Congressional Budget Office Cost Estimate: H.R. 6930, Asset Seizure for Ukraine Reconstruction Act [open pdf - 162KB]
From the Document: "H.R. 6930 would require the President to determine whether certain members of the Russian State Duma and the Russian Federation Council should be subject to existing sanctions. The President would be required to submit a report to the Congress on the imposition of additional sanctions. The bill also would establish an interagency working group to consider constitutional mechanisms that the Administration can use to confiscate assets of foreign persons whose wealth is linked to political support for President Putin. The group would be required to produce three reports on the findings of the working group, recommendations for additional energy sanctions, and additional authorities the President might need to take those steps."
Congressional Budget Office: https://www.cbo.gov/