Duke Energy Indiana, LLC

Duke Energy Indiana's voluntary time-of-use rate is the main tool for EV owners who want to cut charging costs. It came out of the utility's 2025 rate case, which the IURC approved in January 2025, and it is open to all residential customers. The rate organizes the day into three tiers: an on-peak period (6 to 8 a.m. and 5 to 9 p.m. in winter; 5 to 9 p.m. in summer), an off-peak period covering all other hours, and a discount period from 10 p.m. to 4 a.m. The discount period carries the lowest per-kWh charge, so charging an EV overnight is the cheapest option on this rate. Exact published cents-per-kWh amounts are in Duke Energy's filed tariff schedules and were not confirmed against a publicly accessible source during this research pass.

The most significant current rebate for EV owners is the residential Make-Ready Credit, approved by the IURC in April 2025 (Cause No. 46069) and offered under Tariff No. 30. This program provides up to $1,100 toward the electrical infrastructure upgrades needed to support a Level 2 charger, separate from the cost of the charger itself. Customers can either hire their own licensed electrician and submit a paid invoice for reimbursement, or use Duke Energy's contractor coordination option. The Make-Ready Credit can be used whether or not the customer enrolls in the TOU rate, but enrolling in the discount-period TOU rate is the logical complement. The earlier Off-Peak Charging Credit pilot, which paid quarterly bill credits for off-peak EV charging, and the Commercial Charger Rebate pilot ($500 per Level 2 station, minimum four stations) both closed to new applications on June 30, 2025, following the end of the original two-year IURC-approved pilot period.

Duke Energy Indiana is a regulated, vertically integrated utility operating under IURC jurisdiction; Indiana is not a deregulated retail electricity market, so customers have no choice of supplier. The utility's service territory spans most of central and southern Indiana, covering 71 counties. Because Duke Energy Indiana builds and recovers costs of EV-related infrastructure through IURC rate cases rather than standalone programs, program terms and credit amounts can change when rate cases are settled or new cause numbers are filed. Customers should verify current program availability at duke-energy.com before applying.