Duke Energy Rates

Base Rates | Trackers | Sales Taxes

Duke Energy’s residential electric rates rank third-highest among the electric utilities the IURC regulates, as of July 1, 2017 *.

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 make up about 62 percent of a typical Duke Energy residential bill.

Duke Energy Indiana's base rates were approved in May 2004, in cause number 42359.

To view the rate case's public file, please click here.


In addition to base rates, Duke Energy 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.

Duke Energy is authorized to use a number of electric trackers, listed in the chart below. They make up about 38 percent of a residential customer’s typical bill.

Of particular note:

Tracker Recovers Costs for Frequency IURC Cause No.
Fuel Adjustment Clause (FAC) Coal and other fuels Quarterly 38707
Environmental Cost Recovery (ECR) Emissions control equipment (including operations & maintenance) Semi- Annual 42061
Integrated Gasification Combined Cycle (IGCC) Construction and financing for IGCC facility at Edwardsport, Ind. Annual 43114
Transmission, Distribution, & Storage System Charge (TDSIC) Projects in 7-year infrastructure plan Semi-Annual 44720
Demand Side Management (DSM) Energy efficiency programs Annual 43955
Summer Reliability Adjustment (SRA) Capacity resources needed for system reliability Annual 44348
Regional Transmission Operator (RTO) Participation in Midwest Independent Transmission System Operator (MISO) Quarterly 42736
Federally Mandated Cost Adjustment (FMCA) Critical Infrastructure Protection Semi-Annual  44367
Renewable Energy Project Rider Renewable Energy Projects Annual 44932

To view the IURC public files in tracker cases, click here and enter the appropriate cause number.

Sales Taxes

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

For information on Duke Energy's proposed advanced metering opt-out tariff, please click here.

* Rankings and examples refer to monthly usage of 1,000 kWh in the IURC’s 2017 Residential Bill Survey.