401(k) Calculator

How to Use the 401(k) Calculator

Our free 401(k) calculator helps you project how much your retirement savings will grow over time. Enter your current 401(k) balance, annual contribution amount, employer match details, expected annual rate of return, and the number of years until retirement. The calculator instantly shows your projected future value, broken down into personal contributions, employer match contributions, and investment growth from compound returns.

Understanding the power of compound growth and employer matching is essential for retirement planning. Even small increases in your annual contribution can produce dramatically different outcomes over 20 or 30 years. Use this tool to experiment with different contribution levels and see how maximizing your employer match accelerates your savings.

Maximizing Your 401(k) Growth

The most important step is to contribute at least enough to receive the full employer match. If your employer matches 50% of your contributions up to 6% of your salary, contributing less than 6% means leaving free money on the table. After capturing the full match, consider increasing contributions annually, especially after raises, until you reach the IRS annual limit ($23,000 for 2024, or $30,500 if you are age 50 or older).

The Power of Starting Early

Compound growth rewards time in the market more than any other factor. An employee who starts contributing $500 per month at age 25 will accumulate significantly more than someone contributing $1,000 per month starting at age 40, even though the late starter contributes more total dollars. Starting early gives your investments more years to compound, turning modest contributions into substantial wealth.

Choosing the Right Asset Allocation

Your expected rate of return depends heavily on your asset allocation. Younger investors with decades until retirement can typically afford a higher stock allocation (80-100%), which historically returns 7-10% annually. As you approach retirement, gradually shifting toward bonds reduces volatility and protects your accumulated savings. Target-date funds automatically adjust this balance based on your expected retirement year.

Frequently Asked Questions

How much should I contribute to my 401(k)?

Financial experts generally recommend contributing at least enough to get the full employer match, which is essentially free money. Beyond that, aim to save 10-15% of your pre-tax income for retirement. The 2024 contribution limit is $23,000 ($30,500 if you are 50 or older).

What is an employer 401(k) match?

An employer match is when your company contributes additional money to your 401(k) based on your own contributions. A common example is a 50% match up to 6% of your salary, meaning if you contribute 6% of your pay, your employer adds an additional 3%.

What is a good rate of return for a 401(k)?

The historical average annual return of the S&P 500 is about 10% before inflation and roughly 7% after inflation. A conservative estimate for long-term 401(k) planning is 6-8% annual returns, depending on your asset allocation between stocks and bonds.

When can I withdraw from my 401(k) without penalty?

You can withdraw from a traditional 401(k) without the 10% early withdrawal penalty starting at age 59 and a half. Withdrawals are taxed as ordinary income. Required minimum distributions begin at age 73 for most people.

Should I choose a traditional or Roth 401(k)?

A traditional 401(k) reduces your taxable income now and you pay taxes on withdrawals in retirement. A Roth 401(k) is funded with after-tax dollars but withdrawals in retirement are tax-free. If you expect to be in a higher tax bracket in retirement, a Roth may be better.