Your job might be handing you free money right now – and you might not even know it.

That’s what an employer 401k match is. If your job offers one and you’re not contributing enough to get it, you’re leaving real dollars on the table every single paycheck. Let’s fix that.

What Is a 401k?

A 401k is a retirement savings account offered through your employer. You contribute a percentage of your paycheck before taxes are taken out – which means you pay less in income taxes today and your money grows tax-deferred until you withdraw it in retirement.

The basic idea:

• Money comes out of your paycheck automatically
• It goes into your 401k account before the government taxes it
• You invest that money (usually in mutual funds or index funds)
• It grows tax-free until you retire

The name “401k” comes from the section of the IRS tax code that created it. Not the most exciting origin story, but the account itself is powerful.

The Employer Match – Free Money

Many employers will match a percentage of what you contribute. A common structure looks like this: your employer matches 100% of your contributions up to 3% of your salary.

So if you make $40,000 a year and contribute 3% ($1,200), your employer adds another $1,200. That’s an instant 100% return on that portion of your investment before the market does anything.

No investment in the world guarantees that. Contribute at least enough to get the full match – always.

How Much Should You Contribute?

For 2026, the IRS allows you to contribute up to $23,500 per year to a 401k (if you’re under 50). If you’re 50 or older, you can add an extra $7,500 catch-up contribution on top of that. Most people can’t max that out right away – and that’s fine.

A good starting point:

1. Start at whatever gets you the full employer match – even if it’s just 3-5%
2. Increase by 1% each year – you’ll barely notice the difference in your paycheck
3. Work toward 15% total (including any employer match) over time

Even $50 a month invested in your 20s compounds into something significant by retirement. The math works in your favor the earlier you start.

What Do You Actually Invest In?

Your 401k plan will offer a menu of investment options – usually mutual funds or target-date funds. You pick where your contributions go.

Look for:

• Index funds with low expense ratios (under 0.20%)
• Target-date funds (like “Target 2055”) – these automatically adjust as you get closer to retirement

Avoid funds with expense ratios above 1%. Those fees eat into your returns over decades more than most people realize.

What About Taxes?

Traditional 401k contributions lower your taxable income now. You pay taxes when you withdraw the money in retirement.

Some employers also offer a Roth 401k option – you contribute after-tax, but withdrawals in retirement are tax-free.

Which is better? If you think you’ll be in a higher tax bracket in retirement, Roth. If you want the tax break now, traditional. Both are better than not contributing at all.

Early Withdrawal – Don’t Do It

If you pull money out of your 401k before age 59½, you’ll pay income taxes plus a 10% penalty. That combination wipes out a huge chunk of what you saved.

Your 401k is for retirement. Treat it that way.

The Main Thing

Open your 401k. Contribute enough to get the full employer match. Pick a low-cost index fund. And then don’t touch it.

That’s the whole strategy for most people starting out. You don’t need to be an expert – you just need to start.