Ameren Missouri (Union Electric) commercial electricity rates

• Average commercial price, 202510.29¢per kWh, all commercial customers
• vs Missouri average−1.6%state commercial average 10.46¢
• Commercial customers167,657largest of 41 in Missouri
• Average use6,957 kWha month per commercial customer
• Average bill$716a month per commercial customer
• Since 2015+18%from 8.69¢ per kWh
• Outages119 mina year per customer · US average 124

Ameren Missouri (Union Electric) is an investor-owned utility serving 65 counties in Missouri. Among the 41 Missouri utilities in EIA’s 2025 sales data with 500 or more commercial customers, it is the largest, with about 41% of the state’s commercial customers. EIA lists it as Union Electric Co.

Ameren Missouri commercial electricity prices, 2015 to 2025

In 2015 Ameren Missouri billed its commercial customers an average of 8.69¢ per kWh. In 2025 the figure was 10.29¢, so it rose 18% over 10 years. The average for all commercial customers in Missouri rose 14% over the same period. The latest year, 2025, is the highest of the 11 on record here. Between 2024 and 2025 it rose 5.8%.

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 Ameren Missouri

In 2025 the average commercial price at Ameren Missouri was 22% below the residential figure and 26% 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 Ameren Missouri’s commercial rates are set

Ameren Missouri is investor-owned, so its rates are set in cases before the Missouri Public Service 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 Missouri, so the levers are the schedule, the peak and the amount used.

Meters, time-varying rates and net metering at Ameren Missouri

EIA counts 155,229 commercial meters at Ameren Missouri in 2025, and 155,191 of them (more than 99%) are advanced meters (AMI), which record use at least hourly and report it to the utility at least daily. Of the rest, 38 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 Ameren Missouri, 7,485 commercial customers were on a time-varying rate in 2025, about 4.5% 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 Ameren Missouri reports offering commercial customers are time-of-use pricing.

EIA records 1,914 commercial net-metered generating systems at Ameren Missouri in 2025, with 54.0 MW of capacity between them: about 11 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 Ameren Missouri’s electric service?

Ameren Missouri customers went without power for an average of 119 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 594 minutes. These are averages over every customer of every class, so they describe the system and not any one street.

Where Ameren Missouri serves

EIA records Ameren Missouri serving customers in 65 Missouri counties: Adair, Audrain, Bollinger, Boone, Butler, Caldwell, Callaway, Camden, Cape Girardeau, Chariton, Clark, Clay, Clinton, Cole, Cooper, Crawford, Daviess, DeKalb, and 47 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 Missouri

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

• Evergy Missouri West (8.74¢)
• Evergy Metro (10.41¢)
• Liberty (12.44¢)
• City Utilities of Springfield (9.37¢)

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 Ameren Missouri’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 Missouri 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: Ameren Missouri commercial electricity rates, CommercialElectricityRates.com, from EIA Form EIA-861 final 2025 data.

Common questions about Ameren Missouri

What is the average commercial electricity rate at Ameren Missouri?

Ameren Missouri billed its commercial customers in Missouri an average of 10.29¢ per kWh in 2025, according to the U.S. Energy Information Administration. That is 1.6% below the Missouri commercial average of 10.46¢. 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 Ameren Missouri?

About $716 a month in 2025, on average use of about 6,957 kWh a month. That is Ameren Missouri’s commercial revenue divided by its 167,657 commercial customers. A few very large accounts pull the average up, so most businesses pay less than this.

Have Ameren Missouri’s commercial electricity rates gone up?

The average Ameren Missouri billed commercial customers rose 18% between 2015 and 2025, from 8.69¢ to 10.29¢ per kWh. The Missouri commercial average rose 14% over the same period.

How reliable is Ameren Missouri’s electric service?

Ameren Missouri customers averaged 119 minutes without power in 2025, excluding major storms, against a 124-minute average for U.S. utilities reporting the same way (EIA).

Does Ameren Missouri use smart meters for businesses?

EIA counts 155,191 advanced (AMI) meters among Ameren Missouri’s 155,229 commercial meters in 2025, which is more than 99%. 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 Ameren Missouri?

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 Ameren Missouri’s tariff.