Delmarva Power in Delaware: rates, bills and the 2026 increases
Delmarva Power's 278,793 default-service customers in Delaware paid an average of 18.16¢ per kWh in 2025, for an average bill of $161.72 a month on 890 kWh.1 Over the last 12 months (Sep 2025–Aug 2026) the average was 18.98¢, and 20.09¢ in August 2026.2 Another 26,556 homes on its wires (8.7%) buy their supply elsewhere and pay Delmarva Power delivery charges averaging 7.61¢ per kWh, plus their supplier's price.
EIA-861 2025 final (released October 7, 2026) and EIA's monthly utility survey through August 2026 (preliminary); next monthly update expected November 24, 2026. Averages are revenue divided by kWh, all charges included: not the rate printed in a tariff.
3 of 3 Delaware counties served (EIA-861 2025)
Delmarva Power's Standard Offer Service homes in Delaware paid an average of 18.98¢ per kWh over the 12 months September 2025 to August 2026, up from 18.16¢ per kWh1 in 2025. The same company's Maryland customers paid 22.68¢ per kWh over those months, so the Delaware side is the cheaper of the two, but 2026 brought a higher supply price in June and interim distribution rates in July, and the August 20265 average was +11.0%2 against the same month a year earlier.
The average price per kWh, by period
Delmarva Power & Light Company has 305,349 residential customers on its Delaware wires, 65.7% of all homes in Delaware. In 2025, 278,7931 of them also bought their electricity from Delmarva on Standard Offer Service, the default supply for anyone who has not signed with a supplier. Every price below describes that group.
Source: EIA-861 2025, service territory; Census Bureau, Cartographic boundary file, counties. EIA-861 2025 service territory: 3 counties. Counts whole counties even where the utility serves only part of one; check the utility's own service-area map for an address.
Show the numbers
| County | Other utilities reporting service |
|---|---|
| Kent County | Delaware Electric Cooperative, City of Dover, City of Milford, Town of Smyrna, Town of Clayton |
| New Castle County | City of Newark, Town of Middletown, Town of Smyrna, New Castle Municipal Serv Comm |
| Sussex County | Delaware Electric Cooperative, City of Milford, City of Seaford, City of Lewes |
| Period | Delmarva Power, Delaware | Delmarva Power, Maryland | Coverage |
|---|---|---|---|
| 2025, full year | 18.16¢ per kWh | 21.81¢ per kWh1 | EIA-861, final |
| 12 months, September 2025 to August 2026 | 18.98¢ per kWh | 22.68¢ per kWh | EIA-861M, 2026 months preliminary |
| August 20265 only | 20.09¢ per kWh | 23.00¢ per kWh2 | EIA-861M, preliminary |
Each figure is average revenue per kWh: what Standard Offer Service homes were billed in total, delivery and supply together, including the customer charge and riders but not most taxes, divided by the kWh they used. None of them is a tariff line. A home that uses less than average sees a higher figure on its own bill, because the fixed charge is spread over fewer kWh.
In 2025 Delmarva's Delaware average was 5.9% above the Delaware average and 2.1% above the national average for investor-owned utilities. Among the 177 US utilities with 100,000 or more residential customers it ranked 48th highest of 177, against 26th highest of 177 for the company's Maryland side; the median of that group was 15.07¢ per kWh1.
What changed in 2026
The annual average rose from 17.23¢ per kWh6 in 2024 to 18.16¢ per kWh in 2025 (+5.4%), a smaller step than in Maryland, where the company's average went up 7.9%1. The 2026 readings moved faster. In August 2026, the Delaware average of 20.09¢ per kWh was +11.0% on August 2025, while the Maryland side was +6.2%2. For Delaware as a whole the same comparison came to +11.0%, 6th highest5 among the states. These monthly figures are preliminary.
Source: EIA-861M monthly sales and revenue by utility; EIA, Electric Power Monthly / EIA-861M sales and revenue by state. Residential revenue divided by kWh in each month, as reported to EIA's monthly survey (EIA-861M; months since January 2026 preliminary). Bundled (default-service) customers only.
Show the numbers
| Month | Delmarva Power (¢/kWh) | kWh per customer | Bill per customer |
|---|---|---|---|
| January 2025 | 15.96¢ | 1,213 | $193.65 |
| February 2025 | 16.76¢ | 966 | $161.95 |
| March 2025 | 17.97¢ | 867 | $155.88 |
| April 2025 | 19.38¢ | 664 | $128.63 |
| May 2025 | 19.18¢ | 627 | $120.31 |
| June 2025 | 19.04¢ | 892 | $169.80 |
| July 2025 | 17.49¢ | 1,227 | $214.73 |
| August 2025 | 18.10¢ | 993 | $179.69 |
| September 2025 | 19.51¢ | 793 | $154.71 |
| October 2025 | 19.54¢ | 584 | $114.11 |
| November 2025 | 20.04¢ | 690 | $138.32 |
| December 2025 | 17.86¢ | 1,169 | $208.73 |
| January 2026 | 17.11¢ | 1,157 | $197.92 |
| February 2026 | 17.34¢ | 1,089 | $188.80 |
| March 2026 | 18.78¢ | 923 | $173.32 |
| April 2026 | 20.08¢ | 658 | $132.19 |
| May 2026 | 20.34¢ | 674 | $137.05 |
| June 2026 | 20.29¢ | 887 | $179.87 |
| July 2026 | 18.99¢ | 1,151 | $218.59 |
| August 2026 | 20.09¢ | 1,065 | $213.95 |
Two decisions sit inside those months. The state's Division of the Public Advocate announced in April 2026 that Delmarva's Standard Offer Service supply price would rise from June 1, 2026; according to the Public Advocate, Delmarva earns no profit on the supply itself. Separately, Delmarva filed for higher distribution rates on December 9, 2025. In an interim order dated July 1, 2026 the Delaware Public Service Commission let part of the requested increase take effect as interim rates on July 9, 2026 (half of the requested increase beyond the infrastructure surcharge revenue it already collects, plus that revenue), subject to refund, with a larger second interim step on December 9, 2026 unless it rules on the case before then. The final decision on the rate case is still to come, and EIA's monthly data stop at August 2026, before the second step.
EIA's next monthly release, with September 2026 data, is due November 24, 2026. The guide to rate cases explains how interim rates and final orders reach a bill.
Use peaks in December
Delmarva's Delaware homes used 890 kWh a month on average in 2025, almost the same as the 884 kWh of 2024, so the bill rose with the price: from $152.266 to $161.72 (+6.2%1). Over the 12 months September 2025 to August 2026 the average bill was $171.49 for 903 kWh2.
The heaviest month was in winter, not summer. Use per home went from 584 kWh in October 2025 to 1,169 kWh in December 2025, and the average bills in those two months were $114.11 and $208.732.
Source: EIA-861M monthly sales and revenue by utility. kWh per residential customer in each month (EIA-861M; months since January 2026 preliminary). The table adds the average bill and price for the month.
Show the numbers
| Month | kWh per customer | Bill per customer | ¢/kWh |
|---|---|---|---|
| September 2025 | 793 | $154.71 | 19.51¢ |
| October 2025 | 584 | $114.11 | 19.54¢ |
| November 2025 | 690 | $138.32 | 20.04¢ |
| December 2025 | 1,169 | $208.73 | 17.86¢ |
| January 2026 | 1,157 | $197.92 | 17.11¢ |
| February 2026 | 1,089 | $188.80 | 17.34¢ |
| March 2026 | 923 | $173.32 | 18.78¢ |
| April 2026 | 658 | $132.19 | 20.08¢ |
| May 2026 | 674 | $137.05 | 20.34¢ |
| June 2026 | 887 | $179.87 | 20.29¢ |
| July 2026 | 1,151 | $218.59 | 18.99¢ |
| August 2026 | 1,065 | $213.95 | 20.09¢ |
Next to the cooperative and the municipal utilities
Of the 4 utilities with 10,000 or more Standard Offer or full-service residential customers, its 2025 average was 2nd highest. Delaware Electric Cooperative, which reports customers in Kent County and Sussex County3, averaged 13.89¢ per kWh, the lowest of the group, and City of Newark's municipal utility the highest at 19.75¢ per kWh. Across Delaware's public power utilities the average was 16.92¢ per kWh1.
Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.
Show the numbers
| Utility | average residential price (bundled customers) |
|---|---|
| Delaware Electric Cooperative (DE) | 13.89¢ |
| City of Dover (DE) | 16.16¢ |
| Town of Middletown (DE) | 16.64¢ |
| Delmarva Power (DE) | 18.16¢ |
| City of Newark (DE) | 19.75¢ |
The gap with the cooperative was wider in the latest 12 months: 14.31¢ per kWh at the cooperative over the 12 months September 2025 to August 2026, against 18.98¢ per kWh2 at Delmarva. Its members use more electricity per home, though (1,054 kWh a month in 2025), so its average bill of $146.371 was closer to Delmarva's than the prices suggest.
Delmarva reported customers in all 3 Delaware counties in 2025 (Kent County, New Castle County and Sussex County3), and in each of them at least one other utility also reported service. A home's address on the utilities' own service maps decides which one delivers there; a town name or ZIP code is not enough.
One company, two state averages
Delmarva Power also serves 103 Maryland counties, from Cecil and Harford to the lower Eastern Shore, under the Maryland Public Service Commission and its own Maryland tariff. The Delaware customers paid less per kWh in 2025 (18.16¢ per kWh against 21.81¢ per kWh) and used less (890 kWh a month against 981 kWh), so their average bill was much lower: $161.72 against $214.051. Maryland's peak came a month later, in January 2026, at $344.512.
Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.
Show the numbers
| Utility | average monthly residential bill |
|---|---|
| Delaware Electric Cooperative (DE) | $146.37 |
| Delmarva Power (DE) | $161.72 |
| Atlantic City Electric (NJ) | $164.27 |
| Pepco (MD) | $181.58 |
| Delmarva Power (MD) | $214.05 |
The Maryland Delmarva Power page covers that side in detail.
Customers with a supplier: delivery charges only
26,556 Delaware homes on Delmarva's wires, 8.7% of its residential customers, bought their supply from a licensed supplier in 2025. Delmarva billed them only for delivery, which EIA reports separately: 7.61¢ per kWh on average (+6.1% on 7.17¢ per kWh6 in 2024), or $64.01 a month for 841 kWh. On Delmarva's Maryland wires the delivery-only average was 9.06¢ per kWh1.
Source: EIA-861 annual electric power industry report, 2025 final. Delivery charges only: what the utility billed customers who buy supply elsewhere, divided by their kWh. Not comparable with bundled prices.
Show the numbers
| Utility | delivery-only revenue per kWh (residential) |
|---|---|
| Delmarva Power (DE) | 7.61¢ |
| Delmarva Power (MD) | 9.06¢ |
| Pepco (MD) | 9.21¢ |
| Atlantic City Electric (NJ) | 10.58¢ |
What Delaware homes with a supplier paid for the electricity itself averaged 15.72¢ per kWh1 in 2025, across all suppliers and contracts: a past average, not an offer. Delivery-only, supply-only and Standard Offer Service figures cover different customers and different parts of the bill, so they are listed side by side and never added. The Delaware page sets Delmarva's figures against the rest of the state.
Peak-day credits, smart meters and rooftop solar
Delmarva reported 262,638 Delaware residential customers in a time-varying program in 2025, 86.0% of homes on its wires, against 68.8% on its Maryland side. EIA lists the program as critical peak rebates: customers keep their usual rate and earn a bill credit for cutting use during peak events the utility calls; nothing is added for using power then. Advanced meters (100.0%7 of residential meters) measure the reductions. The time-of-use guide sets out how rebates differ from time-of-use pricing.
Homes on Delmarva's Delaware system had 10,518 net-metered rooftop solar installations in 2025, 34.4 per 1,000 residential customers, with 83.9 megawatts of capacity. The cooperative's figure was 30.67 per 1,000.
Outages: fewer interruptions, slightly longer total
Counting major events, a Delmarva customer in Delaware was without power for 104 minutes on average in 2025, more than the Delaware average of 99 minutes, and 76 minutes with major event days excluded (IEEE 1366). Interruptions were less frequent than the state average: 0.78 per customer, against 1.28 across Delaware. Delaware's statewide outage minutes ranked 4th lowest8 among the states.
Businesses and help with bills
Delmarva's commercial customers in Delaware paid 16.14¢ per kWh on average in 2025 and its 31 industrial accounts 7.35¢ per kWh; across every customer class the average was 17.67¢ per kWh1.
Delaware received $14.0 million9 in federal LIHEAP funds for fiscal 2026. The guide to help paying an electric bill lists the programs open to households.
Delmarva Power Delaware: common questions
What is Delmarva Power's rate per kWh in Delaware?
There is no single rate: the tariff combines a monthly customer charge, distribution charges, the Standard Offer Service supply charge and riders. Spread over every kWh sold to residential Standard Offer Service customers, they averaged 18.16¢ per kWh1 in 2025, 18.98¢ per kWh over the 12 months September 2025 to August 2026 and 20.09¢ per kWh2 in August 20265 alone. Months from January 2026 on are preliminary.
How much is the average Delmarva Power bill in Delaware?
$161.72 a month in 2025 for 890 kWh1, against $152.266 in 2024. Over the 12 months September 2025 to August 2026 it averaged $171.49, from $114.11 in October 2025 to $218.59 in July 20262.
Is Delmarva Power raising rates in 2026?
Two changes took effect in 2026. The Standard Offer Service supply price rose from June 1, and interim distribution rates, subject to refund, from July 9 while the Delaware Public Service Commission decides Delmarva's base rate case. A second interim step is scheduled for December 9, 2026 unless the Commission issues its final order first.
Can I choose a different electricity supplier in Delaware?
Yes. Delmarva Power still delivers the electricity and bills for delivery, but the supply can come from a licensed supplier. In 2025, 8.7%1 of Delmarva's Delaware residential customers bought supply that way.
Related pages
Sources
- EIA-861 annual electric power industry report, 2025 final; table Sales_Ult_Cust_2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861M monthly sales and revenue by utility; table sales_ult_cust_2025 and _2026; released October 23, 2026. www.eia.gov
- EIA-861 2025, service territory; table Service_Territory_2025; 2025, final; released October 7, 2026. www.eia.gov
- Census Bureau, Cartographic boundary file, counties; table cb_2025_us_county_5m; cb_2021_us_county_5m; 2025 (2021 for Connecticut). www.census.gov
- EIA, Electric Power Monthly / EIA-861M sales and revenue by state; table sales_revenue.xlsx (EPM Table 5.6.A); January 2001 to 2026-08; months since January 2026 preliminary; released October 23, 2026. www.eia.gov
- EIA-861 annual electric power industry report, 2024 final; table Sales_Ult_Cust_2024; 2024, final (file updated December 3, 2025); released December 3, 2025. www.eia.gov
- EIA-861 2025, advanced meters, dynamic pricing and net metering; table Advanced_Meters, Dynamic_Pricing, Net_Metering 2025; 2025, final; released October 7, 2026. www.eia.gov
- EIA-861 2025, reliability; table Reliability_2025; 2025, final; released October 7, 2026. www.eia.gov
- HHS, LIHEAP funding releases to states; table FY2027 first release; FY2026 final; FY2027 first release (October 9, 2026); FY2026 total; released October 9, 2026. acf.gov
How every figure is built: methodology. Found an error? Write to [email protected]; corrections are listed on the updates page.