401(k) Plan
An employer-sponsored defined contribution retirement plan that allows employees to save and invest a portion of their paycheck before taxes.
401(k) Plan is a term from U.S. pension regulation and actuarial practice — typically a line item on IRS Form 5500, a concept in actuarial valuations, or a federal pension-insurance term from PBGC rules. The definition here is the practical participant-facing meaning, anchored in how the term actually appears in the data this site uses. Understanding 401(k) Plan is part of reading pension data defensibly. The underlying technical definition matters less than the participant-relevant interpretation: does this concept signal funded-status pressure, benefit-modification risk, or routine actuarial bookkeeping?
Each plan page on PensionWatch surfaces the 401(k) Plan-relevant numbers for that specific plan, so the general definition here translates into concrete data on the per-plan pages you actually use.
In Detail
The 401(k) plan, named after the section of the Internal Revenue Code that authorizes it, has become the dominant private-sector retirement vehicle since its introduction in 1978. Employees can contribute pre-tax dollars up to annual IRS limits ($23,000 in 2024, plus a $7,500 catch-up for those 50 and older). Many employers match a portion of employee contributions, typically 50 cents to a dollar for each dollar contributed up to 3-6% of salary. Unlike defined benefit pensions, 401(k) plans place investment decisions and market risk squarely on the employee.
Plan participants choose from a menu of mutual funds, target-date funds, and sometimes company stock. The shift from pensions to 401(k) plans has been one of the most significant changes in American retirement over the past four decades. While 401(k) plans offer greater portability and employee control, research consistently shows that many workers fail to save enough, invest too conservatively or aggressively, and pay excessive fees. The retirement income generated by a typical 401(k) is substantially lower than what a traditional pension provides for comparable careers.
Frequently Asked Questions
What does 401(k) Plan mean in pension finance?
An employer-sponsored defined contribution retirement plan that allows employees to save and invest a portion of their paycheck before taxes.
Why does 401(k) Plan matter for my retirement?
The 401(k) plan, named after the section of the Internal Revenue Code that authorizes it, has become the dominant private-sector retirement vehicle since its introduction in 1978. Employees can contribute pre-tax dollars up to annual IRS limits ($23,000 in 2024, plus a $7,500 catch-up for those 50 a...