As of September 2006, nearly 1.8 million entities were recognized as tax exempt organizations by the Internal Revenue Service (IRS). As such, they do not have to pay federal income taxes. Exempt organizations are still required to remit amounts withheld from employees' wages for federal income tax, Social Security and Medicare, as well as other taxes. Previous GAO work identified numerous government contractors, Medicare providers, and charities participating in the Combined Federal Campaign (CFC) with billions in unpaid federal taxes. Today's testimony, based on a report that we are releasing today, summarizes the results of work we performed at the request of Representative Ramstad, Ranking Member of the Subcomitte on Oversight, Committee on Ways and Means, to audit exempt organizations. Specifically, this testimony covers whether and to what extent (1) exempt organizations have unpaid federal taxes, including payroll taxes; (2) selected case study organizations and their executives are involved in abusive or potentially criminal activity; and (3) exempt organizations with unpaid federal taxes received direct grants from certain federal agencies. GAO reviewed unpaid taxes and exempt organization data from IRS and selected 25 case studies for audit and investigation. GAO also reviewed data from 3 major grant disbursement systems. Nearly 55,000 exempt organizations had almost $1 billion in unpaid federal taxes as of September 30, 2006, with charitable organizations being responsible for more than 85 percent of the $1 billion in debt. About 1,500 of these entities each had over $100,000 in federal tax debts, with some owing multi-million dollars in federal taxes. The majority of this debt represented payroll taxes and associated penalties and interest dating as far back as the early 1980s. Willful failure to remit payroll taxes is a felony under U.S. tax law. The $1 billion figure is understated because some exempt organizations have understated tax liabilities or did not file tax returns. GAO selected 25 exempt organizations for investigation based primarily on amount of tax debt and number of periods delinquent. In all 25 cases, we found abusive and potentially criminal activity, including repeated failure to remit payroll taxes withheld from employees. Officials diverted the money to fund their operations, including paying themselves salaries ranging from hundreds of thousands of dollars to over $1 million. Many of the officials accumulated substantial assets, such as multimillion-dollar homes and luxury vehicles. Key officials and employees at 4 entities were engaged in criminal activities, including attempted bribery of an IRS official and illegal gambling. Despite repeatedly abusing the federal tax system, these entities continued to retain their exempt status. IRS does not have the authority to revoke an organization's exempt status because of unpaid federal taxes. Over 1,200 of these exempt organizations with unpaid... [ABSTRACT FROM AUTHOR]