The August 2026 tariff flag is yellow. This means that the consumer subject to the flag system pays an additional R$1.885 for every 100 kilowatt-hours consumed, equivalent to R$0.01885 per kWh. The National Electric Energy Agency announced the maintenance of the flag on July 31, effective from August 1, 2026.
The amount of R$1,885 is not a fixed charge per residence. It must be multiplied by consumption. Therefore, a house that consumes 300 kWh does not only pay R$1,885 more: the basic tariff additional amounts to R$5,655, approximately R$5.66 before applicable taxes are applied.
The table below allows you to quickly calculate the increase for four consumption ranges. It does not represent the total value of the electricity bill.
How much does the yellow flag add in August 2026
The calculation is proportional to the consumption registered on the invoice:
Basic additional = consumption in kWh × R$ 0.01885
It is also possible to divide the consumption by 100 and multiply the result by R$ 1,885:
Basic additional = consumption ÷ 100 × R$ 1,885
| Billed consumption | Calculation | Additional basic tariff | Approximation in cents |
|---|---|---|---|
| 100 kWh | 100 × R$ 0.01885 | R$ 1,885 | R$ 1.89 |
| 200 kWh | 200 × R$ 0.01885 | R$ 3,770 | R$ 3.77 |
| 300 kWh | 300 × R$ 0.01885 | R$ 5,655 | R$ 5.66 |
| 500 kWh | 500 × R$ 0.01885 | R$ 9,425 | R$ 9.43 |
The values in the table are direct calculations on the official additional of R$0.01885 per kWh. The charge presented on the invoice may involve rounding and taxes, which is why the final impact should not be treated as identical to the approximation column. ANEEL informs that the same taxes levied on tariffs also apply to tariff flags.
Example for a residence that consumes 300 kWh
For a billed consumption of 300 kWh:
300 × R$0.01885 = R$5.655
Rounding the mathematical result to two decimal places, the basic additional is close to R$ 5.66. This number does not yet allow us to conclude what the exact increase in the invoice will be, as the document may include taxes and other components not directly related to the brand.
The most common mistake is to read “R$ 1,885 per 100 kWh” as if this were the maximum additional or a one-time fee. In reality, each 100 kWh block adds another R$1,885:
- 100 kWh correspond to one block;
- 200 kWh correspond to two blocks;
- 300 kWh correspond to three blocks;
- 500 kWh correspond to five blocks.
Consumptions that are not multiples of 100 are also included in the calculation. On a 250 kWh bill, for example, the basic additional would be:
250 × R$0.01885 = R$4.7125
Why the final bill is not just consumption multiplied by the flag
The tariff flag is just one of the installments of the bill. According to ANEEL, the energy tariff covers costs related to generation, transmission, distribution and sectoral charges. The invoice may also present taxes and charges defined by other levels of government.
For this reason, two households with the same consumption may receive different total bills when they are served by different distributors, belong to different tariff modalities or are subject to different tax rules and local charges.
The table in this guide only calculates the basic yellow flag additional tariff. It does not include:
- the conventional energy tariff;
- the costs of using the network;
- other tariff components;
- taxes levied on the flag and fare;
- public lighting contribution or other local charges;
- interest, fines, installments or credits posted on the invoice.
ANEEL itself differentiates the energy tariff from the additional brand. Tariffs cover most supply costs, while flags reflect monthly variations in generation costs.
Taxes can increase the impact observed on the invoice
The values of R$ 1.885 per 100 kWh and R$ 0.01885 per kWh are tariff references. ANEEL clarifies that the same taxes applicable to tariffs apply to the flag. Therefore, just adding the table number to the value of a previous bill may produce a lower estimate than the impact actually shown on the new bill.
There is no single percentage that can be added to the table for all residences without consulting the invoice and the rules applicable to the location. The safest way is to use the table as a reference for the basic additional and check the details issued by the distributor.
Why is the flag yellow in August
ANEEL attributed the decision to less favorable generation conditions during the dry period. According to the statement published on July 31, 2026, the reduction in the levels of hydroelectric reservoirs increases the need to activate thermoelectric plants, whose generation has a higher cost. August repeats the yellow flag observed in May, June and July.
The colors are defined monthly and act as a sign of the variable generation costs. The green flag does not produce additional; yellow indicates less favorable conditions; and the two red flag levels correspond to progressively more costly conditions.
The assessment considers the forecast of hydraulic and thermal generation and the operating conditions of the National Interconnected System. This explains why the color can change from one month to the next, even if the distributor's conventional tariff remains the same.
To whom the charge applies
The flag system reaches captive consumers served by distributors, with the exception of units located in isolated systems. The value is proportional to consumption, and not to the property class.
There are situations that require specific reading of the invoice. ANEEL informs, for example, that Social Tariff discounts also apply to the value of flags. Therefore, the general table should not be used in isolation to estimate the charge for a beneficiary family without considering the discount actually recorded.
How to check the additional on your electricity bill
1. Find billed consumption
Look for the consumption for the period on the invoice, expressed in kWh. Do not use the value in reais from the previous bill as a starting point for the calculation.
2. Multiply consumption by R$ 0.01885
A bill with 180 kWh, for example, produces the following basic additional:
180 × R$ 0.01885 = R$ 3.393
The approximation in two decimal places is R$ 3.39, before considering applicable taxes.
3. Look for the line referring to the flag
The name and visual organization may vary between distributors. Compare the calculated value with the tariff charge details, without confusing it with energy tariffs, public lighting, taxes or other charges.
4. Check discounts and taxes
If the unit receives a Social Tariff or other applicable benefit, check whether the discount appears in the details. To understand the difference between your estimate and the invoice, also consult the taxes and the consumption period informed by the distributor.
Reducing consumption reduces the additional, but does not guarantee an equal drop in the total
As the flag is proportional to the kWh billed, consuming less mathematically reduces this portion. A drop from 300 to 200 kWh, for example, reduces the basic additional from R$5,655 to R$3,770.
This does not mean that the total bill will drop by exactly R$1,885. Other components of the invoice may remain, change according to their own rules or suffer tax incidence. The flag helps understand a variable portion of the cost, but does not act as a complete bill forecast.
The practical recommendation is simple: check the consumption in kWh on your bill and save the table to redo the calculation when the next bill arrives. Avoid estimates based solely on the amount paid in the previous month.
Frequently asked questions
Does the yellow flag only add R$1,885 to the bill?
No. This is the additional charge for every 100 kWh. Those who consume 300 kWh have a basic additional of R$5,655; Those who consume 500 kWh reach R$ 9,425.
Is the value in the table the exact increase in the invoice?
Not necessarily. The table shows the basic tariff additional. Taxes are also levied on the flag, and the account contains other components that are not calculated by this table.
Does the yellow flag change the conventional fare?
The flag is an additional charge associated with variable generation costs. It should not be confused with the conventional tariff approved for each distributor.
Do all consumers pay the same total?
No. The value per kWh of the brand is standardized for the consumers reached by the system, but the total depends on consumption. Isolated systems are the exception, and Social Tariff beneficiaries may have discounts applied to the brand.
Will the flag remain yellow in the coming months?
It is not possible to say. ANEEL defines and publishes the color monthly, according to the conditions expected for generation. The July 31 announcement specifically addresses August 2026.
