401(k)
A 401(k) is a retirement savings plan commonly offered by employers in the United States that allows workers to contribute a portion of their salary on a tax-deferred basis. This means that contributions are deducted from paychecks before taxes are applied, thereby lowering the employee's taxable income and allowing their savings to grow without immediate tax implications. Many employers also contribute to these plans, often matching employee contributions, which can further enhance retirement savings.
Introduced in 1978, 401(k) plans have evolved and now include variants such as SIMPLE and solo 401(k) plans, catering to different employment situations. Employees can typically begin withdrawing funds at age 59½, although early withdrawals may incur penalties. The Internal Revenue Service (IRS) regulates contribution limits, which for 2024 are set at $23,000 for traditional plans and $16,000 for SIMPLE plans.
The 401(k) plan serves as a vital tool for many Americans in building a secure financial future, especially in light of declining pension plans and concerns about Social Security. As such, understanding the rules and options associated with 401(k) plans is crucial for effective retirement planning.
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401(k)
A 401(k) is one of several types of retirement plans available to workers in the United States. Typically offered by a company to its employees, a 401(k) plan enables enrolled employees to contribute funds to their retirement accounts on a tax-advantaged basis, meaning that their contributions are deducted from their paychecks before the pay is taxed. This ultimately allows the employees to save more for retirement and also reduces their overall federal taxable income. Some employers also make contributions to 401(k) plans on behalf of their employees, often in the form of a full or partial contribution match. Funds deposited in a 401(k) plan by both the employee and the employer are invested in securities and allowed to grow tax-free until the employee reaches retirement age and is eligible to receive distributions to the account and pay taxes on them. In addition to the traditional employer-sponsored 401(k) plan, the US tax code also provides for several other variants, including the SIMPLE (Savings Incentive Match Plan for Employees) 401(k) plan and the solo 401(k) plan.
Background
Saving for retirement is an issue of great concern among many workers in the United States. Although the Social Security program offers a financial safety net for many retirees in the early twenty-first century, its future has been called into question due to federal budgetary issues and a push from some lawmakers to privatize the program. At the same time, a dramatic decrease in the prevalence of pensions, in which companies guarantee regular payments for their retired employees, and the lengthening average lifespan of the United States population have prompted many Americans to place greater emphasis on their long-term savings and investments in order to maximize the amount of income they will have in retirement. While some retirement plans, such as individual retirement accounts (IRAs), are often contributed to on an independent basis, others are sponsored by employers and effectively available only to workers whose employers offer such plans.
One of the most popular employer-sponsored retirement plans is the 401(k) plan. The culmination of decades of development, the 401(k) was first introduced in 1978, when the Revenue Act of 1978 added section 401(k) to the Internal Revenue Code. This new section of the code stipulated that employees who chose to defer a portion of their income, allocating it to an employer-sponsored retirement account, would be exempt from paying federal income taxes on that deferred income. Over the following years, various major corporations throughout the United States began to offer 401(k) plans to their employees. The regulations governing 401(k) plans were amended several times over the next decades, and new types of 401(k) plans were introduced, including the SIMPLE 401(k) plan, which was introduced in 1996 with the passage of the Small Business Job Protection Act of that year. The Economic Growth and Tax Relief Reconciliation Act of 2001 brought numerous changes to the 401(k), introducing the concept of catch-up contributions and creating new regulations regarding vesting periods.
Several types of 401(k) plans are available, each with different advantages for individuals in varying situations. The traditional 401(k) plan allows employees to make pretax contributions to their retirement savings and also allows but does not require employers to make additional contributions, which may be subject to a vesting schedule. The safe harbor 401(k) plan requires employers to contribute to their employees’ 401(k) plans and stipulates that the employees must be immediately vested in those employer contributions. SIMPLE (Savings Incentive Match Plan for Employees) 401(k) plans are designed for small businesses that employ one hundred or fewer people and are similar to safe harbor plans in their vesting requirements. While most 401(k) plans are sponsored by employers, self-employed individuals may be eligible to enroll in an individual or solo 401(k) plan. Such plans are similar to traditional 401(k) plans but allow the participant to fill the roles of both employer and employee and, thus, make contributions in both roles.
Overview
Saving for retirement is a critical task for many Americans, and 401(k) plans are just one of many tools that enable individuals to reach their retirement savings goals. Since 401(k) plans are heavily regulated and have a variety of limitations, they may not be appropriate for all financial situations. Nevertheless, they are an essential part of the retirement savings and investing process for many Americans.
The process of contributing to an employer-sponsored 401(k) plan is relatively simple. Employees determine how much of their pretax income they would like to contribute to the plan on a regular basis and inform their employers through the proper channels. This amount is usually expressed in percentage form; for example, an employee may choose to contribute 10 percent of their monthly pay. Because 401(k) contributions are made on a tax-free basis, no federal income taxes are levied on the contributed funds; instead, an individual enrolled in a 401(k) plan will pay income taxes on those funds only when withdrawing them during retirement. Making tax-free retirement contributions has the effect of lowering the employee’s total annual taxable income, which, in turn, frequently reduces the amount of taxes they must pay or increases the sum they receive as a federal tax refund.
After funds are deposited in a 401(k) plan, they are typically invested in securities such as mutual funds and allowed to grow until the account holder is ready to retire. Individuals may generally make withdrawals from their 401(k) plans upon reaching fifty-nine and one-half years of age. Plan participants may also be eligible to withdraw funds if they experience certain financial hardships. Those who make other early withdrawals may be required to pay a tax penalty on the withdrawn funds. In addition, 401(k) participants are required to begin receiving distributions by the year following that in which they either retire or reach seventy and one-half years of age, whichever comes later.
Like many retirement plans, 401(k) plans are heavily regulated by the US Internal Revenue Service (IRS). While 401(k) plans enable participating individuals to contribute a substantial percentage of their pretax income to their retirement accounts, the IRS has implemented a number of regulations concerning how much money may be deposited. An employee’s elective tax-free contributions for a year may not exceed the limits set by the IRS; for the 2024 tax year, the limit was set at $23,000 for traditional and safe harbor plans. SIMPLE 401(k) plans had a contribution limit of $16,000 for 2024. Specific 401(k) plans offered by companies may also have their own restrictions; for example, some set contribution limits lower than the IRS’s maximum. As allowed by IRS regulations, some plans permit account holders over age fifty to make catch-up contributions—additional elective deferrals that enable employees with aggressive retirement savings goals or who did not begin contributing to retirement savings until later in life to boost their savings.
One significant benefit of 401(k) plans is that in addition to allowing employees to save a portion of their pretax income, they enable employers to make contributions to their employees’ accounts as well. These contributions are often made by matching or partially matching the contributions made by the employee. In such cases, experts typically advise employees to contribute up to the maximum match, so as to claim the maximum possible employer contribution. Unlike employee contributions, employer contributions are frequently subject to a vesting schedule, which stipulates that the employee will not have full access to the employer-contributed funds until they have been enrolled in the plan or worked for the company for a certain period of time.
A variety of restrictions apply to employer contributions. Traditional 401(k) plans allow employer contributions to be subject to vesting schedules; however, the IRS stipulates that employees must be fully vested in employer contributions made in SIMPLE or safe harbor plans as soon as the contributions are made. The total contributions made by both the employee and the employer are also limited. In 2024, the IRS stipulates that the total contributions may not exceed $69,000 or the employee’s total pretax income, whichever is lower.
Bibliography
Allen, Everett T. Retirement Plans: 401(k)s, IRAs, and Other Deferred Compensation Approaches. 12th ed., McGraw-Hill, 2017.
Cussen, Mark P. "The Rules of a 401(k) Retirement Plan." Investopedia, 9 Nov. 2024, www.investopedia.com/articles/retirement/08/401k-info.asp. Accessed 25 Nov. 2024.
"Employer-Sponsored Plans." Investor.gov, US Securities and Exchange Commission, www.investor.gov/additional-resources/retirement-toolkit/employer-sponsored-plans. Accessed 25 Nov. 2024.
Friedberg, Barbara, editor. Personal Finance: An Encyclopedia of Modern Money Management. ABC-CLIO, 2015.
Holden, Sarah, et al. "401(k) Plan Asset Allocation, Account Balances, and Loan Activity in 2022." Employee Benefit Research Institute, 30 Apr. 2024, www.ebri.org/docs/default-source/pbriefs/ebri‗ib‗606‗k-xsec-30apr24.pdf?sfvrsn=1f43072f‗1. Accessed 25 Nov. 2024.
Milevsky, Moshe A. The Seven Most Important Equations for Your Retirement. Wiley, 2012.
"One-Participant 401(k) Plans." Internal Revenue Service, 20 Aug. 2024, www.irs.gov/retirement-plans/one-participant-401k-plans. Accessed 25 Nov. 2024.
"Taking the Mystery out of Retirement Planning." United States Department of Labor, www.dol.gov/sites/dolgov/files/EBSA/about-ebsa/our-activities/resource-center/publications/retirement-planning-tips.pdf. Accessed 25 Nov. 2024.
"Types of Retirement Plans." Internal Revenue Service, 19 Aug. 2024, www.irs.gov/retirement-plans/plan-sponsor/types-of-retirement-plans. Accessed 25 Nov. 2024.
"What You Should Know about Your Retirement Plan." United States Department of Labor, www.dol.gov/agencies/ebsa/about-ebsa/our-activities/resource-center/publications/what-you-should-know-about-your-retirement-plan. Accessed 25 Nov. 2024.