Add to ORKGEqual intra-household sharing is still assumed by the vaste majority of applied analyses in welfare economics. Few pieces of work have tried to depart from the equal sharing hypothesis, but their impact has been limited by lack of data or restricted application to special cases. This pa- per proposes a new framework to derive sharing rules based on individual bargaining power. The latter is de.ned for each household member as the share of resources gained by the household due to his/her presence. The causes of power di¤erentials and their impact on income distribution are analysed in four EU countries presenting signi.cantly di¤erent tax-bene.t systems: Finland, Italy, Germany and the United Kingdom