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NIPSCO Electric Rates

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Base Rates | Trackers | Sales Taxes

Northern Indiana Public Service Company’s (NIPSCO’s) residential electric rates ranked second-highest among the utilities the IURC regulates as of July 1, 2018. *

Major components in a typical electric bill include base rates, trackers, and sales taxes.

Base Rates

Base rates cover most of a utility’s operating and maintenance costs. They made up about 91 percent of a typical NIPSCO residential electric bill as of July 1, 2018.

NIPSCO filed an electric rate case (IURC Cause No. 45159) on October 31, 2018. For more information, click here.

Current base rates for NIPSCO's electric utility were approved on July 18, 2016. For more information, please click here

NIPSCO's previous electric base rates were approved in 2011. The OUCC's December 2011 news release offers a summary. The 2011 order resolved issues that were raised in NIPSCO’s previous electric rate case. The OUCC’s May 2009 news release summarizes the agency’s testimony.

For information on NIPSCO's pending wind energy requests, please click here.


In addition to base rates, NIPSCO and other electric utilities recover and credit separate, specific costs through rate adjustment mechanisms known as "trackers." The OUCC reviews all tracker rate adjustments in IURC cases on a regular basis.

NIPSCO is authorized to use 7 electric trackers. They made up approximately 9 percent of a residential customer’s typical bill as of July 1, 2018.

Of particular interest, the IURC has approved a settlement agreement among NIPSCO, the OUCC, and additional parties on the utility's proposed 7-year plan for infrastructure improvements, including approval of a new tracker to recover the costs. The tracker is known as the Transmission, Distribution, and Storage System Improvement Charge (TDSIC) and received legislative approval in 2013.

Additional cases of note include energy efficiency programs and NIPSCO's proposed Coal Combustion Residuals compliance project.

Tracker Recovers Costs for Frequency IURC Cause No.
Fuel Adjustment Clause (FAC) Coal and other fuels Quarterly 38706
Transmission, Distribution & Storage System Improvement Charge (TDSIC) Projects in 7-year infrastructure plan Semi-Annual 44733
Environmental Cost Recovery (ECR) Emissions control equipment (including operations & maintenance) Semi-Annual 42150
Demand Side Management (DSM) Energy efficiency programs Annual 43618
Resource Adequacy Adjustment (RA) Capacity resources needed for system reliability Semi-Annual 44155
Regional Transmission Operator (RTO) Participation in Midcontinent Independent Transmission System Operator (MISO) Semi-Annual 44156
Federally Mandated Cost Adjustment (FMCA) Critical infrastructure protection Semi-Annual 44340
Green Power Rider (GPR)

Program allowing customers to voluntarily buy renewable energy credits

Annual 44198

To view the IURC's files for tracker cases, click here and enter the appropriate cause number.

Sales Taxes

The seven percent state sales tax applies to all Indiana electric utilities.


* Rankings and examples refer to monthly usage of 1,000 kWh in the IURC’s 2018 Residential Bill Survey.