Decrease in the willingness of childbearing is an international phenomenon that afflicts Hungary just like any other country. Following the consolidation after the 2007/2008 crisis, new types of economic policy tools have been introduced in Hungary to improve birth rates. In consent with the arguments of former international research, the study assumes that although the factors affecting birth rates are wider than fiscal incentives, the government is able to have a considerable effect on achieving the required rate of reproduction via home settlement subsidies, and for this purpose, it has to ensure fiscal sustainability. The paper aims at providing an outlook for the period 2020–2040, in respect of the possible fiscal obligations of the family home settlement benefit that is an important pillar of the Hungarian family subsidising regime. Demographic data and the regulation for family home settlement benefit serve as the model computation framework. The calculations demonstrate that the family subsidising regime imposes sustainable commitments to the fiscal budget, and may change the birth rate trends favourably.