401k: How It Works, Contribution Limits & Employer Match in 2026

A 401k is a retirement savings plan your employer offers that lets you contribute a portion of your paycheck before taxes are taken out (traditional 401k) or after taxes (Roth 401k). The money grows tax-deferred or tax-free until you withdraw it in retirement.

Your employer may match part of your contribution—free money that instantly boosts your retirement savings. The IRS sets annual contribution limits and penalizes early withdrawals before age 59½, making the 401k a long-term investment vehicle designed to replace Social Security and personal savings in retirement.

Employer match and profit-sharing contributions sit on top of these limits. The combined employee + employer cap is $70,000 in 2026 ($77,500 with catch-up for most ages, $81,250 for ages 60–63).

Contributions come out of each paycheck automatically, so a $23,500 annual limit means roughly $1,958 per month if you're paid monthly or $903 per biweekly paycheck.

• 50 % match on the first 6 %: if you earn $60,000 and contribute 6 % ($3,600), your employer adds 3 % ($1,800).
• Dollar-for-dollar on the first 3 %: contribute 3 %, get 3 % from your employer.
• Tiered match: 100 % on the first 3 %, then 50 % on the next 2 %.

Match dollars often vest over time—you own 20 % after one year, 40 % after two, 100 % after five, for example. Leave before you're fully vested and you forfeit unvested match dollars.

Always contribute at least enough to capture the full match. Anything less is turning down an immediate 50–100 % return on that portion of your salary.

Traditional 401k: contributions reduce your taxable income today; you pay income tax on withdrawals in retirement. If you earn $60,000 and contribute $10,000, your W-2 shows $50,000 of taxable income.

Roth 401k: contributions are after-tax (no upfront deduction), but qualified withdrawals in retirement are completely tax-free—both contributions and earnings. Your $10,000 contribution still costs you $10,000 in take-home pay, but decades of compounding growth come out tax-free after age 59½.

You cannot open a 401k on your own—your employer must sponsor the plan.

1. Check eligibility. Most plans require 30–90 days of employment or a minimum number of hours.

3. Choose your contribution percentage. Decide what percentage of each paycheck to contribute (often 1–50 %).

4. Pick traditional, Roth or a split. Indicate pre-tax (traditional) or after-tax (Roth) on the enrollment form.

6. Set it and forget it—then review annually. Contributions happen automatically.

Many employers also offer a [/free-tools](/free-tools) suite or third-party calculators to model different contribution rates and project retirement balances.

• Target-date funds: "set and forget" portfolios that shift from stocks to bonds as the target year approaches.
• Index funds: passively track a benchmark (S&P 500, total stock market, total bond market).
• Actively managed funds: a portfolio manager picks stocks; higher fees (0.50–1.50 %) and often underperform index funds over 10+ years.
• Stable value or money-market funds: ultra-safe, low return; useful for money you'll need in under five years.

Every fund charges an expense ratio—an annual percentage of assets. A 1 % expense ratio on a $100,000 balance costs you $1,000 per year.

Some plans also charge administrative fees (record-keeping, trustee fees), often $20–100 per year or 0.10–0.50 % of assets. Review your quarterly statement's fee disclosure.

Before age 59½: withdrawals trigger ordinary income tax plus a 10 % early-withdrawal penalty. Withdraw $10,000 and you'll owe income tax on $10,000, plus a $1,000 penalty.

Exceptions to the 10 % penalty (you still owe income tax):

• Separation from your employer at age 55 or older (Rule of 55).
• Total and permanent disability.
• Substantially equal periodic payments (SEPP/72(t) distributions).
• Qualified domestic relations order (divorce).
• IRS levy.

Required minimum distributions (RMDs) start at age 73 (as of 2026). The IRS forces you to withdraw a percentage each year, calculated by dividing your balance by your life expectancy.

Avoid early withdrawals whenever possible. If you need emergency cash, explore a 401k loan first—you borrow from your own balance and repay yourself with interest, no taxes or penalties if repaid on time.

Target: 15 % of gross income, including the match. If you earn $50,000 and your employer matches 3 %, you contribute 12 % ($6,000) and they add 3 % ($1,500) = 15 % total.

Maximum: $23,500 in 2026 if under 50, $31,000 if 50+, or $34,750 if age 60–63.

Run a 401k calculator to see how different contribution rates affect your retirement balance. A 25-year-old earning $50,000 who contributes 10 % ($5,000/year) with a 3 % match and 7 % average annual return will have roughly $1.1 million at age 65.

For a broader look at managing money and building wealth, visit our [/money-and-debt](/money-and-debt) hub.

Cashing out when you change jobs. Rolling a $20,000 balance into an IRA preserves tax-deferred growth. Cashing out triggers taxes, a 10 % penalty and sacrifices 30 years of compounding—potentially half a million dollars.

Ignoring fees. A 1.5 % expense ratio versus a 0.15 % index fund can cost you $300,000+ over a career. Review your fund lineup annually and switch to low-cost index funds when available.

Taking a 401k loan without a repayment plan. Loans must be repaid within five years (or when you leave your job). Default turns the loan into a taxable distribution plus 10 % penalty.

Picking too many funds. Owning 15 funds doesn't diversify you better than a single total-market index fund. Overlap and high fees often hurt more than they help.

What is a 401k and how does it work?

A 401k is an employer-sponsored retirement account that lets you invest pre-tax or after-tax salary dollars. Contributions are automatically deducted from your paycheck, and the money grows tax-deferred (traditional) or tax-free (Roth) until you withdraw it in retirement, typically after age 59½.

How much can I contribute to my 401k in 2026?

You can contribute up to $23,500 if you're under 50. If you're 50–59 or 64+, the catch-up limit is $7,500 for a total of $31,000.

What happens to my 401k if I leave my job?

Is a Roth 401k better than a traditional 401k?

It depends on your current tax bracket versus your expected retirement bracket. Roth contributions are taxed now but withdrawals are tax-free; traditional contributions lower your taxable income today but are taxed in retirement.

Can I withdraw money from my 401k before retirement?

Yes, but withdrawals before age 59½ typically incur a 10 % penalty plus ordinary income tax. Exceptions include separation from your employer at 55+, disability and certain hardships.

Next steps: Log into your employer's benefits portal, confirm you're contributing at least enough to capture the full match, and review your fund choices for low expense ratios. If you need personalized guidance, use our [/find-a-pro](/find-a-pro) directory to locate a fee-only financial planner, or explore calculators and worksheets on [/free-tools](/free-tools) to model different scenarios.