Ameren Missouri electric rates and bills
Ameren Missouri's 1,100,654 residential customers in Missouri paid an average of 13.26¢ per kWh in 2025, for an average bill of $136.92 a month on 1,032 kWh.1 Over the last 12 months (Sep 2025–Aug 2026) the average was 14.07¢, and 18.46¢ in August 2026.2
EIA-861 2025 final (released October 7, 2026) and EIA's monthly utility survey through August 2026 (preliminary); next monthly update expected November 24, 2026. Averages are revenue divided by kWh, all charges included: not the rate printed in a tariff.
65 of 115 Missouri counties served (EIA-861 2025)
Ameren Missouri's homes paid an average of 13.26¢ per kWh in 2025, 0.3% below the Missouri average, after a rise of 5.6%1 in a year while the Evergy utilities' averages fell. Its homes use the most electricity in winter but pay the highest average price per kWh in summer, and major event days made up most of their time without power.
Three numbers for the same price
Ameren Missouri, the operating name of Union Electric Company, delivered and sold electricity to 1,100,654 homes in 2025, 40.0%1 of Missouri's residential customers and more than any other utility in the state. What those homes pay per kWh depends on the period you ask about:
| Period | Average residential price |
|---|---|
| Calendar year 2025 (EIA-861, final) | 13.26¢1 |
| Last 12 months, September 2025 to August 2026 (EIA-861M) | 14.07¢ per kWh |
| August 20263 alone (EIA-861M, preliminary) | 18.46¢ per kWh2 |
All three are average revenue per kWh: everything residential customers were billed, the monthly customer charge, energy charges, fuel adjustment and riders, divided by the kWh they used. None of them is a tariff line. The 2025 and 12-month figures are the ones to compare with other utilities; the single month is a summer reading, and Ameren Missouri's summer months carry its highest prices, as the next section shows.
On the 2025 figure, Ameren Missouri ranked 15th lowest of the 32 Missouri utilities with 10,000 or more residential customers, 25.4% below the national average for investor-owned utilities. Among the 177 US utilities with 100,000 or more residential customers it was 44th lowest of 177, with a national median of 15.07¢ per kWh1.
Winter brings the most kWh, summer the dearest ones
Ameren Missouri's year does not follow the Missouri pattern. Statewide, use per home over the 12 months to August 2026 peaked in July 20263. At Ameren Missouri it peaked in January 2026, at 1,404 kWh per home, and bottomed out in April 2026 at 689 kWh2.
Source: EIA-861M monthly sales and revenue by utility. kWh per residential customer in each month (EIA-861M; months since January 2026 preliminary). The table adds the average bill and price for the month.
Show the numbers
| Month | kWh per customer | Bill per customer | ¢/kWh |
|---|---|---|---|
| September 2025 | 929 | $169.15 | 18.21¢ |
| October 2025 | 739 | $87.04 | 11.77¢ |
| November 2025 | 842 | $102.13 | 12.13¢ |
| December 2025 | 1,216 | $128.98 | 10.60¢ |
| January 2026 | 1,404 | $146.25 | 10.42¢ |
| February 2026 | 1,005 | $108.37 | 10.78¢ |
| March 2026 | 845 | $102.81 | 12.16¢ |
| April 2026 | 689 | $88.69 | 12.87¢ |
| May 2026 | 764 | $96.95 | 12.69¢ |
| June 2026 | 1,085 | $195.92 | 18.06¢ |
| July 2026 | 1,358 | $249.06 | 18.34¢ |
| August 2026 | 1,256 | $231.81 | 18.46¢ |
The bills do not scale with those kWh. The January 2026 bill, $146.25, came from the heaviest use of the year yet was only a few dollars above the 12-month average bill of $142.30. The reason is in the price per kWh: it is far lower in winter than in summer. The Missouri Public Service Commission's order in Ameren Missouri's 2024 electric rate case sets separate residential charges for the summer months, June through September. The summer charges help explain why the August 2026 average of 18.46¢ per kWh2 sat well above the 12-month figure, and above Missouri's statewide average for the same month, 16.02¢ per kWh3.
For a household budget, a big January kWh total can cost less per kWh than a moderate August one.
The 2025 increase and the rate case behind it
From 2024 to 2025 the residential average rose from 12.56¢ per kWh to 13.26¢ per kWh (+5.6%). The average monthly bill rose faster, from $124.23 to $136.92 (+10.2%), because use per home also went up, from 989 kWh4 to 1,032 kWh1 a month. Missouri's statewide residential average rose 3.0%5 over the same period.
The timing matches a rate decision. In April 2025 the commission approved settlements in that rate case, which Ameren Missouri had filed in June 2024, and the new tariffs took effect on June 1, 2025, as the summer months began. Current and past filings are on the commission's EFIS docket system; the guide to rate increases explains how such decisions reach a bill.
Source: EIA-861M monthly sales and revenue by utility; EIA, Electric Power Monthly / EIA-861M sales and revenue by state. Residential revenue divided by kWh in each month, as reported to EIA's monthly survey (EIA-861M; months since January 2026 preliminary).
Show the numbers
| Month | Ameren Missouri (¢/kWh) | kWh per customer | Bill per customer |
|---|---|---|---|
| January 2025 | 9.21¢ | 1,482 | $136.43 |
| February 2025 | 9.40¢ | 1,210 | $113.69 |
| March 2025 | 10.33¢ | 814 | $84.09 |
| April 2025 | 11.34¢ | 720 | $81.61 |
| May 2025 | 11.25¢ | 707 | $79.54 |
| June 2025 | 17.88¢ | 1,117 | $199.76 |
| July 2025 | 17.58¢ | 1,412 | $248.24 |
| August 2025 | 17.81¢ | 1,193 | $212.51 |
| September 2025 | 18.21¢ | 929 | $169.15 |
| October 2025 | 11.77¢ | 739 | $87.04 |
| November 2025 | 12.13¢ | 842 | $102.13 |
| December 2025 | 10.60¢ | 1,216 | $128.98 |
| January 2026 | 10.42¢ | 1,404 | $146.25 |
| February 2026 | 10.78¢ | 1,005 | $108.37 |
| March 2026 | 12.16¢ | 845 | $102.81 |
| April 2026 | 12.87¢ | 689 | $88.69 |
| May 2026 | 12.69¢ | 764 | $96.95 |
| June 2026 | 18.06¢ | 1,085 | $195.92 |
| July 2026 | 18.34¢ | 1,358 | $249.06 |
| August 2026 | 18.46¢ | 1,256 | $231.81 |
The monthly data show prices still rising in 2026. The August 2026 average was +3.6%2 on the same month a year earlier, against +4.6%3 for Missouri as a whole. These 2026 figures are preliminary.
Ameren Missouri among Missouri's utilities
In 2024, Ameren Missouri (12.56¢ per kWh) and Evergy Missouri West (12.55¢ per kWh4) were level. In 2025 Ameren's average rose while Evergy Missouri West's fell 3.6% to 12.10¢ per kWh, and Evergy Metro's slipped 0.7% to 13.63¢ per kWh. Liberty (Empire District) remained the highest of the five large utilities at 14.77¢ per kWh, and the municipal City Utilities of Springfield the lowest at 11.65¢ per kWh1.
Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.
Show the numbers
| Utility | average residential price (bundled customers) |
|---|---|
| City Utilities of Springfield (MO) | 11.65¢ |
| Evergy Missouri West (MO) | 12.10¢ |
| Ameren Missouri (MO) | 13.26¢ |
| Evergy Metro (MO) | 13.63¢ |
| Liberty (Empire District) (MO) | 14.77¢ |
The spread is narrow by national standards: Missouri's investor-owned utilities (13.24¢ per kWh), cooperatives (13.28¢ per kWh) and public power (13.32¢ per kWh) all averaged within a fraction of a cent of each other in 2025. Bills differ more than prices because use differs: Ameren Missouri homes used 1,032 kWh a month on average, Evergy Metro's 818 kWh, so Evergy Metro's average bill was $111.44 against Ameren's $136.921.
None of this is a choice. Missouri has no residential retail choice (01 homes bought from an alternative supplier in 2025). Ameren Missouri reports customers in 65 counties, and in 646 of them at least one other utility, often an electric cooperative or a city utility, also reports service, so the utilities' own maps decide by address.
Time-of-use is the usual residential rate
Ameren Missouri reported 931,654 residential customers enrolled in time-of-use pricing in 2025, 84.6% of its homes, on advanced meters installed at 99.9% of them. That is typical of Missouri's investor-owned utilities (Evergy Metro 89.5%, Liberty 99.5%) and puts the state's overall share of 53.2% 4th highest among the states. Across the river, sister utility Ameren Illinois had 15.8% of its residential customers on time-varying programs, of a different kind (real-time pricing and critical peak rebates7).
Under a time-of-use rate the same kWh costs more in peak hours than off-peak, on top of the summer and winter difference. EIA records enrollment only; the plans, their hours and prices are in Ameren Missouri's tariff on file with the commission. The time-of-use guide shows how such plans change a bill.
Rooftop solar is still uncommon: 8,998 residential net-metered installations in 2025, 8.2 per 1,000 customers, with 85.1 megawatts7 of capacity.
Major event days drove the outage total
Counting every event, Ameren Missouri customers averaged 594 minutes without power in 2025, more than the Missouri average of 369 minutes, with 1.18 interruptions per customer. Excluding major event days, the days of unusually widespread outages that utilities report separately under IEEE 1366, the figure falls to 119 minutes, close to Missouri's 115 minutes8 on the same basis. Ordinary days were unremarkable; major event days accounted for most of the minutes.
Source: EIA-861 2025, reliability. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.
Show the numbers
| Utility | outage minutes per customer (all events) |
|---|---|
| Liberty (Empire District) (MO) | 167 |
| Evergy Metro (MO) | 178 |
| Evergy Missouri West (MO) | 183 |
| Ameren Missouri (MO) | 594 |
| City Utilities of Springfield (MO) | 1,288 |
Business customers and the Ameren pair
Commercial customers paid an average of 10.29¢ per kWh in 2025 and industrial customers 8.19¢ per kWh, against 13.26¢ per kWh for homes; across all 1,271,896 accounts the average was 11.30¢ per kWh1.
Ameren also owns Ameren Illinois, whose residential default-service customers paid 16.70¢ per kWh1 in 2025. The two are not comparable line for line: Illinois has retail choice, and Ameren Illinois' figure covers only homes buying supply from the utility. The Ameren page sets the two side by side. Missouri households struggling with bills can apply for federal energy assistance; the state's LIHEAP allocation for fiscal 2026 was $92.4 million9. Electricity in Missouri has the statewide figures.
Where Ameren Missouri serves
Source: EIA-861 2025, service territory; Census Bureau, Cartographic boundary file, counties. EIA-861 2025 service territory: 65 counties. Counts whole counties even where the utility serves only part of one; check the utility's own service-area map for an address.
Questions and answers
What is Ameren Missouri's rate per kWh?
There is no single rate. On average, residential customers paid 13.26¢ per kWh1 in 2025 and 14.07¢ per kWh2 over the last 12 months (September 2025 to August 2026, 2026 months preliminary). These averages are total residential charges divided by kWh, so they include the customer charge, fuel adjustments and riders. The per-kWh lines in the tariff differ by season and, on time-of-use plans, by hour.
What is the average Ameren Missouri electric bill?
$136.92 a month in 2025 for 1,032 kWh1, up from $124.234 in 2024. Over the last 12 months the average was $142.30, ranging from $87.04 in October 2025 to $249.06 in July 20262.
Did Ameren Missouri rates go up in 2026?
On EIA's monthly figures, yes. In August 20263 residential customers paid an average of 18.46¢ per kWh, +3.6% against the same month a year earlier, and the 12 months to August 2026 averaged 14.07¢ per kWh2, above the 2025 figure of 13.26¢ per kWh1. The 2026 months are preliminary.
Is Ameren Missouri on time-of-use rates?
Most of its homes are. Ameren Missouri reported 931,654 residential customers enrolled in time-of-use pricing in 2025, 84.6%7 of its residential customers. The plan names, peak hours and prices are in its tariff with the Missouri Public Service Commission.
Related pages
Sources
- EIA-861 annual electric power industry report, 2025 final; table Sales_Ult_Cust_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861M monthly sales and revenue by utility; table sales_ult_cust_2025 and _2026; released October 23, 2026. www.eia.gov
- EIA, Electric Power Monthly / EIA-861M sales and revenue by state; table sales_revenue.xlsx (EPM Table 5.6.A); January 2001 to 2026-08; months since January 2026 preliminary; released October 23, 2026. www.eia.gov
- EIA-861 annual electric power industry report, 2024 final; table Sales_Ult_Cust_2024; 2024, final (file updated December 3, 2025); released December 3, 2025. www.eia.gov
- EIA, Historical state data, annual sales, revenue and customers; table HS861 2010-.xlsx; 2010-2025, final; released October 7, 2026. www.eia.gov
- EIA-861 2025, service territory; table Service_Territory_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861 2025, advanced meters, dynamic pricing and net metering; table Advanced_Meters, Dynamic_Pricing, Net_Metering 2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861 2025, reliability; table Reliability_2025; 2025, final; released October 7, 2026. www.eia.gov
- HHS, LIHEAP funding releases to states; table FY2027 first release; FY2026 final; FY2027 first release (October 9, 2026); FY2026 total; released October 9, 2026. acf.gov
- Census Bureau, Cartographic boundary file, counties; table cb_2025_us_county_5m; cb_2021_us_county_5m; 2025 (2021 for Connecticut). www.census.gov
How every figure is built: methodology. Found an error? Write to [email protected]; corrections are listed on the updates page.