Congressional Budget Office Cost Estimate: H.R. 4478: FISA Amendments Reauthorization Act of 2017 [open pdf - 96KB]
"H.R. 4478 would extend for four years the authority of the federal government to conduct surveillance under title VII of the Foreign Intelligence Surveillance Act (FISA) of 1978 (sections 1881-1881g of title 50, United States Code), as added by the FISA Amendments Act [Foreign Intelligence Surveillance Act] of 2008 (Public Law 110-261) and by the USA FREEDOM Act [Uniting and Strengthening America by Fulfilling Rights and Ending Eavesdropping, Dragnet-collection and Online Monitoring Act] of 2015 (Public Law 114-23). That authority is set to expire on December 31, 2017. CBO [Congressional Budget Office] does not provide estimates for classified programs; therefore, this estimate addresses only the unclassified aspects of the bill. On that limited basis, CBO estimates that implementing the unclassified provisions of the bill would cost $3 million over the 2018- 2022 period, subject to the availability of appropriated funds."
Congressional Budget Office: http://cbo.gov