When plan sponsors think about retirement plan risk, they often focus on investment committees, financial advisors, or highly compensated executives. In reality, the employee who creates the greatest risk to a retirement plan is often someone far less visible.
It’s usually the person responsible for payroll.
Most retirement plan operational failures begin with payroll data. Incorrect hire dates can cause eligibility failures. Compensation entered incorrectly can result in missed deferrals or improper employer contributions. Delayed transmission of employee contributions can create prohibited transaction concerns. A simple payroll mistake can affect dozens of participants before anyone realizes there is a problem.
This isn’t a criticism of payroll personnel. In fact, payroll employees often carry an enormous compliance burden without realizing it. Retirement plans rely heavily on payroll systems to determine eligibility, calculate contributions, apply plan limits, and maintain participant records. When incorrect information enters the system, the error frequently spreads throughout the plan.
Many sponsors devote substantial attention to investment performance while paying little attention to payroll procedures. Yet most correction projects I encounter have nothing to do with investments. They involve payroll mistakes that resulted in corrective contributions, lost earnings calculations, and administrative headaches that could have been avoided with proper procedures and training.
That is why payroll should never be viewed as a back-office function. Payroll personnel are critical partners in maintaining retirement plan compliance. They need training, support, and regular communication with the plan’s advisors and administrators.
A retirement plan is only as accurate as the information that feeds it. Sponsors who understand that reality are far less likely to face costly correction programs later. The most dangerous employee in your 401(k) plan is usually not the executive making decisions. It is the employee unknowingly entering bad data into the payroll system.