Flower Mound and Highland Village households served by CoServ will pay more for electricity starting Dec. 1.

The Denton County-based cooperative is raising its monthly Customer Charge by $5 for most residential members, bringing the fixed fee from $15 to $20. It is CoServ's first base electric rate increase since 2001, according to the cooperative's rate notice.

The price per kilowatt hour is not changing. The increase applies only to the flat monthly charge that appears on every bill regardless of usage.

Four residential plans — Standard Residential, Summer Savings, Solar Savings and Reliability Plus — will all rise from $15 to $20. The Time-of-Use plan will go from $17 to $20, a $3 increase. Industrial customers will see demand charges rise by $0.84 per kilowatt.

What's driving the increase

CoServ said rising costs for labor, materials, equipment, technology and infrastructure made the adjustment necessary. For more than two decades, the cooperative managed those pressures through operational efficiencies and membership growth, according to the rate notice.

CoServ President and CEO Donnie Clary framed the increase as a reliability investment in a letter to members published Monday, Oct. 26. "Because CoServ is Member-owned, not shareholder-driven, this increase is not about profit," Clary wrote. "It is about ensuring we can continue delivering safe, reliable, and affordable energy for years to come."

The cooperative added more than 10,000 electric meters to its service area in 2026, Clary said. CoServ also plans to break ground on the first substation it will build, maintain and own itself, though the cooperative did not disclose the location, timeline or cost.

What members should know

On-bill notifications about the rate change began Oct. 1. CoServ scheduled a member meeting on the increase for Nov. 19 at 8 a.m. at CoServ Headquarters.

CoServ serves roughly 295,000 residential customers across 47 cities in North Texas, including both Flower Mound and Highland Village. The cooperative reports a 99.99% reliability score, though the methodology behind that figure was not detailed in the rate notice or Clary's letter.

Members with distributed generation, such as rooftop solar, will see their standard Customer Charge rise by the same amount, but their separate distributed generation charge will drop by $5, according to the rate notice.