This is the Congressional Budget Office (CBO) Cost Estimate as ordered reported by the House Committee on Oversight and Government Reform on December 19, 2019. From the Document: "H.R. 3830 would change how information about federal programs is provided online. The legislation would require that specific information about each program administered by a federal agency be available to the public on a website operated by the Office of Management and Budget (OMB). That information would include:  Expenditure data for three fiscal years,  Any performance reviews of the program,  Statutes authorizing the program,  Major regulations related to the program, and  Any federal assistance provided by the program. [...] At the conclusion of the pilot program, CBO estimates that it would cost $8 million over the 2023-2024 period for administrative expenses to develop a website that links all federal programs to existing online information, including such sites as USASpending.gov, Acquisition.gov, Grants.gov, DisasterAssistance.gov, and Regulations.gov. [...] If OMB determined that significant additional data needed to be collected from agencies to develop the proposed website, the cost to implement H.R. 3830 would be larger."
Congressional Budget Office: http://www.cbo.gov/