• January 1st
  • Start of the tax year (calendar) and Q1
  • Start of General Enrollment Period for Medicare Part A
    and Part B
  • Start of Open Enrollment Period for Medicare Advantage
• January 15th
  • Q4 estimated payment deadline for prior year 
• January 31st
  • Income tax return (Form 1040) filing and payment deadline
    to avoid late penalty for Q4 estimate, if it was not timely
    paid

• February 15th
  • Form W-4 filing deadline for taxpayers who claimed an
    exemption from income tax withholding for the prior year
    to continue their exemption in the current year

• March 31st
  • End of Medicare General Enrollment Period

• April 1st
  • Required Beginning Date (in year after year age 72 was
    reached) for RMDs*
  • Start of Q2

*SECURE act 2.0 may adjust the beginning date

• April 15th
  • Income tax return (Form 1040) filing and payment deadline
  • Gift tax return (Form 709) filing and payment deadline
  • Request for automatic six-month extension (Form 4868)
    filing deadline to extend filing Form 1040 and 709
  • Q1 estimated payment deadline
  • Deadline to contribute to an IRA or HSA for prior tax year

• June 15th
  • Q2 estimated payment deadline
• June 30th
  • • Deadline to file FAFSA for prior academic year

• July 1st
  • Start of Q3

• September 15th – 
  • Q3 estimated payment deadline
• September 30th
  • Determination date for identifying designated beneficiaries of retirement accounts

• October 1st
  • Start of Q4
  • First day to file FAFSA for upcoming academic year
• October 15th
  • Extended income tax return (Form 1040) and gift tax return
    (Form 709) filing deadline
  • Start of Open Enrollment Period for existing Medicare
    enrollees

• November 1st
  •  Start of Open Enrollment Period for Health Insurance Marketplace

• December 7th
  •  End of Open Enrollment Period for existing Medicare enrollees
• December 15th
  • • Health insurance marketplace deadline in order for
    coverage to begin on January 1st of the following year
• December 31st
  • Deadline for satisfying RMDs for current year
  • Deadline for dividing retirement accounts with multiple
    beneficiaries in order to use separate accounting
  • Deadline for completing gifts for tax year
  • End of tax year (calendar)