Lag Time Stats: How Delayed Injury Reporting Drives Up Workers’ Compensation Costs
Lag time stats still show that one of the Six Keys – immediate reporting of injuries can cost an extra 400% in Workers Comp costs. Late reporting
Lag time, a simple but key concept in workers’ compensation, refers to how quickly an employer reports a workplace injury to their insurance carrier or third-party administrator (TPA). The longer it takes to report an injury, the more money an employer risks losing—both immediately and later. Research regularly shows that companies with extended lag times end up paying higher workers’ compensation premiums.
Lag time stats that show more than 48 hours to report a claim = higher costs. The claim is over in 48 hours.

Prompt injury reporting is a fundamental strategy for controlling workers’ comp expenses. When accidents are reported quickly, adjusters can set reserves accurately and manage claims more efficiently. These reserves directly influence the total incurred costs, which in turn affect the employer’s experience modification (mod) factor—a key driver of future premium rates.
A pattern of late reporting doesn’t just boost costs; it can damage an employer’s reputation with claims adjusters. For example, frequent “Twilight Zone” phone calls—where adjusters receive vague or eleventh-hour information—typically result in higher reserve allocations for that employer’s claims, further increasing costs.
Addressing lag time stats begins at the top. Senior management or business owners must give priority to and enforce immediate reporting of workplace injuries. Most insurers now offer web platforms for fast claim submission, making quick reporting easier than ever.
Speedy reporting also benefits employees, making sure they receive prompt medical attention for their injuries. Delays can jeopardize employee health and morale, and in some states—like California—employers must file a First Report of Injury within 24 hours of learning about an incident.
With today’s technology, there’s little justification for high lag time stats. By making fast reporting a standard practice, employers can better control costs, support their workforce, and stay in compliance with Workers Comp regulations.
