Critics often say it would be far too expensive for the United States to deport all illegal immigrants.

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In fact, it would cost roughly six times as much to allow all current illegal immigrants to live in the U.S. for life than it would to deport them all, the study found.

CIS used data from Immigration and Customs Enforcement, which reported the average cost of a deportation was $10,854 in fiscal year 2016. This figure includes the cost of apprehension, detention and processing.

Meanwhile, the average lifetime net fiscal drain (taxes paid minus services used) for each illegal immigrant is $65,292. This figure was based on fiscal estimates of immigrants by education level from the National Academies of Sciences, Engineering, and Medicine.