Employee Benefits Administration: Duties, Disclosures, and Form 5500

Employee benefits administration is the work of running a company’s retirement and health plans in compliance with federal law: enrolling participants, keeping their data accurate, testing the plan for fairness, delivering required notices, filing annual returns, and correcting mistakes before regulators find them. The stakes are concrete. A late Form 5500 alone can draw Department of Labor civil penalties of up to $2,586 per day with no cap, and the IRS stacks its own $250-per-day penalty (capped at $150,000) on top for the same failure.¹ Getting the job right means knowing which laws apply to your plan, what documents have to go out and when, and which correction program to use when something slips.

The Federal Laws That Set the Rules

The Employee Retirement Income Security Act (ERISA), codified beginning at 29 U.S.C. § 1001, sets minimum standards for most voluntarily established retirement and health plans in private industry. It governs how plan funds are managed and what information participants must receive.² If you run a 401(k), a defined benefit pension, or a self-funded health plan, ERISA sets your fiduciary duties, reporting obligations, and disclosure deadlines.

COBRA, embedded in ERISA at 29 U.S.C. § 1161, requires group health plan sponsors with 20 or more employees to offer temporary continuation coverage when a qualifying event would otherwise end a participant’s benefits.³ Qualifying events include termination, reduction in hours, divorce, the covered employee’s death, and a dependent aging out.⁴ Coverage lasts 18 months for job loss or reduced hours and up to 36 months for events like divorce or the employee’s death.

The Affordable Care Act applies to any employer with 50 or more full-time or full-time-equivalent employees. Those employers must offer affordable coverage meeting minimum value standards or face an employer shared responsibility payment under IRC § 4980H — $3,340 per full-time employee (minus the first 30) under § 4980H(a), or $5,010 per employee who receives subsidized Exchange coverage under § 4980H(b), for 2026.⁵

The Mental Health Parity and Addiction Equity Act at 29 U.S.C. § 1185a prohibits group health plans from imposing financial requirements or treatment limitations on mental health and substance use disorder benefits that are more restrictive than those applied to medical and surgical benefits.⁶ For plan years beginning on or after January 1, 2026, plans must also document comparative analyses of nonquantitative treatment limitations, evaluate access-related data, and have a named fiduciary certify compliance.

Fiduciary Duty and the Fidelity Bond

Anyone who exercises discretion over a plan’s management, assets, or administration is a fiduciary under ERISA. That designation carries a duty to act solely in the interest of participants, keep expenses reasonable, and follow the plan document. Fiduciary breaches can result in personal liability for losses to the plan.

ERISA also requires a concrete financial safeguard. Under 29 U.S.C. § 1112, every person who handles plan funds or property must be covered by a fidelity bond equal to at least 10 percent of the funds they handle, with a minimum of $1,000 and a maximum of $500,000.⁷ For plans that hold employer securities or are pooled employer plans, the cap rises to $1 million.⁸ The bond protects the plan against fraud or dishonesty by the bonded person. It does not protect the fiduciary personally.

Fiduciary liability insurance is a separate product. It covers the fiduciary’s own defense costs and liability if they are accused of breaching their duties. ERISA does not require it, but many administrators carry it because fiduciary breach lawsuits can involve millions in plan losses. The bond reimburses the plan for theft; the insurance reimburses the fiduciary for mistakes.

Enrollment, Life Events, and Day-to-Day Recordkeeping

New-hire enrollment is the most visible administrative task. It involves collecting personal data, explaining coverage options, and getting elections completed inside the plan’s eligibility window. Most plans set that window at 30 to 60 days from the date of hire, though the timeframe comes from the plan document rather than a single federal rule.

Outside of open enrollment, employees can change coverage when a qualifying life event occurs. The common triggers are marriage, birth or adoption, divorce, loss of other coverage, and a change in a spouse’s employment status.⁹ The administrator verifies the event, processes the change, and pushes updated data to carriers fast enough to prevent gaps.

Between those events, the constant work is keeping employer records and carrier records aligned. Discrepancies in names, dependent status, or hours-worked data cause denied claims or coverage of ineligible people at the plan’s expense. When an employee falls below the plan’s hours threshold, the administrator must trigger removal and, where applicable, start COBRA notification.

Qualified Medical Child Support Orders

When a plan receives a medical child support order, the administrator determines whether it qualifies as a QMCSO. The plan must have written procedures for that determination, and the administrator must notify both the participant and the child’s custodial parent of the order and the procedures.¹⁰ A qualifying order requires enrollment of the child as if the order were part of the plan. An order cannot be rejected because the participant is still in a waiting period; coverage must begin when the waiting period ends. When a National Medical Support Notice arrives from a state agency, the administrator has 40 business days to complete and return the Plan Administrator Response.

Non-Discrimination Testing

Federal law prohibits benefit plans from disproportionately favoring highly compensated employees. For 2026, an HCE is generally someone who owned more than 5 percent of the employer at any time during the current or preceding year, or who earned more than $160,000 in the preceding year.¹¹

Retirement plans like 401(k)s face two key annual tests:

The Actual Deferral Percentage (ADP) test compares the average elective deferral rates of HCEs and non-highly compensated employees. The HCE group’s average cannot exceed the greater of 125 percent of the NHCE average or the NHCE average plus 2 percentage points, whichever limit is lower under the alternative test.
The Actual Contribution Percentage (ACP) test applies the same math to employer matching contributions and after-tax employee contributions.

Failing either test has teeth. Excess contributions must be refunded to HCEs or offset by additional employer contributions to NHCEs. If excess amounts are not corrected within two and a half months after the plan year ends (six months for eligible automatic contribution arrangements), the employer owes a 10 percent excise tax on the excess. If the failure is not fully corrected within 12 months, the plan risks losing its tax-qualified status, which would make all deferred contributions immediately taxable to participants.¹¹

Self-insured health plans face a separate set of rules under IRC § 105(h). The plan must pass an eligibility test showing it does not discriminate in favor of highly compensated individuals and a benefits test confirming that every benefit available to HCIs is also available to all other participants on the same terms.

Required Disclosures and When They Go Out

Summary Plan Description

The Summary Plan Description translates the plan’s legal terms into language participants can understand. It must be distributed to new participants within 90 days of becoming covered, or within 120 days of the plan first becoming subject to ERISA, whichever is later.¹² Updated SPDs must be furnished every five years if the plan has been amended during that period, or every ten years if there have been no amendments.

Summary of Benefits and Coverage

The ACA added a separate disclosure requirement. The Summary of Benefits and Coverage follows a standardized template and must include specific coverage examples, cost-sharing details, and network information.¹³ Distribution deadlines:

Upon application, no later than seven business days after receiving an enrollment application.
For automatic renewal, at least 30 days before the new plan year begins.
For special enrollment, no later than 90 days from the enrollment date.
Upon request, within seven business days.

If the plan makes a material change to benefits outside of renewal, affected enrollees must be notified at least 60 days before the change takes effect.

Summary Annual Report

After the Form 5500 is filed, the plan administrator distributes a Summary Annual Report summarizing that year’s financial activity. It is due within nine months after the end of the plan year, or within two months after the extended Form 5500 filing deadline if an extension was used. For a calendar-year plan without an extension, that is September 30; with an extension, December 15.

How Disclosures Can Be Delivered

ERISA disclosure rules at 29 CFR § 2520.104b-1 accept hand delivery at the worksite, first-class mail, and electronic delivery.¹⁴ Electronic delivery is available for employees who have regular access to the employer’s electronic information system as part of their duties, or who affirmatively consent. The regulation requires measures to confirm actual receipt, protect confidentiality, and provide a paper copy on request.

Form 5500 Filing

Deadlines and Extensions

The Form 5500 annual return is due seven months after the end of the plan year, which is July 31 for calendar-year plans. Filing Form 5558 before the due date grants an automatic two-and-a-half-month extension, pushing the calendar-year deadline to October 15.¹⁵ If the plan year matches the employer’s tax year and the employer already has an income tax filing extension that runs past the Form 5500 due date, the Form 5500 is automatically extended to match without a separate Form 5558.

Contents and Submission

Form 5500 requires detailed financial statements, schedules of assets, and accurate counts of active and retired participants. Large plans (generally 100 or more participants) must attach Schedule H with a full breakdown of plan assets, liabilities, income, and expenses.¹⁶ Small plans file Schedule I, a simplified financial information form. All filings go through the EFAST2 electronic system, which issues a tracking number on submission.¹⁷

Independent Audit

Plans with 100 or more participants at the beginning of the plan year generally must include an audit by an independent qualified public accountant with their Form 5500 filing.¹⁸ The auditor reviews the plan’s financial statements and issues an opinion (unmodified, qualified, disclaimer, or adverse) reported on Schedule H. Plans that hover near the threshold should know the 80-to-120 participant rule: if your participant count falls in that range at the start of the plan year and you filed as a small plan the previous year, you can elect to keep filing as a small plan, avoiding the audit requirement for that year.¹⁹

Penalties for Late Filings

Penalties for missing a Form 5500 deadline come from two directions. The Department of Labor can assess civil penalties under ERISA § 502(c)(2) of up to $2,586 per day from the day after the deadline.²⁰ The IRS separately imposes a penalty of $250 per day, capped at $150,000, for failures under IRC § 6058.¹ The two penalties run at the same time.

ACA Employer Reporting

Applicable large employers must file annual information returns with the IRS documenting the coverage they offered.⁵ Two forms are involved: the 1094-C is the transmittal summary, and the 1095-C reports coverage details for each full-time employee. Employers with 10 or more information returns must file electronically.

Employee statements (the 1095-C) are due to employees by March 2 for the preceding coverage year, with the IRS filing following shortly after. Late or incorrect filing penalties scale with the delay: $60 per return if corrected within 30 days, $130 if corrected by August 1, and $340 per return after that.²¹ Intentional disregard raises the penalty to $680 per return with no cap.

Mental Health Parity Compliance

MHPAEA requires group health plans to apply the same financial requirements and treatment limitations to mental health and substance use disorder benefits as they do to medical and surgical benefits.⁶ Copays, deductibles, visit limits, and prior authorization requirements cannot be more restrictive for behavioral health than for comparable medical services.

Starting with plan years beginning on or after January 1, 2026, the compliance bar rises. Plans must document comparative analyses of every nonquantitative treatment limitation applied to mental health benefits, collect data on claims denials and network adequacy, and take corrective action if the data reveals material differences in access. A named fiduciary must certify that the analysis was conducted through a prudent process. If the Secretary of Labor finds noncompliance, the plan must notify all enrolled participants within seven business days of receiving the determination.

Correcting Compliance Failures

IRS Voluntary Correction Program

The IRS Voluntary Correction Program lets plan sponsors fix operational errors or plan document mistakes before they become audit findings. Common corrections include failed non-discrimination tests, missed required minimum distributions, and errors applying the plan’s eligibility rules.²² You submit a description of the failure, the proposed correction, and a user fee (ranging from $2,000 to $4,000 depending on plan assets) through Pay.gov. The IRS issues a compliance statement that includes a 150-day deadline to complete all corrective actions. VCP does not cover late Form 5500 filings; those go through a separate DOL program.

DOL Delinquent Filer Voluntary Compliance Program

The DFVCP offers reduced penalties for administrators who voluntarily file overdue Form 5500s before the DOL contacts them about the delinquency.²³ The basic penalty is $10 per day, capped at $750 per filing for small plans and $2,000 per filing for large plans. Per-plan caps are $1,500 for small plans and $4,000 for large plans.

To participate, you file the delinquent Form 5500 through EFAST2 with the “DFVC Program” box checked, then use the DFVCP online calculator to submit payment. Paper submissions are not accepted. The program is only available if you have not already received a Notice of Intent to Assess a Penalty. Once that notice arrives, you lose both eligibility for DFVCP and the room to negotiate the amount.

Choosing How to Administer the Plan

Who does the work affects who carries the compliance burden. An in-house model keeps enrollment, carrier communications, and filing inside the HR department. That gives the employer direct control but demands internal expertise in ERISA, ACA, and COBRA rules; for smaller organizations without dedicated compliance staff, the risk of missed deadlines climbs quickly.

A third-party administrator handles specialized tasks like claims processing, COBRA notifications, and Form 5500 preparation. The employer remains the plan sponsor and keeps fiduciary responsibility, but offloads the technical execution. The TPA typically uses approved software to prepare and submit filings through EFAST2 on behalf of the plan.²⁴

A professional employer organization operates through co-employment, becoming the employer of record for benefits purposes. That gives smaller companies access to group rates and shifts much of the administrative burden and compliance liability to the PEO. Registration and licensing requirements for PEOs vary by state.

1
Internal Revenue Service. Form 5500 Corner
2
Office of the Law Revision Counsel. 29 USC 1001 – Congressional Findings and Declaration of Policy
3
Office of the Law Revision Counsel. 29 USC 1161 – Plans Must Provide Continuation Coverage to Certain Individuals
4
Centers for Medicare and Medicaid Services. COBRA Continuation Coverage Questions and Answers
5
Internal Revenue Service. Affordable Care Act Tax Provisions for Employers
6
Office of the Law Revision Counsel. 29 USC 1185a – Parity in Mental Health and Substance Use Disorder Benefits
7
Office of the Law Revision Counsel. 29 USC 1112 – Bonding
8
U.S. Department of Labor. Protect Your Employee Benefit Plan With an ERISA Fidelity Bond
9
HealthCare.gov. Qualifying Life Event
10
U.S. Department of Labor. Qualified Medical Child Support Orders
11
Internal Revenue Service. 401(k) Plan Fix-It Guide – The Plan Failed the 401(k) ADP and ACP Nondiscrimination Tests
12
Office of the Law Revision Counsel. 29 USC 1024 – Filing With Secretary and Furnishing Information to Participants and Beneficiaries
13
Centers for Medicare and Medicaid Services. Summary of Benefits and Coverage Overview
14
eCFR. 29 CFR 2520.104b-1 – Disclosure
15
Internal Revenue Service. Form 5558 – Application for Extension of Time to File Certain Employee Plan Returns
16
eCFR. 29 CFR 2520.103-1 – Contents of the Annual Report
17
U.S. Department of Labor. EFAST2 – ERISA Filing Acceptance System
18
U.S. Department of Labor. Selecting An Auditor For Your Employee Benefit Plan
19
U.S. Department of Labor. Small Pension Plan Audit Waiver FAQ
20
U.S. Department of Labor. Enforcement Manual – Civil Penalties
21
Internal Revenue Service. Information Return Penalties
22
Internal Revenue Service. Voluntary Correction Program – General Description
23
U.S. Department of Labor. Delinquent Filer Voluntary Compliance Program
24
U.S. Department of Labor. EFAST2 Form 5500 Electronic Filing for Small Businesses FAQs