Generally, Federal law requires employee benefit plans with 100 or more participants to have an audit as part of Form 5500.  Selection of your plan’s auditor is one of the most important duties of the plan administrator so the Department of Labor provides guidance to selecting an auditor at

In addition, the American Institute of Certified Public Accountants (AICPA) provides a sample RFP and Auditor Evaluation Process Checklist on their website at in the Employee Benefit Plan Audit Quality Center.  They recommend plan sponsors verify three items:
  1. The auditor is licensed or certified as a public accountant by a State regulatory authority.
  2. The auditor does not have any financial interests in the plan or the plan sponsor that would affect their ability to render and objective, unbiased option about the financial condition of the plan (having a Madoff flashback?).
  3. The auditor has the depth of experience needed to perform this service by checking their references.  The DOL and AICPA state that the most common reason for deficient accountants’ reports is the failure of the auditor to perform tests in areas unique to employee benefit plan audits.
You may want to start a search on AICPA’s website if you don’t have an auditor in mind.  Center members are required to adhere to strict management practices including the selection of its ERISA employee benefit plan audits as part of the firms peer review reviewed by individuals employed by another Center member firm.
Remember that this year the auditor’s report will attached to the Form 5500 as a PDF file and transmitted electronically using the EFAST2 system.  You can also find more information on EFAST2 on the DOL’s website at