Pest Index Increased 6 Percent YOY in May

The total U.S. William Blair/PCO Bookkeepers & M&A Specialists Pest Index increased 6 percent year-over-year in May 2025, down from 10 percent in April. The May result is below the long-term average index growth rate of 10 percent.

On a sequential basis, the index increased 2 percent from April, which is slightly below the normal seasonal trend. It is typically in the mid-single-digit growth range.

“After normalizing for one less workday in May, the pest index increased 10 percent to 11 percent year-over-year, says William Blair Equity Researcher Tim Mulrooney. “This is in line with the results in March and April on a workday-adjusted basis and in line with the long-term average.”

Dan Gordon, managing member of PCO Bookkeepers & M&A Specialists, adds, “The workday-adjusted results for May suggest the pest control industry is in line with where we were in March in April and remains on solid footing heading into the summer.”

The month’s results by segment include:

· The Residential Pest Index increased 7 percent year-over-year.
· The Commercial Pest Index increased 7 percent year-over-year.
· The Termite Index increased 3 percent year-over-year.
· The Bed Bug Index decreased 3 percent year-over-year.
· The Mosquito Index increased 2 percent year-over-year.