MISO customers can still win years of refunds

Customers on the Midcontinent Independent System Operator, or MISO, grid still have a live shot at getting back money they already paid. In a federal ruling, the D.C. Circuit said the Federal Energy Regulatory Commission, or FERC, could order years of refunds on disputed transmission charges even after earlier rate decisions in the fight were vacated. The court also allowed FERC to apply interest.

The practical effect is simple enough: the case is no longer just about the right number for a future rate. It is about whether a bad rate can still be unwound after the fact, and whether the money can be clawed back from transmission owners.

The refund math

FERC set a replacement return rate of 9.98% and used it as the base for refunds. That number mattered because once the original return determinations fell away, the agency needed a lawful benchmark to measure how much had been overcollected.

The refund order reached back to the First Complaint proceeding’s 15-month window, from Nov. 12, 2013, through Feb. 11, 2015. It also covered the period from Sept. 28, 2016, to the date of FERC’s order. In other words, the relief was not limited to future billing cycles; it reached into money already collected and already spent.

Why the backdating held

The court said it had invalidated both the initial and the later return determinations, and that gave FERC room to reset the effective date of relief. Under the agency’s remedial authority, the panel said, backdating the order to Sept. 28, 2016, fit the scope of the error the court identified.

That leaves electric customers and transmission owners still fighting over the same core question: when a rate order collapses, does the remedy collapse with it, or can FERC still reach back and make the books right? Here, the court said the agency could keep the refund remedy alive, including interest, for the charges tied to the disputed rate.