A valuable part of your compensation
A 100% match adds one employer dollar for each matched employee dollar; a 50% match adds fifty cents. Capturing an available match can therefore be a high-value use of contributions, subject to the plan’s eligibility, vesting, and withdrawal rules. Check those rules before treating every employer dollar shown here as fully yours.
This calculator models one match tier — one rate and one salary cap — then shows the annual match, the amount below that tier’s maximum, and what those employer dollars could compound into by retirement at an assumed 7% annual return. It does not by itself reproduce a multi-tier plan.
Decoding common match formulas
| Plan says | On an $80,000 salary it means |
|---|---|
| 100% up to 3% | Contribute $2,400 → employer adds $2,400 |
| 50% up to 6% | Contribute $4,800 → employer adds $2,400 |
| 100% up to 3% + 50% on next 2% | Contribute $4,000 → employer adds $3,200 |
For tiered formulas like the last row, run each tier through the calculator separately and add the annual match results. And remember vesting: employer money may take several years to become fully yours if you change jobs.
If you can’t reach the cap today
Move toward it in steps: raise your contribution by one percentage point now, then again at every raise — most plans let you automate the annual increase. Traditional salary deferrals generally reduce current taxable income; designated Roth deferrals do not. The take-home-pay effect therefore depends on the contribution type, withholding, and your tax situation. The IRS 401(k) overview explains that distinction, while your plan document controls the match and vesting details.
Method, example, and sources
How this calculator works
The model applies the entered match rate to the smaller of your contribution percentage and the plan cap. It multiplies that percentage by salary to estimate one year of employer contributions, then compounds the same annual match at the built-in 7% return assumption for the selected number of years, with each match added at year-end.
Worked example
With an $80,000 salary, a 4% employee contribution, and a 50% match up to 6% of salary, the model estimates a $1,600 annual employer match. The full single-tier match would be $2,400, so $800 remains uncaptured. Repeating and compounding the $1,600 annual match at 7% for 25 years produces about $101,198.
What the estimate leaves out
- The model handles one match tier and does not reproduce multi-tier, true-up, eligibility, payroll-frequency, or compensation-definition rules.
- Salary, the match formula, and the 7% return assumption remain constant; none is a forecast.
- Vesting, fees, taxes, contribution limits, withdrawals, and forfeiture of unvested employer money are excluded.
Primary sources
Frequently asked questions
How does a 401(k) employer match work?
Your employer contributes to your 401(k) based on what you contribute, up to a cap. A common formula is “50% of your contributions up to 6% of salary”: if you earn $80,000 and contribute 6% ($4,800), your employer adds 50% of that ($2,400). Contribute less than the cap and the employer contribution shrinks too.
What does “100% match up to 3%” mean?
For every dollar you put in, your employer puts in a dollar, until your contributions reach 3% of your salary. Beyond that threshold your contributions still grow your account, but they trigger no additional employer money.
Is the employer match really a 50–100% instant return?
A 100% match adds one employer dollar for each matched employee dollar, while a 50% match adds fifty cents. That is valuable compensation, but employer contributions may be subject to vesting and other plan rules, so money shown in the account is not always fully yours on day one. Check the plan document before treating the match as guaranteed.
What is 401(k) vesting?
Vesting is the schedule by which employer contributions become truly yours. Your own contributions are always 100% yours immediately, but employer money may vest gradually (e.g., 20% per year over 5 years) or all at once after a cliff (e.g., 3 years). Leave before vesting and you forfeit the unvested portion — check your plan document.
Do employer contributions count against my annual 401(k) limit?
Not against your employee deferral limit — that limit applies only to what you contribute from your paycheck. There is a separate, much higher combined limit for employee plus employer contributions. Both limits adjust most years; check irs.gov for the current figures.