Many policies affect future inequality, from taxation to investments in education. Therefore, citizens’ support for these policies may depend on their beliefs about how inequality will evolve over time. In three large-scale experiments, I examine how well individuals predict future inequality in the presence of economic growth, and I examine how beliefs about inequality influence people’s preferences for redistribution. I find that most people underestimate future increases in inequality, but this is inconsequential as beliefs about inequality do not influence preferences for redistribution. Rather, what matters is whether people know if redistribution will come at a personal cost to themselves.