Donald Trump has proposed eliminating or severely modifying the Deferred Action for Childhood Arrivals (DACA) program. Many Americans believe that the presence of unauthorized immigrants is harmful to the economy and would like to see steps taken to reduce their presence. However, a repeal or roll-back of DACA would harm the economy and cost the U.S. government a significant amount of lost tax revenue. We estimate that the fiscal cost of immediately deporting the approximately 750,000 people currently in the DACA program would be over $60 billion to the federal government along with a $280 billion reduction in economic growth over the next decade.