The research identifies the redistributive effect and the costs of implementing a Guaranteed Minimum Income (GMI). The methodology used is the Lorenz curve and income distribution parameters. Assuming that the GMI is funded by a progressive earmarked tax, the redistributive effect of this program is a rising function of the average social transfer rate, the concentration coefficient of this transfer, the concentration coefficient of taxes, and the effect of reshuffling. Using individual data from the EU-SILC database, a hypothetical scenario was created where all EU countries implement a uniform GMI system.