Critical Retirement Plan Dates and Deadlines for 2021

Workplace retirement plans are governed by various dates and deadlines that all 401(k) plan administrators should be keenly aware of. Below are important dates to keep in mind in the upcoming year. Coordinate the timely completion of important retirement plan tasks with your recordkeeper or third-party administrator.

Please note: The list below is not exhaustive, and dates are based on a calendar-year plan.
 

January
15: Begin to prepare your plan’s census data to ensure accuracy and completeness. Your plan’s third-party administrator or recordkeeper will use this to perform upcoming nondiscrimination testing.
31: Form 1099-R due to participants to report 2020 distributions
 

March
15:
Deadline for ADP/ACP corrective distributions to be processed without excise penalty
15: Fund employer contributions (for partnerships)
 

April
15:
Deadline to distribute 2020 402(g) excess deferrals
15: Fund employer contributions (for corporations)
 

July
31:
Deadline to file IRS Form 5500 (or Form 5558, to request an extension for filing Form 5500)
 

September
15:
Fund employer contributions (if extension was filed)
 

October
1:
IRS deadline to establish a new safe harbor 401(k) plan for the current calendar year
15: IRS extended deadline to file Form 5500 (for calendar year plans, if extension was filed)
 

November
1:
Deadline to provide annual SIMPLE IRA plan notices to eligible employees (if applicable)
 

December
1:
Deadline for providing annual safe harbor, qualified default investment alternative, and qualified automatic contribution arrangement notices to plan participants (if applicable)
31: Deadline for processing corrective distributions (excise penalty will apply)
31: Deadline for participants to take required minimum distributions