies and enterprises (55) | 0.5 | 0.3 | 0.2 |
| Finance and insurance (52) | 0.3 | 0.1 | n/a |
| All private industry | 2.3 | 1.4 | 0.8 |
Other industries
| Industry (NAICS) | TRIR | DART | Days away |
|---|
| Warehousing and storage (493) | 4.8 | 4.1 | 1.5 |
Manufacturing subsectors
| Industry (NAICS) | TRIR | DART | Days away |
|---|
| Wood product manufacturing (321) | 4.2 | 2.7 | 1.5 |
| Leather and allied product manufacturing (316) | 4.0 | 2.7 | 1.3 |
| Beverage and tobacco product manufacturing (312) | 3.7 | 2.6 | 1.2 |
| Furniture and related product manufacturing (337) | 3.5 | 2.1 | 1.1 |
| Food manufacturing (311) | 3.3 | 2.3 | 1.1 |
| Nonmetallic mineral product manufacturing (327) | 3.3 | 2.0 | 1.1 |
| Primary metal manufacturing (331) | 3.3 | 2.0 | 1.0 |
| Fabricated metal product manufacturing (332) | 3.2 | 1.8 | 0.9 |
| Transportation equipment manufacturing (336) | 3.2 | 2.1 | 0.9 |
| Plastics and rubber products manufacturing (326) | 2.8 | 1.8 | 0.9 |
| Textile mills (313) | 2.5 | 1.6 | 0.6 |
| Paper manufacturing (322) | 2.4 | 1.6 | 0.9 |
| Machinery manufacturing (333) | 2.3 | 1.3 | 0.7 |
| Textile product mills (314) | 2.1 | 1.3 | 0.7 |
| Electrical equipment, appliance, and component manufacturing (335) | 2.0 | 1.2 | 0.6 |
| Apparel manufacturing (315) | 1.9 | 1.2 | 0.8 |
| Miscellaneous manufacturing (339) | 1.7 | 0.9 | 0.4 |
| Printing and related support activities (323) | 1.6 | 1.0 | 0.6 |
| Chemical manufacturing (325) | 1.6 | 1.0 | 0.5 |
| Petroleum and coal products manufacturing (324) | 1.0 | 0.6 | 0.4 |
| Computer and electronic product manufacturing (334) | 0.9 | 0.5 | 0.3 |
| All private industry | 2.3 | 1.4 | 0.8 |
Source: Bureau of Labor Statistics, Survey of Occupational Injuries and Illnesses, Table 1, incidence rates by industry and case types, 2024 (published January 22, 2026). Rates per 100 full-time workers. * Excludes farms with fewer than 11 employees. † Mining data for coal, metal and nonmetal operators come from MSHA and do not reflect OSHA's 2002 recordkeeping changes, so they are not fully comparable with other industries. ‡ Rail transportation data come from the Federal Railroad Administration. n/a: the BLS did not publish the figure.
How to read your result
- Compare with your own industry. A TRIR of 3.0 is above the 2024 manufacturing average (2.7) and below the transportation and warehousing average (4.4). The comparison that means something uses your NAICS code.
- A small plant swings a lot. At 100 employees and 200,000 hours, each recordable case moves your TRIR by a full point. The BLS suggests looking at several years of cases and hours together before drawing conclusions.
- DART shows severity. TRIR counts every recordable case; the DART rate counts only those with days away, restricted work or job transfer. A DART rate that rises while TRIR stays flat means the cases are getting more serious.
- 29 CFR 1904.7 sets the recordability test. A work-related injury or illness is recordable if it results in death, days away from work, restricted work or transfer to another job, medical treatment beyond first aid, or loss of consciousness, or if it is a significant injury or illness diagnosed by a physician or other licensed health care professional.
Sources: OSHA recordkeeping rule, 29 CFR 1904.7; BLS, How to compute your firm's incidence rate; BLS rates for 2024, the most recent year published.
Every recordable that does not happen lowers your TRIR
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Frequently asked questions about TRIR
How do you calculate TRIR?
Multiply the number of OSHA recordable cases by 200,000 and divide by the total hours worked by all employees in the same period. With 6 recordable cases and 500,000 hours, the TRIR is 6 × 200,000 / 500,000 = 2.4 cases per 100 full-time employees.
What is a good TRIR?
One below the average for your industry and falling over time. In 2024 the BLS average was 2.3 for all private industry, 2.7 for manufacturing and 4.4 for transportation and warehousing. At a small plant a single case can move the rate by a full point, so look at the trend.
What is the DART rate?
It counts only the recordable cases with days away from work, restricted work or job transfer, per 100 full-time employees: DART cases × 200,000 / hours worked. On OSHA Form 300A, DART cases are column H plus column I. In 2024 the private industry DART rate was 1.4.
More questions
Why does the formula use 200,000 hours?
It is the hours 100 employees work in a year at 40 hours a week for 50 weeks. That base turns any plant's count into a rate per 100 full-time workers, so a plant of 80 people and one of 8,000 can be compared, and it is the base the BLS uses for its industry rates.
Which cases are recordable?
Under 29 CFR 1904.7, a work-related injury or illness is recordable if it results in death, days away from work, restricted work or transfer to another job, medical treatment beyond first aid, or loss of consciousness. A significant injury or illness diagnosed by a physician or other licensed health care professional is also recordable, even without those outcomes.
Where do the industry averages come from?
From the Bureau of Labor Statistics Survey of Occupational Injuries and Illnesses for 2024, Table 1, published on January 22, 2026: total recordable cases, DART cases and days-away cases per 100 full-time workers by industry, with NAICS codes.
Do you store the numbers I enter?
No. The calculator stores nothing in your browser and needs no sign-up. If you download the report, we receive your name, your email and the figures you entered, as the download form explains.
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