Your 401(k) match explained: how it works and how to get all of it

A 401(k) match is money your employer adds to your retirement account when you contribute to it. It is part of your pay, but you only collect it if you put money in yourself. Yet the Department of Labor reports that about 30% of private-industry workers who had access to a workplace retirement plan in 2024 did not take part.

How matching formulas work

A match formula has two parts: the rate the employer matches at, and the cap on how much of your pay it applies to. Two common shapes, as examples:

• 50% of the first 6%. For every dollar you contribute, up to 6% of your salary, the employer adds 50 cents. Contribute 6% and you get 3% of salary from the employer. Contribute 10% and you still get 3%, because the match stops at 6%.
• 100% of the first 4%. Dollar for dollar up to 4% of salary. On a $60,000 salary, contributing 4% brings in $2,400 a year from the employer.

The number that matters is the contribution rate that unlocks the full match: 6% in the first example, 4% in the second. Below it you leave money behind; above it you are saving more, which is good, but no longer earning extra match.

Your plan's summary plan description or benefits portal states the exact formula. Look for three things: the match rate, the cap, and whether the match is calculated each paycheck or for the whole year. If it is calculated per paycheck, contributing a large amount early in the year and nothing later can mean missing part of the match, unless the plan does a year-end "true-up." Ask HR if it is not clear.

Vesting: when the employer money becomes yours

Your own contributions, the money taken from your paycheck, are always 100% yours. Employer contributions can come with a vesting schedule, meaning you earn ownership of them over time. Leave before you are fully vested and you forfeit the unvested part.

For matching contributions, US law sets the slowest schedules a plan may use:

Plans may vest faster, including immediately, and some plan types must: matches in a traditional safe harbor 401(k) must be fully vested at all times, and in an automatic-enrollment (QACA) safe harbor plan they must be fully vested within two years. You also become fully vested when you reach the plan's normal retirement age or if the plan is terminated.

Vesting matters most when you are weighing a job change. If you are a few months from a vesting date, it can be worth knowing exactly what you would give up by leaving now.

Why the match comes first

The DOL's retirement checklist tells workers to find out how much they need to contribute to get the full employer contribution. The reason is simple: no investment reliably turns a dollar into $1.50 or $2.00 the moment you invest it. A 50% match is an instant 50% return on the matched dollars, before any market growth.

That is why the usual order of priorities puts the full match very early: after a small starter emergency fund and alongside high-interest debt payments, but before most other investing. Whether you put the matched contributions in a traditional or Roth 401(k) is a separate decision, covered in our Roth vs traditional guide.

Worked example: $60,000 salary, 50% of the first 6%

Assumptions for illustration only: $60,000 salary that stays the same, a match of 50% of the first 6% of pay, contributions added at the end of each year, a 6% yearly return, no fees, and fully vested employer money.

Going from 3% to 6% costs $1,800 more of your own pay each year (less after tax savings if the contributions are pre-tax), and brings in another $900 of match. That extra match alone grows to $11,863 after 10 years and $71,152 after 30 years. Over 30 years, the full match by itself grows to $142,305: money the employer was offering to pay.

Real paths are bumpier. Salaries usually rise, which raises the match too, and returns vary from year to year. The gap between the rows is the point, not the exact totals. Our compound growth guide explains why the 30-year numbers are so much larger than the 10-year ones.

The 2026 limits

For 2026, the IRS limits employee deferrals to a 401(k) at $24,500. If you are 50 or older you can add a catch-up of $8,000, and people aged 60 to 63 get a larger catch-up of $11,250 instead. The limit is per person: if you work two jobs with two 401(k) plans, your deferrals in both count toward one $24,500.

Employer match does not use up your $24,500. It counts toward a separate, higher cap on everything added to your account in a year, $72,000 for 2026 (more with catch-ups), which applies per employer.

When you leave a job

Your vested balance goes with you. In general terms, you can:

• Leave it in the old plan, if the plan allows it. Small balances may be moved out automatically.
• Roll it into your new employer's plan, if that plan accepts rollovers.
• Roll it into an IRA, which usually gives you the widest choice of funds.
• Cash it out. The taxable amount counts as income, and you may owe an extra 10% tax on early distributions unless an exception applies. It also ends the tax-free compounding on that money.

If you roll over, ask for a direct rollover: the plan sends the money straight to the new plan or IRA and no tax is withheld. If the check is paid to you instead, the plan must withhold 20%, and you have 60 days to deposit the full amount, making up the withheld 20% from other savings, to avoid tax on it.

What to do this week

1. Find your plan's match formula in your benefits portal or summary plan description and write down the contribution rate that gets the full match.
2. Check your current contribution rate. If it is below that number, raise it today; a pay-period change takes minutes.
3. Look up your vesting schedule and the date you become fully vested.
4. If you have an old 401(k) from a previous job, decide whether to leave it or move it with a direct rollover.

General education, not personal financial advice. Figures are illustrations computed from the stated assumptions.