Spain has experienced important and rapid transformations, both politically and socially, that have changed the country into a society comparable to the rest of the members of the European Union. As the country has moved, since 1975, from dictatorship to democracy, Spanish families have also experienced profound changes, affecting the family’s structure, its social functions and its internal dynamics. The analysis carried out on both the ownership and the income distribution of money in Spanish dual-income couples has revealed some trends towards greater equality between men and women, especially in the younger generations. The vast majority of young couples are dual-income compared to the traditional model of male breadwinner and housewife, still dominant in the older generation’s households but with a declining presence in Spanish society. The chapter observes some elements that persist in all generations and which obstruct egalitarian relationships, even for the youngest couples, and one is the income gap between women and men.