Deadline

Item

Action

Affected Plans

March 1

(60 days after the beginning of the plan year)

Medicare Part D Creditable Coverage Disclosure

Deadline for employers that provide prescription drug coverage to Medicare Part D eligible individuals to disclose to the Centers for Medicaid and Medicare Services (CMS) whether the coverage is “creditable prescription drug coverage” by completing the Online Disclosure to CMS Form at

Health and Welfare Plans that provide prescription drug coverage to Medicare Part D eligible individuals

March 15

Plan Contribution Deadline

Deadline for corporate employer contributions to be made to plan trusts in order for such amounts to be deductible on corporate tax returns (assuming the employer is operating on a calendar-year fiscal year). Note that this deadline may be extended if an extension is obtained for the corporate tax return. 

Qualified Retirement Plans*

March 15
(2 ½ months after the plan year)

Excess Contributions

Deadline for plan administrator  to distribute any excess contributions and earnings from the prior year to avoid 10% excise tax on employer (other than eligible automatic contribution arrangements (EACAs)).

401(k) Plans Other Than EACAs

March 31
(last day of 3rd month following the end of the prior plan year)

Certification of Adjusted Funding Target Attainment Percentage (AFTAP)

Deadline for actuary to certify AFTAP to avoid presumption that AFTAP is 10 points less than prior year AFTAP.  

Defined Benefit Plans

March 31

IRS Form 1095-B Individual Statements

Deadline for providers of minimum essential coverage to distribute forms used to report to responsible individuals the months during the year that the individuals satisfied the individual mandate by enrolling in minimum essential coverage. This deadline was extended from its original deadline of January 31.
Note that self-insured plan sponsors that employed an average of at least 50 full-time employees  in 2015 (also known as “Applicable Large Employers” or “ALEs”) can report this information on Form 1095-C.  Fully insured plan sponsors that are not ALEs are not required to distribute Form 1095-B, which are distributed by the group health plan insurers.

Self-Insured Group Health Plans and Group Health Plan Insurers

IRS Form 1095-C Individual Statements

Deadline for ALEs to report to provide a written statement to employees indicating whether the ALEs offered an opportunity to enroll in (and whether the employee did enroll in) minimum essential coverage under the ALE’s sponsored plan. This deadline was extended from its original deadline of January 31.

Applicable Large Employers

April 1

Age 70 ½ Distribution Requirements

Deadline for plan administrator to distribute prior year’s required minimum distribution for any terminated employee who reached age 70 ½ or older during the prior year.

Qualified Retirement Plans

April 15

Excess Deferrals

Deadline for plan to distribute prior year’s deferrals in excess of Internal Revenue Code (IRC) §402(g) annual dollar limit and related earnings.

401(k) Plans

April 15
(105 days after the end of the plan year)

PBGC 4010 Filing

Deadline for contributing sponsors (and each controlled group member) to file PBGC Form 4010 if:
1) Any single-employer plan in the contributing sponsor’s controlled group had a prior year AFTAP of less than 80%;
2) Any single-employer plan in the contributing sponsor’s controlled group fails to make a required installment or other required payments to a plan, and as a result, a lien is imposed pursuant to ERISA section 303(k)(1) or IRC section 430(k)(1); or
3) The IRS has granted funding waivers of more than $1 million to any single-employer plan in the contributing sponsor’s controlled group and any portion of such waiver is still outstanding. 

Defined Benefit Plans

April 29
(no later than 120 days after the end of the plan year)

Annual Funding Notice

Deadline for the plan administrator to provide a plan funding notice to the PBGC, to each plan participant and beneficiary and to each employer that has an obligation to contribute under the plan.

Defined Benefit Plans