Home Back

401k Calculator Nerdwallet

401k Growth Formula:

\[ FV = Contribution \times \frac{(1 + r)^n - 1}{r} \times (1 + r) \]

USD
%
years

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is the 401k Calculator?

The 401k calculator estimates the future value of your retirement savings based on your annual contributions, expected rate of return, and number of years until retirement. It uses the standard future value formula for regular contributions.

2. How Does the Calculator Work?

The calculator uses the 401k future value formula:

\[ FV = Contribution \times \frac{(1 + r)^n - 1}{r} \times (1 + r) \]

Where:

Explanation: The formula accounts for compound growth of your contributions over time, assuming regular annual contributions.

3. Importance of 401k Planning

Details: Proper retirement planning helps ensure financial security in your later years. Understanding your 401k growth potential helps you make informed contribution decisions.

4. Using the Calculator

Tips: Enter your annual 401k contribution, expected annual return rate (typically 5-8% for balanced portfolios), and number of years until retirement.

5. Frequently Asked Questions (FAQ)

Q1: What's a good contribution amount?
A: Most experts recommend saving 10-15% of your income, including any employer match.

Q2: What rate of return should I expect?
A: Historically, stock market returns average 7-10% annually, but more conservative estimates use 5-6%.

Q3: Does this account for employer matching?
A: No, you should include employer match in your total annual contribution amount.

Q4: What about inflation?
A: This shows nominal dollars. For real value, reduce the rate by expected inflation (typically 2-3%).

Q5: Can I change contributions over time?
A: This assumes constant contributions. For variable contributions, use more advanced calculators.

401k Calculator Nerdwallet© - All Rights Reserved 2025