FERC Eliminates PJM’s De Minimis Rule and Orders Retroactive Transmission Cost Reallocations

In a March 6, 2026 order (the Order), the Federal Energy Regulatory Commission (FERC or the Commission) reshaped how PJM Interconnection, L.L.C. (PJM) allocates transmission project costs. The Commission eliminated PJM’s long‑standing de minimis threshold exemption—a rule that arguably shielded large load zones from paying for certain transmission upgrades despite significant usage—after the U.S. Court of Appeals for the District of Columbia (the Court) found the exemption violated... By: Husch Blackwell LLP