What Is a 401(k)? A Plain-English Guide
A 401(k) is an employer-sponsored retirement plan that lets eligible workers save through payroll deductions, often with an employer match. Traditional contributions generally receive tax treatment before retirement; Roth contributions are taxed before contribution and can qualify for tax-free withdrawals.
How a 401(k) works
You choose a contribution percentage from each paycheck. The money goes into the plan and is invested according to the options your employer provides. Your balance can grow from contributions, employer contributions, and investment returns. Plan rules determine vesting, withdrawals, loans, and available investment options.
Traditional vs Roth 401(k)
Traditional contributions are generally made before federal income tax, while Roth 401(k) contributions are made after tax. A Roth 401(k) is not the same account as a Roth IRA: income limits and eligibility rules differ, and employer plans control which features are available.
The employer match
An employer match can add money when you contribute. The formula and vesting schedule are plan-specific. Start by reading your plan's matching formula, then use Gleefund's employer match calculator to explore the value of contributing enough to receive it.
Limits and rules
Contribution limits, catch-up limits, withdrawal rules, and required minimum distribution rules can change. Gleefund keeps policy values in a separate rules layer and links to IRS sources, but you should verify the current tax-year figures before making a contribution decision.
Frequently asked questions
Is a 401(k) the same as an IRA?
No. A 401(k) is an employer-sponsored plan. An IRA is an individual account opened through a financial institution. They have different limits, eligibility rules, investment menus, and employer-match possibilities.
How much should I contribute to a 401(k)?
A common first goal is contributing enough to receive the full employer match, if available. Your broader target depends on income, emergency savings, debt, goals, and retirement timeline.
Can I take money out of a 401(k)?
Sometimes. Withdrawals, loans, hardship distributions, and exceptions are controlled by tax rules and your plan document. An early taxable distribution can trigger ordinary income tax and an additional penalty.
Sources
Gleefund explains general retirement-account concepts and provides estimates. It does not provide financial, tax, or legal advice. See our disclaimer and methodology. Check the current IRS rules before acting.
Figures current as of 2026-09-25. Found an error? Contact us.