Injury Data

The following tables and charts are generated by L&I Research and Data Services staff. They show the numbers and costs of injuries for claims with various characteristics such as injury type, occupation, firm risk class and experience factor.

L&I and self-insured workers' compensation claims

2007-2024 — Claims filed:

• Year, Status, and Liability
• Year and Liability (Accepted status only)

L&I workers' compensation claims

Accepted status only. Excludes claims filed with self-insured employers.

2007-2024 - Claims accepted: Number of claims and incurred costs by:

• Accident Type
• Body Part Injured
• Injury Nature
• Injury Source
• Occupation
• Occupation and Accident Type
• Occupation and Injury Nature
• Occupation and Injury Source
• Most frequent injuries
• Risk Class

Experience factors, number of firms and claim frequencies

• By North American Industrial Classification System (NAICS) Code
• By Standard Industrial Classification (SIC) Code

Go to our Experience Factor Q/A document, to see questions and answers about these reports.

Caution: There are many differences between the data in these tables and data in the Bureau of Labor Statistics Information (BLSI) survey. Do not attempt to combine or compare this data.

Research reports

• Employer Assisted Injury Reporting - A report to the Legislature.
• Survey of Injured Workers: Claim Suppression and Direction of Care, June 2007.
• Employer Reporting Project Survey of Reasons for Delayed Reporting of Claims, Fall 2006.
• The Aging Workforce in Washington State: Impacts and Implications for Workers' Compensation, Second Edition, November 2007.
• Literature review, aging workforce, December 2005.
• 1997-1998 return-to-work study report - A report on the return-to-work success measures for 1997 to 1998.
• 1998-2000 return-to-work study report - A report on the return-to-work success measures for 1998 to 2000.