States › Missouri › Union Electric Co

investor-owned utility · EIA utility 19436

Union Electric Co

1,095,619 residential customers in Missouri · 65 counties in territory · balancing authority MISO

Form EIA-861, 2024 finalMonthly to Jul 2026

Average residential price, 2024. Dial position: 36% of 1,230 US utilities had this price or lower. Ticks: Missouri and US averages.

Average price is revenue divided by sales for the sector and year; it is not a tariff rate. Reliability figures are as reported by utilities to EIA on Form 861 and may use different calculation methods. Annual figures: Form EIA-861 for 2024, final release. Monthly state figures run to July 2026.

In its Form EIA-861 filing for 2024, Union Electric Co, an investor-owned utility, reported 1,095,619 residential customers in Missouri, with a service territory that touches 65 counties.

Its average residential price that year was 12.56¢ per kilowatthour, about the same as the Missouri average of 12.91¢ and 24% below the US average of 16.48¢. The figure is residential revenue divided by residential sales, so it folds in fixed charges, riders and every rate schedule the utility bills under.

That works out to an average residential bill of $124.23 a month on average use of 989 kWh a month. Across Missouri the average bill was $129.18 on 1,001 kWh, so a bill gap reflects how much power households use as well as what each kilowatthour costs.

For reliability it reported a SAIDI of 148.0 minutes per customer with major event days included and 94.0 minutes with them excluded, calculated under IEEE 1366 standard. The median among Missouri utilities reporting was 157.6 minutes with major event days; this utility's figure is 6.1% below that median.

The average price is up 21.0% on 2019, against up 15.9% for Missouri as a whole, and up 2.3% on 2023.

12.56¢average residential price per kWhMissouri 12.91¢ · US 16.48¢

$124.23average monthly residential billon 989 kWh a month

1,095,619residential customers1,264,469 customers in all sectors

148.0SAIDI minutes per customer, all eventsMissouri median 157.6

Compared with Missouri, the US and other investor-owned utilities

Measure, 2024	This utility	Investor-owned utilities, US median	Missouri	United States
Average residential price per kWh	12.56¢	16.17¢	12.91¢	16.48¢
Average monthly residential bill	$124.23	$131.47	$129.18	$142.26
Average monthly use, kWh	989	787	1,001	863
Residential price change, 1 year	+2.3%	—	+2.6%	+3.0%
Residential price change, 5 years	+21.0%	—	+15.9%	+26.7%
SAIDI, all events (minutes)	148.0	278.7	157.6 median	184.5 median
SAIDI, without major event days	94.0	106.5	97.0 median	99.8 median

State and US prices, bills and use are EIA's own averages over every customer. The ownership column and the reliability columns are medians across utilities with at least 1,000 residential customers, computed on this site from the final 2024 file. Among the 4 filings by investor-owned utilities in Missouri, the median price was 13.14¢. In Missouri this utility's price ranks 26 of 44, counting from the highest.

Average price by year

Union Electric CoMissouri averageUS average

Cents per kWh, nominal.

Year by year

Year	¢ per kWh	Missouri ¢	Monthly bill	kWh a month	Residential customers	All sales
2024	12.56¢	12.91¢	$124.23	989	1,095,619	30.8 TWh
2023	12.28¢	12.58¢	$120.48	981	1,087,971	30.3 TWh
2022	11.34¢	11.74¢	$121.30	1,069	1,082,243	31.9 TWh
2021	10.81¢	11.41¢	$111.58	1,032	1,077,436	31.1 TWh
2020	10.35¢	11.22¢	$106.62	1,030	1,071,999	30.6 TWh
2019	10.38¢	11.14¢	$109.67	1,057	1,066,035	32.1 TWh
2018	10.90¢	11.34¢	$122.60	1,124	1,060,493	33.7 TWh
2017	11.19¢	11.63¢	$111.89	1,000	1,053,590	31.6 TWh
2016	10.73¢	11.21¢	$113.02	1,054	1,047,640	32.9 TWh
2015	11.34¢	11.21¢	$116.87	1,030	1,043,603	35.9 TWh
2014	10.38¢	10.64¢	$113.42	1,093	1,041,094	37 TWh
2013	10.53¢	10.60¢	$114.51	1,088	1,038,936	37 TWh

Bundled residential service only in the price, bill and use columns. Bill = residential revenue ÷ customers ÷ 12; use = residential sales ÷ customers ÷ 12.

Month by month

Union Electric CoMissouri average

Form EIA-861M monthly sample, bundled residential service in Missouri. Preliminary until EIA finalises the year. Latest: 18.34¢ in July 2026, average bill $249.06 on 1,358 kWh.

Sales by sector, 2024

Sector	Customers	Sales	Share of sales	Revenue	¢ per kWh, bundled
Residential	1,095,619	13 TWh	42%	$1,633,293,900	12.56¢
Commercial	165,295	13.6 TWh	44%	$1,327,351,000	9.73¢
Industrial	3,554	4.1 TWh	13%	$311,205,800	7.60¢
Transportation	1	23 GWh	0%	$2,234,700	—

Customers, sales and revenue count every service type the utility reported (bundled, energy-only and delivery-only). The price column uses bundled service alone, because part-bill revenue would understate it. Sources of energy: 36.1 TWh in total, of which 88.8% was its own net generation and 4.1 TWh was bought wholesale; summer peak demand 7,199 MW.

Reliability

SAIDI, all events148 min

SAIDI, without major event days94 min

Minutes of sustained interruption per customer in 2024, as the utility reported them under IEEE 1366 standard. SAIFI: 0.77 interruptions per customer with major event days, 0.67 without; CAIDI 192.2 minutes per interruption. EIA's Missouri total across all reporting utilities was 224.3 minutes with major event days and 106.0 without. Major event days are storms and similar events that a utility's chosen method sets apart; methods differ, so treat comparisons as approximate. What SAIDI and SAIFI mean.

Year	SAIDI, all events	SAIDI, no major events	SAIFI, all events	SAIFI, no major events	Method
2024	148.0	94.0	0.77	0.67	IEEE 1366
2023	480.0	93.0	1.18	0.67	IEEE 1366
2022	151.0	92.0	0.92	0.73	IEEE 1366
2021	293.0	90.0	1.02	0.69	IEEE 1366
2020	155.0	86.0	0.86	0.71	IEEE 1366
2019	181.0	106.0	1.13	0.90	IEEE 1366
2018	140.0	86.0	0.85	0.72	IEEE 1366
2017	244.0	85.0	1.04	0.68	IEEE 1366
2016	294.0	91.0	1.13	0.73	IEEE 1366
2015	114.0	96.0	0.82	0.77	IEEE 1366
2014	133.0	89.0	0.97	0.81	IEEE 1366
2013	371.0	88.0	0.99	0.70	IEEE 1366

Generation at plants it operates, 2025

Coal 64.1% 20.7 TWh
Nuclear 22% 7.1 TWh
Hydro 4.5% 1.5 TWh
Wind 4.1% 1.3 TWh
Solar 3.2% 1 TWh
Natural gas 2% 641.7 GWh
Petroleum 0.1% 19 GWh

Net generation of 32.3 TWh at power plants this utility operates, from Form EIA-923. It is not the mix delivered to customers: utilities also buy power wholesale (4.1 TWh in 2024), sell generation to others and may co-own plants that another company operates.

Counties in its service territory

Counties the utility listed on Form EIA-861 for 2024. Listing a county does not mean the utility serves all of it.

Other utilities in Missouri

Utility	Ownership	Residential customers	¢ per kWh	Monthly bill	SAIDI, all events	SAIDI, no major events
Evergy Metro	Investor-owned	518,415	13.41¢	$118.05	364.1	83.5
Evergy Missouri West	Investor-owned	305,583	12.55¢	$122.68	306.2	118.8
Empire District Electric Co	Investor-owned	159,663	14.85¢	$149.71	267.8	137.2
City Utilities of Springfield	Municipal	105,029	11.47¢	$96.00	65.3	65.3
Cuivre River Electric Coop Inc	Cooperative	72,974	11.07¢	$140.15	132.9	132.9
City of Independence	Municipal	53,832	15.74¢	$132.43	330.9	35.5
City of Columbia	Municipal	45,651	13.94¢	$109.33	34.6	34.6
Southwest Electric Coop, Inc	Cooperative	41,386	11.99¢	$124.23	246.0	183.7

All Missouri utilities · Investor-owned utilities nationwide

Questions and answers

How much does electricity cost from Union Electric Co?

Residential customers paid an average of 12.56¢ per kilowatthour in 2024. EIA derives this by dividing residential revenue by residential sales; it is an average across all rate schedules and charges, not a tariff rate.

How does that compare with Missouri?

The Missouri average residential price in 2024 was 12.91¢ and the US average 16.48¢; Union Electric Co was about the same as the state figure. Among 44 utility filings with a bundled residential price in Missouri, it had the 26th highest.

What is the average Union Electric Co bill?

$124.23 a month in 2024, on average residential use of 989 kWh a month (annual revenue and sales divided by customers and by twelve). The Missouri average was $129.18 on 1,001 kWh.

How reliable is Union Electric Co service?

It reported 148.0 minutes of interruption per customer (SAIDI) including major event days and 94.0 minutes excluding them, with 0.77 interruptions per customer (SAIFI) in 2024. Utilities calculate these under differing methods, so comparisons are approximate.

Is the Union Electric Co price rising?

The average residential price was up 2.3% in 2024 compared with 2023 and up 21.0% compared with 2019.

Which counties does Union Electric Co serve?

Its Form EIA-861 service territory lists 65 counties, including Adair County, MO, Audrain County, MO, Bollinger County, MO, Boone County, MO, Butler County, MO and Caldwell County, MO. A county can appear in several utilities' territories.

Provenance

Source: U.S. Energy Information Administration. Annual figures are from Form EIA-861 (sales to ultimate customers, reliability, operational data and service territory files), final release for 2024, respondent "Union Electric Co - (MO)", utility number 19436. Monthly utility figures are from the Form EIA-861M sample. State and US averages are from the Form EIA-861M sales and revenue workbook, published through July 2026. Generation by fuel is from Form EIA-923, 2025 final. All are US government works in the public domain. Page built 1 Oct 2026. Errors in processing are corrected at the next build; see corrections. For tariffs and rate schedules, consult the utility or the state utility commission.