Mexico Energy Commission Updates Charge‑Billing Methodology
The Comisión Nacional de Energía revised its methodology for determining charges, clarifying exception periods and key considerations.
On Sept. 30, 2026 the Diario Oficial de la Federación published the Comisión Nacional de Energía’s (CNE) revised methodology for determining energy‑market charges. The update tightens the definition of the exception period and adds several new calculations that could raise or lower tariffs for electricity suppliers, bilateral traders, and load‑management vendors operating in Mexico. Counsel should review the new formulae against current billing contracts, assess whether close‑dated agreements will be affected, and adjust any automated invoicing systems accordingly. Firms with cross‑border or multinational energy portfolios should flag the changes to client risk teams and consider engaging with CNE to confirm the application of the clarified methodology under their specific market segments. The immediate operational impact is a potential shift in cost structures; a subsequent monitoring of CNE’s guidance forum will be prudent to capture any further clarifications or supplementary schedules.