Short answer
A 401(k) match is money your employer adds to your retirement account based on what you contribute. A common formula is '100% of the first 3%, then 50% of the next 2%' — so contributing about 5% of your salary captures the full match. It's an instant, guaranteed return on your own money. Set it up from your first paycheck. Your own contributions are always yours; the match dollars may take a year or two to fully vest.
What 'match' actually means
When you put part of your paycheck into your 401(k), your employer deposits extra money alongside it, up to a cap. You don't apply for it — it's automatic once you contribute. If you contribute nothing, you get nothing; the match is the one part of your compensation you can accidentally decline.
Reading the formula
The most common formula looks like: "100% of the first 3% of salary, then 50% of the next 2%." Here's what that means on a $120,000 salary:
| You contribute | Employer adds | Free money/year |
|---|---|---|
| 0% | $0 | $0 |
| 3% | 3% (full on first 3%) | $3,600 |
| 5% | 4% (3% + half of next 2%) | $4,800 |
| 10% | 4% (match is capped) | $4,800 |
Contributing 5% here captures the entire match. Going higher is fine for your savings, but doesn't add more match.
Why it's genuinely free money
Capturing a 4% match on a 5% contribution is an immediate ~80% return on that portion — before the market does anything. No other line in your offer letter does that. Not contributing enough to get the full match is, in effect, choosing a pay cut.
Vesting: what's yours vs theirs
Your own contributions are always 100% yours, immediately. The employer's match may "vest" over time — either all at once after a set period (cliff) or gradually (graded), often over 2–4 years. If you leave before it vests, you may forfeit the unvested match. Your contributions and their growth are never forfeited.
Should visa holders contribute? What if you leave the US?
Yes — a 401(k) is yours regardless of immigration status. If you later leave the US, the account doesn't disappear: you can leave it invested, roll it into an IRA, or withdraw it (with income tax and usually a 10% early-withdrawal penalty before age 59½). The match isn't tied to your visa.
Contribution limits
As of 2025, the employee contribution limit was $23,500 (limits usually rise each year — check the current IRS figure). Importantly, the employer match does not count against your limit, so the match is on top of what you can contribute yourself.
Frequently asked
How much should I contribute to get the full 401(k) match?
Contribute at least up to your employer's match cap. For a '100% of 3%, 50% of next 2%' formula, that's about 5% of salary to capture the full 4% match.
Do I lose my 401(k) match if I leave the company?
You may forfeit the portion of the employer match that hasn't vested yet. Your own contributions and their growth are always yours and are never forfeited.
What happens to my 401(k) if I leave the US?
It remains yours. You can leave it invested, roll it into an IRA, or withdraw it — withdrawals are subject to income tax and usually a 10% early-withdrawal penalty before age 59½.
Does the employer match count toward my contribution limit?
No. The employer match is separate from your personal contribution limit, so it's added on top of what you put in.