What Are Employee Benefit Plans: ERISA Coverage, Claims, and Vesting

Employee benefit plans are employer-sponsored programs that give workers compensation beyond wages: health insurance, life and disability coverage, retirement savings, and a handful of less obvious benefits like tuition assistance and prepaid legal services. Federal law sorts these arrangements into two families. Welfare benefit plans cover health, disability, death, and similar needs. Pension benefit plans provide retirement income. No federal law requires an employer to offer either kind, but once an employer sets up a plan, the Employee Retirement Income Security Act of 1974 (ERISA) controls how it must be run and what rights you have as a participant.

ERISA does three main things: it forces plans to disclose financial and operational information to participants, holds the people running plans to strict standards of conduct, and lets participants take disputes to federal court.¹ The statute defines a welfare benefit plan broadly to include any employer-maintained program providing medical, surgical, or hospital care, or benefits for sickness, accident, disability, death, unemployment, vacation, training, day care, scholarship funds, or prepaid legal services. A pension benefit plan is any program that provides retirement income or defers income until after employment ends.²

Which Plans ERISA Does Not Cover

Not every benefit arrangement falls under ERISA. Government employee plans and church plans are the two largest carve-outs. Plans maintained solely to comply with workers’ compensation, unemployment, or disability laws are also exempt, along with plans maintained outside the United States primarily for nonresident aliens and unfunded excess benefit plans.³ If you work for a state agency, a public school district, or a church, your benefits operate under a different regulatory framework, and most of the protections described below do not apply the same way.

Health and Welfare Benefits

The welfare side of employee benefits covers everything that isn’t retirement. Medical, dental, and vision insurance are the most common. Life insurance pays a death benefit to whoever you designate. Disability insurance replaces part of your wages if illness or injury keeps you from working, usually in a short-term form covering a few months and a long-term form that can run until retirement age. Accidental death and dismemberment coverage pays fixed amounts for severe injuries or fatal accidents.

Less visible welfare benefits include employer-sponsored day care assistance, scholarship funds, apprenticeship and training programs, prepaid legal services, and vacation benefits.² If your employer funds or administers any of these through a formal plan, ERISA’s disclosure and fiduciary rules likely apply.

Mental Health Parity

The Mental Health Parity and Addiction Equity Act requires group health plans that cover mental health or substance use disorder treatment to do so on terms no more restrictive than coverage for medical and surgical care. Copays, visit limits, and preauthorization rules for mental health services cannot be tougher than the comparable rules on the medical side. For plan years beginning on or after January 1, 2026, updated regulations require plans to collect data on how treatment limitations actually affect access to mental health care and to take corrective action if the data reveals material disparities.⁴

COBRA Continuation Coverage

If you lose your job or have your hours reduced, COBRA lets you temporarily keep the group health insurance you had at work by paying the full premium yourself. You get 60 days from the date coverage ends to elect COBRA, and coverage is retroactive to the day your prior insurance stopped.⁵ Your spouse, former spouse, and dependent children can elect coverage even if you don’t.

The standard COBRA period for job loss or reduced hours is 18 months. Divorce, a dependent aging out of coverage, and certain other qualifying events extend the period to 36 months. Your first premium payment is due within 45 days of election. Later payments get a 30-day grace period from the due date. Missing a grace period deadline can end your COBRA rights for good, so treat those dates as hard cutoffs.⁶

Retirement Plans

ERISA recognizes two types of retirement plans. The difference between them comes down to who bears the investment risk.⁷

Defined Benefit Plans

A defined benefit plan, the traditional pension, promises you a specific monthly payment at retirement, typically calculated from a formula based on your salary history and years of service. Your employer funds the plan and manages the investments so there’s enough money to pay everyone’s benefit. You get a predictable income stream; the employer absorbs market risk.

When a private-sector defined benefit plan fails, the Pension Benefit Guaranty Corporation steps in to pay benefits up to a statutory maximum. For 2026, a participant starting a straight-life annuity at age 65 can receive up to $7,789.77 per month from the PBGC.⁸ The ceiling rises if you start benefits later and drops if you start earlier. This guarantee applies only to single-employer plans; multiemployer plans operate under a separate, less generous insurance program.

Defined Contribution Plans

Defined contribution plans, including 401(k), 403(b), and profit-sharing arrangements, work through individual accounts rather than a promised benefit.⁷ You contribute a share of pre-tax pay, your employer may add matching funds, and your eventual balance depends on how much went in and how the investments performed. You carry the investment risk. You also get portability: when you leave, you can roll the balance into a new employer’s plan or an IRA.

For 2026, you can defer up to $24,500 of your own salary into a 401(k) or 403(b). Workers 50 or older can add $8,000 in catch-up contributions.⁹ Under SECURE 2.0, workers aged 60 through 63 qualify for an enhanced catch-up above the standard amount. The total of all contributions to your account from every source, including employer matches, cannot exceed $72,000 for the year.¹⁰

Vesting

Your own contributions are always 100% yours. Employer contributions may vest over time, meaning you earn ownership gradually. Federal law caps how long employers can make you wait:

Three-year cliff vesting: you own nothing until you complete three years of service, then you become fully vested all at once.
Six-year graded vesting: you vest 20% after two years, with the percentage rising each year until you reach 100% at six years.

A plan can vest you faster, but not slower.¹¹ If you’re considering a job change, check where you stand. Leaving a few months short of full vesting can mean forfeiting thousands of dollars in employer contributions.

Early Withdrawal Rules

Contributions to a traditional 401(k) or 403(b) reduce your taxable income the year you make them, and the investments grow tax-deferred until you take them out. Distributions are then taxed as ordinary income. Pull money out before age 59½ and you generally owe a 10% additional tax on top of regular income tax.¹²

Several exceptions waive that 10% penalty:

Separation from service at age 55 or later (withdrawals from that employer’s plan only)
Total and permanent disability, or terminal illness
A series of substantially equal periodic payments based on your life expectancy
Unreimbursed medical expenses that exceed 7.5% of your adjusted gross income
Distributions to a spouse or former spouse under a qualified domestic relations order
Distributions to offset economic losses from a federally declared disaster
Distributions to domestic abuse victims and for personal emergencies, for distributions made after December 31, 2023

These exceptions apply to the penalty only. You still owe regular income tax on the distribution.¹²

Some 401(k) plans also allow hardship distributions while you’re still employed. The bar is high: you must show an immediate and heavy financial need, and the withdrawal is limited to the amount necessary. The IRS recognizes safe-harbor categories that automatically qualify: certain medical expenses, costs of purchasing a primary home (not mortgage payments), post-secondary tuition and room and board, payments to prevent eviction or foreclosure, funeral expenses, and certain home repair costs. You’ll need a written statement that the need can’t be met from other resources like insurance, asset sales, or plan loans.¹³

Documents You’re Entitled To

ERISA requires plan administrators to keep participants informed through several mandatory documents. The Summary Plan Description is the most important. It explains your eligibility, how benefits are calculated, how to file a claim, and what to do if a claim is denied. It must be written in plain language. When plan terms change, the administrator must send you a Summary of Material Modifications within 210 days after the close of the plan year in which the change was made.¹⁴

Each year, you should also receive a Summary Annual Report, a condensed version of the plan’s annual financial filing. It comes at no cost, and you can request the full annual report if you want detail on plan assets and investments.¹⁵ Behind the scenes, most ERISA plans file Form 5500 annually with the Department of Labor, the IRS, and the PBGC, creating a public record of the plan’s financial condition and administrative expenses.¹⁶

Filing Claims and Appealing Denials

When you submit a claim and it gets denied, ERISA gives you a structured process to challenge the decision. Response timelines vary by claim type:

Standard claims: 90 days for the plan to respond, with a possible 90-day extension for special circumstances
Urgent health care claims: 72 hours
Pre-service health claims: 15 days, with a possible 15-day extension
Post-service health claims: 30 days, with a possible 15-day extension
Disability claims: 45 days, with up to two 30-day extensions

Once you get a denial, you have at least 60 days to file an internal appeal for most plan types, or 180 days for group health plan claims.¹⁷ The denial notice itself must explain the specific reasons the claim was rejected, the plan provisions it relied on, and the steps for appeal. Read these letters carefully. The reasons stated in the denial define the grounds the plan can defend later if the dispute reaches court.

After you exhaust the plan’s internal appeal, ERISA gives you the right to file suit in federal court. ERISA’s preemption clause overrides state laws that “relate to” an employee benefit plan,¹⁸ so federal court under ERISA is typically the only path, and remedies are generally limited to recovery of the denied benefits and attorney’s fees rather than punitive damages or emotional distress awards. Courts usually review the plan administrator’s decision on the record rather than starting fresh, which means the evidence you submit during the internal appeal often matters more than anything you might present later.

What Plan Managers Owe You

Anyone who exercises decision-making authority over a plan’s management, assets, or administration is a fiduciary under ERISA, whether or not they carry that title.¹⁹ The label follows the function.

The statute imposes two core duties. The duty of loyalty requires fiduciaries to act solely in the interest of participants and for the exclusive purpose of providing benefits and paying reasonable plan expenses. The prudent-person standard requires the level of care, skill, and diligence that a knowledgeable person familiar with such matters would use in similar circumstances.²⁰ Fiduciaries must also diversify plan investments to minimize the risk of large losses and must follow the plan’s governing documents. These obligations are ongoing, not one-time: fiduciaries have a continuing duty to monitor plan investments over time. Fiduciaries who breach these duties face personal liability and can be required to restore any losses the plan suffered.

ERISA also flatly bans certain dealings between a plan and parties who have a relationship with it, such as the employer, plan officers, or service providers. A fiduciary cannot cause the plan to:

Sell, exchange, or lease property with an interested party
Lend money or extend credit to an interested party
Transfer plan assets for the benefit of an interested party
Acquire employer stock or real property beyond the limits set by law

These rules apply regardless of whether the transaction seems fair or even beneficial to the plan.²¹ The Department of Labor can grant exemptions for specific transactions, but the default is a blanket prohibition.

Your Health Information

When your employer sponsors a group health plan, the individually identifiable health information collected from participants is protected under the HIPAA Privacy and Security Rules. If your employer handles plan administration internally, plan documents must separate employees who perform plan administration from those who don’t, prohibit using health data for employment decisions, and provide security measures for electronic records. Where the employer doesn’t perform administrative functions, its access to individual health data is sharply limited to enrollment information and summary data used for plan modifications or premium bids.²² The practical takeaway: your HR department is not supposed to have free access to your medical claims data just because the company sponsors the plan.

1
Office of the Law Revision Counsel. 29 USC 1001 – Congressional Findings and Declaration of Policy
2
Office of the Law Revision Counsel. 29 USC 1002 – Definitions
3
U.S. Department of Labor. Employee Retirement Income Security Act (ERISA)
4
U.S. Department of Labor. Fact Sheet: Final Rules Under the Mental Health Parity and Addiction Equity Act (MHPAEA)
5
U.S. Department of Labor. COBRA Continuation Coverage
6
U.S. Department of Labor. FAQs on COBRA Continuation Health Coverage for Workers
7
U.S. Department of Labor. Types of Retirement Plans
8
Pension Benefit Guaranty Corporation. Maximum Monthly Guarantee Tables
9
Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026
10
Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs
11
Internal Revenue Service. Issue Snapshot – Vesting Schedules for Matching Contributions
12
Internal Revenue Service. Additional Tax on Early Distributions From Retirement Plans Other Than IRAs
13
Internal Revenue Service. Retirement Topics – Hardship Distributions
14
Internal Revenue Service. 401(k) Resource Guide – Plan Participants – Summary Plan Description
15
U.S. Department of Labor. Plan Information
16
U.S. Department of Labor. Form 5500 Series
17
eCFR. 29 CFR 2560.503-1 – Claims Procedure
18
Office of the Law Revision Counsel. 29 USC 1144 – Other Laws
19
U.S. Department of Labor. Fiduciary Responsibilities
20
Office of the Law Revision Counsel. 29 USC 1104 – Fiduciary Duties
21
Office of the Law Revision Counsel. 29 USC 1106 – Prohibited Transactions
22
U.S. Department of Health and Human Services. HIPAA Privacy and Security and Workplace Wellness Programs