Imagine your boss walks over and says, “I’d like to give you an extra $2,000 this year.” Would you say no?
Of course not. But plenty of workers effectively do, every paycheck, by not contributing enough to their 401(k) to get the full employer match.
That’s Sister vs Sister, Episode #3. Both sisters work at the same company, earn the same salary, and are offered the same match. One skips it. The other contributes just enough to collect every dollar. In this post we’ll break down how a 401(k) match works, run the numbers over one year and over a career, and show you how to make sure you’re not leaving free money on the table.
The Setup: Big Sis vs Little Sis
- Both sisters earn $50,000 a year.
- Their employer offers an example match of 100% of what you contribute, up to 4% of salary.
- Little Sis skips the 401(k) entirely. Retirement feels far away, and she’d rather have the money in her paycheck.
- Big Sis contributes 4% of her salary, exactly enough to get the full match, every paycheck.
Important: This is an illustrative example. Every employer’s plan is different. Some match dollar-for-dollar, some match 50 cents on the dollar, some don’t match at all. Check your own plan documents or ask HR for the exact formula.
The Math: What the Match Is Worth
The match calculation is simple: 4% of $50,000 = $2,000 from Big Sis, and her employer adds another $2,000.
| Little Sis (skips the match) | Big Sis (gets the full match) | |
|---|---|---|
| Salary | $50,000 | $50,000 |
| Her contribution | $0 (0%) | $2,000 (4%) |
| Employer match per year | $0 | $2,000 |
| Total going into her 401(k) per year | $0 | $4,000 |
| Per paycheck (26 biweekly paychecks) | $0 | $76.92 from her + $76.92 match |
| Instant return on her own contribution | N/A | 100% (before any investment growth) |
Illustrative example: $50,000 salary, 100% match up to 4%. Plans vary. Ignores taxes, raises, and vesting.
That last row is the key. Before the money is even invested, every dollar Big Sis puts in becomes two dollars. It’s hard to find a 100% instant return anywhere else, which is why many people treat getting the full match as one of their first money priorities.
What the match alone could grow to
Now let’s look at just the employer’s $2,000 a year, the part Little Sis gives up. We assumed it’s added monthly ($166.67 a month), invested, and grows at an assumed 7% average annual return, compounded monthly. Seven percent is an assumption for illustration, not a guarantee. Real returns vary from year to year and can be negative.
| Years | Total match received | Match value at an assumed 7% return |
|---|---|---|
| 10 | $20,000 | $28,847.47 |
| 20 | $40,000 | $86,821.11 |
| 30 | $60,000 | $203,328.50 |
| 40 | $80,000 | $437,468.90 |
Assumes the match stays $2,000/year (no raises), is fully vested, and earns an assumed 7% annual return compounded monthly, with no fees or taxes. Hypothetical, not a projection of any real investment. We calculated these with the standard future-value formula in Python; you can try your own numbers with the SEC’s Investor.gov compound interest calculator.
Over a 30-year stretch in this example, the match Little Sis skipped could be worth more than $200,000, and that’s not counting Big Sis’s own contributions or any raises. Want to see why time matters so much? That’s the whole story of Sister vs Sister #4: $200 a month at 22 vs 38.
How a 401(k) Match Works
A 401(k) is a workplace retirement plan. You choose a percentage of each paycheck to contribute, and the money goes into investments you pick from your plan’s menu. The IRS sets the rules, including how much you can contribute.
Common match formulas
- 100% up to a percentage (like our example): you put in 4%, they put in 4%.
- 50% up to a percentage: for example, 50 cents per dollar on the first 6% of salary. On $50,000, contributing 6% ($3,000) would get you a $1,500 match.
- Tiered formulas: for example, 100% on the first 3% and 50% on the next 2%.
The amount you need to contribute to “max the match” depends entirely on your plan’s formula, so look it up.
Watch out for vesting
Your own contributions are always yours. But the employer match may be subject to a vesting schedule, meaning you earn ownership of it over time. The IRS explains that 401(k) plans can offer anything from immediate vesting to 100% vesting after 3 years, or a graded schedule that increases each year of service. If you leave before you’re fully vested, you may lose some of the match.
Contribution limits
Your match is unlikely to bump into federal limits, but it helps to know them. According to the IRS, the employee elective deferral limit for traditional and safe harbor 401(k) plans is $24,500 in 2026, with an additional $8,000 catch-up contribution allowed for people age 50 and over if the plan permits it.
5 Steps to Claim Every Dollar of Your Match
- Find your match formula. Check your benefits portal, your plan’s summary plan description, or ask HR: “What’s the match, and what do I need to contribute to get all of it?”
- Set your contribution to at least the match percentage. If the match is 100% up to 4%, contribute at least 4%. Most plans let you change this online in a few minutes.
- Check whether the match is per paycheck. Some plans calculate the match each pay period. If you front-load your contributions and hit the annual limit early, you could miss matches later in the year unless your plan has a “true-up.”
- Pick your investments. Contributions sometimes land in a default fund. Look at what you’re invested in and its fees. Many people use a broadly diversified option like a target-date fund. Make sure it fits your timeline.
- Learn your vesting schedule. If you’re thinking about changing jobs, know how much of your match is vested before you go.
FAQ
What if I can’t afford to contribute the full match amount?
Start with what you can, even 1% or 2%, and raise it by 1% each time you get a raise. Since traditional 401(k) contributions come out before income tax, your take-home pay usually drops by less than the amount you contribute.
Should I contribute more than the match?
It depends on your goals, your debts, and your emergency savings. Getting the full match is a common first step. After that, people weigh things like paying off high-interest debt, building an emergency fund, and other accounts such as a Roth IRA. A qualified professional can help with your specific situation.
Is the match really “free money”?
It’s money your employer adds on top of your pay, as long as you contribute and stay long enough to vest. In that sense, yes. It’s part of your total compensation, and skipping it is a lot like turning down part of your pay.
Is 7% a guaranteed return?
No. We use 7% only as an assumed average annual return to illustrate compounding. Actual returns depend on your investments and the market, and can be higher, lower, or negative in any year.
The Bottom Line
Same job. Same salary. Same offer. In our example, Little Sis leaves $2,000 a year on the table, money that could grow to over $200,000 across 30 years at an assumed 7% return. Big Sis claims it with one setting change in her benefits portal.
Log in to your 401(k) this week, find your match, and make sure you’re getting all of it.
Watch the 45-Second Version
See Big Sis and Little Sis go head-to-head in Sister vs Sister, Episode #3:
▶ Watch the short video version on YouTube (@sistersndollars)
This post is for educational purposes only and isn’t financial, tax, or legal advice. Match formulas vary by employer, and returns are not guaranteed. See our Disclaimer for details, including our affiliate disclosure.
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