Many aspects of the economic transition which started in 1989 in Poland are by now complete. However, the route Polish governments have so far taken concerning the system of support for low-income families still implies very different poverty alleviation schemes compared to those found in many developed countries. We examine the Polish system of social assistance in a comparative context with Germany and focus on its implications for financial incentives to work. The paper shows the effect of extending the financial support system for poorest families in Poland on labour market incentives. We demonstrate that assumptions concerning sharing of resources among families within households have significant implications on the resulting financial incentives and importantly change the implied consequences of the reforms. This is the case especially for single-adult families. 74% of single adults without children, and 53% of lone parents in Poland live in multi-family households.