We guarantee the stability of the National Electricity System with tariff deficit re-balancing operations.
Tariff deficits result from the difference between consumption rates and system costs. The recovery of estimated costs which have not been included in regulated revenues for a given year is apportioned between the following years in order to mitigate tariff volatility and ensure an intertemporal balance of the system.
To recover the imbalance between costs and rates there is an apportionment of the Global System Use Rate or of other fees paid by all electricity customers.
The existence and recognition of tariff deficits, as well as the way they are recovered, are regulated by specific legislation, viz. Decree Law No. 237-B/2006 of December 19 and Decree Law No. 165/2008 of August 21. This regulatory framework recognizes the unconditional right by regulated electricity operators to recover tariff deficits and transfer tariff deficit collection rights to third parties.