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AES Indiana Rates

Pending cases for AES Indiana - formerly Indianapolis Power & Light Co. (IPL) - include the utility's:

In the most recent IURC survey of residential electric utility rates, AES Indiana's average residential bill ranked third-highest among the electric utilities under IURC jurisdiction.

Base Rates

AES Indiana's most recent base rate case concluded in April 2024. Previous rates were approved in October 2018.

Base rates cover most infrastructure and operating/maintenance costs while rate adjustment “trackers,” as described below, allow for more frequent rate changes for specific costs as designated by law a settlement agreement among the OUCC, the utility, and numerous additional parties.

The utility's prior base rates were approved in 2016. A 2017 rate case was dismissed.


In addition to base rates, Indiana electric utilities recover and credit separate, specific costs through rate adjustment mechanisms known as "trackers." Rate adjustments via trackers are reviewed by the OUCC and approved by the IURC on a quarterly, semi-annual or annual basis.

The trackers were re-set when AES's current base rates were approved in October 2018 and are still subject to adjustments every three, six, or 12 months.

AES Indiana's authorized trackers make up about 12.8% of a residential customer's typical electric bill as of April 2024.

AES Indiana uses the following trackers. All filings are available by entering the cause number in the IURC's Online Services Portal.

TrackerRecovers Costs forFrequencyIURC Cause No.
Fuel Adjustment Clause (FAC)Coal and other fuelsQuarterly38703
Environmental Cost Recovery (ECR)Emissions control equipment (including operations & maintenance)Semi-Annual42170
Demand Side Management (DSM)Energy efficiency programsSemi-Annual43623
Green Power Rider (GPR)Program allowing customers to voluntarily buy renewable energy creditsAnnual44121
Off-System Sales (OSS)Sales to the wholesale power marketAnnual44795
Capacity Adjustment Factor (CAP)Capacity cost recoveryAnnual44795
Regional Transmission Organization (RTO)Participation in Midcontinent Independent System Operator (MISO)Annual44808

Additional Cases of Note

Previous AES Indiana/IPL cases before the IURC include:

  • Rate case (Cause No. 45911)
  • Current fuel adjustment cost (Cause No. 38703 FAC 142)
  • Pike County Energy Storage Project (Cause No. 45920)
  • 2024 Energy Efficiency Plan (Cause No. 45898)
  • Electric vehicle portfolio case (Cause No. 45843)
  • Eagle Valley outage subdocket (Cause No. 38703-FAC133S1)
  • Distributed generation tariff (Cause No. 45504)
  • previous fuel cost factor (Cause No. 38703-FAC137)
  • Harding Street Station solar project (Cause No. 45729)
  • Utility Receipts Tax reduction (Cause No. TD-50543)
  • Distributed generation tariff (Cause No. 45504)
  • Fixed Green Bill proposal (Cause No. 45884)
  • Proposed electric vehicle portfolio (Cause No. 45509)
  • Cost recovery regarding retirements of Petersburg Units 1 & 2 (Cause No. 45502)
  • Financing request (Cause No. 45575)
  • Petersburg Solar project (Cause No. 45591)
  • Hardy Hills Solar project (Cause No. 45493)
  • COVID-19 investigation (Cause No. 45380)
  • Smart Meter opt out tariff (Cause No. 45264-S1)
  • Three-year energy efficiency plan (Cause No. 45370)
  • 2017 Tax Cuts & Jobs Act investigation (Cause No. 45032)
  • Proposed electric car sharing program for Indianapolis (Cause No. 44478)
  • US EPA rule compliance: Petersburg Generating Station (Cause No. 44794)
  • $511 million plan to install new pollution control equipment at Petersburg and Harding Street generating stations (Cause No. 44242)
  • Construction & operation of a new natural gas-fired generating facility in Morgan County, and conversion of two coal-fired generating units (Units 5 & 6) at the Harding Street station to natural gas (Cause No. 44339)
  • Conversion of Harding Street Unit 7 from coal to natural gas (Cause No. 44540).

Sales Taxes

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