Retirement Plan Deadlines

IRA (Traditional or Roth)

Deadline to establish the plan – N/A
Deadline to fund the plan – April 15th of the following year

SEP IRA

Deadline to establish the plan – due date of the tax return, including extensions
Deadline to fund the plan – due date of the tax return, including extensions

Simple IRA

Deadline to establish the plan – October 1st of that year (for example a Simple IRA for 2023 needs to be opened by 10/1/2023)
Deadline to fund the plan –

• Employee contributions and Self-Employed Deferral Contributions – must be withheld from pay by December 31st and remitted to the investment firm as soon as reasonably possible
• Employer contribution and Self-Employment Matching Contribution – must be made by the tax return due date, including extensions

401(k)

Deadline to establish the plan – October 1st of that year for safe harbor plans, otherwise December 31st of that year.
Deadline to fund the plan –

• Employee contributions and Self-Employed Deferral Contributions – must be withheld from pay by December 31st and remitted to the investment firm as soon as reasonably possible
• Employer contribution and Self-Employment Matching Contribution – must be made by the tax return due date, including extensions