401(k) Calculator
Models 401(k) growth with employer match, contribution increases, and long-term returns.
What 401(k) Calculator does
A 401(k) calculator helps you estimate how your retirement savings will grow over time based on the inputs you provide. You enter details like your current balance, annual contribution amount, employer match percentage, expected rate of return, and years until retirement, and the tool projects the future value of your account. This gives you a clear picture of whether you are on track to meet your retirement goals or if you need to adjust your savings rate. NerdWallet's version stands out for its clean, straightforward interface that guides you through each financial variable without overwhelming jargon. It includes specific fields for employer match and contribution increases, and it offers a side-by-side comparison of traditional versus Roth 401(k) outcomes. Unlike some competitors, the results are presented with clear year-by-year growth snapshots and a simple inflation adjustment toggle, making it easy to see how your purchasing power might change in retirement.
How to use the NerdWallet Financial Calculators 401(k) Calculator
- 1
Enter your current 401(k) balance in the starting balance field
- 2
Input your annual contribution amount and the percentage your employer matches
- 3
Set the expected annual rate of return and the number of years until you plan to retire
- 4
Review the projected account value and year-by-year growth chart to assess your retirement progress
Best for
This calculator is best for employed individuals who want a quick, easy-to-understand snapshot of their 401(k) growth, especially those who want to compare traditional and Roth options or factor in employer matching.
Limitations
- Results are based on estimated rates of return and may not reflect actual market performance
- Does not account for taxes, fees, or early withdrawal penalties
- Projection assumes consistent contributions and does not adjust for life changes or salary fluctuations
401(k) Calculator FAQ
- Can I use this calculator if I am self-employed or have a solo 401(k)?
- The tool is designed for traditional employer-sponsored 401(k) plans with payroll contributions, so it may not accurately reflect solo or self-employed retirement plan structures.
- How does the employer match input affect the final projection?
- Entering an employer match percentage increases the projected total, as the calculator adds the matched amount to your contributions each year, which then compounds along with your own savings.
- Does the calculator factor in inflation or taxes?
- There is an optional inflation adjustment toggle that shows real purchasing power, but the tool does not automatically deduct estimated taxes or account for plan-specific fees.
- What if I want to see the impact of increasing my contributions over time?
- You can input a contribution increase percentage or amount, and the model will show how gradually raising your savings rate accelerates the growth of your retirement balance.
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