Pending cases for AES Indiana - formerly Indianapolis Power & Light Co. (IPL) - include the utility's:
- Rate Case (IURC Cause No. 46258)
- Quarterly Fuel Cost Adjustments (For the latest case file, click here and enter Cause Number 38703)
- Trackers under its approved 7-year infrastructure plan (IURC Cause No. 45264)
In the most recent IURC survey of residential electric utility rates, AES Indiana's average residential bill ranked fourth-highest among the electric utilities under IURC jurisdiction.
Base Rates
AES Indiana is seeking a base rate increase in a newly filed case. The OUCC is scheduled to file testimony in September. Information and case updates are available by clicking here.
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.
Previous rate case orders for AES Indiana received Commission approval in 2024, 2018, and 2016. A 2017 rate case was dismissed.
Trackers
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.
AES Indiana's authorized trackers make up about 13.7% of a residential customer's typical electric bill as of July 2025.
AES Indiana uses the following trackers. All filings are available by entering the cause number in the IURC's Online Services Portal.
Tracker Recovers Costs for Frequency IURC Cause No. Fuel Adjustment Clause (FAC) Coal and other fuels Quarterly 38703 Transmission, Distribution, & Storage System Improvement Charge (TDSIC) Projects in long-term infrastructure plan Semi-Annual 45264 Environmental Cost Recovery (ECR) Emissions control equipment (including operations & maintenance) Semi-Annual 42170 Demand Side Management (DSM) Energy efficiency programs Semi-Annual 43623 Green Power Rider (GPR) Program allowing customers to voluntarily buy renewable energy credits Annual 44121 Off-System Sales (OSS) Sales to the wholesale power market Annual 44795 Capacity Adjustment Factor (CAP) Capacity cost recovery Annual 44795 Regional Transmission Organization (RTO) Participation in Midcontinent Independent System Operator (MISO) Annual 44808
Additional Cases of Note
Previous AES Indiana/IPL cases before the IURC include:
- 2025-2026 Energy Efficiency Plan (Cause No. 46081)
- Crossvine Solar Project (Cause No. 46113)
- Environmental Cost Recovery (Cause No. 42170 ECR 38)
- Petersburg Repowering Project (Cause No. 46022)
- 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)
- Harding Street Station solar project (Cause No. 45729)
- Utility Receipts Tax reduction (Cause No. TD-50543)
- 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)
- 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.
8-19-25
