| October 3 | QSEHRA Notice Deadline (for QSEHRAs that begin January 1, 2023)
RDS Application Due to CMS (for plan years beginning in 1/1/2023) |
| October 10 | Columbus Day/Indigenous Peoples’ Day |
| October 14 | Medicare Part D Notice of Creditable Coverage Delivered to Plan Participants |
| October 15 | Retirement Plans Due (if filed extension) |
| October 17 | National Boss’s Day (observed) |
| October 31 | Forms 720 and 941 Due
Halloween |