Alliant Energy (Interstate Power and Light) commercial electricity rates in Iowa

• Average commercial price, 202515.05¢per kWh, all commercial customers
• vs Iowa average+39%state commercial average 10.84¢
• Commercial customers85,8462nd largest of 16 in Iowa
• Average use4,006 kWha month per commercial customer
• Average bill$603a month per commercial customer
• Since 2015+44%from 10.42¢ per kWh
• Outages74 mina year per customer · US average 124

Alliant Energy (Interstate Power and Light) is an investor-owned utility serving 84 counties in Iowa. Among the 16 Iowa utilities in EIA’s 2025 sales data with 500 or more commercial customers, it is the 2nd largest, with about 34% of the state’s commercial customers. EIA lists it as Interstate Power and Light Co.

Alliant Energy commercial electricity prices, 2015 to 2025

In 2015 Alliant Energy billed its commercial customers an average of 10.42¢ per kWh. In 2025 the figure was 15.05¢, so it rose 44% over 10 years. The average for all commercial customers in Iowa rose 22% over the same period. The latest year, 2025, is the highest of the 11 on record here. Between 2024 and 2025 it rose 12%.

Average use and average bill are the utility’s commercial sales and revenue divided by its commercial customers and by twelve. The bill is an all-in figure: energy, delivery, demand and fixed charges together. A few very large customers pull both averages up, so most businesses use and pay less than the average.

Residential, commercial and industrial prices at Alliant Energy

In 2025 the average commercial price at Alliant Energy was 15% below the residential figure and 72% above the industrial one. Larger customers take power at a higher voltage and use it more steadily, so at most utilities the average falls from residential to commercial to industrial. Which class an account falls in is the utility’s decision, and the line between commercial and industrial is drawn differently from one utility to the next.

How Alliant Energy’s commercial rates are set

Alliant Energy is investor-owned, so its rates are set in cases before the Iowa Utilities Commission and published in a tariff, which is a public document. A commercial account is billed on a rate schedule, chosen by the size of the account and the voltage it takes power at, and a schedule usually combines a fixed monthly charge, a charge per kWh and, above a certain size, a demand charge on the highest rate of draw in the month. The schedule code is printed on the bill. There is no competitive supply market for ordinary commercial accounts in Iowa, so the levers are the schedule, the peak and the amount used.

Meters, time-varying rates and net metering at Alliant Energy

EIA counts 83,908 commercial meters at Alliant Energy in 2025, and 81,744 of them (97%) are advanced meters (AMI), which record use at least hourly and report it to the utility at least daily. Of the rest, 41 are automated-reading (AMR) meters, which send a reading to the utility for billing only, and 2,123 are standard meters. An advanced meter is what makes interval data possible, and interval data is what shows when a building’s peak demand happens.

At Alliant Energy, 4,717 commercial customers were on a time-varying rate in 2025, about 5.5% of its commercial customers. A time-varying rate charges more in some hours than in others, so when a business uses power matters as well as how much. The kinds Alliant Energy reports offering commercial customers are time-of-use pricing.

EIA records 3,442 commercial net-metered generating systems at Alliant Energy in 2025, with 133 MW of capacity between them: about 40 for every 1,000 commercial customers. Net metering credits a customer for power its own system sends to the grid; the terms are in the utility’s tariff.

How reliable is Alliant Energy’s electric service?

Alliant Energy customers went without power for an average of 74 minutes in 2025, excluding major storms, with about 0.76 interruptions per customer. The average across U.S. utilities reporting the same way is 124 minutes. With major storms counted the figure was 89 minutes. This utility reports on a different measurement standard, so the comparison is only approximate. These are averages over every customer of every class, so they describe the system and not any one street.

Where Alliant Energy serves

EIA records Alliant Energy serving customers in 84 Iowa counties: Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler, Carroll, Cass, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clarke, and 66 more. A county can be shared between utilities, so this does not tell you who serves a given address. The utility that serves an address is the one named on its bill.

EIA lists MISO as its balancing authority. MISO is one of the organised wholesale markets, which run the grid and the wholesale power market across their area.

Other utilities in Iowa

The average each billed its commercial customers in 2025. The Iowa page has the state’s own figures and every utility with 500 or more commercial customers.

• MidAmerican Energy (8.87¢)

What these figures can and cannot tell you

• They are averages over every commercial customer. A utility whose commercial customers are mostly large averages fewer cents per kWh than one serving mostly small shops, so a lower figure can mean larger customers and not a lower rate.
• They are not a rate schedule. None of these figures is a charge printed in Alliant Energy’s tariff, and nothing here works out a bill from one. The tariff index lists the utilities whose filed schedules are quoted on this site.
• They are annual and final. EIA publishes utility figures once a year. The Iowa page carries the state’s trailing 12 months, which is more recent and still preliminary.

For one building, the cost estimator gives a range by building type, size and state, and price by utility sets every utility side by side. Commercial vs residential vs industrial compares the classes in every state.

Data: every year of these figures, for this utility and every other with a page, is in one CSV, free to use with credit to the U.S. Energy Information Administration and this site. To cite this page: Alliant Energy commercial electricity rates, CommercialElectricityRates.com, from EIA Form EIA-861 final 2025 data.

Common questions about Alliant Energy

What is the average commercial electricity rate at Alliant Energy?

Alliant Energy billed its commercial customers in Iowa an average of 15.05¢ per kWh in 2025, according to the U.S. Energy Information Administration. That is 39% above the Iowa commercial average of 10.84¢. It is the utility’s commercial revenue divided by its commercial sales, so it describes the whole class and is not the rate on any one schedule.

How much is the average commercial electric bill at Alliant Energy?

About $603 a month in 2025, on average use of about 4,006 kWh a month. That is Alliant Energy’s commercial revenue divided by its 85,846 commercial customers. A few very large accounts pull the average up, so most businesses pay less than this.

Have Alliant Energy’s commercial electricity rates gone up?

The average Alliant Energy billed commercial customers rose 44% between 2015 and 2025, from 10.42¢ to 15.05¢ per kWh. The Iowa commercial average rose 22% over the same period.

How reliable is Alliant Energy’s electric service?

Alliant Energy customers averaged 74 minutes without power in 2025, excluding major storms, against a 124-minute average for U.S. utilities reporting the same way (EIA).

Does Alliant Energy use smart meters for businesses?

EIA counts 81,744 advanced (AMI) meters among Alliant Energy’s 83,908 commercial meters in 2025, which is 97%. An advanced meter records use at least hourly, which is what makes interval data and time-varying rates possible.

Is this the rate my business will pay Alliant Energy?

No. It is an average over every commercial customer, from a corner shop to a campus. What one business pays depends on its rate schedule, how much it uses and how hard it draws at its peak. The schedule code is printed on the bill, and the schedule itself is in Alliant Energy’s tariff.