401K Calculator
Maximize your retirement savings with our 401(k) Calculator. Enter your current age, retirement age, current 401(k) balance, annual contributions, employer match percentage, expected returns, and salary increases to see your projected 401(k) balance at retirement. Perfect for retirement planning, evaluating contribution strategies, maximizing employer match benefits, or deciding between Roth and Traditional 401(k). The calculator shows employee contributions, employer match (free money!), and investment growth separately. All calculations happen instantly in your browser with no data storage.
How it works: Enter your age, current 401(k) balance, annual contributions, employer match, expected returns, and salary increases to project your retirement savings. The calculator accounts for compound growth and employer matching.
What Is a 401k Calculator?
A 401k calculator estimates your retirement account balance given your salary, contribution percentage, employer match formula, expected return, and years until retirement. The key variable most people underestimate is the employer match — a 50% match on the first 6% of a $80,000 salary adds $2,400/year in free contributions. At 8% annual return over 30 years, that $2,400/year match alone grows to $268,000. Missing out on the full match by contributing less than 6% is leaving six-figure money on the table.
How to Use This 401k Calculator
Enter your annual salary, contribution percentage, employer match formula (e.g., “50% up to 6%”), current balance, expected annual return, and years to retirement. The calculator shows your projected balance, total personal contributions, total employer contributions, and total tax-deferred growth. Set your contribution to at least the match threshold first, then increase toward the $23,000 annual limit if possible.
Worked Example: Jessica at 30 Contributes 10% with 50% Match
Jessica earns $75,000 and contributes 10% ($7,500/year). Her employer matches 50% on the first 6% ($2,250/year). Starting balance: $8,000. Return: 8%. Years to 65: 35.
401k balance at 65: ~$1,850,000
Personal contributions: $262,500 | Employer match: $78,750 | Growth: ~$1,510,000
Employer match alone compounds to ~$350,000
Monthly income at 4% withdrawal: ~$6,167/month
Employer Match Formulas — $80,000 Salary Comparison
| Match Formula | Your Contribution | Employer Match/Year | Match Value at 30 Years (8%) |
|---|---|---|---|
| 50% of first 6% | $4,800 (6%) | $2,400 | ~$268,000 |
| 100% of first 3% | $2,400 (3%) | $2,400 | ~$268,000 |
| 100% of first 6% | $4,800 (6%) | $4,800 | ~$536,000 |
| 25% of first 8% | $6,400 (8%) | $1,600 | ~$179,000 |
| No match | Any | $0 | $0 |
2024–2025 401k Contribution Limits
| Limit Type | Under 50 | Age 50+ (Catch-up) |
|---|---|---|
| Employee contribution limit | $23,000 | $30,500 |
| Total (employee + employer) | $69,000 | $76,500 |
Tips for Maximizing Your 401k
Always contribute at least enough to capture the full employer match — it's an instant 50–100% return on that portion. Increase your contribution by 1% each year (especially with raises) to painlessly grow your savings rate. If your plan offers both Traditional and Roth 401k options, consider splitting contributions for tax diversification. In your 50s, use the $7,500 catch-up contribution to accelerate savings. Review your fund expense ratios — moving from a 1% expense ratio to a 0.05% index fund on a $200,000 balance saves over $190,000 in fees over 30 years.
Frequently Asked Questions About 401k Calculators
What is the 401k contribution limit for 2024?
$23,000 for employees under 50. $30,500 for those 50 and older (including $7,500 catch-up). The total limit including employer contributions is $69,000 ($76,500 with catch-up). These limits apply per plan, not per employer.
How does the 401k employer match work?
The most common match is 50% up to 6% of salary. At $80,000 salary, you contribute 6% ($4,800) and get $2,400 free. If you only contribute 3%, you get $1,200 match and leave $1,200 on the table. Always contribute at least to the match threshold — it's the highest guaranteed return available.
What is vesting in a 401k?
Vesting determines when the employer match becomes yours. Cliff vesting: 100% after 3 years. Graded vesting: 20% per year from years 2–6. Your own contributions are always 100% vested immediately. If you leave before being fully vested, you forfeit unvested employer contributions.
Should I choose Traditional or Roth 401k?
Traditional 401k reduces taxable income now and is taxed on withdrawal. Roth 401k is taxed now but withdrawals are tax-free. Young earners in the 12–22% bracket benefit more from Roth. High earners in 32%+ bracket often prefer Traditional. A 50/50 split creates tax diversification in retirement.
What happens to my 401k if I change jobs?
You can: 1) Roll it over to your new employer's 401k, 2) Roll it to an IRA (more investment options, often lower fees), 3) Leave it with the old employer if over $5,000, or 4) Cash it out (worst option — triggers income tax plus 10% penalty if under 59½). An IRA rollover preserves all tax advantages.
What return rate should I use for 401k projections?
6–8% is a realistic range for a diversified stock/bond portfolio. An all-stock target-date fund may average 8–10% (nominal). Subtract 2–3% for inflation to get real purchasing power. Most 401k calculators use 6–7% for conservative planning and 8% for moderate scenarios.