401(k) explained: are you leaving free money on the table?
Most people enrolled in a 401(k) couldn't tell you what they're invested in or whether they're on track. The decisions you make in your 20s and 30s can be worth hundreds of thousands by retirement — and the single biggest one takes about ten minutes to fix.
Return on an employer match
100%
Instant, and effectively guaranteed
$500/month for 30 years
$1M+
With a full match at 7% returns
Penalty-free withdrawals
59½
Required withdrawals begin at 73
This is part of a series on personal finance and investing — the foundation people build before they start buying assets like real estate. Retirement accounts come first for most people, and they're the thing most often left half-configured.
Nobody dreams about having a 401(k). They dream about what it makes possible: retiring without worrying about money, more time with family, waking up because you want to rather than because an alarm says you have to. The point isn't the account. It's how many options your future self gets.
What a 401(k) actually is
A retirement account you get through an employer. Money comes out of your paycheck before taxes, gets invested, and grows. You pay tax later, when you withdraw in retirement.
The mechanics are simple enough that most people stop learning there. That's where the money gets lost.
An employer match is part of your salary
If your employer matches up to 4% and you earn $60,000, that's $2,400 a year. Contribute $2,400 and they add $2,400.
Your money doubles the moment it lands. There is no other investment that returns 100% instantly and reliably.
A match isn't a bonus. It's compensation your employer has already budgeted for you. Not contributing enough to capture it is turning down part of your salary.
Where people lose the most
Not contributing enough to get the full match. If the match goes to 4% and you're contributing 2%, you're capturing half of what's available. Check your contribution percentage against your plan's match formula. That's a ten-minute task worth thousands a year.
Never checking where the money is invested. This is the quieter and more expensive one. Contributing is the hard part and most people get that far — then never look at what the money is actually in.
Plans typically hand you a list of options, and the list isn't always good. Target date funds can carry high fees. Some plans steer heavily toward company stock. And default settings sometimes leave contributions parked in a money market fund earning almost nothing.
People come to me saying they've contributed for 10 or 20 years and it hasn't grown. They look at the fund and find it was sitting in cash the whole time.
What you generally want is low-cost and broadly diversified — something tracking the S&P 500 or a total market index. Predictable and cheap beats clever, especially over thirty years, and fees compound against you exactly the way returns compound for you.
Log in. Find out what you own. It's the highest-return hour you'll spend this year.
What $500 a month becomes
Thirty years of contributions at roughly 7% annual returns:
| No match | With full match | |
|---|---|---|
| Monthly contribution | $500 | $1,000 |
| Per year | $6,000 | $12,000 |
| Total contributed over 30 years | $180,000 | $360,000 |
| Approximate value at 30 years | $550,000–$600,000 | Over $1,000,000 |
Your own $180,000 more than triples. Add the match and the same monthly habit crosses seven figures.
None of that requires picking winners or timing anything. It's time in the market and compounding doing the work. The 7% figure is an illustration based on long-run averages, not a promise — returns vary year to year and your plan's fees come out of them.
401(k) versus traditional IRA
The tax treatment is nearly identical: pre-tax money in, growth untaxed, ordinary income tax on withdrawal. The differences are about where the account comes from and how much control you have.
| 401(k) | Traditional IRA | |
|---|---|---|
| Where it comes from | Your employer | You open it yourself |
| Employer match | Often yes | No |
| Investment options | Limited to the plan menu | Full control |
| Contribution limit | Higher | Lower — around $7,500 |
| Vesting | May require time on the job | Not applicable |
Watch the vesting schedule. Some employers require you to stay a set period before their match is fully yours. If you're weighing a job change, it's worth knowing what walking away costs.
Contribution limits are adjusted annually, so confirm the current year's figures rather than relying on a number you read once.
If you're self-employed
There's a version of this that's genuinely powerful. If you're set up as a corporation and you're an employee of the company you own, the company can match your own 401(k) contributions. That raises business expenses, which reduces the company's tax liability, while the money lands in your personal retirement savings.
I use a SEP IRA for the same reason. The variations here get detailed enough to deserve their own conversation — and their own conversation with your CPA, since the right structure depends on your entity type and income.
The withdrawal rules that matter
59½ is when you can withdraw without penalty. Before that, expect a 10% penalty on top of the income tax. There are exceptions — one of the more useful is that leaving your job in or after the year you turn 55 can let you access that employer's plan early.
73 is when withdrawals become mandatory, whether you need the money or not.
Everything you withdraw is ordinary income. This is the part that surprises people. Take $5,000 a month in retirement and you're taxed as though you earn $60,000 a year. Take a large lump sum for a car or a house and it can push you into a higher bracket for that year.
The tax was deferred, not avoided. Planning how you draw the money down matters nearly as much as how you built it.
Social Security and other income stack on top of this, which is where a conversation with a financial advisor or CPA earns its keep well before you retire.
Why this comes before real estate
A 401(k) is the simplest place most people can start investing. It's automatic, it's pre-tax, and you never see the money, which removes the discipline problem entirely.
But it only works if you actually use it — contributing enough to capture the full match, and paying attention to where the money sits.
It's also one vehicle among several. The goal is a portfolio with multiple types of assets working at once, and real estate is one of them. Getting the retirement account configured properly first means the foundation is solid before you start adding to it.
401(k) FAQ
What is a 401(k) employer match and why does it matter so much?
It's money your employer contributes alongside yours, commonly up to a set percentage of your salary. On a $60,000 salary with a 4% match, contributing $2,400 gets you another $2,400 — an instant 100% return before the money earns anything. It's part of your total compensation, so not contributing enough to capture it means declining part of your pay.
How much will $500 a month in a 401(k) be worth?
Over 30 years at roughly 7% annual returns, $500 monthly grows from $180,000 contributed to somewhere around $550,000 to $600,000. With a full employer match doubling the contribution to $1,000 a month, the same 30 years produces over $1 million. Returns vary and fees reduce them, so treat these as illustrations rather than projections.
Why hasn't my 401(k) grown?
Most often because of what it's invested in rather than how much went in. Default settings sometimes leave contributions in a money market fund earning almost nothing, and some plan menus are dominated by high-fee target date funds or company stock. Log into your account and check which funds you actually hold — people who have contributed for a decade with little growth usually find the money was sitting in cash.
What's the difference between a 401(k) and a traditional IRA?
The tax treatment is nearly the same: pre-tax contributions, tax-deferred growth, ordinary income tax on withdrawal. A 401(k) comes through your employer, has higher contribution limits, often includes a match, but limits you to the plan's investment menu and may have a vesting schedule. A traditional IRA you open yourself with full control over investments, but there's no match and the contribution limit is lower, around $7,500. Limits change annually.
When can I withdraw from my 401(k) without a penalty?
At 59½. Withdrawals before then generally carry a 10% penalty on top of income tax, though exceptions exist — including leaving your employer in or after the year you turn 55. Required minimum distributions begin at 73. All withdrawals are taxed as ordinary income, so taking $5,000 a month means being taxed as though you earn $60,000 a year.
Talk through your investing goals
A 401(k) is one vehicle among several, and the right mix depends on your income, your timeline and what you're building toward. If you want to sit down and talk through how real estate fits alongside your retirement accounts, reach out.
This is general information, not individualized financial or tax advice. Contribution limits and rules change, so confirm specifics with your plan administrator, financial advisor or CPA.