If your employer offers a 401(k) match, it may add money to your retirement account when you contribute from your paycheck.
The idea is simple. The wording often is not.
A benefits page might say, “We match 100% of contributions up to 4% of pay.” That does not mean the company matches everything you contribute. It means the company matches each dollar you contribute until your contribution reaches 4% of eligible pay.
A simple 401(k) match example
Imagine:
- You earn $75,000 a year.
- Your employer matches 100% of your contributions up to 4% of pay.
- Your full salary counts as eligible pay.
Four percent of $75,000 is $3,000. That is the most the employer would add under this example.
| Your contribution | You add | Employer adds | Total added |
|---|---|---|---|
| 2% of pay | $1,500 | $1,500 | $3,000 |
| 4% of pay | $3,000 | $3,000 | $6,000 |
| 6% of pay | $4,500 | $3,000 | $7,500 |
At a 4% contribution rate, you reach the full match. Contributing more can still increase your retirement savings, but it does not increase the match in this example.
Your employer may use a different formula.
The formula tells you the maximum match under the example. It does not tell you whether every dollar of pay counts, whether you are eligible immediately, or whether the employer contribution is already fully vested. Those are separate plan rules, which is why the benefits headline alone is rarely the whole answer.
How to read other matching formulas
Here are two common-looking examples.
”50% of contributions up to 6% of pay”
The employer adds 50 cents for every dollar you contribute. You must contribute 6% of pay to reach the maximum match.
The employer’s maximum is 3% of pay because 50% of 6% is 3%.
“100% of the first 3%, then 50% of the next 2%”
The employer matches the first 3% of pay dollar for dollar. It then adds 50 cents per dollar for the next 2%.
If you contribute 5% of pay, the employer adds an amount equal to 4% of pay.
The IRS uses this as an example of one permitted safe-harbor formula. It is not the formula used by every plan. (IRS)
Three details to check in your plan
The formula is the starting point. These details can change what you receive.
Eligible pay
The plan decides which compensation counts. Base salary may count while some bonuses, commissions, or pay earned before you became eligible may not.
Vesting
Your own contributions belong to you. Employer contributions may become fully yours over time. This is called vesting. (U.S. Department of Labor)
If you leave a job before becoming fully vested, you may lose part of the employer contribution. A focused vesting guide should be added before this production page links to the deeper example.
Contribution timing
Some employers calculate the match each paycheck. If you contribute a large amount early and stop contributing later in the year, you could miss matching money unless the plan performs a year-end correction called a true-up.
Check whether your plan has a true-up before changing the timing of your contributions.
Check your automatic contribution rate
Many plans enroll employees automatically at a starting percentage. That can be helpful, but the starting rate may be lower than the percentage needed for the full match. Compare the percentage on your pay stub or benefits portal with the cap in the matching formula before assuming the match is already maximized.
You do not need to change a contribution rate just because the plan offers a match. But knowing the gap between the current rate and the matching cap makes the next decision clearer.
If the formula uses eligible pay, the percentage may apply to a different number than the salary you have in mind. A bonus, commission, or pay earned before eligibility can be treated differently. The plan’s definition of compensation settles that question.
Does the employer match count toward your contribution limit?
The employer match does not reduce the amount you can contribute under the regular employee limit.
For 2026, the employee contribution limit for most 401(k) plans is $24,500. Employer contributions count toward a separate, higher combined limit. (IRS)
The limits can be confusing because several numbers apply. A focused 2026 limits guide should be added before this production page links to the full explanation.
What to check now
Open your benefits portal or Summary Plan Description and find:
- The matching formula.
- The definition of eligible pay.
- The vesting schedule.
- Whether matching is calculated per paycheck or for the full year.
- Your current contribution rate.
Rewrite the formula in one sentence:
For every dollar I contribute, my employer adds ___ until I contribute ___% of eligible pay.
That sentence gives you the numbers needed to calculate the maximum match.
The bottom line
A 401(k) match is not simply “free money.” It is a benefit with a formula and plan rules.
Start with the matching rate and cap. Then check eligible pay, vesting, and contribution timing. You do not need to master the entire retirement system to understand whether you are receiving the match described by your plan.