Ameren Missouri electricity rates
Union Electric Co, as the EIA and URDB list it
Union Electric Co's customers paid 12.6¢ per kWh in 2024, riders included (EIA-861): about $124 a month for 989 kWh. 1(M) Residential Overnight Saver Service, the lowest of 4 open plans at 1,000 kWh a month, comes to $1,406 a year, at the typical hour-by-hour use of homes in Missouri. Schedule retrieved October 8, 2026.
Every priced Union Electric Co plan, 1,000 kWh/mo
| Plan | Per year | vs cheapest | Effective |
|---|---|---|---|
| 1(M) Residential Overnight Saver Service✓ cheapesttime-of-use · in effect since October 2024 | $1,406.35 | — | 11.7¢ |
| 1(M) Residential Anytime Service Ratepriced by season · tiered · in effect since October 2024 | $1,436.00 | +$29.65 | 12.0¢ |
| 1(M) Residential Smart Saver Servicetime-of-use · in effect since October 2024 | $1,586.63 | +$180.28 | 13.2¢ |
| 1(M) Residential Evening/Morning Saver Servicetime-of-use · tiered · in effect since October 2024 | $1,604.37 | +$198.02 | 13.4¢ |
| Priced but not ranked — restricted, older, or not verifiable as a bill | |||
| 1(M) Residential Ultimate Saver Servicetime-of-use · demand charge · in effect since October 2024 · billed on peak kW, which monthly use cannot price; not ranked | $1,269.33 | −$137.02 | 10.6¢ |
| 1(M) Residential Grandfathered Optional TOD (Time Of Day)time-of-use · tiered · in effect since October 2024 · closed to new customers | $1,444.57 | +$38.22 | 12.0¢ |
Price Union Electric Co’s plans at your own usage
The cheapest Union Electric Co plan at each level of use
- 500 kWh/mo — cheapest $757.19 (1(M) Residential Overnight Saver Service), dearest $890.59, a $133.40 spread
- 1,000 kWh/mo — cheapest $1,406.35 (1(M) Residential Overnight Saver Service), dearest $1,604.37, a $198.02 spread
- 2,000 kWh/mo — cheapest $2,579.76 (1(M) Residential Anytime Service Rate), dearest $3,065.28, a $485.52 spread
What Union Electric Co's customers were billed in 2024
Priced at 989 kWh a month, what Union Electric Co's customers used on average, its open plans come within 1% of what EIA reports they were billed in 2024: the plans here describe its bills well.
| Ownership, as EIA classes it | Investor-owned |
|---|---|
| Full-service homes in Missouri | 1,095,619 |
| Share of Missouri's households | 37% |
| Average use per home | 989 kWh a month |
| Average bill per home | $124.23 a month |
| Billed per kWh, riders included | 12.6¢ |
| Median open plan here, at that use | 12.6¢ |
Union Electric Co - (MO) in U.S. Energy Information Administration, Form EIA-861, 2024 (Sales_Ult_Cust_2024.xlsx), retrieved September 23, 2026.
How the 1(M) Residential Anytime Service Rate bill at 1,000 kWh has moved since 2017
Union Electric Co's 1(M) Residential Anytime Service Rate cost $110.00 a month under its April 2017 version, filed then as 1(M) Residential Service Rate, and costs $119.67 under its October 2024 one, 8.8% more. Its biggest single step, in February 2022, added $17.56 (19%). In Missouri, EIA's average price rose 16% between 2017 and 2025.
Every version of 1(M) Residential Anytime Service Rate
| Took effect | At 1,000 kWh | Change | Record |
|---|---|---|---|
| October 2024 | $119.67 | −$0.25 (−0.2%) | URDB |
| December 2023as 1(M) Residential Service Rate | $119.92 | +$10.03 (+9.1%) | URDB |
| February 2022as 1(M) Residential Service Rate | $109.89 | +$17.56 (+19.0%) | URDB |
| April 2020as 1(M) Residential Service Rate | $92.33 | −$7.18 (−7.2%) | URDB |
| January 2019as 1(M) Residential Service Rate | $99.51 | −$9.44 (−8.7%) | URDB |
| February 2018as 1(M) Residential Service Rate | $108.95 | −$1.05 (−1.0%) | URDB |
| April 2017as 1(M) Residential Service Rate | $110.00 | First on record | URDB |
In the guides: Why electricity rates change
How it compares
Among the 100 utilities indexed, Union Electric Co's cheapest open plan is the 9th-lowest, 25% less than their median of $1,877.14. It sits between Entergy New Orleans Inc ($1,391.52) and Snohomish County PUD No 1 ($1,410.41).
No other utility indexed in Missouri has a cheaper open plan; the other 3 all start higher.
Its fixed charge, $9.00 a month on 1(M) Residential Overnight Saver Service, is lower than on the cheapest plan of 83 of the other 99 utilities.
1(M) Residential Evening/Morning Saver Service is tiered: past 750 kWh a month, each kWh costs 3.4¢ less. Of the 47 utilities whose plans step, that is the 13th-largest step.
1(M) Residential Overnight Saver Service changes price with the season: a kWh costs 7.1¢ more in June to September than in October to May, and the same 1,000 kWh is billed $156.55 in its dearest month against $96.50 in its cheapest.
In the guides: What a bill costs before a single kilowatt-hour · The price that changes once the meter passes a line · The price that changes with the month
Cheapest 6 plans at 1,000 kWh a month
1(M) Residential Overnight Saver Service — $1,406.35 a year, 11.7¢ per kWh effective, time-of-use. It carries a $9.00 monthly standing charge. In effect since October 2024.
1(M) Residential Anytime Service Rate — $1,436.00 a year, 12.0¢ per kWh effective, tiered and priced by season. It carries a $9.00 monthly standing charge. In effect since October 2024.
1(M) Residential Smart Saver Service — $1,586.63 a year, 13.2¢ per kWh effective, time-of-use. It carries a $9.00 monthly standing charge. In effect since October 2024.
1(M) Residential Evening/Morning Saver Service — $1,604.37 a year, 13.4¢ per kWh effective, tiered and time-of-use. It carries a $9.00 monthly standing charge. In effect since October 2024.
1(M) Residential Ultimate Saver Service — $1,269.33 a year, 10.6¢ per kWh effective, time-of-use and demand-charged. It carries a $9.00 monthly standing charge. In effect since October 2024. Not ranked: it bills on peak demand, which monthly use cannot price.
1(M) Residential Grandfathered Optional TOD (Time Of Day) — $1,444.57 a year, 12.0¢ per kWh effective, tiered and time-of-use. It carries a $9.00 monthly standing charge. In effect since October 2024. Restricted: closed to new customers.
How Union Electric Co's plans are structured
Of 6 priceable plans: 3 tiered, 5 time-of-use, 1 priced by season, 1 with demand charges.
Every plan carries a $9.00 fixed monthly charge.
Union Electric Co's published schedules
EIA-861 lists Union Electric Co serving homes in Missouri and in no other state, which is how its plans are placed there. 6 of its 6 published residential schedules can be priced.
When Union Electric Co's time-of-use plans charge most
1(M) Residential Overnight Saver Service charges 16.9¢ a kWh every day 6 am to 10 pm, June to September, against 6.3¢ in its cheapest hours; those dearest hours are 22% of the year. Homes in Missouri typically put 26% of their electricity in them (NREL ResStock).
1(M) Residential Smart Saver Service charges 41.3¢ a kWh weekdays 3 pm to 7 pm, June to September, against 7.1¢ in its cheapest hours; those dearest hours are 4% of the year. Homes in Missouri typically put 6% of their electricity in them (NREL ResStock).
In the guides: Time-of-use plans, hour by hour