401k Calculator

Plan your employer-sponsored retirement

Your Information
401k Details
401k Projection
At Retirement
Balance: $0.00
Years: 35
Employer Match Value: $0.00
Your Contributions: $0.00
Employer Match: $0.00
Investment Growth: $0.00
Monthly Contribution: $0.00
Annual Contribution: $0.00
2024 Limit: $23,000 ($30,500 if 50+)

What is a 401k Calculator?

A 401k calculator helps you project the growth of your employer-sponsored retirement account over time. It accounts for your contributions, employer matching, investment returns, and years until retirement to show your potential nest egg. This powerful tool helps you understand how small changes today impact your financial future decades from now.

Whether you're just starting your career or planning for retirement in a few years, this calculator shows exactly how much you'll accumulate. It highlights the incredible value of employer matching—essentially free money that doubles your savings power.

How to Use This Calculator

Step 1: Enter your current age and planned retirement age.
Step 2: Input your annual salary.
Step 3: Enter your current 401k balance (if any).
Step 4: Set your contribution percentage (aim for at least enough to get full employer match).
Step 5: Enter employer match percentage (typically 3-6%).
Step 6: Adjust expected annual return (7% is realistic long-term average).
Step 7: Click "Calculate" to see your retirement projection.

401k Strategies & Pro Tips

  • Max the Match: Always contribute enough to get 100% of employer match—free money with 100% return
  • Increase Gradually: Raise contribution 1% every raise or year—you won't feel the difference
  • Catch-Up at 50: Additional $7,500 allowed annually for those 50 and older
  • Diversify Investments: Don't leave money in cash; target-date funds simplify investing
  • Never Borrow: 401k loans derail retirement growth—explore other options first
  • Keep Old 401ks: Rollover to new employer or IRA—don't cash out when switching jobs

Frequently Asked Questions

What is a 401k?
A 401k is an employer-sponsored retirement savings plan. You contribute pre-tax dollars, reducing current taxable income. Money grows tax-deferred until retirement. Many employers match contributions, providing free additional savings. It's one of the most powerful wealth-building tools available to American workers.
How much should I contribute to my 401k?
At minimum, contribute enough to get full employer match—typically 3-6% of salary. Ideal target: 10-15% of income including match. Maximum: $23,000 in 2024 ($30,500 if age 50+). Financial advisors often suggest saving 15% of income starting in your 20s for comfortable retirement.
What is employer matching?
Free money your employer adds to your 401k when you contribute. Common match: 50% of your contributions up to 6% of salary, meaning if you put in 6%, employer adds 3%. Some match dollar-for-dollar. This is a 50-100% immediate return—never leave this money on the table.
When can I withdraw from my 401k?
Without penalties: Age 59½ and older. Exceptions: disability, certain medical expenses, first-time home purchase (limited), substantially equal periodic payments. Early withdrawals (before 59½) face 10% penalty plus regular income tax. Required minimum distributions start at age 73.
What happens to my 401k if I change jobs?
Options: 1) Leave it with old employer (if allowed), 2) Roll over to new employer's 401k, 3) Roll over to an IRA, 4) Cash out (avoid—taxes and penalties apply). Rollovers are tax-free if done correctly within 60 days. IRAs often offer more investment choices than employer plans.
Should I choose Traditional or Roth 401k?
Traditional: Pre-tax contributions, tax-deferred growth, taxed at withdrawal. Choose if current tax rate > expected retirement rate. Roth: After-tax contributions, tax-free growth, tax-free withdrawal. Choose if current rate < expected future rate, or for tax diversification. Many offer both—consider splitting contributions.
What should I invest my 401k in?
Target-date funds are simplest—automatically adjust allocation as you age. Or build portfolio: stock funds for growth (higher risk/reward), bond funds for stability, index funds for low costs. Avoid company stock concentration (no more than 5-10%). Diversify across asset classes. Lower fees = more money kept.
Can I lose money in my 401k?
Yes, investments fluctuate with markets. Short-term volatility is normal. Historically, diversified portfolios gain value over long term (10+ years). Don't panic during market downturns—keep contributing. Dollar-cost averaging (buying regularly) actually helps you buy more shares when prices are low.
Should I take a 401k loan?
Generally no. While you pay yourself interest, you lose market growth during loan period. If you leave job, loan becomes due immediately. Missed payments trigger taxes and penalties. Explore alternatives: emergency fund, personal loan, HELOC. Only use 401k loans as last resort for true emergencies.
How does 401k affect my taxes?
Traditional 401k contributions reduce taxable income now—immediate tax savings. Growth is tax-deferred. Withdrawals taxed as ordinary income in retirement. Roth 401k: No immediate tax deduction, but tax-free growth and withdrawals. Employer match always goes to traditional pre-tax account even if you choose Roth.
What if my employer doesn't offer 401k?
Alternatives: Open Traditional or Roth IRA ($7,000 limit in 2024, $8,000 if 50+). Self-employed: SEP IRA or Solo 401k with higher limits. Taxable brokerage account (no limits, no special tax treatment). Some employers offer Simple IRAs instead. Save anyway—retirement is your responsibility regardless of employer benefits.
When should I start contributing?
Immediately—today if possible. Time is your greatest advantage. Starting at 25 vs 35 can mean hundreds of thousands more at retirement due to compound growth. Even small amounts compound significantly over decades. Don't wait for "enough" money—start with whatever you can and increase gradually.