Back to Financial Tools

401(k) Calculator

Project your future nest egg by modeling your 401(k) contributions, employer match, and long-term compound growth.

401(k) Retirement Calculator

Projected Balance at Age 65

$1,147,969

Your Contributions

$197,479

Employer Match

$112,488

Total Growth

+$838,002

Maximize Your 401(k) Retirement Savings

A 401(k) plan is a tax-advantaged, employer-sponsored retirement savings account native to the United States. It allows workers to save and invest a portion of their paycheck before taxes are taken out. The Calculay 401(k) Calculator projects how your investments will compound over time, giving you a clear picture of your eventual retirement nest egg.

The Power of Employer Matching

One of the most significant advantages of a 401(k) is the employer match. Many companies offer to match a portion of your contributions—for instance, a 100% match up to 3% of your salary.

  • Free Money: If your employer offers a match, you should strive to contribute at least enough to capture the full match. Failing to do so is essentially leaving "free money" on the table.
  • Accelerated Compounding: Because these matches are added directly to your invested principal, they begin earning compound interest immediately, drastically increasing your wealth towards the end of your career timeline.

Understanding Annual Returns & Inflation

Historical data shows that the S&P 500 averages a return of roughly 7% to 10% annually. Our calculator uses a default conservative return rate of 7%. However, remember that these are nominal returns. To understand your true purchasing power in retirement, you must mentally adjust for inflation (historically 2-3% per year).

Tax Note: Traditional 401(k) contributions lower your taxable income in the year they are made, but withdrawals in retirement are taxed as ordinary income. Conversely, Roth 401(k) contributions are made with post-tax money, meaning your withdrawals in retirement are completely tax-free.