Full service
13.26¢
per kWh, 2025 average revenue
$136.92 / month at 1,032 kWh
Price +5.6% from 2024
Investor Owned · 1,100,654 residential customers · Missouri
Why is my Ameren Missouri electric bill so high?
EIA respondent: Union Electric Co - (MO). Reviewed October 14, 2026. Also searched as Ameren.
In 2025, Ameren Missouri reported 1,100,654 residential full service customers under the EIA name Union Electric Co - (MO). Average revenue was 13.26¢ per kWh. The average monthly bill in that filing was $136.92 for 1,032 kWh.
13.26¢ is about even with Missouri's 2025 statewide residential average of 13.30¢. In July 2026 the state residential price was 16.09¢, versus 15.56¢ a year earlier (+3.4%). The utility number is a 2025 annual average. The state number is one later month. They answer different questions.
From 2024 to 2025, the average monthly bill for full service changed +10.2%. Average use changed +4.4% and average price changed +5.6%. Holding the 2024 price fixed, the usage change accounts for $5.44 a month. The price change, applied to 2025 usage, accounts for $7.28.
EIA Form 861, 2025 final · Reviewed October 14, 2026
EIA Electric Power Monthly, Table 5.6.A · Reviewed October 14, 2026
The rate on the record
Investor-owned base rates are usually set in a state docket. Riders can change outside a full rate case. Average revenue per kilowatt-hour is total residential revenue divided by residential sales. It is not a tariff schedule.
| Service | Customers | Price | Monthly use | Monthly bill | Vs 2024 price |
|---|---|---|---|---|---|
| Full service | 1,100,654 | 13.26¢ | 1,032 kWh | $136.92 | +5.6% |
EIA-861 sales to ultimate customers, 2025 final, compared with 2024 · Reviewed October 14, 2026
Audit the full service average
Revenue 1,808,473 thousand dollars. Sales 13,633,524 MWh. Customers 1,100,654. Cents per kWh = revenue ÷ megawatt-hours × 100. Monthly bill = revenue × 1,000 ÷ customers ÷ 12.
Why a Ameren Missouri bill moved
The price change was the larger piece
Hold a Ameren Missouri household to the filing average and the monthly full service bill changed +10.2% between those two EIA years. Holding the 2024 price fixed, the usage change of +4.4% is worth $5.44 a month. The price change of +5.6%, from 12.56¢ to 13.26¢, is worth $7.28 on 2025 usage.
Near the Missouri average
13.26¢ per kWh is about even with Missouri's 2025 residential average of 13.30¢. July 2026 in the state was 16.09¢, versus 15.56¢ a year earlier (+3.4%). The utility figure is a full year of average revenue. The state figure is one later month. A household that uses more than 1,032 kWh will not land on $136.92.
One full-service average
1,100,654 residential customers were on Ameren Missouri full service in 2025, at 13.26¢ per kWh. That average folds in the customer charge and whatever riders the utility booked as residential revenue. It is not the last block on a tiered tariff.
Missouri PSC approved $355 million, effective June 1, 2025
Missouri Public Service Commission, File No. ER-2024-0319. The April 23, 2025 order approves stipulations that let Union Electric, doing business as Ameren Missouri, increase annual electric revenues by $355 million, effective June 1, 2025. The June 28, 2024 filing had requested about $446.2 million. The order applies an equal percentage increase to the residential class and… The rate-case section has the full citation.
Season
The 2025 monthly average for this Ameren Missouri service was 1,032 kWh, and the Missouri residential average was 1,038 kWh. A single month can sit far from either figure. Compare kilowatt-hours with the same month last year before you treat the whole increase as a rate hike.
Time-of-use is already on the EIA schedule
EIA's 2025 dynamic-pricing file shows residential time-of-use activity at Ameren Missouri, with 931,654 residential customers enrolled in dynamic pricing. The expensive window is in the tariff, not in that enrollment count. Shifting a dishwasher or an EV charger only helps if you are actually on that schedule.
EIA-861 2025 and 2024 residential sales · Reviewed October 14, 2026
Rate cases and hikes
decided · File No. ER-2024-0319
Missouri PSC approved $355 million, effective June 1, 2025
The April 23, 2025 order approves stipulations that let Union Electric, doing business as Ameren Missouri, increase annual electric revenues by $355 million, effective June 1, 2025. The June 28, 2024 filing had requested about $446.2 million. The order applies an equal percentage increase to the residential class and leaves the residential customer charge at $9.00. The compliance tariffs also rebase fuel-adjustment and renewable-standard costs into base rates.
Missouri PSC order approving stipulations, April 23, 2025 (Missouri Public Service Commission) · Reviewed October 14, 2026
open · File No. ER-2026-0291
2026 request for about $343 million is suspended
On June 26, 2026 Ameren Missouri filed tariff sheets designed to increase gross annual electric revenues by about $343 million, and to rebase net energy costs that would otherwise flow through the fuel adjustment clause. The commission's July 8, 2026 order suspended those sheets until June 1, 2027. This is a request, not an approved hike.
Hearings were set into 2027. No residential bill impact from a final order exists yet.
Missouri PSC tariff sheet for ER-2026-0291 (Missouri Public Service Commission) · Reviewed October 14, 2026
Assistance
LIHEAP is the federal bill program, and the state contact list is the place to start. A Ameren Missouri income discount, medical baseline, or budget-billing rule was not retrieved from Missouri Public Service Commission. That offer needs verification.
LIHEAP program · State and territory contacts · Ameren Missouri site
The company homepage is linked for navigation. Program rules on that site were not reviewed. Needs verification.
LIHEAP · Reviewed October 14, 2026
How to lower the bill
- Read the kilowatt-hours against this filing's average of 1,032 kWh a month. If your use is the thing that moved, the dollar total can rise on an unchanged rate.
- On the statement, separate the base energy charge from fuel or rider lines. A rider can move the total in a month when no new base-rate order exists.
- Match this month's weather to last year's same month. A mild comparison month makes an ordinary bill look like a hike.
- Start with LIHEAP for Missouri (https://www.acf.hhs.gov/ocs/map/liheap-map-state-and-territory-contact-listing). A Ameren Missouri discount beyond that program needs verification.
- 931,654 residential customers were already on a dynamic price in the 2025 EIA file. If you are one of them, the window on the tariff is the lever. If you are not, calling the utility to discuss the schedule is the first step, not shifting load you are not being charged extra for.
- If the read is marked estimated, the next actual read can true the account up or down. The tariff rule for that true-up needs verification.
Full service at the 2025 average price
| Monthly use | Estimated bill |
|---|---|
| 500 kWh | $66.30 |
| 750 kWh | $99.45 |
| 1,000 kWh | $132.60 |
| 1,500 kWh | $198.90 |
| 2,000 kWh | $265.20 |
Usage times the average price. At very low use, a real bill is often higher because a fixed customer charge does not shrink. The tariff needs verification.
Questions people ask
Why is my Ameren Missouri electric bill so high?
In 2025, Ameren Missouri reported 1,100,654 residential full service customers under the EIA name Union Electric Co - (MO). Average revenue was 13.26¢ per kWh. The average monthly bill in that filing was $136.92 for 1,032 kWh. 13.26¢ is about even with Missouri's 2025 statewide residential average of 13.30¢. In July 2026 the state residential price was 16.09¢, versus 15.56¢ a year earlier (+3.4%). The utility number is a 2025 annual average. The state number is one later month. They answer different questions. From 2024 to 2025, the average monthly bill for full service changed +10.2%. Average use changed +4.4% and average price changed +5.6%. Holding the 2024 price fixed, the usage change accounts for $5.44 a month. The price change, applied to 2025 usage, accounts for $7.28.
What was Ameren Missouri's average residential rate?
Using 2025 EIA-861 revenue and sales, the full service average was 13.26¢ per kWh. Average use was 1,032 kWh a month and the average bill was $136.92. This folds in whatever customer charges and riders the utility reported. It is not the marginal rate on your tariff.
Did Ameren Missouri raise rates?
Missouri Public Service Commission File No. ER-2024-0319 (decided): Missouri PSC approved $355 million, effective June 1, 2025. Missouri Public Service Commission File No. ER-2026-0291 (open): 2026 request for about $343 million is suspended. Separately, the EIA average price moved +5.6% from 2024 to 2025. The annual average and the docket are not the same document.
What bill assistance can Ameren Missouri customers ask about?
LIHEAP is the federal program for home energy bills (https://www.acf.hhs.gov/ocs/programs/liheap). Ameren Missouri may also offer an income-qualified discount, budget billing, or a medical baseline. The current offer, income cutoff, and how to apply need verification on the utility site and with the state LIHEAP office and Missouri Public Service Commission.
Are data centers why this bill went up?
Large computing load is raising U.S. electricity demand, and regulators can later recover new generation and wires costs from customers. EIA has not published a dollar line that isolates data centers on this utility's residential bill. That pass-through needs verification.