Ameren Missouri has filed a fresh request with state regulators to hike base electric rates, a move that could tack roughly $13 a month onto the average residential bill once new prices kick in around mid-2027. The filing starts an approximately 11 month review at the Missouri Public Service Commission, which will sort out how much of the tab lands with customers and how much comes out of shareholders’ pockets.
What Ameren Asked For
In documents submitted to the commission, Ameren is seeking to boost annual electric revenues by about $343 million, built on a proposed $16.7 billion rate base and a 10.25% return on common equity. The company says the change would raise the typical monthly bill for a household using about 1,011 kilowatt-hours by roughly $13.
In a press release via PR Newswire, and in a Form 8-K filed with the SEC, Ameren laid out the revenue request along with a timetable that anticipates a commission decision sometime next spring.
Who Would Get a Break
The filing also outlines a new income-eligible discount rate that Ameren says is meant to buffer the impact on the most vulnerable customers. The proposal includes a 20% discount for households under 150% of the federal poverty line and a 10% discount for other qualifying ratepayers. The reporting pegs those thresholds at roughly $23,914 for an individual and $49,500 for a four-person household.
Consumer advocates say they plan to dig into how that program is targeted, how people will qualify, and how it will actually be administered once the Missouri PSC moves into hearings. As reported by St. Louis Public Radio, advocates want clear, enforceable rules around eligibility, outreach and implementation.
Why Ameren Says It Needs the Money
Ameren told regulators that the additional revenue is aimed at paying for storm-hardening work after tornado and severe-weather damage, replacing aging poles with more weather-resistant materials, expanding smart-grid technology to detect outages faster, and adding roughly 400 megawatts of generation to support reliability across the system.
Company filings and statements link the proposal to infrastructure that is already in service and to projects that Ameren says have helped reduce outage hours. The utility also notes that a prior rate agreement that took effect June 1, 2025, raised rates by about 12% and generated roughly $355 million in additional revenue to cover earlier projects, according to contemporaneous reporting. Missouri Independent and the company’s SEC filings provide background on that earlier increase.
What Comes Next at the PSC
The Missouri Public Service Commission’s online e-filing system now lists the new tariff case and service list, showing a proceeding that could stretch up to about 11 months, with a final order expected in the spring and any approved rates taking effect in mid-2027.
Over the coming months, the PSC will accept interventions from interested parties, written testimony from experts, and public comment from customers. The commission will also schedule hearings where Ameren and consumer representatives can present evidence and cross-examine witnesses. Customers who want to follow or participate in the case can look up docket ER-2026-0291 on the PSC’s website. Missouri PSC e-filings list the filing and outline the procedural steps ahead.
What Customers and Advocates Are Saying
Local consumer groups are already gearing up to probe the details of the proposal and argue for stronger protections for low-income households. The Consumers Council of Missouri has said it wants to make sure customers’ voices are front and center during the lengthy review process.
Ameren, meanwhile, has pointed customers toward existing bill-assistance programs and online tools, while emphasizing what it describes as reliability gains from recent investments in the grid. The company also reported stronger segment earnings earlier this year. Ameren Missouri logged $76 million in first-quarter 2026 earnings, up from $42 million in the same quarter a year earlier, a result highlighted in its recent investor materials. Consumers Council of Missouri and the company’s earnings release provide additional context for those numbers, and PR Newswire reported the quarterly results.
