In workers’ compensation, a small group of claims cost in excess of $1 billion each year. These “mega claims” represent less than 0.1% of total workers’ comp claims but account for over 2% of total loss dollars. And according to the National Council on Compensation Insurance (NCCI), these high-dollar claims are increasing in frequency across all industries.1
This increase may be due to a variety of factors that contribute to claim severity, from extended recovery times to new medical advances. Let’s look at the genesis of mega claims, what causes them, and how we can use technology to help contain them.
Workers’ compensation organizations generally classify mega claims as those with incurred losses between $2 million and $10 million or more. In a 2024 study of countrywide mega claims from accident years 2001-2021, NCCI defines mega claims as those with incurred losses of at least $2 million (at 2022 cost levels).2

That study, which included data from 43 states and the District of Columbia, found that since 2013, the estimated ultimate frequency of mega claims per 100,000 indemnity claims has been steadily increasing. A total of 11,330 mega claims from accident years 2001-2021 were reported as of Dec. 31, 2022 – which is approximately one out of every 1,295 reported indemnity claims. Of those, 53% were between $2 million and $3 million, 27% were between $3 million and $5 million, 15% were between $5 million and $10 million, and 4% were in excess of $10 million.3
Data from workers’ compensation carrier Safety National also shows an increase in mega claims. Over the last six years, claims with $2 million incurred increased by 91% and claims with $10 million incurred increased by 183%.4
While many factors influence claim costs, mega claims commonly have some or all of these characteristics:

According to the countrywide NCCI study, certain industries, injury types, and causes of injury incurred greater losses. For instance, construction, head and brain, and motor vehicle claims generated a disproportionate share of the most severe claims. A Travelers analysis of workers’ comp claims submitted from 2015 to 2024 confirms that construction claims were the most expensive – almost double the all-industries average.5
The construction industry has also experienced the largest increase in mega claim frequency – roughly twice that of manufacturing, stores and dealers, transportation, and all other industries.6
Additional findings from the NCCI study include:
Source: NCCI Countrywide Mega Claims Report 2011-20218
Beyond injury-specific factors, the NCCI study posited that mega claim costs could be influenced by the following9:
Resource-intensive care and lack of care coordination are also factors for high costs, as concluded by the Workers Compensation Research Institute in their study of high-cost claims.20 However, note that the study did not consider mega claims. For more information on this study, see Common Exceptions: The Rising Incidence of Complex Claims in Workers’ Compensation.
Mega claims can have a tremendous impact on workers’ compensation costs, and slightly more than half of workers’ comp stakeholders see complex/high-dollar claims as a major challenge.21
So how can we mitigate mega claims? One strategy is earlier identification, as mega claims are often not recognized for some time. For example, the NCCI study concluded that at 18 months from policy inception, less than 50% of mega claims reached $2 million or more in total incurred losses, and by 126 months from policy inception, only about 80% of mega claims reached $2 million.22
Sometimes these claims are easily identified due to obvious characteristics such as catastrophic injuries. But others are less obvious because the seriousness of the injury is not known immediately. In fact, according to one study, approximately two-thirds of all claims defined as large losses started out as “fairly routine,” with the most common reason for escalating costs being multiple failed surgeries.23
Predictive modeling can help by quickly identifying those claims with the potential to “creep up” and develop adversely. According to one source, using an early severity predictive model can double the identification of high-risk claims.24
Armed with insights, payers and/or their medical benefit management partners can also apply strategies that include:
Sometimes, such as when a catastrophic injury occurs, mega claims may be unavoidable. However, in other instances there is an opportunity to mitigate costs. By applying the above strategies early – before these claims reach a critical point – we can help contain mega claims and save the workers’ compensation system a whole lot of money.
