Missouri’s large investor-owned utilities did not change base rates on October 1, 2026. Both Ameren Missouri and Evergy Missouri Metro have increases pending before the Missouri Public Service Commission (PSC).
This article covers Ameren Missouri, which serves about 1.2 million electric customers, and Evergy Missouri Metro, which serves about 313,000. It does not cover Evergy Missouri West, Liberty or electric cooperatives.
Quick Summary
| Item | Utility | Status | Residential impact |
|---|---|---|---|
| Last base rate increase | Ameren Missouri | Approved April 23, 2025 | $355 million approved of $446 million asked |
| Pending rate case | Ameren Missouri | New rates expected mid-2027 | About +$13 a month (request) |
| Pending rate case | Evergy Missouri Metro | Hearings held July 2026 | Not stated in PSC notice |
| Usage fees | Columbia Water & Light | Oct. 1, 2026 | +6% |
Ameren Missouri
The last increase. On April 23, 2025, the PSC approved an agreement raising Ameren Missouri’s electric revenue by $355 million. Ameren had asked for $446 million. The $9 residential monthly customer charge was left unchanged.
The new request. Ameren has filed again, in case ER-2026-0291:
- Amount: a net increase of $343 million a year in electric base rates.
- Bills: about $13 a month for an average residential customer, according to KFVS.
- Timing: the intervention deadline was July 15, 2026. Ameren has said new rates would take effect in mid-2027.
The PSC also approved a large-load rate plan for Ameren in 2026, with protections intended to keep other customers from paying for the cost of serving very large users.
Evergy Missouri Metro
Evergy Missouri Metro filed on February 6, 2026 (case ER-2026-0143), asking for about $137.9 million more a year in base rates. The PSC held public hearings in Kansas City on July 14, in Marshall on July 15, and online on July 16. The PSC’s notice does not give a residential bill impact, and we found no decision.
A Real October 1 Change: Columbia
City-owned utilities are not regulated by the PSC. Columbia raised electric usage fees 6% starting October 1, 2026, as covered in our Columbia, Missouri article.
What This Means for Homeowners With Solar
We did not verify current Missouri net metering terms for this article. Note that a fixed customer charge, such as Ameren’s $9 a month, is not reduced by solar. Ask your utility how excess generation is credited before sizing a system.
Our solar payback guide shows how the retail rate and the export credit change the math.
What to Check on Your Bill
- The customer charge.
- The energy charge per kWh.
- The fuel adjustment line.
For help sorting the lines on your bill, see our guide to reading your electric bill.
What Happens Next
- Evergy Missouri Metro: a PSC decision, date not confirmed.
- Ameren Missouri: hearings and a decision ahead of mid-2027.
Limitations
The Ameren bill impact comes from a local TV report. We did not open the PSC case files, and we did not confirm the effective date of the 2025 Ameren increase or the percentage size of either pending request.
Sources
- Missouri PSC, “PSC Approves Agreement in Ameren Missouri Electric Rate Case,” April 23, 2025
- Missouri PSC, “PSC Sets Local Public Hearing Schedule for Evergy Missouri Metro Rate Case”
- Missouri PSC, “PSC Approves Ameren Missouri Large Load Power Rate Plan with Customer Protections”
- KFVS, “Ameren customers can tell Commission how they feel about rate hike requested by utility company,” July 1, 2026
Frequently asked questions
Did Missouri electric rates change on October 1, 2026?
Not at Ameren Missouri or Evergy, as far as we found. Columbia's city-owned utility raised electric usage fees 6% on that date.
How much is Ameren Missouri asking for?
A net $343 million a year in electric base rates, about $13 a month for an average residential customer, in case ER-2026-0291. It is a request, not an approved rate.
When would new Ameren Missouri rates start?
Ameren has said mid-2027. Missouri rate cases typically take about 11 months from filing.
