Potomac Electric Power Co Electricity Rates and Average Bill (Maryland)
Data through August 2026 (the latest month EIA has published) · Updated October 31, 2026
As of August 2026, Potomac Electric Power Co's residential customers in Maryland paid an average effective rate of 25.76¢/kWh with an average monthly bill of $254.49, per EIA Form 861-M data. That rate is 4.4¢ above the Maryland average of 21.40¢/kWh; the U.S. average is 18.16¢/kWh.
Rate trend vs the Maryland average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| September 2025 | 24.05 | 187.20 | 778 |
| October 2025 | 24.58 | 142.97 | 582 |
| November 2025 | 20.21 | 132.53 | 656 |
| December 2025 | 21.14 | 220.85 | 1045 |
| January 2026 | 22.21 | 241.74 | 1089 |
| February 2026 | 21.84 | 217.74 | 997 |
| March 2026 | 22.39 | 178.01 | 795 |
| April 2026 | 22.45 | 138.77 | 618 |
| May 2026 | 22.37 | 142.33 | 636 |
| June 2026 | 27.22 | 220.07 | 809 |
| July 2026 | 25.45 | 273.64 | 1075 |
| August 2026 | 25.76 | 254.49 | 988 |
Potomac Electric Power Co vs Maryland vs the U.S.
| Potomac Electric Power Co | Maryland | U.S. average | |
|---|---|---|---|
| Rate (August 2026) | 25.76¢/kWh | 21.40¢/kWh | 18.16¢/kWh |
| Average monthly bill | $254.49 | $233.47 | $209.23 |
| Average monthly usage | 988 kWh | 1091 kWh | 1152 kWh |
| Rate change, 1 year | +9.3% | +7.6% | +3.4% |
Estimate a bill at Potomac Electric Power Co rates
Worked example: 1,000 kWh at Potomac Electric Power Co's average effective rate of 25.76¢/kWh is about $257.60. The utility's actual average usage is 988 kWh/month, which produces the $254.49 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Maryland rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.