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ElectricityRatePerKWh

Ameren (Ameren Missouri and Ameren Illinois) Electricity Rate per kWh in 2026

Residential Rate
14.55¢
Commercial
11.80¢
Customers
2.5M
Rate Type
seasonal

How much does Ameren charge per kWh in 2026?

Ameren’s estimated effective residential rate is about 14.55 cents per kWh as of June 2026. A typical home using 1,000 kWh a month pays roughly $155, including the about $9 monthly customer charge. Commercial service runs about 11.80c/kWh. This is a representative average; your exact rate depends on the tariff, season, and fuel and rider charges on Ameren’s official rate schedule.

2026 published rate: Ameren is the parent of two rate-regulated utilities, Ameren Missouri and Ameren Illinois, so the Ameren rate most people search for splits by state. In Missouri the average residential price was about 13.68 cents per kWh in May 2026 (EIA); in Illinois the statewide average was 23.85 cents, but that figure is dominated by ComEd's Chicago territory, and Ameren Illinois' central and southern Illinois service area runs well below it. The roughly 14.55 cents shown above is a customer-weighted blend across both states. The 2026 rate story differs by state. In Missouri, the Public Service Commission approved a unanimous settlement in Ameren Missouri's rate case (ER-2024-0319) on 23 April 2025, raising overall electric revenue about 11 percent and a typical residential bill about 12 percent, roughly $14 a month, effective 1 June 2025; the settlement held the residential customer charge at $9 rather than the $10.43 Ameren sought and cut the increase from the 15.5 percent ($446.2 million) Ameren originally requested. Ameren Missouri has since filed a new case seeking about $343 million, roughly $13 more a month for a typical residential customer, in an 11-month review that would take effect around mid-2027 if approved. In Illinois, Ameren is a delivery-only utility: supply is bought through the state's competitive market or the utility's default Price to Compare, which regulators set at 11.326 cents per kWh for the first 800 kWh for summer 2026 (1 June to 30 September 2026), with distribution delivery charges billed on top and a $9 monthly residential customer charge; Ameren Illinois delivery rates rose at the start of 2026 under Illinois Commerce Commission orders. Ameren serves about 2.5 million electric customers across the two states. Missouri PSC case ER-2024-0319 (settlement approved 23 Apr 2025); Illinois Price to Compare (Plug In Illinois / ICC), summer 2026; EIA state averages, May 2026.

About Ameren

Ameren (Ameren Missouri and Ameren Illinois) serves approximately 2.5 million residential customers across MO, IL. The estimated effective residential rate is about 14.55 cents per kWh as of June 2026 - a representative average; see the official tariff schedule for your exact rate.

Service area: About 2.5 million electric customers across two states through two subsidiaries: Ameren Missouri serves roughly 1.3 million customers in central and eastern Missouri, including the greater St. Louis area, and Ameren Illinois serves about 1.2 million customers across central and southern Illinois (Peoria, Springfield, Champaign, Decatur, and the Metro East area near St. Louis). ComEd serves northern Illinois including Chicago.

Parent company: Ameren Corporation (NYSE: AEE)

Recent rate case: Ameren files rate cases separately in Missouri and Illinois. In Missouri, the Public Service Commission approved a unanimous settlement in case ER-2024-0319 on 23 April 2025, raising overall electric revenue about 11 percent and a typical residential bill about 12 percent (roughly $14 a month), effective 1 June 2025, and holding the residential customer charge at $9 rather than the $10.43 Ameren sought; the increase was cut from the 15.5 percent ($446.2 million) originally requested. Ameren Missouri has since filed a new case seeking about $343 million (about $13 more a month for a typical residential customer) in an 11-month review that would take effect around mid-2027 if approved. In Illinois, Ameren is a delivery-only utility whose distribution rates rose at the start of 2026 under Illinois Commerce Commission orders; default supply is set by the Price to Compare (11.326 cents per kWh for the first 800 kWh, summer 2026). Consult the tariff schedule linked above for current approved pricing.

Ameren Bill Calculator: Cost by Monthly Usage

Estimated monthly bill at 14.55c/kWh plus the $9 fixed charge. Formula: kWh x rate + fixed charge.

Monthly usageEstimated bill
250 kWh$45.38/mo
500 kWh$81.75/mo
750 kWh$118.13/mo
1,000 kWh (typical home)$154.50/mo
1,250 kWh$190.88/mo
1,500 kWh$227.25/mo

A representative estimate using the effective average rate. Your exact bill depends on the tariff, season, and fuel and rider charges. Calculate with your own usage ->

Quick Reference
Fixed charge$9/mo
States servedMO, IL
Rate structureseasonal
Official tariff schedule ->
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Use our bill calculator for an estimate with your actual kWh usage.

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State Rate
Missourielectricity rate ->

Ameren on Form EIA-861: 2024 Reported Sales, Customers and Realised Prices

EIA's 2024 Form 861 census lists 2 operating companies behind Ameren (Union Electric Co (MO), utility 19436; Ameren Illinois Company, utility 56697), together serving 2,156,513 residential accounts (bundled plus delivery-only) in MO, IL across 146 counties. Weighted across those companies, the 2024 average realised residential price for bundled service was 13.35 cents per kWh (total residential revenue divided by total residential sales). The spread runs from 12.56c (Union Electric Co (MO), Missouri) to 15.26c (Ameren Illinois Company, Illinois). These are annual averages of what customers actually paid, including fuel and rider charges, so they will not match the tariff rate on a current bill; the estimated effective rate above is the site's forward-looking figure.

Operating companyEIA #StateOwnershipRes. accountsResidentialCommercialIndustrialRank in stateShare of res. MWhCounties
Union Electric Co (MO)19436MOInvestor Owned1,095,61912.56c9.73c7.60c1 of 4536.9%65
Ameren Illinois Company56697ILInvestor Owned1,060,89415.26c13.04c4.75c2 of 2523.9%81

Data year 2024, EIA-861 final released 3 December 2025. Res. accounts = residential accounts served, bundled plus delivery-only where the company has delivery-only rows; the residential, commercial and industrial prices are the bundled figures (the price basis). Rank is by residential accounts served among the state's utilities with bundled or delivery service; share is the company's share of the state's residential sales in MWh, not of its customers. Delivery-only rows show the wires charge only.

Source and method

Source: U.S. Energy Information Administration, Form EIA-861 Annual, 2024 final data (public domain), retrieved 28 August 2026; prices are average realised revenue per kWh, not tariffs. Final 2024 file f8612024.zip (released 3 December 2025) from the EIA-861 detailed data files. Preliminary 2025 figures come from the early-release file f8612025er.zip (4 August 2026), which EIA has not yet validated; they are labelled as such wherever shown and never mixed into a final figure.

Frequently Asked Questions

What is the Ameren rate per kWh in 2026?+
Ameren is the parent of two rate-regulated utilities, Ameren Missouri and Ameren Illinois, so the Ameren rate most people search for splits by state. In Missouri the average residential price was about 13.68 cents per kWh in May 2026 (EIA); in Illinois the statewide average was 23.85 cents, but that figure is dominated by ComEd's Chicago territory, and Ameren Illinois' central and southern Illinois service area runs well below it. The roughly 14.55 cents shown above is a customer-weighted blend across both states. The 2026 rate story differs by state. In Missouri, the Public Service Commission approved a unanimous settlement in Ameren Missouri's rate case (ER-2024-0319) on 23 April 2025, raising overall electric revenue about 11 percent and a typical residential bill about 12 percent, roughly $14 a month, effective 1 June 2025; the settlement held the residential customer charge at $9 rather than the $10.43 Ameren sought and cut the increase from the 15.5 percent ($446.2 million) Ameren originally requested. Ameren Missouri has since filed a new case seeking about $343 million, roughly $13 more a month for a typical residential customer, in an 11-month review that would take effect around mid-2027 if approved. In Illinois, Ameren is a delivery-only utility: supply is bought through the state's competitive market or the utility's default Price to Compare, which regulators set at 11.326 cents per kWh for the first 800 kWh for summer 2026 (1 June to 30 September 2026), with distribution delivery charges billed on top and a $9 monthly residential customer charge; Ameren Illinois delivery rates rose at the start of 2026 under Illinois Commerce Commission orders. Ameren serves about 2.5 million electric customers across the two states. (Source: Missouri PSC case ER-2024-0319 (settlement approved 23 Apr 2025); Illinois Price to Compare (Plug In Illinois / ICC), summer 2026; EIA state averages, May 2026.)
What is the current Ameren rate per kWh?+
Ameren (Ameren Missouri and Ameren Illinois)'s estimated effective residential rate is about 14.55 cents per kWh as of June 2026. This is a representative average; your exact rate depends on the tariff, season, and fuel/rider charges shown on the utility's official rate schedule (linked below). The estimated commercial rate is 11.80c/kWh, and the monthly fixed customer charge is roughly $9 regardless of usage.
What rate structure does Ameren use?+
Ameren (Ameren Missouri and Ameren Illinois) uses a seasonal rate structure. Seasonal rates vary between summer and winter billing periods, reflecting demand patterns in the service area.
How do I calculate my Ameren bill from the rate per kWh?+
Multiply your monthly kilowatt-hours by the per-kWh rate, then add the fixed customer charge. Using Ameren's estimated effective residential rate of 14.55 cents per kWh and its roughly $9 monthly fixed charge, a home using 750 kWh a month works out to about (750 x $0.1455) + $9 = $118.13 a month. The table above shows the same math across usage levels from 250 to 1,500 kWh. This is a representative estimate; your exact rate depends on the tariff, season, and fuel and rider charges on the official schedule linked above.
How do I find my Ameren rate on my bill?+
Your electricity bill shows the total kWh consumed and the charges applied. Look for the 'energy charge' or 'supply charge' line item - this is the per-kWh rate times your usage. Delivery charges (transmission and distribution) are listed separately and represent a significant portion of your total rate. The fixed customer charge appears as a flat line item. Your effective combined rate (all charges / total kWh) may differ from the tariff rate due to the fixed charge amortization.
What recent rate changes has Ameren made?+
Ameren files rate cases separately in Missouri and Illinois. In Missouri, the Public Service Commission approved a unanimous settlement in case ER-2024-0319 on 23 April 2025, raising overall electric revenue about 11 percent and a typical residential bill about 12 percent (roughly $14 a month), effective 1 June 2025, and holding the residential customer charge at $9 rather than the $10.43 Ameren sought; the increase was cut from the 15.5 percent ($446.2 million) originally requested. Ameren Missouri has since filed a new case seeking about $343 million (about $13 more a month for a typical residential customer) in an 11-month review that would take effect around mid-2027 if approved. In Illinois, Ameren is a delivery-only utility whose distribution rates rose at the start of 2026 under Illinois Commerce Commission orders; default supply is set by the Price to Compare (11.326 cents per kWh for the first 800 kWh, summer 2026). Consult the tariff schedule linked above for current approved pricing.
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