U.S. employers and the federal government devote over 1.5% of GDP annually toward promoting defined contribution (DC) retirement saving. Using a new employer-employee linked dataset covering millions of Americans, we show that this system of saving incentives benefits White workers and those with richer parents more than their similar-income coworkers who are Black or Hispanic or from lower-income families. Breaking the link between contribution choices and saving subsidies―through revenue-neutral reforms―could close the gaps in DC wealth between White and Black or Hispanic workers and between those with the richest and those with the poorest parents by approximately one-third.