About half of first-generation students completed a bachelor’s degree within four years, compared to 68 percent of continuing-generation students, a gap of 18 percentage points. About 69 percent of first-generation students graduated within six years, compared to 86 percent of continuing-generation students, a 17-percentage-point difference. These gaps shrank but didn’t disappear for first-generation students with strong academic records and higher incomes. Even for first-generation students who were both academically prepared and relatively well-off, these gaps remained. Differences in the institutions first-generation and continuing-generation students attend—and the levels of supports they offer—didn’t account for completion-rate gaps, either.