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Ameren Missouri rate increase

Electric · Missouri · Investor-owned utility · part of Ameren Corporation

Proposed

Last checked

Ameren Missouri has a pending increase of about +$13.00/month for a typical 1,011 kWh home starting June 2027, if regulators approve the request.

Details and sources · Estimate for your home

Rate changes, newest first

2026 electric rate review (new rates expected mid-2027)

Base rate case · Electric

Proposed

Typical residential bill (1,011 kWh/month)

  • +$13.00/mostarting June 2027Ameren Missouri's estimate ('about $13 a month') for the average residential customer using 1,011 kWh. Its filing schedules show a 10.2% increase in residential base-rate revenue.

Proposed amounts; regulators may change them.

Filed
June 26, 2026
Decision expected
May 2027
Requested effective
June 2027
Requested increase
$343 million
Approved increase
Pending
Docket
ER-2026-0291

Ameren Missouri filed on June 26, 2026 for about $343 million more in annual electric base revenue (10.25% ROE requested), citing storm-hardening, grid and generation investments. It says the average 1,011 kWh residential bill would rise about $13 a month and proposes a new income-eligible discount. The PSC review runs up to 11 months, with a decision expected by May 2027.

Utility's stated reasons

  • storm hardening and grid upgrades after 2025 tornadoes
  • upgrades at existing plants and 400 MW of new generation
  • higher cost of capital since the last rate review
Sources (4) · Verified against regulator or utility filings

Last verified Sep 29, 2026

2024 electric rate review (rates from June 2025)

Base rate case · Electric

In effect

Typical residential bill

Not stated for a specific usage level. Any figures the sources give are in the summary below.

Filed
June 28, 2024
Decided
April 23, 2025
Effective
June 1, 2025
Requested increase
$446.2 million
Approved increase
$355 million
Docket
ER-2024-0319

Ameren Missouri asked in June 2024 for about $446.2 million more per year. On April 23, 2025 the PSC approved a black-box settlement for $355 million, effective June 1, 2025, with the $9 residential customer charge unchanged. Ameren estimated about $14 a month more for the average residential customer (about 12%, per St. Louis Public Radio); its original request was about $17 at 1,011 kWh.

Utility's stated reasons

  • Smart Energy Plan grid investments and storm hardening
  • higher cost of capital and depreciation
  • new solar generation
Sources (6) · Verified against regulator or utility filings

Last verified Sep 29, 2026

What it could mean for your bill

Sources state the impact for one typical home. Enter your own usage or bill for a rough estimate.

For: 2026 electric rate review (new rates expected mid-2027) (proposed)

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Who decides

Utility website: www.amerenmissouri.com

Related

Last checked Oct 2, 2026. Spotted something out of date? Tell us.