Congressional Budget Office Cost Estimate: H.R. 3845: USA PATRIOT Amendments Act of 2009 [open pdf - 18KB]
"CBO estimates that implementing H.R. 3845 would cost about $9 million over the 2010-2014 period and less than $500,000 annually in subsequent years, assuming the availability of appropriated funds. Enacting the bill could affect direct spending and revenues, but CBO estimates that any such effects would not be significant. CBO has determined that the provisions of H.R. 3845 are either excluded from review for mandates under the Unfunded Mandates Reform Act because they are necessary for national security or contain no mandates as defined by that act."
Congressional Budget Office: http://cbo.gov