Your utility
How your utility treats power factor
We read each utility's published tariff. Some charge for low power factor, many charge only their largest customers, and some don't charge at all. Each page quotes the tariff and links the source.
Wisconsin
We Energies
Power-factor rule confirmed
Large primary-voltage customers have on-peak billed demand adjusted up or down around an 85% power factor. Secondary-voltage commercial schedules have no power-factor adjustment.
Wisconsin Public Service (WPS)
Power-factor rule confirmed
Large customers (over 1,000 kW) on schedule Cp pay a reactive demand adjustment when the average power factor is below 80%.
Alliant Energy (Wisconsin Power and Light)
Power-factor rule confirmed
As checked on 2026-10-03, Cp-2 transmission-voltage service has a reactive-energy charge or credit around 90% power factor. No power-factor provision was found in the reviewed Cp-1, Gd-1 and Cg-2 time-of-day schedules. WPL's General Rules were not checked.
Madison Gas and Electric (MGE)
Power-factor rule confirmed
Ordinary commercial and industrial customers have no power-factor charge. One transmission-voltage interruptible schedule adjusts billed demand if low power factor isn't corrected after notice.
Xcel Energy (Northern States Power – Wisconsin)
Partly confirmed
Larger time-of-day customers are billed on-peak demand scaled up when the average on-peak power factor is below 90%. The only copy of the rate book we could read online is from 2020, so current details need checking.
Sun Prairie Utilities
No power-factor charge found
No power-factor charge on any commercial schedule. Demand is billed in kW. There are 90% power-factor requirements for some equipment and for customer-owned generation.
Illinois
ComEd
No power-factor charge found
No power-factor, kVAR or kVA charge anywhere in ComEd's current delivery rate book. ComEd can require a customer with low power factor to correct it to at least 85% lagging.
Naperville Electric Utility
Partly confirmed
Naperville requires customers to keep power factor at 95–100%. A power factor/quality fee can apply under an individual written agreement, but its amount isn't published.
St. Charles Municipal Electric Utility
Power-factor rule confirmed
Demand-billed commercial customers with a metered power factor below 0.85 have their billing demand increased.
Indiana
NIPSCO
Power-factor rule confirmed
NIPSCO adjusts billing demand for power factor on its larger commercial and industrial rates: up below 80% and down above 90% on Rate 624, with other rules on specialized and very large rates.
Michigan
Consumers Energy
Power-factor rule confirmed
Demand-billed commercial and industrial customers pay a per-kVAR penalty below a 0.875 average power factor, and receive a matching credit above it.
Indiana Michigan Power (AEP)
Partly confirmed
In Michigan, I&M's Large General Service rate charges for excess kVA demand, and its Large Power rate charges or credits reactive demand. The rate book we read may since have been replaced, so figures need checking.
Iowa
Alliant Energy (Interstate Power and Light)
Power-factor rule confirmed
On Large General Service, demand charges rise once the power factor drops below 85%, with a bonus above 95%. Very large rates charge or credit per kVAR.
Minnesota
Rochester Public Utilities (RPU)
Power-factor rule confirmed
Customers of 25 kW and up have billing demand scaled up when the average power factor is below 0.95.
Tariffs checked 2026-10-03. Not sure which utility serves you? It's on your bill, or find your city.