Residential decision tool · time of use
White tariff — is time-of-use worth it?
Data: July 24, 2026 · ANEEL-approved tariffs
Split your consumption by time period and compare the TE + TUSD portion under both structures using your utility’s current approved tariffs.
Source and comparison limits
Time-period and standard rates come from ANEEL’s Approved Tariffs database, using each utility’s current period. Original R$/MWh figures are converted to R$/kWh and represent applicable TE + TUSD excluding taxes.
The tool does not estimate your hourly consumption: the percentages are your assumptions. Tariff flags, taxes, public lighting and other items are excluded; the tariff flag applies equally under both structures.
Frequently asked questions
Is the White Tariff usually worthwhile?
It depends on when you consume. It tends to favor households that concentrate consumption off-peak. For homes using electric showers, cooking appliances or air conditioning early in the evening, the higher peak rate often cancels the off-peak savings.
When is the peak period?
Each utility has approved time windows for its area. In many areas, peak covers three consecutive hours on weekdays, with adjacent shoulder periods, often within an approximate 5:30 p.m. to 10:30 p.m. window. Check your own utility’s schedule before switching.
Does the comparison include taxes and tariff flags?
No. It compares TE + TUSD excluding taxes under both structures. This keeps the comparison consistent: taxes and the tariff-flag surcharge apply to both and do not change which time structure is cheaper for the same consumption.