When I stopped paying attention to their bull, they were overstating by way more than 90%. The article cites a study saying DOGE’s overstatement was about 90% of the total number in the end.

Also, the analysis in the study is conservative, and does not include follow on effects due to obvious immediate economic damage from the cuts (which seem to have been chosen to maximize damage to the economy).

$21.7B net cost is probably too low if you include that. If you value the programs that were eliminated at $0, the net cost was still in the billions.