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Mississippi Power rate increase

Electric · Mississippi · Investor-owned utility · part of Southern Company

In effect

Last checked

Mississippi Power's latest approved rate change took effect July 2026: Excess deferred tax refund to customers over 18 months, from July 2026. See the details below for what the sources say about bill impacts.

Details and sources

Rate changes, newest first

Excess deferred tax refund to customers over 18 months, from July 2026

Other · Electric

In effect

Typical residential bill

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

Filed
Not disclosed
Decided
June 18, 2026
Effective
July 2026
Requested increase
Not disclosed
Approved change
−$21 million
Docket
Not disclosed

Alongside the 2026 performance plan review, the Mississippi PSC approved returning about $21M of excess federal deferred income taxes to customers. The credit is spread over 18 months starting with the first July 2026 billing cycle, so it runs through about the end of 2027. No per-household amount has been published.

Utility's stated reasons

  • return of excess deferred income taxes from the 2017 federal tax law
Sources (1) · Verified against regulator or utility filings

Last verified Oct 26, 2026

2026 Performance Evaluation Plan rate increase (1.8%)

Other · Electric

In effect

Typical residential bill

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

Filed
November 17, 2025
Decided
June 18, 2026
Effective
January 2026
Requested increase
$20 million
Approved increase
$20 million
Docket
2019-UN-219

Under its Performance Evaluation Plan formula, Mississippi Power raised retail revenues by about 1.8%, or $20M a year, from the first January 2026 billing cycle, subject to refund. The PSC approved the evaluation report in June 2026, along with the use of about $7M from the company's reliability reserve.

Utility's stated reasons

  • increased investment in the system
  • higher depreciation
Sources (3) · Verified against regulator or utility filings

Last verified Oct 26, 2026

Annual fuel cost recovery increase, February 2026

Fuel / purchased power · Electric

In effect

Typical residential bill

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

Filed
Not disclosed
Decided
January 13, 2026
Effective
February 2026
Requested increase
$40 million
Approved increase
$40 million
Docket
2025-UN-114

The Mississippi PSC approved Mississippi Power's request to raise retail fuel revenues by $40M a year from the first February 2026 billing cycle. To soften the increase, about $31M of fuel costs under-recovered as of October 2025 was deferred to the company's next fuel filing, so it is still owed by customers later.

Utility's stated reasons

  • higher recoverable fuel costs
  • under-recovered fuel costs from prior periods
Sources (2) · Verified against regulator or utility filings

Last verified Oct 26, 2026

2025 Performance Evaluation Plan rate increase (4.0%)

Other · Electric

In effect

Typical residential bill

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

Filed
Not disclosed
Decided
June 17, 2025
Effective
April 2025
Requested increase
Not disclosed
Approved increase
$41 million
Docket
Not disclosed

The Mississippi PSC approved Mississippi Power's 2025 Performance Evaluation Plan filing in June 2025, raising retail revenues by about 4.0%, or $41M a year. About $22M took effect with the first April 2025 billing cycle and the remaining $19M or so in July 2025.

Sources (1) · Verified against regulator or utility filings

Last verified Oct 26, 2026

Who decides

Utility website: www.mississippipower.com

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Last checked Oct 26, 2026. Spotted something out of date? Tell us.