Potomac Electric Power Co. electricity rates
Investor-owned utility · Maryland
Potomac Electric Power Co. is a for-profit, investor-owned utility regulated by the state utility commission, serving 531,090 homes in Maryland. Its residential customers pay an average of 23.12¢/kWh including fixed and delivery charges, 29% more than the U.S. average.
Rate basis: EIA-861M monthly utility data, 12 months ending 2026-07.
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Potomac Electric Power Co. bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $115.60 | $38.67 |
| 1,000 kWh | $231.20 | $75.32 |
| 1,500 kWh | $346.80 | $111.97 |
| 2,000 kWh | $462.40 | $148.63 |
*Residential Apartments-Master Meter-Schedule MMA (effective 2025-08-01, $2.01/month customer charge), energy and fixed charges from the OpenEI Utility Rate Database. Riders, fuel adjustments and taxes are often billed separately, so real bills usually land closer to the all-in column. Calculate your bill.
Potomac Electric Power Co. residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| Residential Apartments-Master Meter-Schedule MMA | 2025-08-01 | $2.01 | 7.33¢ |
| Residential Apartments-Master Meter-Schedule MMAtime-of-use | 2025-08-01 | $2.01 | 7.3¢ (12am–12am) — summer weekdays |
| Residential - Schedule Rtime-of-use | 2025-08-01 | $17.09 | 3.4¢ (12am–12am) — summer weekdays |
| Residential - Schedule Rtime-of-use | 2025-08-01 | $17.09 | 3.4¢ (12am–12am) — summer weekdays |
| PLUG-IN VEHICLE CHARGING - SCHEDULE "PIV" (Closed to new customers)time-of-use | 2019-08-12 | — | 11.4¢ (12am–2pm, 7pm–12am) · 19.1¢ (2pm–7pm) — summer weekdays |
| Residential All - Electric Service - Schedule AEtime-of-use | 2017-06-01 | $15.25 | 1.4¢ (12am–12am) — summer weekdays |
| Residential Apartments -All Electric Service (Schedule AE)time-of-use | 2017-06-01 | $12.50 | 1.4¢ (12am–12am) — summer weekdays |
| Residential Time Metered - Schedule RTMtime-of-use | 2017-06-01 | $17.52 | 12.7¢ (12am–8am) · 13.1¢ (8am–12pm, 8pm–12am) · 14.1¢ (12pm–8pm) — summer weekdays |
| Residential Aid Discount - Schedule RADtime-of-use | 2017-06-01 | $15.31 | 1.1¢ (12am–12am) — summer weekdays |
| Residential Time Metered - Schedule RTM | 2017-06-01 | $17.52 | 9.67¢ |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Potomac Electric Power Co. rate history
2015–2025: +54% change in the average residential rate (14.16¢ → 21.74¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2025 | Potomac Electric Power Co. | Maryland avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 104 | 178 | 266 |
| Outages per customer (SAIFI) | 0.74 | 0.96 | 1.34 |
| Average restoration time (CAIDI) | 2 hr 20 min | — | — |
| Outage minutes excluding major storms | 54 | 79 | 121 |
Outages in counties served (2025)
From ORNL EAGLE-I, which tracks customers without power every 15 minutes. These counts cover every utility in each county. Weighted across Potomac Electric Power Co.'s counties, customers averaged 2 hr 60 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Prince Georges | 186 | 24 | 29,631 | 2025-06-19 |
| Montgomery | 175 | 38 | 29,030 | 2025-06-19 |
Potomac Electric Power Co. service area
Potomac Electric Power Co. serves 2 counties in Maryland and 120 ZIP codes.
Montgomery, Prince Georges
Cities: Germantown, Silver Spring, Gaithersburg, Rockville, Bethesda, Bowie, Aspen Hill, Wheaton, Potomac, North Bethesda, Clinton, Oxon Hill-Glassmanor, Olney, Suitland-Silver Hill, Chillum, College Park, Montgomery Village, Laurel, Suitland, North Potomac, Greenbelt, Fort Washington, Fairland, Landover, Camp Springs, Langley Park, Greater Upper Marlboro, Hyattsville, Lanham-Seabrook, Calverton, Oxon Hill, Takoma Park, White Oak, Glassmanor, Seabrook, Beltsville, Hillcrest Heights, East Riverdale, Cloverly, Adelphi
Programs, smart meters & solar
| Smart meters (AMI) for homes | 100% |
| Time-based rate programs | Peak-time rebates |
| Homes on time-based rates | 395,081 |
| Net-metered solar homes | 46,099 |
| Homes in demand response (e.g. thermostat rebates) | 269,749 |
| Residential efficiency incentives paid (2025) | $22,402,000 |
| Residential energy saved by programs | 72,730 MWh |
Potomac Electric Power Co. at a glance
| Ownership | Investor-owned utility |
| Services | — |
| Commercial rate | 17.81¢/kWh |
| Industrial rate | 21.01¢/kWh |
| Retail revenue (2025) | $1,407,950,900 |
| Electricity sold (2025) | 6,842,519 MWh |
| Balancing authority | PJM |
| EIA utility ID | 15270 |
Other utilities in Maryland
Frequently asked questions
What is Potomac Electric Power Co.'s electricity rate?
Potomac Electric Power Co. residential customers pay an average of 23.12¢ per kWh, all charges included (EIA-861M monthly utility data, 12 months ending 2026-07). That's 10% above the Maryland average of 21.03¢ and 29% above the U.S. average.
What is the average Potomac Electric Power Co. electric bill?
About $193 a month. The average Potomac Electric Power Co. home uses 835 kWh a month. At 1,000 kWh the bill would be about $231.
How many customers does Potomac Electric Power Co. have?
Potomac Electric Power Co. serves 531,090 residential customers and 608,566 customers in total in Maryland, across 2 counties.
How reliable is Potomac Electric Power Co.?
In 2025, the average Potomac Electric Power Co. customer was without power for 104 min (SAIDI) over 0.74 interruptions (SAIFI), including major storms. Excluding major event days it was 54 min. The Maryland average was 2 hr 58 min and the U.S. average 4 hr 26 min.
Does Potomac Electric Power Co. offer time-of-use rates?
Yes. The OpenEI rate database lists 8 time-of-use residential plans, including Residential Apartments-Master Meter-Schedule MMA. Running big appliances off-peak can cut their cost. Pick the plan in the calculator above to see by how much.
Does Potomac Electric Power Co. offer net metering for solar?
Potomac Electric Power Co. had 46,099 residential net-metered customers in 2025 with 340.3 MW of capacity. Estimate solar savings at this utility's rate.
Sources: EIA-861 2025 and EIA-861M (through July 2026), OpenEI URDB, ORNL EAGLE-I, U.S. Census. Methodology. Spot an error? Rates change often, so confirm with Potomac Electric Power Co. before making decisions.