With the deadline for filing form 5500 literally around the corner (July 31), fees and expenses associated with 401(k) are critical issues for plan sponsors.   One of the most important things a plan sponsor can do is to benchmark their plan fees against the ones in comparable plans, to mitigate their risk for lawsuits or sanctions.  According to the July 20, 2016 article in Bloomberg BNA "New York Accused of Profiting Off Workers' 401(k)", New York Life has been sued by employees who claim that one of the company’s in-house mutual funds carried needlessly high fees that eroded their retirement savings.