The legal requirements for participation in a retirement plan are described in the publications below. However, your employer’s plan may have rules that permit you to join sooner than the law requires. Your plan’s booklet or Summary Plan Description (SPD) should have the rules that apply to you.
Many employers include automatic enrollment features in their retirement savings plans to encourage employees to save for their own retirement. You could be automatically enrolled in the plan on your first day of work. You must be given notice about the enrollment and the amount invested in your account. You will have the option to change the amount invested or to choose not to participate.