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Ameren Missouri electric rates

Updated October 7, 2026 · Source: EIA Form 861 (2024), ER-2026-0291

Investor-owned utility serving 1,095,619 homes in Missouri.

Your rate

12.56¢per kWh, average residential rate 24% lower than the U.S. average (16.4¢)

$114average monthly bill at the current tariff$1,368 a year

989kWh used per month, average home

+21%rate change since 2020U.S. average: +28%

Rate increase pending

About $13 more per month

Ameren Missouri filed June 26, 2026 for $343 million more per year (10.25% ROE, $16.7 billion rate base), a 10.2% residential increase of $154.53 per year (about $12.88/month). Money is for new generation, grid reliability and load growth including data centers. The PSC's 11-month review means a decision and new rates around mid-2027 (tariffs nominally effective Aug 3, 2026 but suspended).

If approved as filed, a typical 989 kWh bill goes from $114 to $127 a month. See the case →

Estimate your bill

Electricity you use each month (kWh)

It's on your bill, usually near the top. Starting at 989 kWh, the average for Ameren Missouri homes.

kWh

$114 a month

$9 fixed charge + 10.6¢ × 989 kWh

This is an estimate. Tariff: $9.00 fixed + 10.6¢/kWh effective June 1, 2025 (source). Ameren Missouri Rate 1(M) Residential Service (Anytime), effective Jun 1 2025: customer charge $9.00/mo; energy 15.60 c/kWh summer (Jun-Sep); winter (Oct-May) 10.62c first 750 kWh, 7.14c over 750. cents_kwh = winter first-block base rate ONLY; Rider FAC fuel adjustment (varies; value not retrieved) and other riders are excluded. A new rate case (ER-2026-0291, ~$13/mo typical increase) seeks rates effective by Jun 1 2027. Your bill also includes taxes and fuel adjustments that change month to month.

Rate cases

Docket	Status	Filed	Requested	Approved	Effective
ER-2026-0291	Pending	June 26, 2026	10.2% ($343M)	—	June 1, 2027
ER-2024-0319	Approved	June 28, 2024	15% ($446.2M)	12%	June 1, 2025

ER-2026-0291: Ameren Missouri filed June 26, 2026 for $343 million more per year (10.25% ROE, $16.7 billion rate base), a 10.2% residential increase of $154.53 per year (about $12.88/month). Money is for new generation, grid reliability and load growth including data centers. The PSC's 11-month review means a decision and new rates around mid-2027 (tariffs nominally effective Aug 3, 2026 but suspended). Source

ER-2024-0319: Ameren Missouri sought $446.2 million (about 15% overall); the PSC approved a unanimous settlement on April 23, 2025 for roughly an 11% overall increase, about 12% or $14/month for a typical residential customer, effective June 1, 2025. The $9.00 residential customer charge was kept flat. Money covers generation (Castle Bluff, renewables), grid investment and storm costs. Source

Rate history

Ameren Missouri's average rate is up 21% since 2020, versus +28% for the U.S. average.

Average residential revenue per kWh, EIA-861. Includes delivery and, where the utility sells it, supply.

Rebates for heat pumps, batteries and EV chargers

We haven't found utility-level rebates for Ameren Missouri yet. Check Missouri programs or read what's left after the federal credits ended.

About Ameren Missouri

Legal name: Union Electric Co (Ameren)
Ownership: Investor Owned
Homes served: 1,095,619 residential customers (2024)
Grid operator: MISO
Retail choice: No — one bundled rate
Data: EIA-861 2024, released October 7, 2026; rate cases checked October 7, 2026

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