What Is Power Factor Correction for Business Electricity?

Picture a restaurant owner in Houston opening her monthly utility statement and staring at a demand charge line item she cannot explain. Her equipment list has not changed, her hours are the same, but that charge creeps upward every summer. A technician eventually tells her the culprit is a low power factor caused by her walk-in cooler compressors and HVAC units running simultaneously.

That scenario plays out in warehouses in Ohio, office parks in Pennsylvania, retail strips in New Jersey, law firms in Washington DC, and manufacturing floors in Massachusetts every billing cycle. Power factor is not a concept reserved for electrical engineers. For any business that pays demand charges, it is a line on the bill waiting to be managed.

Power factor is a number between zero and one (or zero and 100 percent) that expresses how efficiently a building uses the electricity it draws from the grid. A power factor of 1.0, sometimes called unity, means every amp pulled from the utility is doing useful work. A power factor of 0.70 means roughly 30 percent of the current flowing through the wiring is not contributing to real, productive work.

Electricians describe this in terms of two types of power. Real power (measured in kilowatts, or kW) does the actual work: spinning motors, lighting spaces, running computers. Reactive power (measured in kilovars, or kVAR) is the portion that charges and discharges the magnetic fields inside inductive equipment like motors, transformers, and fluorescent ballasts. The combination of real and reactive power is called apparent power, measured in kilovolt-amperes (kVA). Power factor is simply real power divided by apparent power.

A low power factor means the utility must deliver more apparent power than the building actually converts into useful work. That extra current stresses transformers, conductors, and generation assets.

Most power factor problems in commercial and industrial settings trace back to inductive loads. Common sources include:

HVAC compressors and motors. Central air systems, refrigeration units, and pump motors all create inductive loads. The larger the motor, the more reactive power it typically demands.

Fluorescent and HID lighting with magnetic ballasts. Older lighting systems are among the most frequent contributors. LED replacements with quality drivers often improve power factor noticeably.

Variable frequency drives (VFDs) and older uninterruptible power supplies (UPS). Unless they include built-in power factor correction, these devices can introduce harmonic distortion that further degrades power factor.

Welding equipment and large transformers. Common in light manufacturing and auto service shops.

The problem is often worst during peak production or peak cooling hours, which is exactly when utilities measure the 15-minute interval demand charge that appears on commercial bills.

In the six deregulated markets ElectricRates.org covers, the delivery of electricity remains with the local regulated utility even when a business has shopped for a competitive supplier. That means power factor penalties live on the delivery side of the bill, not the supply side.

Each utility sets its own threshold. Once a commercial account's measured power factor falls below that threshold (commonly in the 0.85 to 0.95 range, though this varies by utility and tariff), the utility may apply one of several billing adjustments:

Billing on kVA instead of kW. Some utilities size demand charges on apparent power rather than real power. A business with a low power factor will see a higher kVA figure and therefore a higher demand charge.

A direct power factor penalty rider. Other tariffs add a separate charge per kVAR of reactive power consumed beyond a threshold.

An adjusted demand calculation. Some tariffs multiply the measured kW demand by a correction multiplier when power factor falls short.

Business owners shopping for a competitive supply rate in Texas (where the PUCT oversees the market), Ohio (PUCO), Pennsylvania (PA PUC), Massachusetts (MA DPU), New Jersey (NJBPU), or Washington DC (DC PSC) should note that competitive supply rates address the energy charge, not the delivery structure. Power factor fees are a utility tariff issue and exist regardless of which supplier a business chooses.

Power factor correction is the process of adding equipment or making operational changes that reduce reactive power demand, bringing power factor closer to unity. The goal is to supply reactive power locally, at the point of use, so the utility does not have to deliver it from the grid.

Capacitor banks are the most common correction method. Capacitors generate reactive power locally, offsetting the reactive demand of inductive loads. They can be installed at individual motor control centers, at a main distribution panel, or at the service entrance depending on the facility's needs.

Automatic power factor correction (APFC) panels use sensors and switching relays to connect or disconnect capacitor banks in real time as the load profile changes. This is practical for facilities with variable loads.

Synchronous condensers and active filters address more complex harmonic distortion problems but are typically reserved for larger industrial operations.

Operational changes also matter. Replacing older magnetic ballasts with LED drivers, right-sizing motors so they run closer to full load, and staggering equipment startup times to avoid simultaneous inrush currents all contribute to a healthier power factor without adding capacitor equipment.

The correction itself is an electrical infrastructure investment. A qualified licensed electrician or energy engineer should assess the facility's load profile before specifying equipment.

Demand charges are the part of a commercial electricity bill that reflects peak consumption, measured in kilowatts (or kVA, depending on the tariff) over a 15-minute interval. They can account for a significant portion of a commercial bill, especially for businesses with equipment that cycles on and off unpredictably.

When a utility bills on kVA rather than kW, correcting power factor from, say, 0.80 to 0.95 directly reduces the apparent power figure the utility measures, which directly reduces the demand charge line item. That is why power factor correction often has a faster payback period than other energy efficiency projects: it reduces the demand charge every single billing cycle without changing how the business operates.

Businesses in Ohio on certain commercial tariffs, for example, may find that their local utility (AEP Ohio, Duke Energy Ohio, FirstEnergy, or Dayton Power and Light, all regulated by the PUCO) has specific power factor clauses in their tariff schedules. The same is true for PECO, PPL, or Duquesne Light customers in Pennsylvania (regulated by the PA PUC), Eversource or National Grid customers in Massachusetts (regulated by the MA DPU), PSE&G or JCP&L customers in New Jersey (regulated by the NJBPU), Pepco customers in Washington DC (regulated by the DC PSC), and Oncor, CenterPoint, or AEP Texas customers in Texas (regulated by the PUCT). Reading the applicable tariff schedule, available from the utility or the state commission, is the only way to know exactly how power factor is billed for a specific account.

A business does not need to hire a consultant immediately to start understanding its power factor situation.

1. Pull the last 12 months of utility bills. Look for a line labeled "demand charge," "kVA demand," "reactive demand," or a power factor rider. If the bill includes both a kW demand and a kVA demand figure, divide kW by kVA. That ratio is the measured power factor.

2. Request interval data from the utility. Most regulated utilities in these six markets provide 15-minute interval data on request or through an online portal. This shows when peak demand occurs and by how much it exceeds average load.

3. Inventory inductive loads. Walk the facility and list motors, compressors, HVAC units, and older lighting systems. Equipment nameplates often list power factor ratings.

4. Get a power quality survey. A licensed electrician with a power quality analyzer can measure actual power factor at the service entrance and at individual panels, identifying where correction will have the most impact.

5. Compare supply rates while addressing delivery costs. Power factor correction reduces delivery charges. Shopping for a better supply rate in a deregulated state reduces the energy component. Both levers work independently, and comparing business electricity rates on ElectricRates.org takes only a few minutes.

In states where electricity supply is regulated and businesses have no supplier choice, the utility controls everything and rate structures are standardized. In Texas, Ohio, Pennsylvania, Massachusetts, New Jersey, and Washington DC, businesses can shop for competitive supply rates. That freedom is valuable, but it can also create a blind spot: a business that aggressively shops supply but ignores power factor may be leaving meaningful savings on the delivery side untouched.

In Texas, the competitive retail electric provider (REP) handles supply, but Oncor or CenterPoint handles delivery and sets the demand charge methodology. In Pennsylvania, a business might be on a competitive supplier's rate but still pay PPL's tariffed demand charges if power factor falls short. The terminology for default supply differs by state: Texas has the Price to Compare, Ohio has the Standard Service Offer (SSO), Pennsylvania has Price to Compare as well, Massachusetts has Basic Service, New Jersey has Basic Generation Service (BGS), and Washington DC has Standard Offer Service (SOS). None of those terms have anything to do with power factor, which is a delivery-side issue in all six markets.

The businesses that control their electricity costs most effectively treat supply shopping and demand-side management (including power factor correction) as complementary strategies, not alternatives.

Power factor correction is a technical subject, but the business case is straightforward: reactive power that the utility has to deliver and you are not using productively costs money, and the fix is well understood. The payback period on capacitor banks depends on the existing power factor, the tariff structure, and the cost of installed equipment, all of which vary by facility.

For the supply side of the bill, current commercial rates across Texas, Ohio, Pennsylvania, Massachusetts, New Jersey, and Washington DC are available at ElectricRates.org. Rates as of July 2026 vary by state, utility territory, contract length, and load profile, so comparing live quotes is the most accurate way to assess where a business stands. Combine that with a power quality assessment from a licensed electrician, and a business owner has a complete picture of both the supply and delivery levers available to reduce the monthly electricity bill.