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Editor: Katerine G., Editor & Data Researcher · Research & publishing: Electric Consumer Editorial Team · Data retrieved · Sources named on this page: EIA-861, EIA retail sales · How we got these numbers · Report an error

Ameren Illinois Company: 11.76 ¢/kWh for homes, 121 minutes of SAIDI

In Illinois, Ameren Illinois Company bills 1,224,108 accounts, 86.7% residential, as an investor owned utility. Among the 3 Ameren utilities listed here it is cheapest for homes, -0.81 ¢ from their median.

Edwards power plant in Peoria County, Illinois
Peoria County, Illinois - DSCF2641-330. Photo by Joe K Gage, CC BY-SA 2.0, Wikimedia Commons. Illustrative, not a listed utility's plant.

At 842 kWh a month a Ameren Illinois Company home pays about $99 in energy: 11.76 ¢/kWh, 25.9% below the Illinois average of 15.87 ¢.

Among the 3 Ameren utilities listed here it is cheapest for homes, -0.81 ¢ from their median.

Ameren Illinois Company against its group: Ameren

Home price place, Ameren group
1 of 3-0.81 ¢ from the median of 12.56 ¢

Take the 3 Ameren utilities listed here, sorted by home price: Ameren Illinois Company is the cheapest at 11.76 ¢, while the group median is 12.56 ¢. The most expensive is Union Electric Membership Corp (NC) at 13.37 ¢, 1.61 ¢ above; the spread from top to bottom is 1.61 ¢.

On outage minutes it ranks 3 of 3 (1 = fewest), with 121 against a group median of 94. By accounts it is number 2, with 1,224,108 against 1,264,469 for Union Electric Co.

How it compares

Ameren Illinois Company
Ameren Illinois Company, 2024HomeBusinessBillSAIDI
Ameren Illinois CompanyLowest in this table11.76 ¢/kWh6.03 ¢/kWh$99at 842 kWh121 minSAIDI
Illinois average against this company, which is 1 of 7 on price+4.11 ¢/kWhcompany 25.9% below+5.78 ¢/kWhcompany 48.9% below+$35a month at 842 kWh-22 mincompany 22 above
Commonwealth Edison Co13.39 ¢/kWhcompany 12.2% below7.34 ¢/kWhcompany 17.8% below$11314 more than company36 mincompany 85 above

Compare 23 Illinois companies

Ameren Illinois Company: 2025

No 2025 early-release row for Ameren Illinois Company; 2024 stays the latest year.

Ameren Illinois Company 2024 against Illinois 2025
-5.93 ¢11.76 ¢ for Ameren Illinois Company in 2024, 17.69 ¢ for Illinois in 2025

EIA's early release leaves Ameren Illinois Company out for 2025. Its newest record stays 2024: 11.76 ¢/kWh across 1,060,894 home accounts and 121 minutes of SAIDI.

Carbon context

Ameren Illinois Company serves 1,060,894 homes in Illinois. At 842 kWh a month that is about 180 kg of CO₂, or 2,162 kg a year, at the Illinois plant rate, state generation and not this utility: Illinois generation mix.

Ameren Illinois Company charts

Residential price since 2015: 11.76 ¢ in 2024

7.43 ¢ in 2015, 11.76 ¢ in 2024 (+58.2%); Illinois 12.50 to 15.87 ¢.

Ameren Illinois Company residential price 2015-2024, 2015 to 2024: 10 rows
YearAmeren Illinois CompanyGap to Illinois residentialGap to U.S. residential
20157.43-5.07-5.22
20167.77-4.77-4.78
20177.92-5.03-4.97
20187.04-5.73-5.83
20197.28-5.75-5.73
20207.52-5.52-5.63
20218.08-5.10-5.58
202211.36-4.29-3.68
202312.91-2.80-3.09
202411.76-4.11-4.72

10 rows from EIA retail sales.

CSV

Ameren Illinois Company SAIDI, 2015-2024

130 min in 2015, 121 in 2024.

Ameren Illinois Company SAIDI by year, 2015 to 2024: 10 rows
YearAmeren Illinois Compan, no major events
2015130
2016124
2017118
2018111
2019132
2020101
2021118
2022115
2023114
2024121

10 rows from EIA-861 survey.

CSV

Reliability: SAIDI 120.6 min

120.6 min, 1.21x the median reporter, rank 400 of 673.

min

  • Company, no major events120.6
  • Company, with major events223.9

Ameren Illinois Company, Reliability: EIA-861 survey.

CSV

Analyst note

From 7.43 ¢ in 2015 to 11.76 ¢ in 2024, a move of +58.2%: Ameren Illinois Company outpaced its state (+27.0%) by 31.3 points, and +28.0 points against the U.S. Full-service customers alone pay 15.26 ¢ per EIA, against 11.76 ¢ for all rows: buyers of energy elsewhere pay Ameren Illinois Company for delivery only. Ameren Illinois Company's sharpest move came in 2022, +40.6%. The high is 12.91 ¢ (2023) and the low 7.04 ¢ (2018). 2024: -8.9% here, +1.0% for the Illinois average. SAIDI at Ameren Illinois Company (major events excluded) went from 130 minutes in 2015 to 121 in 2024, -7%, between 101 (2020) and 132 (2019). At 121 minutes in 2024, Ameren Illinois Company sat +21 from the national SAIDI median, with 0 of 10 years below it. 2023: 592 minutes with major events, 114 without, the widest gap of any year. Ameren Illinois Company has 0 cheaper and 6 higher-priced Illinois peers among 7 with 20,000+ homes. Next higher-priced, City of Springfield, bills 11.95 ¢ (+0.20).

Price is the selling point in this record: 25.9% under the Illinois average, with 121 outage minutes close to the national median (1.21x).

Home accounts at Ameren Illinois Company went from 1,060,473 in 2015 to 1,060,894 in 2024, +0.0%. Business customers paid 0.51 times the home price in 2024 (6.03 against 11.76 ¢); the ratio was 0.53 in 2015. SAIFI went from 1.04 in 2015 to 0.91 in 2024, between 0.82 and 1.04.

Facts

Customer accounts
1,224,10820.3% of Illinois total
Residential accounts
1,060,89419.7% of Illinois homes
Commercial accounts
162,24013.3% of the base
Residential rate
11.76 ¢/kWhplace 1 of 7, -25.9% against the state
Commercial rate
6.03 ¢/kWhplace 1 of 18, -48.9% against the state
SAIDI, no major events
120.6 minbetter than 41% of reporters
SAIFI, no major events
0.910.90x the median
SAIDI with major events
223.9 min46.1% from event days
Net-metered capacity
648.9 MW45,577 installations
Counties served
81all in Illinois
Average residential use
10,101 kWh/yr842 a month
Implied monthly bill
$99-$40 on the U.S. rate, 842 kWh
Residential rate since 2015
+58.2%7.43 to 11.76 ¢/kWh
SAIDI trend
-7%130 min in 2015, 121 in 2024

Data tables

2024 by sector, Ameren Illinois Company

Ameren Illinois Company sectorAccountsRate ¢/kWhGap to Illinois ¢/kWh
Residential1,060,89411.76-4.11
Commercial162,2406.03-5.78

Year by year, Ameren Illinois Company

YearHome accounts, Ameren Illinois CompanHome ¢Business ¢RatioSAIDISAIFI
20151,060,4737.433.960.531301.04
20161,062,5157.774.210.541241.04
20171,059,3007.924.370.551180.90
20181,058,4717.043.970.561110.90
20191,059,1347.284.130.571320.99
20201,060,2667.524.350.581010.82
20211,063,0268.084.730.581180.88
20221,061,97511.366.590.581150.88
20231,060,03012.916.730.521140.82
20241,060,89411.766.030.511210.91

Peers of Ameren Illinois Company in Illinois, place 1 of 7 on home price

Utility near Ameren Illinois Company on priceSAIDI min, gap to Ameren Illinois CompanyHome ¢, gap to Ameren Illinois CompanyGap % to Ameren Illinois CompanyAccounts, Ameren Illinois Company = 1
1. Ameren Illinois Company (this utility)12111.76-1.00
2. City of SpringfieldNo data+0.20+1.7%0.06
3. City of NapervilleNo data+1.22+10.4%0.05
4. Commonwealth Edison Co-85+1.64+13.9%3.37

Who buys Ameren Illinois Company's electricity

Class at Ameren Illinois CompanyAccountsOf Ameren Illinois Company accountsOf Ameren Illinois Company MWh soldkWh a year per Ameren Illinois Company account
Residential1,060,89486.7%31.9%10,101
Commercial162,24013.3%35.4%73,263
Industrial and other9730.08%32.7%11,268,528

Ameren Illinois Company among Ameren group

Ameren Illinois Company and its neighbours on priceSAIDI min, gap to Ameren Illinois CompanyHome ¢, gap to Ameren Illinois CompanyAccounts, Ameren Illinois Company = 1
1. Ameren Illinois Company (IL, this utility)12111.761.00
2. Union Electric Co (MO)-27+0.811.03
3. Union Electric Membership Corp (NC)-67+1.610.07

Ameren Illinois Company: meters, rate options and solar

MeasureAmeren Illinois CompanyIllinois contextAmeren Illinois Company detail
Ameren Illinois Company home meters on AMI99.9%Illinois 93.6%1,061,338 of 1,062,170 meters
Homes with daily digital access693,497Illinois figure not published65% of the 1,060,894 home accounts
Time-of-use rate for Ameren Illinois Company homesOffered7 of 23 Illinois utilities offer one146,005 homes on dynamic pricing, 13.76% of 1,060,894
Net-metered installations45,57788% residential38.0 homes per 1,000 accounts, 14.2 kW average

Monthly energy cost by use, Ameren Illinois Company

kWhShare of a 842 kWh monthCost a month at 11.76 ¢vs U.S.Cost a year
25030%$29.39-$11.81$353
50059%$58.78-$23.62$705
75089%$88.17-$35.43$1,058
1,000119%$117.56-$47.24$1,411
1,500178%$176.33-$70.87$2,116
2,000238%$235.11-$94.49$2,821

Outage record, Ameren Illinois Company

Measure, Ameren Illinois CompNo eventsAll eventsConverted
SAIDI minutes120.6223.92.01 h
SAIFI interruptions0.9101.1301.10 yr apart
CAIDI minutes132.5198.12.21 h

Territory of Ameren Illinois Company

81 Illinois counties, region SERC:

Counties served by Ameren Illinois CompanyJeffersonLoganDe WittPiattBrownPerryMarshallSchuylerBondCassMoultrieDouglasEffinghamJohnsonBureauMcDonoughMarionMenardStarkWarrenJasperClayRichlandHenryFordKnoxMcLeanClintonPutnamMaconMacoupinPulaskiWayneCumberlandChampaignMontgomeryChristianMadisonLawrenceEdwardsMercerWashingtonWhiteHancockAlexanderClarkSalineMassacVermilionFranklinGallatinPeoriaScottLivingstonJerseyHendersonMorganMasonPikeRandolphUnionWilliamsonWoodfordWabashMonroeIroquoisSt. ClairAdamsLaSalleCrawfordFayetteShelbyJacksonKendallCalhounSangamonGreeneEdgarTazewellColesFulton

Illinois other states: 81 of 81 counties of Ameren Illinois Company drawn

Ameren Illinois Company: 81 counties listed by EIA-861, Census 2023 outlines.

CSV
County list
  • Adams
  • Alexander
  • Bond
  • Brown
  • Bureau
  • Calhoun
  • Cass
  • Champaign
  • Christian
  • Clark
  • Clay
  • Clinton
  • Coles
  • Crawford
  • Cumberland
  • DeWitt
  • Douglas
  • Edgar
  • Edwards
  • Effingham
  • Fayette
  • Ford
  • Franklin
  • Fulton
  • Gallatin
  • Greene
  • Hancock
  • Henderson
  • Henry
  • Iroquois
  • Jackson
  • Jasper
  • Jefferson
  • Jersey
  • Johnson
  • Kendall
  • Knox
  • LaSalle
  • Lawrence
  • Livingston
  • Logan
  • Macon
  • Macoupin
  • Madison
  • Marion
  • Marshall
  • Mason
  • Massac
  • McDonough
  • McLean
  • Menard
  • Mercer
  • Monroe
  • Montgomery
  • Morgan
  • Moultrie
  • Peoria
  • Perry
  • Piatt
  • Pike
  • Pulaski
  • Putnam
  • Randolph
  • Richland
  • Saline
  • Sangamon
  • Schuyler
  • Scott
  • Shelby
  • St Clair
  • Stark
  • Tazewell
  • Union
  • Vermilion
  • Wabash
  • Warren
  • Washington
  • Wayne
  • White
  • Williamson
  • Woodford

Questions on Ameren Illinois Company

How many customers does Ameren Illinois Company serve in Illinois?

1,224,108 accounts in 2024: residential 1,060,894, commercial 162,240, industrial 973.

What is the average residential rate of Ameren Illinois Company?

In 2024 homes paid 11.76 cents; against the Illinois average that is -25.9%.

How reliable is Ameren Illinois Company by SAIDI and SAIFI?

SAIDI 120.6 min and SAIFI 0.91 a year, major events excluded; ratio to the national median 1.21, CAIDI 133 min.

How much solar net metering is on the Ameren Illinois Company grid?

45,577 installations with 648.9 MW, of which residential installations number 40,325.

What is the monthly bill at Ameren Illinois Company for average use?

842 kWh at 11.76 cents comes to about $99, energy only.

How does Ameren Illinois Company rank on price within Illinois?

Rank 1 of 7 in Illinois on price, -25.9% against the state average; 0 charge less than 11.76 ¢.

How much of the Ameren Illinois Company load is business?

Homes take 31.9% of 33,566,359 MWh, commercial accounts 35.4%, industrial and other 32.7%; the 162,240 commercial accounts use 73,263 kWh each, 7.3 times a home.

Does Ameren Illinois Company have smart meters or TOU rates?

1,061,338 of 1,062,170 home meters are AMI, 99.9%. Ameren Illinois Company offers a home time-of-use rate; 146,005 customers use dynamic pricing, 13.76% of its homes.

Since 2015, has Ameren Illinois Company become cheaper than other Illinois utilities?

1st cheapest of 7 in 2015, 1st of 7 in 2024; its price rose 58.2% while Illinois rose 27.0%.

Where does Ameren Illinois Company stand among 2 peers?

Place 1 of 3 on home price at 11.76 ¢ (Ameren group); median 12.56 ¢, cheapest member 11.76 ¢.

Has Ameren Illinois Company filed 2025 data with EIA?

Its latest filing year is 2024, with 121 SAIDI minutes and 11.76 cents for homes.

Utilities with a similar home price

Home prices nearest to Ameren Illinois Company at 11.76 ¢/kWh in 2024, among companies with a page here, any state.

More on Ameren Illinois Company

Rate plans on file

7 home plan records, energy charges: 2.6 to 90.9 ¢/kWh.

Who offers time-of-use and tiered rates (17 Apr 2026 snapshot).

Primary sources for Ameren Illinois Company: 11.76 ¢/kWh for homes, 121 minutes of SAIDI

Share this page

At 842 kWh a month a Ameren Illinois Company home pays about $99 in energy: 11.76 ¢/kWh, 25.9% below the Illinois average of 15.87 ¢.