How would deporting undocumented workers affect the U.S. economy?

Dramatically expanding immigration-enforcement agencies and courts to deport roughly 11 million people would cost the US government an estimated $400 billion to $600 billion, according to research by The American Action Forum. The most affected industries would be farming and construction, which employ some of the largest numbers of undocumented workers. Undocumented workers contributed $13 billion in payroll taxes to old age, survivor and disability insurance in 2010, a Social Security Administration study from 2013 found. They accessed about $1 billion in benefits, so that nets to a $12 billion contribution that wouldn't exist if you deported them. Deporting undocumented workers might cause some native workers to earn less. When unauthorized workers take low-paying jobs, their American counterparts move on to take more specialized and high-skilled positions.