401(k) Calculator — With Employer Match
Project your 401(k) balance at retirement with salary growth and employer match. See your contributions, employer match, and investment returns in a stacked chart.
401(k) Calculator
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Estimated Monthly Withdrawal (4% Rule)
$6,053/mo
Scenario Comparison
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Your Contributions vs. Employer Match vs. Investment Returns
At retirement, 74.7% of your balance comes from investment returns — not your own savings. The market does the heavy lifting over time.
Year-by-Year Snapshot
| Age | Your Contribs | Employer | Returns | Total |
|---|---|---|---|---|
| Age 30 | $0 | $0 | $0 | $25,000 |
| Age 34 | $20,081 | $10,041 | $12,486 | $67,608 |
| Age 38 | $42,683 | $21,342 | $39,251 | $128,276 |
| Age 42 | $68,122 | $34,061 | $86,181 | $213,364 |
| Age 46 | $96,753 | $48,377 | $161,219 | $331,349 |
| Age 50 | $128,978 | $64,489 | $275,048 | $493,515 |
| Age 54 | $165,247 | $82,624 | $441,996 | $714,867 |
| Age 58 | $206,068 | $103,034 | $681,238 | $1.02M |
| Age 62 | $252,013 | $126,007 | $1.02M | $1.42M |
| Age 65 | $290,218 | $145,109 | $1.36M | $1.82M |
The Formula
Each year, contributions grow on a monthly compounding basis. The employer match is calculated as: min(yourContribRate, matchLimit) × matchPercent × salary, added alongside your own contributions before compounding.
Variable Definitions
Employer Match
Free money added to your account. A "50% match up to 6%" means: if you contribute 6% of your salary, your employer adds another 3% (50% of 6%). Not contributing at least up to the match limit is leaving free money on the table.
Safe Withdrawal Rate
A widely cited guideline suggesting you can withdraw 4% of your portfolio annually in retirement without running out of money over a 30-year retirement.
Rate of Return
The annualized growth rate of your investments. The S&P 500 has returned approximately 7% annually after inflation over long periods.
How to Use This Calculator
- 1
Enter your current age and target retirement age.
- 2
Enter your current 401(k) balance, salary, and annual salary increase expectation.
- 3
Set your contribution rate — try at least the employer match limit to capture free money.
- 4
Enter your employer match structure. Example: "50% match up to 6%" → Match: 50, Limit: 6.
- 5
The chart below shows the three growth buckets over time — your contributions, employer contributions, and investment returns.
Common Applications
- Plan for retirement by calculating how much your 401(k) will grow with employer matching contributions over time.
- Compare the impact of different contribution rates on your tax savings and future nest egg balance.
- Evaluate whether increasing your contribution percentage to capture the full employer match is worth the reduction in take-home pay.
- Model the long-term effect of salary increases and catch-up contributions after age 50 on your retirement readiness.
Investment returns eventually dwarf contributions — the power of decades of compounding at work
Understanding the Concept
The 401(k) is the most powerful tax-advantaged savings tool available to most Americans. Contributions reduce your taxable income today (traditional 401k), and the employer match is an instant 50–100% return on that portion of your contribution — no investment can reliably beat that. The magic, however, is in the compounding returns. For a 30-year-old who maxes out their 401(k), investment returns will typically account for 70–80% of the final balance at retirement. The stacked area chart below makes this exponential effect immediately visible.
Frequently Asked Questions
Sources & References
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