A plan’s sponsor’s responsibilities are plenty, but foremost among these is to ensure that reports are kept up to date, and where appropriate, filed with the proper government agency.
Form 5500 is the most critical. Fines for failure of a timely filing include both an IRS penalty of $25 per day up to a max of $15,000, and a Department of Labor fine of $1100 per day……. No Maximum!
Additionally, a Summary Plan Description must be provided at the startup of the plan, then at least once every five years as well to all participants upon request.
Failing to deliver participant notices, including the 404(a) fee disclosure, participant eligibility and summary annual reports
And when a participant files a complaint, oral or written, be sure to document and address it completely.