How the Form 5500 due date works
For plans, group insurance arrangements (GIAs), and defined contribution group reporting arrangements (DCGs), Form 5500 is generally due by the last day of the seventh calendar month after the end of the plan or reporting year. A calendar-year plan normally has a July 31 deadline.
Direct Filing Entities other than GIAs and DCGs generally use a different 9½-month deadline, so the calculator includes a separate DFE option.