In the case of a new dwelling or not having access to previous invoices, you should use the simple simulator to make a simulation.

The quick simulator defines standard consumption according to the data indicated by you (household, type of use of the house, year of construction, profile of use of equipment).

In the field to fill your current electricity and/or natural gas supplier, you should choose the last resort supplier. In the case of electricity will be EDP Serviço Universal and in the case of natural gas the supplier will depend according to the region, know which in the question Geographical distribution ORDs Natural Gas.