The year 2026 began with a reduction in the value of electricity bills with a green flag in the energy tariff, that is, at no extra cost. For next month, the National Electric Energy Agency (Aneel) informed that the decision on the tariff flag will be announced on January 30th, according to the calendar released by the regulatory agency this week.
Using the calendar, the consumer can follow Aneel’s decisions regarding the tariff flags that will be in force each month throughout 2026. On the scheduled dates, the color of the flag that will be in force in the following month will be announced.
On February 27th, the definition of the flag to be applied in March will be announced and, on the same day in March (27th), the April flag will be published. The definition of the May tariff flag will be announced on April 24th.
The June flag will be announced on May 29th. For July, Aneel said it will release the flag on June 26th. The flag to be applied in August will be announced on July 31st. The September one will come out on August 28th; and October, on September 25th.
Finally, the tariff flag that will be applied in November will be announced on October 30th. The December flag will be announced on November 27th. The flag to be applied in January 2027 will be released on December 23rd.
Extra costs
Created in 2015 by Aneel, the tariff flag system reflects the variable costs of generating electricity. Divided into colors, the flags indicate how much it is costing the National Interconnected System (SIN) to generate the energy used in homes, commercial establishments and industries.
Each month, the operating conditions of the electricity generation system are reassessed by the National Electric System Operator (ONS), which defines the best energy generation strategy to meet demand and outlines a forecast of costs to be covered by the brands.
Therefore, the colors of the tariff flags are defined based on the forecast variation in the cost of energy each month. When the electricity bill is calculated using the green flag, there is no increase. When the red or yellow flags are applied, the bill increases for every 100 kilowatt-hours (kWh) consumed.
It is important to note that, annually, at the end of the wet season, in April, Aneel defines the value of the Tariff Flags for the following cycle. Currently the amounts charged are as follows: in the yellow flag, with less favorable generation conditions, the tariff increases by R$ 1.88 for every 100 kilowatt-hour (kWh) consumed; in the red flag, in Level 1, with more expensive generation conditions, the tariff increases by R$ 4.46 for 100 kilowatt-hour kWh consumed.
In the red flag, at Level 2, generation conditions are even more costly. As a result, the tariff increases by R$7.87 for every 100 kilowatt-hour kWh consumed.
