Single Audits

All non-Federal entities that expend $500,000 or more of Federal awards in a year are required to obtain an annual audit in accordance with the Single Audit Act Amendments of 1996, Office of Management and Budget (OMB) Circular A-133, "Audits of States, Local Governments and Non-Profit Organizations," the OMB Circular A-133 Compliance Supplement and Government Auditing Standards. The Office of Inspector General performs quality control reviews of selected Single Audits covering expenditures of DOT funds. The objectives of these reviews are to determine: (1) the adequacy of the independent auditors’ work; (2) whether the work complied with relevant auditing standards; and (3) the extent to which we can rely on the auditors’ work.

• Single Audit Information
• Revised OMB Circular A-133 Audit Requirements (June 27, 2003 & June 26, 2007)
• OMB Circular A-133 Compliance Supplement 2010
• Single Audit Data Posted by the Federal Audit Clearinghouse
• Grants Management Committee’s Single Audit Basics Brochure (June 2005)