Aneel Overhauls Power Tariff Formula to Prioritize Customer Satisfaction

Overview

• Brazil's electricity regulator unanimously approved the change on Jan. 27, 2026, with implementation set for January 2027.
• The revision alters the Fator X by boosting the weight of Aneel’s Consumer Satisfaction Index (IASC) and adding metrics from Consumidor.gov.br and Aneel’s ombudsman contact system.
• Distributors with stronger results will see higher remuneration while weaker performers face reductions, despite consultation-stage critiques about asymmetric incentives.
• Director‑rapporteur Fernando Mosna said symmetry is not required, framing the measure as targeted regulation intended to induce operational and service improvements.
• Aneel detailed ranges for financial effects, including potential revenue cuts of up to 2.5% for low IASC scores and limited impacts of up to 1% from the new complaint‑based indicators, alongside a refreshed late‑service metric and continued use of outage duration indicators.