HR
2026 HR Compliance Calendar
Key federal HR, payroll, tax, and benefits deadlines for 2026. Use the arrows to move between months, or filter by category.
Calendar›2026›October
SunMonTueWedThuFriSat
123456789101112131415Extended individual & C-corp returns; Form 5500 extensionMedicare Part D creditable coverage notice16171819202122232425262728293031
October deadlines (2)
- 15Extended individual & C-corp returns; Form 5500 extensionTax Filing
Final deadline for extended 1040 and 1120 returns, and for Form 5500 filed under extension.
- 15Medicare Part D creditable coverage noticeACA / Health
Employers offering prescription drug coverage must notify Part D-eligible individuals whether coverage is creditable, before Oct 15.
Informational only: not legal or tax advice. Dates reflect federal statutory deadlines for calendar-year filers and roll to the next business day when they fall on a weekend. State and local deadlines vary. Always confirm with a licensed professional.
