401(k) Plan Report is a research resource that helps employees evaluate retirement benefits when comparing employers or job offers. It provides profiles for more than 69,000 employers, linking plan information to public filings and dated plan documents. Users can search for a company, compare two employers, explore industry benchmarks, and review a plan’s reported assets, participation, employer contributions, administrative expenses, service providers, and filing history.

The service also helps employees investigate benefit details that may not be clear from headline descriptions, including employer match formulas, eligibility requirements, vesting schedules, investment rules, and fees. Its guides explain how to assess what an employer contributes, what costs may apply, when employer money becomes vested, and what public records can reveal about plan activity and management. Industry comparisons and lists of reported costs and contributions offer additional context, while the site cautions that historical filings are not guarantees of future benefits. Current-term plan rules are included only when supported by dated filings or employer publications.