Duke Energy Indiana $89M Overcharge: What the "Refinement" Footnote Actually Did

OUCC Abby Gray filed a formal appeal in IURC Cause No. 46038 on June 4 alleging Duke Energy Indiana over-collected more than $89 million from approximately 890,000 customers across 69 of Indiana's 92 counties. The IURC's written rate order stated $396 million in authorized annual revenue increases; the figure the commission actually approved was $295.7 million. A footnote called those figures "subject to refinement." Duke's position is that the footnote covers a standard true-up for capital costs that came in higher than initial estimates. OUCC's position: Duke used that footnote to collect near the rejected $396 million rather than the $295.7 million actually authorized. Indiana's large industrial ratepayer coalition has joined the appeal seeking an $86.5 million Step 2 rate reduction plus refunds with interest.

The structural risk is larger than the dollars. If that "refinement" interpretation holds, two presiding officers, not the full five-member commission, can effectively expand authorized utility revenue without a full commission vote. Every Indiana utility could use that precedent in future rate cases. Also worth noting: new Chairman Swinger is recused from this case too, which means Andy Zay will vote on the appeal of his own May 27 docket entry.