Maryland · EIA utility 58957 · Energy supplier
Interstate Gas Supply, Inc. electricity rates in Maryland, 2025
Interstate Gas Supply, Inc.’s 280 residential customers paid an average of 12.30¢ per kWh in 2025, 37% below the Maryland average of 19.53¢. The typical home used 1,036 kWh a month, for an average bill of $127.
- 12.30¢avg ¢/kWh (2025)+0.05¢ (+0.4%) vs 2024
- $127Avg monthly billMaryland: $184
- 1,036 kWhAvg monthly useMaryland: 944 kWh
- 280Residential customersEnergy supplier
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 280 | 3,480 | $428,000 | 12.30¢ | 12.25¢ | +0.05¢ (+0.4%) |
| Commercial | 762 | 49,545 | $4,941,000 | 9.97¢ | 7.90¢ | +2.08¢ (+26.3%) |
| Industrial | 0 | 0 | $0 | n/a | n/a | n/a |
| All sectors | 1,042 | 53,025 | $5,369,000 | 10.13¢ | 8.59¢ | +1.54¢ (+17.9%) |
How Interstate Gas Supply, Inc. compares
- Maryland residential average, 2025: 19.53¢ per kWh, 944 kWh a month, $184 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Latest monthly figure: Maryland homes paid 21.40¢ per kWh in August 2026 (preliminary), against 19.89¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average rose 0.4%; the state average rose 9.3%.
- Interstate Gas Supply, Inc. is a retail energy provider that sells electricity supply in a state with retail choice. Balancing authority: PJM.
Maryland energy suppliers with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| XOOM Energy Maryland, LLC | 11.44¢ | $107 | 2,533 |
| Constellation NewEnergy, Inc | 11.79¢ | $107 | 44,070 |
| WGL Energy Services, Inc. | 12.05¢ | $94 | 14,898 |
| Rushmore Energy, LLC | 12.14¢ | $103 | 1,151 |
| Reliant Energy Northeast LLC | 12.28¢ | $109 | 5,678 |
| Titan Gas LLC | 12.36¢ | $104 | 2,241 |
| Stream Energy Maryland, LLC | 12.63¢ | $127 | 1,125 |
| SFE Energy Maryland, Inc. | 13.35¢ | $95 | 3,177 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.