A 401(k) is an employer-sponsored retirement account that lets you invest pre-tax money (reducing your current tax bill) with tax-deferred growth. The 2026 contribution limit is $23,500 ($31,000 if 50+). If your employer offers a match, contribute at least enough to get the full match — it's an instant 50-100% return on your money.
Bottom line:
Key Takeaways
- 2026 contribution limit: $23,500 ($31,000 catch-up for 50+)
- Employer match is free money — always contribute enough to get the full match
- Traditional 401(k) contributions reduce your taxable income now
- Roth 401(k) option: contribute after-tax for tax-free withdrawals in retirement
- Early withdrawals before 59½ incur a 10% penalty plus income taxes
Traditional 401(k)
A 401(k) is a retirement savings plan offered by employers. You choose a percentage of each paycheck to contribute, and the money is invested in funds you select from the plan's options. Contributions happen automatically through payroll deduction before you ever see the money — making it effortless.
Traditional 401(k): Contributions are pre-tax, meaning they reduce your taxable income for the year. If you earn $80,000 and contribute $10,000, you're only taxed on $70,000. The money grows tax-deferred, and you pay income taxes when you withdraw in retirement.
Roth 401(k): Contributions are after-tax (no immediate tax break), but qualified withdrawals in retirement are completely tax-free. Available at most large employers alongside the Traditional option.
Many employers match a portion of your
Many employers match a portion of your contributions — commonly 50% of your contributions up to 6% of salary, or 100% up to 3-4%. If your employer matches 50% of contributions up to 6% and you earn $80,000, contributing 6% ($4,800) earns you a $2,400 match. That's an instant 50% return.
Not contributing enough to get the full match is leaving free money on the table. This is the single most important financial move for anyone with access to a matching 401(k).
Most 401(k) plans offer a menu of
Most 401(k) plans offer a menu of mutual funds including stock funds, bond funds, and target-date funds. For most people, a target-date fund matching your expected retirement year is the simplest and most effective choice — it automatically diversifies and becomes more conservative as you age.
If you prefer to choose your own allocation, look for low-cost index funds. Compare expense ratios — every 0.50% in fees costs you roughly 10% of your portfolio over 20 years.
Standard withdrawals begin at age 59½ with
Standard withdrawals begin at age 59½ with no penalty. Required minimum distributions (RMDs) start at age 73. Early withdrawals before 59½ generally incur a 10% penalty plus income taxes — effectively losing 30-40% of the withdrawal to taxes and penalties.
Some plans allow hardship withdrawals for specific emergencies and loans against your 401(k) balance. However, both should be considered last resorts, as they significantly impact your retirement savings growth.
How We Evaluated
Contribution limits and rules based on IRS guidelines for 2026. Match examples use common employer formulas from Bureau of Labor Statistics data.Frequently Asked Questions
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