Three months later, ENRE Resolution 234/2026 dated April 30 authorized a further 2.35 percent increase effective May 1, 2026. March 2026 inflation readings showed both indices converging at 3.38 percent, which under the standard formula would have produced an identical tariff adjustment. However, ENRE applied an efficiency stimulus factor of one percent for the period from May 1, 2026 through April 30, 2027, reducing the net increase to 2.35 percent. This efficiency factor transfers productivity gains from the transmission company to users by reducing regulated prices in real terms.
Both resolutions cite the national energy emergency declared by Decree 55/2023 and extended successively through Decrees 1023/2024 and 370/2025 until July 9, 2026. The Economy Ministry’s notes dated January 26 and April 28, 2026 direct continued price corrections across electricity generation, transmission and distribution segments under federal jurisdiction, referencing the economic situation inherited on December 10, 2023.
The indexation mechanism was established through ENRE Resolution 313/2025 issued April 30, 2025 and rectified by Resolution 592/2025 on August 18, 2025. That framework approved initial hourly values for LIMSA equipment starting May 1, 2025 and created the updating mechanism designed to maintain transmission revenues constant in real terms across a five-year tariff period. The mechanism calculates transport charges for each equipment type and voltage level monthly.
The resolutions indicate LIMSA operates as an independent transmission company rather than a federal concession holder, though both categories fall under ENRE jurisdiction according to Law 24.065. The regulatory adjustments follow guidelines established in an Economy Ministry note from April 28, 2025 regarding quinquennial tariff reviews.
This article was curated and published as part of our South American energy market coverage.
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