Retirement plan fees and hidden costs can affect an employers ability to offer a 401(k) plan and can negatively impact plan participants retirement savings, but even with recent fee disclosure rules, its still very difficult for plan sponsors to know how much they are paying for their plan.
Fee disclosure rules that were implemented in 2012 helped bring 401(k) plan fees down, but theres still more that can be done when it comes to designing a new plan or revamping an old one.