Pennsylvania · Retail Power Marketer
Interstate Gas Supply, Inc.
12.95¢ per kWh, energy only, EIA-861 2025. Average bill $106.05 at 818.8 kWh a month, across 69,442 customers on that row.
Pennsylvania averaged 19.29¢/kWh and $161.90 a month. The United States averaged 17.23¢/kWh and $150.68. State and national figures come from EIA's Average Bill file.
Revenue divided by sales, EIA-861 Sales to Ultimate Customers, 2025, released October 7, 2026. Texas wires utilities come from the Delivery Companies file. The price and bill use energy only service. Customer count: 69,442, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$129.50
12.95¢/kWh × 1,000 kWh. Energy only residential average, EIA-861 2025. The customer charge is already folded into this average, so it stands beside a tariff total rather than being added to it.
Annual history
| Year | ¢/kWh | Avg. bill | Avg. kWh | Customers |
|---|---|---|---|---|
| 2015 | — | — | — | — |
| 2016 | 8.21¢ | $63.35 | 771.3 | 48,656 |
| 2017 | 7.55¢ | $61.04 | 808.4 | 75,090 |
| 2018 | 7.27¢ | $82.19 | 1,129.9 | 117,456 |
| 2019 | 8.76¢ | $91.02 | 1,038.5 | 80,265 |
| 2020 | 8.68¢ | $84.95 | 978.7 | 68,884 |
| 2021 | 9.45¢ | $92.40 | 977.5 | 56,685 |
| 2022 | 13.48¢ | $122.91 | 911.6 | 45,322 |
| 2023 | 14.45¢ | $113.21 | 783.3 | 46,351 |
| 2024 | 12.89¢ | $99.54 | 772.4 | 53,472 |
| 2025 | 12.95¢ | $106.05 | 818.8 | 69,442 |
EIA-861, 2015–2025, using the same service type as the 2025 figure. A blank year means that service was not in the file.
Counties
EIA's 2025 service-territory file does not list counties for this utility.
EIA-861 Service Territory, 2025. A listed county is the county EIA recorded. It does not mean every address in the county is served. Open this utility in the bill calculator · Rate history tool