October

1 – Safe Harbor Notice must be distributed at least 30 days but not more then 90 days before beginning of the next plan year. (October 1 – December 1) – 12/31 Plan Year

15 – File Form 5500 if Extension was filed. – 12/31 Plan Year

15 – Return excess contributions for failed ADP/ACP test to avoid penalties – 7/31 Plan Year

31 - File Form 5500 with schedules and audited financial statements, if applicable – 3/31 Plan Year