At least 3,700 private contractors receiving funding under the American Recovery and Reinvestment Act (P.L. 111-5) owe back taxes, a recent GAO report has found. The report estimates that about five percent of all contract and grant recipients under the stimulus bill were tax delinquent, though GAO noted that its sample study might greatly underestimate the extent of tax delinquency. GAO found that 3,700 contractors owed at least $757 million in taxes when receiving Recovery Act contracts or grants, but as Senator Tom Coburn (R-OK) noted at a May 24 hearing before the Senate Homeland Subcommittee on Investigations, if the rate of tax delinquency is extended to all 80,000 Recovery Act recipients, the amount of taxes owed could exceed $1 billion.