Estimated Costs and Timeline to Implement Mandatory E-Verify: Fiscal Year 2016 Report to Congress [open pdf - 637KB]
"This report responds to the Senate request to study and report on the estimated costs and timeline for making E-Verify mandatory for all employers. Assumptions for the costs are based on expanding E-Verify under a 4-year scenario of mandated participation as described in the Legal Workforce Act (H.R. 1147), which was introduced in the 114th Congress. USCIS [U.S. Citizenship and Immigration Services] estimates that an expansion of E-Verify to nationwide mandatory use, enacted as proposed in H.R. 1147, could result in additional costs ranging from $95 million to $214 million above current cost estimates for the first 4 years. Actual costs incurred from the expansion of E-Verify to a nationally mandated program will depend on many factors, including, but not limited to, the requirements of the legislation for verifying employment authorization of existing employees and the number of employers that are subject to an E-Verify mandate."
U.S. Department of Homeland Security: http://www.dhs.gov/