Little is known about whether and under which conditions populist radical right parties’ (PRRPs’) nativist welfare politics matters to the voters. I address this gap in the research and test the argument that the electoral appeal of this electoral discourse varies among welfare regimes. The study compares the conservative and social-democratic welfare regimes and focuses on the vote choices of the two core constituencies of PRRPs – economically exposed and immigration-sceptic voters. The results show that these electorates support PRRPs’ nativist welfare positions for very different reasons in the two welfare regimes. First, in the conservative regime, economically exposed citizens vote for PRRPs, the more they stress nativism and welfare expansion. By contrast, in the social-democratic regime this group of voters is more likely to support positions combining nativism and dismantled welfare benefits. Second, immigrant-sceptic voters in the social-democratic regime support PRRPs who pledge to preserve the welfare state, and increased migration considerably boosts the probability that they do so. By contrast, this group of voters in the conservative regime is more likely to support PRRPs who seek to partly dismantle the welfare state, and the inflow of immigrants is unrelated to these choices. These results have important implications and suggest that welfare regimes moderate public opinion differently in the current age of populism compared to previous eras.