ERISA plans are employer-sponsored retirement and health benefit programs governed by the Employee Retirement Income Security Act of 1974, a federal law that sets minimum standards for how private-sector employers run these plans and gives workers enforceable rights to information, fair claims decisions, and federal court review.1Office of the Law Revision Counsel. 29 U.S.C. Chapter 18 – Employee Retirement Income Security Program If your employer offers a 401(k), a pension, group health coverage, disability insurance, or life insurance, ERISA almost certainly shapes what you’re entitled to and how you enforce it.
What ERISA Covers
ERISA reaches two broad categories of employer-sponsored benefits.2U.S. Department of Labor. Employee Retirement Income Security Act (ERISA)
Pension benefit plans provide retirement income or defer income until you leave your job. A defined benefit plan promises a specific monthly payment at retirement based on your salary and years of service; the employer carries the investment risk. A defined contribution plan, such as a 401(k) or profit-sharing account, depends on contributions and investment returns, and you carry the risk.
Welfare benefit plans cover non-retirement benefits: medical, dental, surgical, and hospital coverage; disability, accident, and sickness benefits; life insurance and death benefits; and things like apprenticeship programs, dependent care assistance, vacation benefits, scholarship funds, and prepaid legal services. Welfare plans have to follow ERISA’s administrative rules but aren’t subject to the same funding and vesting requirements as pension plans.2U.S. Department of Labor. Employee Retirement Income Security Act (ERISA)
Plans That Are Not ERISA Plans
ERISA doesn’t cover everything that looks like a benefit plan. The statute exempts:
- Plans established by federal, state, or local government employers
- Church plans, unless the church has elected ERISA coverage
- Plans maintained solely to comply with workers’ compensation, unemployment, or disability insurance laws
- Plans maintained outside the United States primarily for nonresident aliens
- Unfunded excess benefit plans that provide benefits above tax-qualified plan limits
These exemptions matter because if you work for a state agency, a public school, or a church, your rights come from a different set of rules and ERISA’s protections generally don’t apply.3Office of the Law Revision Counsel. 29 U.S. Code 1003 – Coverage
What the Plan Owes You: Fiduciary Duties
Anyone with discretionary authority over an ERISA plan or its assets is a fiduciary. That includes plan administrators, trustees, investment managers, and sometimes the employer itself. Titles don’t decide it. Function does.
Fiduciaries have to act “with the care, skill, prudence, and diligence under the circumstances then prevailing that a prudent man acting in a like capacity and familiar with such matters would use.”4Office of the Law Revision Counsel. 29 U.S. Code 1104 – Fiduciary Duties Every decision must be made solely in the interest of participants and beneficiaries, and exclusively to provide benefits and cover reasonable plan expenses. Fiduciaries also have to diversify investments, follow the plan documents when those documents are consistent with ERISA, and avoid a list of prohibited transactions with the employer, service providers, and their relatives.5Office of the Law Revision Counsel. 29 U.S. Code 1106 – Prohibited Transactions
When fiduciaries breach these duties, they are personally liable to restore any losses to the plan and to give back any profits earned through misuse of plan assets.6U.S. Department of Labor. Fiduciary Responsibilities A court can remove them and bar them from serving other plans. Prohibited transactions carry an excise tax of 15 percent of the amount involved for each year the violation continues, rising to 100 percent if not corrected.7Office of the Law Revision Counsel. 26 U.S. Code 4975 – Tax on Prohibited Transactions Willful false statements or concealment can bring criminal penalties up to $100,000 and 10 years in prison for individuals, or $500,000 for organizations.8Office of the Law Revision Counsel. 29 U.S. Code 1131 – Criminal Penalties
When You’re In and When the Money Is Yours
ERISA sets floors for participation and vesting. Plans can be more generous. They can’t be more restrictive.
Eligibility
Most retirement plans cannot require you to be older than 21 or to have completed more than one year of service before you become eligible.9U.S. Department of Labor. FAQs About Retirement Plans and ERISA A year of service generally means a 12-month period with at least 1,000 hours worked. A traditional 401(k) may require two years of service before you receive employer contributions, but only if those contributions vest 100 percent right after that second year; you still have to be allowed to make your own elective deferrals after one year.10Internal Revenue Service. 401(k) Plan Qualification Requirements
Vesting
Vesting is when employer contributions become permanently yours. Your own contributions, including 401(k) salary deferrals, are always 100 percent vested immediately. Employer contributions follow schedules that depend on the plan type.
For defined benefit plans, an employer can use cliff vesting (100 percent vested after five years, nothing before) or graded vesting (at least 20 percent after three years, then 40, 60, 80, and 100 percent after seven).
For defined contribution plans, the schedules are faster: cliff vesting after three years, or graded vesting starting at 20 percent after two years and reaching 100 percent after six.9U.S. Department of Labor. FAQs About Retirement Plans and ERISA
Some plan designs vest employer money immediately. Safe harbor 401(k) plans require 100 percent vesting of matching and non-elective employer contributions at all times, and SIMPLE 401(k) plans do the same. A Qualified Automatic Contribution Arrangement (QACA) safe harbor is a narrow exception, allowing employer contributions to vest after up to two years of service.11Internal Revenue Service. Issue Snapshot – Vesting Schedules for Matching Contributions
Documents You Should Receive
ERISA requires plan administrators to give you specific documents on set timelines.12U.S. Department of Labor Employee Benefits Security Administration. Reporting and Disclosure Guide for Employee Benefit Plans
The Summary Plan Description (SPD) is the main document. It explains what benefits are offered, how to file a claim, how to appeal a denial, and when you could lose benefits. New participants must receive it within 90 days of becoming covered.
A Summary of Material Modifications tells you about plan changes and must be sent within 210 days after the end of the plan year in which the change was adopted.
The Summary Annual Report summarizes the plan’s finances and must go out within nine months after the plan year ends, or two months after an approved Form 5500 extension. Defined benefit pension plans covered by PBGC insurance provide an annual funding notice instead.
Group health plans also provide a Summary of Benefits and Coverage (SBC), a plain-language document that lets you compare health plans. It comes with enrollment materials, at least 30 days before automatic renewal, and within seven business days if you ask.13eCFR. 45 CFR 147.200 – Summary of Benefits and Coverage and Uniform Glossary
You can request copies of plan documents in writing at any time, including the SPD, the trust agreement, and the most recent Form 5500. The administrator has 30 days to send them and faces daily civil penalties for missing that deadline.
Filing a Claim and Appealing a Denial
Federal regulations set deadlines for how quickly an ERISA plan has to decide a claim:
- Urgent care claims: 72 hours
- Non-urgent pre-service claims (approval needed before treatment): 15 days, with one possible 15-day extension
- Post-service claims (filed after treatment): 30 days, with one possible 15-day extension
If the plan denies your claim, the denial notice has to state the specific reasons, cite the plan provisions relied on, and describe how to appeal.14eCFR. 29 CFR 2560.503-1 – Claims Procedure
You then have at least 180 days to file an appeal.15U.S. Department of Labor. Benefit Claims Procedure Regulation FAQs During the appeal you can submit new evidence and written comments, and the plan has to consider them. The plan then has to decide within 72 hours for urgent care, 30 days for pre-service claims, and 60 days for post-service claims.
Don’t skip this step. Courts generally require you to exhaust the plan’s internal appeal process before you can sue, and missing the 180-day window can bar a lawsuit later.14eCFR. 29 CFR 2560.503-1 – Claims Procedure
Your Right to Sue Under ERISA
ERISA gives participants and beneficiaries the right to file a civil lawsuit in federal court to recover benefits due under the plan, to enforce their rights, or to clarify their right to future benefits. You can also seek an injunction to stop a practice that violates ERISA or the plan’s terms, or ask for other equitable relief. These rights apply to both pension and welfare plans.
There is a serious limit on what a court can award. In an ERISA benefits case you typically cannot recover punitive damages or compensation for pain and suffering. Your remedy is usually the value of the benefits you were owed. That’s a narrower recovery than most state-law lawsuits, and it’s the tradeoff for having a federal enforcement framework.
Why You Usually Can’t Sue Under State Law
ERISA’s preemption clause overrides state laws that “relate to” an ERISA-covered plan.16Office of the Law Revision Counsel. 29 U.S. Code 1144 – Other Laws In practice, that means state consumer protection statutes, state-law contract and tort claims, and most state insurance rules don’t give you a separate path to challenge a benefits decision. You go through ERISA.
There is an exception. ERISA’s savings clause preserves state laws that regulate insurance, banking, or securities, so those laws can reach ERISA plans that buy insurance products. The deemer clause narrows that exception again: an employer that self-insures its health plan cannot be treated as an insurance company for state regulatory purposes. Self-insured employer health plans are largely outside state insurance mandates. Fully insured plans remain subject to them.
COBRA: Keeping Health Coverage After a Life Event
COBRA amended ERISA to let workers and their families keep group health coverage after events that would otherwise end it. It applies to group health plans of private employers with 20 or more employees in the prior year.17U.S. Department of Labor. FAQs on COBRA Continuation Health Coverage for Workers
Qualifying events include job loss for any reason other than gross misconduct, a reduction in work hours, the death of the covered employee, divorce or legal separation, the covered employee becoming entitled to Medicare, and a dependent child losing eligibility.
If you lose coverage because of your own job loss or reduced hours, you can continue coverage for up to 18 months. For other qualifying events, family members can continue coverage for up to 36 months. You pay the full premium yourself, both the employer and employee shares, plus a 2 percent administrative fee.
PBGC Insurance for Pensions
ERISA created the Pension Benefit Guaranty Corporation to insure defined benefit pension plans. If a covered plan terminates without enough money to pay promised benefits, the PBGC pays benefits up to a guaranteed maximum. For 2026, single-employer plans pay a flat-rate premium of $111 per participant plus a variable-rate premium of $52 per $1,000 of unfunded vested benefits.18Pension Benefit Guaranty Corporation. Premium Rates Multi-employer plans have a separate, lower guarantee tied to years of credited service.19Pension Benefit Guaranty Corporation. Introduction to Multiemployer Plans
One important boundary: defined contribution plans, including 401(k) accounts, are not covered by PBGC insurance. Those plans hold individual account balances rather than making fixed promises about future payments, so if the investments fall in value, PBGC insurance is not the backstop.