Missouri Electricity Rates: Ameren Missouri vs Evergy Comparison

Missouri is served by two major investor-owned utilities: Ameren Missouri in the eastern part of the state (including St. Louis) and Evergy in the western part (including Kansas City). Understanding how each provider structures its rates, what drives cost differences, and what assistance programs are available can help Missouri residents manage their electricity costs more effectively.

The average residential electricity rate in Missouri is approximately 12.9 cents per kWh, which is below the national average of about 16.4 cents per kWh. However, your actual rate depends heavily on which utility serves your area, your rate plan, and your usage patterns.

Ameren Missouri

Ameren Missouri serves approximately 1.2 million electric customers in eastern Missouri, covering a service territory that includes St. Louis, Columbia, Jefferson City, and surrounding communities. As a regulated utility operating under the oversight of the Missouri Public Service Commission, Ameren's rates are set through a formal regulatory process rather than market competition.

Ameren Missouri Rate Structure

Ameren Missouri's residential rate structure includes several components that together determine your monthly bill:

Customer Charge: ~$9/month — a fixed charge that covers basic service regardless of usage
Energy Charge: Per-kWh rate that forms the bulk of most residential bills
Fuel Adjustment Clause: A monthly fuel cost recovery charge that reflects changes in the cost of fuel used to generate electricity. This charge can vary month to month based on market conditions for coal, natural gas, and other fuels.
Environmental Cost Recovery: Charges related to emissions compliance costs and environmental regulations

Average residential rate: approximately 12.4 cents per kWh

Ameren also offers a variety of rate options to help customers manage their energy usage and costs, including Anytime Users, Smart Savers, and Off-Peak rate plans. These plans are designed to fit different lifestyles — whether you want the flexibility to use electricity at any time, prefer to save by shifting usage to off-peak hours, or are looking for a plan that rewards energy efficiency.

Ameren's Generation Mix

Ameren relies heavily on coal and nuclear power, with growing investments in solar and wind energy. The company is working to build new renewable energy projects and upgrade its system to provide more reliable and sustainable power going forward. Each bit of progress in diversifying the generation mix contributes to a more resilient energy system and can influence long-term rate stability for customers.

Evergy (formerly KCP&L and Westar)

Evergy serves approximately 600,000 electric customers in the Kansas City metropolitan area and western Missouri. Formed from the merger of Kansas City Power & Light (KCP&L) and Westar Energy, Evergy operates across both Missouri and Kansas.

Evergy Rate Structure

Evergy's residential rate structure includes:

Customer Charge: ~$14/month — higher than Ameren's fixed charge
Energy Charge: Per-kWh rate
Fuel and Purchased Power: Variable cost recovery that reflects the utility's fuel and power purchase costs
Transmission Delivery Charge: Grid maintenance and transmission infrastructure costs

Average residential rate: approximately 13.5 cents per kWh

The number of rate components can vary depending on regulatory decisions, and certain charges like fuel adjustments are designed to pass through changes in fuel costs directly to customers. These adjustments reflect the effect of market conditions on electricity rates.

Provider Comparison

When it comes to choosing between service territories (or evaluating your current provider), it is important to look beyond just the per-kWh rate:

| Factor | Ameren Missouri | Evergy |

|--------|----------------|--------|

| Service Area | Eastern MO (St. Louis) | Western MO (Kansas City) |

| Customers | ~1.2 million | ~600,000 |

| Customer Charge | ~$9/month | ~$14/month |

| Avg Residential Rate | ~12.4¢/kWh | ~13.5¢/kWh |

| Rate Plan Options | Anytime, Smart Savers, Off-Peak | Standard, TOU available |

| Primary Fuel | Coal, Nuclear | Coal, Wind, Natural Gas |

Ameren Illinois, serving customers just across the state line, may offer different rate options or have unique service areas, so it is important to compare what is available in your specific location. In addition to rates, consider the provider's reputation for reliability, the quality of customer service, and any extra resources they offer, such as energy efficiency programs or budget billing options.

Missouri's Regulatory Environment

Missouri is a regulated state, meaning you cannot choose your electricity supplier — your provider is determined by your geographic location. However, recent legislation has allowed utilities to implement:

Time-of-use rates for interested customers
Demand response programs with bill credits
Solar rebate programs for rooftop installations

State regulators like the Missouri Public Service Commission play a crucial role in overseeing electricity rates and ensuring that providers deliver reliable and affordable service. Customers and community members can participate in public hearings, especially during key months like January and February, to provide input on proposed rate changes and discuss the effect of new policies.

Eligibility for certain programs is based on income or other criteria, and the introduction of these programs reflects the state's commitment to supporting energy affordability.

Missouri Energy Assistance

A significant number of utility disconnections occur in Missouri each year, with many households in vulnerable communities impacted. Disconnections tend to spike in September and October as rising bills and financial hardship increase. Several programs exist to help:

LIHEAP through the Department of Social Services — federal assistance for heating and cooling costs
Utilicare program for low-income seniors
Cold Weather Rule protection from November 1 – March 31, triggered when temperatures fall below a certain threshold
Utility company payment arrangements — both Ameren and Evergy offer payment plans for customers facing hardship

These programs are designed to help keep the heat and lights on in every house, especially during critical months when disconnections are most common.

Tips for Missouri Residents

Compare your usage to similar homes using utility tools and our electricity cost by ZIP code calculator
Consider time-of-use rates if you can shift usage to off-peak hours — Ameren's Smart Savers plan can reduce costs significantly
Explore solar options — Missouri has net metering, and both utilities offer solar rebate programs
Weatherize your home — both utilities offer rebates for insulation, windows, and HVAC upgrades. Check your windows for drafts and consider using blackout curtains to improve energy efficiency and reduce cooling costs in summer.
Manage heating costs in winter — Set your thermostat efficiently and look into utility programs that provide support for heating expenses, especially during colder months
Verify your bill — Upload your Ameren or Evergy bill for independent third-party verification to ensure you are on the right rate plan and not being overcharged. See how it works — view pricing

Missouri Electricity Rates: Ameren Missouri vs Evergy Comparison