Résumé : This article studies the impact of partnership dissolution on individual net income. The variations that are measured are those of individual incomes. The analysis uses longitudinal data from the EU-SILC for 18 European countries covering the period 2004-2007. The results show that the individual net income of women and men increases in the event of partnership dissolution. This increase is mostly due to higher public transfers after the dissolution rather than to changes in labour supply in response to the break-up. Estimation of an econometric model to identify those individual characteristics and macro-economic variables that are likely to influence income variation in the event of partnership dissolution shows that individual net income increases with age, the number of children, level of education, labour market participation, the coverage rate of formal childcare systems, the level of per capita social expenditure and that it decreases with the level of income perceived before the break-up as well as when re-partnering has occurred during the year following the break-up. The influence of the welfare state regime partly runs through childcare coverage and social expenditure but remains significant in itself.