401(k) Match Calculator
Are you leaving free money on the table? Find your true match cap.
Free money you're capturing
$1,200 / yr
⚠️ Bump contribution to 6% to capture full match — that's $1,200 of free money every year.
A 401(k) match calculator answers one specific question: what is the minimum you must contribute to collect every dollar your employer offers? Match formulas are written in a way that is easy to misread, and contributing below the threshold means walking away from part of your compensation.
The match is the highest-guaranteed-return money in personal finance. A 50% match is an instant 50% gain on that portion of your contribution, before the market adds anything on top.
This tool translates your employer's formula into a plain contribution target and shows the annual dollars at stake if you fall short.
How this calculator works
Match formulas usually take the form of a rate applied up to a percentage of salary. A 50% match up to 6% of pay means: for every dollar you contribute up to 6% of salary, the employer adds 50 cents, so at a full 6% deferral they contribute 3% of your salary. On a $60,000 salary, contributing 6% ($3,600/year) earns the full $1,800 employer match. Contribute only 3% ($1,800) and the employer adds just 50% of that, $900, leaving $900 per year unclaimed. The key number is the contribution percentage that reaches the top of the match, here 6%, not the match rate itself. A dollar-for-dollar (100%) match up to 4% works the same way: deferring 4% captures a 4%-of-salary contribution.
What affects the number
- Match rate vs match cap: the percentage they match (e.g., 50%) and the salary percentage it applies up to (e.g., 6%) are two different numbers; you must hit the cap to get the full match.
- Your contribution threshold: to capture a 50%-up-to-6% match you must defer the full 6% yourself, not 3%.
- Per-paycheck timing: if the match is calculated each pay period, front-loading contributions early in the year can cause you to miss match on later paychecks (unless the plan offers a true-up).
- Vesting schedule: matched dollars may require several years of service before they are fully yours, so leaving early can forfeit unvested match.
- Salary changes and bonuses: because the match is a percentage of pay, raises increase both your target contribution and the match dollars available.
- Annual IRS limits: your own deferrals are capped each year, but capturing the match generally requires far less than the maximum, so the match is achievable even on a modest budget.
Frequently asked questions
What does a 50% match up to 6% actually mean?
It means your employer adds 50 cents for every dollar you contribute, but only on contributions up to 6% of your salary. To get the maximum, you must contribute a full 6% of pay yourself; the employer then adds 3% of your salary. If you contribute less than 6%, you receive a proportionally smaller match and leave money unclaimed.
How do I know if I am leaving free money on the table?
Find the salary percentage at which your match caps out, then compare it to what you actually contribute. If your deferral is below that cap, you are forfeiting employer dollars. For example, a 50%-up-to-6% match on a $60,000 salary is worth $1,800 a year at full participation, and contributing only 3% would surrender $900 of it annually.
Is the 401(k) match really free money?
Effectively, yes, though it is part of your total compensation. There is no other place you can earn an immediate 50% or 100% return with no market risk. The main catch is vesting: you may need to stay employed for a set number of years before the matched funds are fully yours to keep.
What happens to the match if I leave my job?
Your own contributions and their growth are always 100% yours. Employer match dollars are only yours to the extent you are vested under the plan's schedule, which can be immediate, graded over several years, or cliff-based. Any unvested match is forfeited when you leave, so check your vesting status before changing jobs.
This calculator provides general estimates for educational purposes only and is not financial, tax, or investment advice. Your actual results depend on your specific situation, tax rules, market returns, and the current year's IRS limits.