The Demographic, Economic, and Conventional Budget Outlook, 2026-2056 (May 2026)
PWBM projects the U.S. resident population will grow from 343.5 million in 2026 to 371.5 million in 2056, with net immigration accounting for more than 100 percent of this growth. Real GDP growth slows from 2.2 percent to 1.1 percent as growing mandatory spending is matched with shrinking working-age labor force participation.