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401k Calculator

Estimate the future value of your 401(k) retirement account. See how your contributions, employer match, and compound interest can grow your nest egg over time. Plan your retirement with confidence.

401(k) Plan Details

Please enter valid positive numbers for all fields.
Limit: $23,000 ($30,500 age 50+)
Common: 50% match up to 6% of salary
Yearly increase in contribution amount

401(k) Projection:

Enter your 401(k) details and click "Calculate 401k Growth"

Understanding Your 401(k) & Employer Match

💰 What is a 401(k)?

A 401(k) is an employer-sponsored retirement savings plan that allows employees to contribute a portion of their pre-tax salary. Many employers offer matching contributions, which is essentially "free money" toward your retirement. Investment earnings grow tax-deferred until withdrawal.

📐 401(k) Growth Formula

Future Value = P(1 + r)n + C × [((1 + r)n - 1) / r]

Where:
P = Current balance
r = Annual rate of return
n = Number of years
C = Annual contribution (employee + employer match)

Example: Age 30, retiring at 65 (35 years), $25,000 balance, $60,000 salary, 10% contribution ($6,000/year), 50% match on first 6% ($1,800/year), 7% return
Total annual contribution = $7,800
Future Value ≈ $1,150,000+

📊 401(k) Contribution Limits

Annual 401(k) contribution limits
Age GroupEmployee Contribution LimitTotal Limit (Employee + Employer)
Under 50$23,000$69,000
Age 50+ (Catch-up)$30,500$76,500

401(k) FAQs & Key Considerations

❓ How does employer matching work?
Common match formulas include:
• 100% match on first 3% of salary + 50% match on next 2% (total 4% match on 5% contribution)
• 50% match up to 6% of salary (3% match on 6% contribution)
• Dollar-for-dollar match up to 4-6% of salary
Always contribute enough to get the full employer match — it's an instant 50-100% return on your money!

❓ When can I withdraw from my 401(k)?
• Age 59½: penalty-free withdrawals
• Age 55: penalty-free if separated from service
• Age 72: Required Minimum Distributions (RMDs) begin
Early withdrawals before 59½ incur a 10% penalty plus income taxes.

❓ What's the difference between Traditional and Roth 401(k)?
• Traditional: Pre-tax contributions, taxes due upon withdrawal
• Roth: After-tax contributions, tax-free withdrawals in retirement
Many employers now offer both options.

❓ What investment return should I assume?
• Conservative (bonds): 4-5%
• Moderate (60/40 stocks/bonds): 6-8%
• Aggressive (80%+ stocks): 8-10%
Historical S&P 500 average: ~10%

❓ Can I borrow from my 401(k)?
Most plans allow loans up to 50% of your vested balance ($50,000 max). Loans must be repaid with interest, typically within 5 years. Defaulting triggers taxes and penalties.

💡 Pro Tip: The single most effective way to boost your 401(k) balance is to increase your contribution rate by 1% each year until you reach at least 15% of your salary. Most people don't notice a 1% decrease in take-home pay but see dramatic growth over time.