An electric utility is any company or organization in the business of generating electricity and selling it to the public. That broad definition, drawn from federal law, covers everything from massive corporations serving millions of customers to small town-owned operations with a few thousand accounts. In the United States, roughly 3,000 electric utilities operate under different ownership structures, regulatory frameworks, and market rules, but they all serve the same basic function: keeping the lights on.
How Electricity Gets to You
The electricity supply chain has three stages, and a utility may be involved in one, two, or all three of them.
Generation is where electricity is produced. Power plants burn natural gas, split atoms, capture wind, convert sunlight, or use other energy sources to create electrical current. The voltage coming out of a power plant isn’t suitable for long-distance travel, so “step up” substations increase it before it leaves the facility.
Transmission moves that high-voltage power over long distances through networks of steel towers, heavy-duty conductor cables, and high-voltage substations. These are the tall metal structures you see running alongside highways, carrying power from where it’s generated to the metro areas and regions where people actually use it.
Distribution is the final leg. “Step down” substations reduce the voltage, and a network of lower-voltage lines carries power shorter distances to homes, businesses, and industrial sites. The transformers you see on wooden poles or in green boxes on the ground reduce the voltage even further before it enters your building. Distribution systems typically operate below 34,000 volts, compared to transmission lines that can carry hundreds of thousands of volts.
Three Types of Electric Utilities
Not all utilities are structured the same way. The differences affect how decisions get made, where the money goes, and how much influence customers have.
Investor-owned utilities (IOUs) are the most common type in the U.S. They’re structured like other corporations, with shareholders who expect a return on their investment. The utility owns and operates infrastructure to sell energy to retail customers at a profit, and that profit flows back to shareholders. Think of companies like Duke Energy, Southern Company, or Pacific Gas & Electric.
Electric cooperatives are owned by their members, who are also the customers. Instead of answering to shareholders seeking investment returns, co-ops answer to the people they serve. Members often vote on operational matters like rate increases, infrastructure spending, or how to handle budget surpluses. Where an investor-owned utility would distribute surplus revenue as shareholder profits, a cooperative might return it to members as bill credits. Co-ops tend to serve rural areas and smaller communities.
Public utilities are owned by a government entity, whether that’s a city, county, state, or the federal government (as with entities like the Tennessee Valley Authority). A municipality has ultimate ownership and responsibility for a publicly owned utility, and elected officials or appointed boards typically oversee operations. Because they don’t need to generate profit for investors, public utilities can sometimes offer lower rates, though that’s not guaranteed.
Regulated vs. Deregulated Markets
Where you live determines whether your utility controls the entire process or just part of it. In regulated markets, utilities are “vertically integrated,” meaning they own or control the total flow of electricity from generation all the way to your meter. One company handles everything.
In deregulated markets, the chain is broken up. Utilities in these states are prohibited from owning generation and transmission infrastructure. They handle only distribution: maintaining lines from the grid interconnection point to your meter, reading that meter, and sending you a bill. Separate companies compete to generate and sell power, and in many deregulated states you can choose your electricity supplier while the local utility still delivers it. Texas, parts of the Northeast, and several other states operate under some form of deregulation.
How Utility Rates Are Set
If you’ve ever wondered why your electric bill looks the way it does, the answer starts with a process called ratemaking. A utility must be allowed to recover the costs it prudently spends to serve customers, but it can’t just charge whatever it wants. Regulators determine how much revenue a utility needs and how that revenue should be collected.
The process begins with a revenue requirement: the total costs the utility incurred during a 12-month period that regulators consider representative of ongoing expenses. Then a cost-of-service study figures out how to split those costs fairly among different types of customers (residential, commercial, industrial). The study looks at three things for each customer group: how many customers there are, how much electricity they use over the year, and how much they demand at peak times.
Your monthly bill typically reflects two or three separate charges. A fixed customer charge covers the cost of your meter, the service line to your building, meter reading, and billing. An energy charge, measured in cents per kilowatt-hour, covers costs that rise and fall with how much electricity you use. Large commercial and industrial customers also pay a demand charge based on their peak usage, since serving high-demand customers requires the utility to maintain more capacity.
Regulators try to balance competing goals when approving rates. Rates need to generate enough revenue to keep the utility financially healthy, but they also need to be fair, avoiding situations where one group of customers subsidizes another.
Who Regulates Electric Utilities
Oversight happens at both the state and federal level, with each layer covering different territory.
State public utility commissions (sometimes called public service commissions) regulate the retail side of the business. They hear rate cases and approve the prices utilities charge customers. They review applications when utilities want to pass along increased wholesale electricity costs. And they mediate complaints when customers have problems with their electric service. Every state has one of these agencies, though the name and exact powers vary.
The Federal Energy Regulatory Commission (FERC) handles the interstate side. FERC regulates the transmission and wholesale sale of electricity that crosses state lines, reviews mergers and acquisitions among electricity companies, and protects the reliability of the high-voltage transmission system through mandatory standards. FERC also licenses hydroelectric projects and monitors energy markets for manipulation. Importantly, FERC is an independent agency, meaning it operates outside direct presidential control.
Modern Grid Technology
The utility industry is no longer just poles, wires, and power plants. Utilities are deploying technology that makes the grid more responsive, efficient, and resilient.
Smart meters, formally called advanced metering infrastructure, replace the old analog meters that required someone to physically read them. These digital meters communicate your usage data back to the utility in near real time, enabling more accurate billing, faster outage detection, and time-of-use pricing that can reward you for shifting electricity use to off-peak hours.
Energy storage is another area where utilities are investing heavily. Battery systems can store electricity generated during low-demand periods and release it during peak hours, reducing the need for expensive new substations or backup power plants. Even thermal storage plays a role: utilities can use off-peak electricity to make ice overnight, then use that ice to cool buildings the next day, shifting air conditioning demand away from the afternoon peak.
These technologies matter because the grid is increasingly two-directional. Rooftop solar panels, home batteries, and electric vehicles are turning customers into both consumers and producers of electricity, and utilities need smarter infrastructure to manage that complexity.