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Your employer is offering you free money through the 401(k) match. If you’re not contributing enough to get the full match, you’re leaving thousands of dollars on the table every year.
Here is the best deal in personal finance: your employer will give you free money if you put money into your 401(k). Not a loan. Not a perk you have to earn. Free cash deposited into your retirement account, just for participating.
This is called the employer match, and according to the Bureau of Labor Statistics, about 86% of 401(k) plans offer one. The most common match formula is 50% of your contributions up to 6% of your salary. In plain English: if you earn $60,000 and contribute 6% ($3,600/year), your employer adds another $1,800. That is an instant 50% return on your money before it even touches the stock market.
Yet a 2025 Vanguard study found that roughly 25% of employees with access to a match do not contribute enough to get the full amount. On a $60,000 salary with a 50%-of-6% match, that is $1,800/year left unclaimed. Over a 30-year career with 7% growth, that unclaimed match alone would have grown to roughly $170,000.
Do not be one of those people. Here is everything you need to know.
What is a 401(k)?
A 401(k) is a retirement savings account offered by your employer. The name comes from Section 401(k) of the US tax code (not the most inspiring origin story, but here we are). It works like this:
- You choose a percentage of your paycheck to contribute (say 6%).
- That money is deducted from your paycheck before you receive it.
- The money goes into your 401(k) account, where you invest it in funds offered by your plan.
- Your employer may add extra money on top (the match).
- The account grows tax-advantaged until you withdraw in retirement.
The key advantage over a regular brokerage account: tax benefits. There are two flavors:
Traditional 401(k): Your contributions are pre-tax. If you earn $60,000 and contribute $6,000, your taxable income drops to $54,000. You pay less income tax today. The trade-off: you pay income tax on every dollar you withdraw in retirement.
Roth 401(k): Your contributions are after-tax (no tax break today), but all withdrawals in retirement are tax-free, including the growth. Same concept as a Roth IRA, but through your employer with higher contribution limits.
Many employers now offer both options. We will cover which to choose later in this article.
How the employer match works
The match is your employer’s contribution to your 401(k) on top of your own. It is calculated as a percentage of your salary, tied to how much you contribute. Common match formulas:
Dollar-for-dollar up to X%. Your employer matches 100% of your contribution up to a certain percentage. Example: 100% match up to 3% means if you contribute 3% of your salary, they add 3%. If you contribute 5%, they still only add 3%.
50 cents on the dollar up to X%. Your employer matches 50% of your contribution up to a certain percentage. Example: 50% match up to 6% means if you contribute 6%, they add 3% (half of 6%). If you contribute 4%, they add 2% (half of 4%).
Tiered match. Some plans match different rates at different levels. Example: 100% of the first 3% you contribute, plus 50% of the next 2%. If you contribute 5%, they add 3% + 1% = 4%.
The minimum contribution to get the full match is the most important number in your financial life right now. Log into your 401(k) plan (or ask HR) and find out what your match formula is. Then set your contribution percentage to at least that level.
Here is the math on different salaries:
| Salary | Match formula | You contribute | Employer adds | Free money/year |
|---|---|---|---|---|
| $45,000 | 50% of 6% | 6% ($2,700) | 3% ($1,350) | $1,350 |
| $60,000 | 50% of 6% | 6% ($3,600) | 3% ($1,800) | $1,800 |
| $75,000 | 100% of 4% | 4% ($3,000) | 4% ($3,000) | $3,000 |
| $90,000 | 100% of 3% + 50% of next 2% | 5% ($4,500) | 4% ($3,600) | $3,600 |
See how much your 401(k) can grow
Enter your salary, contribution percentage, employer match percentage, current balance, expected years until retirement, and expected rate of return:
401(k) Retirement Calculator
Try this: set your salary to $60,000, your contribution to 6%, match to 3%, current balance to $0, years to 30, and rate to 7%. The result shows what happens when you let time, compounding, and free employer money work together. Now change the contribution from 6% to 3% (below the match threshold) and see how much you lose.
What about vesting?
Here is the catch most people do not know about: your employer’s match contributions may not be fully yours immediately. Many companies use a vesting schedule, which means you gradually earn ownership of the match over time.
Common vesting schedules:
Immediate vesting: The match is 100% yours from day one. Best case scenario.
Cliff vesting: You own 0% of the match until a specific date (usually 3 years), then 100%. If you leave at 2 years and 11 months, you lose the entire match.
Graded vesting: You earn ownership gradually. Typical schedule: 20% after year 1, 40% after year 2, 60% after year 3, 80% after year 4, 100% after year 5.
Your own contributions are always 100% vested immediately. You never lose the money you put in. Vesting only applies to the employer match.
This matters for job decisions. If you are considering switching jobs and you have $10,000 in unvested match sitting in your 401(k), factor that into your decision. Sometimes waiting 3 extra months to vest is worth thousands of dollars.
Check your plan documents or ask HR about your vesting schedule. Know exactly when that match money becomes fully yours.
What to invest in inside your 401(k)
Your 401(k) does not pick investments for you (unless you are in a target-date fund by default). You need to choose from the menu your plan offers. Most plans include some combination of:
Target-date funds (recommended for beginners). Named by retirement year: “Target 2055,” “Target 2060,” etc. Pick the one closest to the year you plan to retire. The fund automatically holds a mix of stocks and bonds and gradually shifts toward bonds as you age. One fund, zero maintenance. This is the simplest, best option for most people.
Index funds. If your plan offers an S&P 500 index fund or total stock market index fund with an expense ratio under 0.10%, this is an excellent choice. You will need to manage your own stock/bond allocation (see our index fund guide for how to build a simple portfolio).
Actively managed funds. Funds where a manager picks stocks trying to beat the market. These charge higher fees (often 0.50% to 1.50%) and rarely outperform index funds over the long run. Avoid these unless your plan has no index options.
Company stock. Some plans let you buy your employer’s stock. Keep this under 10% of your 401(k). You already depend on your employer for your paycheck. If the company struggles, you do not want your retirement savings to drop at the same time you might lose your job. Diversification protects you.
The decision for most beginners: pick the target-date fund closest to your retirement year and put 100% of contributions there. Revisit in a few years when you have learned more.
Traditional 401(k) or Roth 401(k)?
If your employer offers both, here is how to choose:
Choose Roth 401(k) if:
- You are in the 12% or 22% tax bracket now (most people under 30 earning under $95,000 single)
- You expect your income and tax rate to increase over your career
- You already have a Roth IRA and want to maximize tax-free retirement money
- You want tax diversification (some pre-tax, some Roth money in retirement)
Choose Traditional 401(k) if:
- You are in the 32%+ bracket and want the tax deduction now
- You expect to be in a lower tax bracket in retirement
- You need to reduce your current taxable income (for example, to qualify for other tax benefits)
Not sure? Split it. Many plans allow you to contribute a percentage to Traditional and a percentage to Roth. A 50/50 split gives you tax diversification without having to predict the future.
Important note: regardless of whether you choose Traditional or Roth for your contributions, the employer match always goes into the Traditional (pre-tax) bucket. This is an IRS rule, not your employer’s choice.
2026 contribution limits
Under age 50: $23,500 per year (your contributions only; employer match does not count toward this limit)
Age 50 and over: $31,000 per year (includes $7,500 catch-up contribution)
Total combined limit (your contributions + employer match + any after-tax contributions): $70,000
Most people in their 20s will not hit the $23,500 limit, and that is fine. Contributing 10 to 15% of your salary is excellent. The priority order from our investing guide still applies: 401(k) up to match, then Roth IRA ($7,000), then back to 401(k) for more.
What happens when you leave your job?
You have four options:
Leave it in the old plan. Your money stays invested and growing. Simple, but you will have retirement accounts scattered across multiple former employers over a career. Hard to manage.
Roll it into your new employer’s 401(k). Transfer the money into your new job’s plan. Keeps everything consolidated. Only works if the new plan accepts rollovers (most do).
Roll it into a Traditional IRA or Roth IRA. Transfer to your own IRA at any brokerage. This gives you the widest investment options and often lower fees. Rolling Traditional 401(k) into a Traditional IRA is tax-free. Rolling Traditional 401(k) into a Roth IRA triggers a tax bill (you pay income tax on the converted amount).
Cash it out. Take the money as cash. You will owe income tax plus a 10% early withdrawal penalty if you are under 59.5. On a $30,000 balance, that could mean losing $10,000+ to taxes and penalties. Do not do this unless you have no other option.
Best move for most people: roll into an IRA at your preferred brokerage. You get better investment options, lower fees, and full control.
Open an IRA for your 401(k) rolloverCommon 401(k) mistakes
Not contributing enough for the full match. This is literally turning down free money. Even if money is tight, adjust your budget to hit the match threshold. The 50/30/20 budget can help you find room.
Leaving money in the default money market fund. Some plans default to a money market or stable value fund earning 2 to 3%. Your contributions sit there earning almost nothing unless you actively choose investments. Log in and check. If your money is in a “money market” or “stable value” fund, move it to a target-date fund or index fund.
Cashing out when you switch jobs. The taxes and penalties eat 30 to 40% of your balance, and you lose decades of compound growth. Always roll over. Never cash out.
Taking a 401(k) loan. You can borrow from your own 401(k), and the interest goes back to yourself, so it seems harmless. But the borrowed money is not invested (losing growth), and if you leave your job, the loan is typically due within 60 to 90 days or it becomes a taxable distribution with penalties. Use this only as a true last resort.
Not increasing contributions when you get a raise. If you get a 5% raise, increase your 401(k) contribution by 1 to 2%. You will barely notice the difference in your paycheck, but the extra contributions compound dramatically over time. Many plans offer an “auto-escalation” feature that does this automatically. Turn it on.
Panicking during market crashes. Your 401(k) balance will drop during recessions. It dropped 34% during COVID in 2020. It dropped 50%+ during 2008. Both times, it fully recovered and then some. If you are decades from retirement, a crash is a buying opportunity. Do not log in, do not change your allocation, do not stop contributing. Keep going.
Frequently asked questions
How much should I contribute to my 401(k)? At minimum, enough to get the full employer match (often 3 to 6%). Ideally, 10 to 15% of your salary across all retirement accounts (401(k) + IRA). If you are behind on retirement savings, aim for 15 to 20%.
Can I contribute to a 401(k) and a Roth IRA? Yes. They have separate contribution limits. You can max out both: $23,500 in the 401(k) and $7,000 in the Roth IRA for a total of $30,500 per year in tax-advantaged retirement savings.
What if my employer does not offer a 401(k)? Open a Roth IRA on your own (see our Roth IRA guide). If you are self-employed, look into a Solo 401(k) or SEP IRA, which offer even higher contribution limits.
When can I withdraw from my 401(k)? Penalty-free withdrawals start at age 59.5. Early withdrawals trigger a 10% penalty plus income tax. There are some exceptions: the Rule of 55 (if you leave your job at age 55+, you can withdraw from that employer’s 401(k) penalty-free), hardship withdrawals, and substantially equal periodic payments (SEPP/72t). But in general, treat this as money you will not touch until retirement.
My 401(k) only has expensive funds. Should I still contribute? Yes, up to the match. The free money from the match outweighs high fund fees. After the match, redirect additional savings to your Roth IRA where you can choose low-cost index funds. If all your plan’s funds charge over 1%, it is still worth contributing for the match, but bring up the fund options with your HR department. Many employers will improve their plan if employees ask.
Should I stop my 401(k) contributions to pay off debt? Never stop below the match threshold. You are earning an instant 50 to 100% return on matched contributions. No debt interest rate is that high. Contribute up to the match, then throw everything else at high-interest debt. After the debt is gone, increase your 401(k) contributions.
The bottom line
Your 401(k) employer match is the closest thing to free money in the financial world. At a minimum, contribute enough to capture every dollar of it. Then choose a target-date fund, turn on auto-escalation, and stop thinking about it.
The math is overwhelming in your favor: $1,800/year in employer match, invested at 7% for 30 years, grows to roughly $170,000. Add your own contributions and you are looking at a retirement fund well into six or seven figures. All from a few percentage points of your paycheck that you will barely miss after the first month.
Log into your 401(k) today. Check your contribution rate. Check your match formula. If the numbers do not line up, fix it right now. It takes 5 minutes and it is worth a fortune.
Open an IRA to complement your 401(k)