The National Electric Energy Agency (Aneel) has announced a green flag for October, bringing relief to electricity bills ahead of the 2026 Elections, following months of high costs.
In news that promises to directly impact the budgets of Brazilian consumers, the National Electric Energy Agency (Aneel) confirmed last Friday, September 25, that the tariff flag for the coming month will be green. This decision marks the end of a five-month period under the yellow flag, which had driven up the cost of electricity nationwide.
The announcement comes at a strategically sensitive time, just nine days before the first round of the 2026 Presidential Elections, scheduled for October 4. The reduction in electricity bills is a significant point, especially after energy tariffs exerted significant pressure on inflation in recent months.
Financial Relief and the Political Landscape
The shift to the green flag means there will be no additional costs on electricity bills for consumers. This change represents a welcome financial relief, reversing the upward trend observed in previous months, when residential energy tariffs saw a substantial increase.
Shortly before the official announcement by the regulatory agency, the Minister of Mines and Energy, Alexandre Silveira, shared the news on his social media channels. He highlighted that the transition to the green flag is the result of both robust energy planning implemented by the government throughout the year and the beneficial contribution of rainfall to the country’s hydroelectric plants.
“Your energy bill will be cheaper with the green flag in October. Beyond lowering the cost of living and production, it is a demonstration of the results of the actions that have been adopted throughout the year. The rains recorded this month, combined with good planning alongside all entities that make up the electric sector—especially in the face of El Niño—were essential for this,” the minister stated.
Rainfall Boosts Reservoirs and Reduces Costs
The Aneel decision is directly attributed to the favorable hydrological scenario. Increased rainfall in the South and Southeast regions was crucial for raising and stabilizing the levels of the reservoirs at the country’s main hydroelectric plants. With more water available, the National Interconnected System (SIN) can rely less on activating thermoelectric plants, which are more expensive and polluting.
Data from the Monthly Operation Program (PMO) bulletin of the National Electric System Operator (ONS), covering the operational week from September 26 to October 2, confirmed intense precipitation in strategic river basins. Consequently, weekly average values for the Marginal Cost of Operation (CMO) showed significant drops across all subsystems, most notably in the North region, where the CMO plummeted from R$ 1,866.74/MWh to R$ 461.46/MWh.
Economic Impact and Other Measures
In recent months, electricity tariffs were a primary factor behind rising inflation. Reports indicate that, without the Itaipu Bonus and with the yellow flag, electricity bills became 7.42% more expensive, putting pressure on family budgets.
Concurrently, the government has implemented other measures to stabilize the economy. On Thursday (9/24), the extension of the diesel subsidy was confirmed, adding R$ 2.12 per liter for another 30 days. There were also flexibilities in the subsidy rules for ethanol producers, aiming to ensure that discounts are applied at the point of sale.
On the political front, the proximity of the 2026 election keeps the focus on polls. The BBC News Brasil poll aggregator points to a statistical tie between Lula (PT) and Flávio Bolsonaro (PL), both with 45% of voting intentions, indicating a tight race for the runoff election on October 25.
Rising Demand and the El Niño Challenge
Despite the immediate relief, Brazil’s electric sector is already preparing for future challenges. The ONS projects a significant increase in energy demand in the coming months, driven by the high temperatures expected and intensified by the El Niño climate phenomenon.
For the first week of October (September 26 to October 2), the SIN is expected to see a 3.6% growth in demand, reaching 85,274 MWaverage. The North and Northeast regions show the highest projected growth, with increases of 9.3% and 9.2%, respectively, requiring vigilance and efficient capacity management.
The transition to the green flag in October is positive news for consumers and the economy, easing pressure on inflation and household budgets. However, the electric sector remains attentive to the coming months, facing the challenge of balancing rising energy demand driven by El Niño with the need to maintain system stability, ensuring a more sustainable and accessible energy future for Brazil.