Finlitera lesson 21
401(k) Explained
Understand payroll contributions, employer matching, tax treatment, vesting, investment choices, and the rules that make a 401(k) different from an ordinary brokerage account.
A 401(k) is a workplace retirement account
Eligible employees can contribute part of their pay into a 401(k), often through automatic payroll deductions. The account has tax rules designed for retirement and typically offers a menu of investments chosen by the plan.
A 401(k) is the account. The funds inside it are the investments.
Traditional and Roth contributions are taxed differently
Traditional 401(k) contributions are generally made before federal income tax and qualified withdrawals are generally taxable later. Roth 401(k) contributions are made with after-tax dollars and qualified withdrawals can be tax-free under current rules.
The best choice depends on your situation and expectations; it is not simply “Roth is always better” or “traditional always saves more.”
Employer matching can be valuable compensation
Some employers contribute when you contribute. A plan might match a percentage of your pay up to a stated limit. The exact formula matters, so read the plan description instead of assuming every match works the same way.
Example
A simple match
If an employer matches 50% of employee contributions up to 6% of pay, contributing 6% could produce an employer contribution equal to 3% of pay. Real formulas vary.
2026 401(k) contribution limits
For 2026, an employee can generally contribute up to $24,500 to a 401(k).
- Age 50 or older: The general catch-up limit is $8,000, for a possible employee total of $32,500.
- Ages 60 through 63: A higher $11,250 catch-up limit may apply instead, for a possible employee total of $35,750.
Plan eligibility and rules still matter. These are employee contribution limits; employer contributions follow separate total-plan limits.
Vesting tells you when employer money is fully yours
Your own employee contributions are yours. Employer contributions may be subject to a vesting schedule, meaning you may need to remain employed for a period before keeping the full employer-funded amount after leaving.
The investment menu still matters
Plans may offer target-date funds, stock funds, bond funds, stable-value options, and other choices. Compare asset allocation, fees, diversification, and how the investment fits your time horizon.
Withdrawals before retirement can be costly
Taxes, penalties, plan rules, loans, and hardship withdrawals can make early access complicated. Retirement money should usually be treated as long-term money, while emergency savings stays separate.
Common mistakes to avoid
- Contributing without understanding the employer-match formula.
- Leaving contributions in an unsuitable default investment without reviewing it.
- Ignoring vesting rules.
- Using retirement funds as the first emergency account.
Your next action
Find your contribution rate, employer-match formula, vesting schedule, and current investment allocation.
Apply this lesson · 8–12 minutes
From understanding to a decision
After this practice, you should be able to:
- Calculate an employer match from a stated formula.
- Separate employee contributions from vested employer money.
Worked example
A fictional plan matches 50% of employee contributions up to 6% of eligible pay. At $60,000 pay, a 6% employee contribution is $3,600 and the match is $1,800. At 4%, the employee contributes $2,400 and receives $1,200. If the $1,800 employer balance is only 40% vested when the worker leaves, $720 of that employer balance is vested under this example. Employee contributions remain theirs. Actual timing, eligible-pay definitions and vesting come from plan documents.
Your turn
Answer both questions correctly to pass this practice. Retakes are welcome. The result is saved on this browser, separately from your reading progress.
Original Finlitera practice added September 9, 2026. Figures and people are hypothetical. This activity does not imply independent expert review.Quick knowledge check
- Is a 401(k) an account or an investment?
- What does vesting apply to?
- Why should you know the employer-match formula?
Show answers
1. An account. 2. It can determine how much employer-contributed money you keep after leaving. 3. So you know what contribution is required to receive available employer contributions.
Key terms
401(k) · Vesting · Employer match · Roth
Sources reviewed: August 27, 2026
Expert review status: Pending. This lesson has been source-checked but has not yet been independently reviewed by a credentialed tax or retirement professional. Finlitera will add the reviewer’s name, credentials, review date, and review scope only after that review occurs.
Reliable further reading
Finlitera provides general financial education. Contribution limits and plan rules can change; verify current details with your plan and the IRS.
Interactive practice
Practice this lesson
Estimate a common employer match structure using salary, contribution rate, match rate, and plan cap.
Use these tools for education and practice. They do not provide personalized financial advice.
Journal deep dive
What Is a 401(k) Employer Match?
See common match formulas, vesting considerations, 2026 contribution limits, and worked examples.
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Helpful resources: Financial Glossary · Free Money Starter Pack