The William Blair/PCO Bookkeepers & M&A Specialists total U.S. Pest Index increased 13 percent year-over-year in March 2026, above the long-term average index growth rate of 10 percent.
“The Pest Index improved in March, following two months of below-average growth in January and February,” says William Blair Equity Researcher Tim Mulrooney. “There was one extra working day in March, but even adjusting for this, the index suggests that the pest market firmed up somewhat after a more difficult start to the year.”
On a sequential basis, the March Pest Index increased 18 percent month-over-month from February, which is stronger than the result in March 2025 (up 13 percent) and March 2024 (up 12 percent).
Dan Gordon, managing member of PCO Bookkeepers & M&A Specialists, adds, “With the March improvements primarily driven by stronger results in the residential and termite sectors, the Pest Index appears to be back on track after a cold winter.”
The month’s results by segment include:
- The Residential Pest Index increased 16 percent year-over-year.
- The Commercial Pest Index increased 8 percent year-over-year.
- The Termite Index increased 11 percent year-over-year.
- The Bed Bug Index was flat year-over-year.
- The Mosquito Index increased 6 percent year-over-year.
###
The William Blair/PCO Bookkeepers & M&A Specialists Pest Index tracks the monthly performance of 162 privately held pest control companies across 40 states with combined annual 2025 revenue of $646 million. The purpose of the report is to track the monthly performance of several U.S. pest markets. It does not include residential door-to-door companies. Learn more.
