December 31st, 2018
Required Minimum Distributions due under IRC Section 401(a)(9).
Deadline for processing corrective distributions for failed 2017 ADP/ACP test with 10% excise tax.
Deadline for correcting a failed 2017 ADP/ACP test with qualified nonelective contributions (QNEC).
Deadline for an amendment to convert existing 401(k) plan to safe harbor design for next plan year.
Deadline for an amendment to remove safe harbor status for the next plan year.
Deadline for amending the plan for discretionary changes implemented during the plan year (certain exceptions apply).