How a 401(k) employer match works, in plain English.
The match is one of the first workplace-plan numbers worth translating into actual dollars — but the formula has more than one moving part.
Start with the sentence your employer gives you.
A plan might say something like “50% of the first 6% of pay you contribute.” That sentence contains two different percentages. The 50% is the employer's matching rate on eligible employee contributions. The 6% is the portion of pay that the plan will consider for that match.
If someone earns $80,000 and contributes 10% of salary, the plan does not necessarily match all 10%. Under the example formula, only the first 6% of salary is eligible. Six percent of $80,000 is $4,800. A 50% match on that eligible amount is $2,400.
That is why “my company matches 50%” is incomplete by itself. You need the rest of the formula.
Three numbers matter.
| Number | What it tells you |
|---|---|
| Your contribution rate | How much of your pay you are directing into the plan. |
| Employer match rate | How much the employer adds for each eligible dollar you contribute. |
| Match cap | How much of your pay the employer will consider when calculating its match. |
The contribution rate that captures the full available match can differ from the match rate itself. Read the plan formula rather than guessing from a headline percentage.
Vesting is a separate question.
Your own salary deferrals belong to you. Employer contributions can be subject to a vesting schedule depending on the plan. That means the account may show an employer contribution that you would not fully keep if you left the employer before satisfying the vesting requirements.
When you use a calculator, treat the modeled employer match as an estimate of the contribution formula. Then check the plan's vesting language separately.
What the match does not tell you.
A generous match does not automatically mean the investment menu is excellent, and a weak investment menu does not make the match irrelevant. They are separate questions. First determine what the employer is adding. Then examine the funds, their expense ratios, their objectives and the choices actually available in your plan.
Terra separates those jobs on purpose: the match calculator handles the employer formula, while the 401(k) Reality Check gives historical context for representative fund types and expenses.
One click helps us see what needs improving. Terra does not send your calculator inputs or questionnaire answers with this feedback.
Turn your match formula into dollars.
Use your employer's actual wording, then take the next step into the fund menu.