Also related to the study of situations of precariousness in terms of maintenance, this refers to a situation of insufficiency in economic resources to meet –in the short term- the costs considered, in a determined society, as necessary to participate on a minimum level in the lifestyle, customs and normal activities for that society. Households are in risk of absence of wellfare if they dispose of, in the given reference period, income below the threshholds shown to have access to minimum levels of wellfare expected in a specific society.