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Online 401K Calculator
Use our Online 401K Calculator to estimate the future value of your retirement savings based on your current balance, annual contributions, and expected rate of return.
Result
401(k) balance ($):1,537,963
401(k) balance equivalent in purchasing power today ($): 546,566
Self Contributions
Employer Match
Interest
| Total contributions ($) | 516,720 |
|---|---|
| Employee contributions ($) | 453,235 |
| Employer match ($) | 63,485 |
| Total interest ($) | 1,021,243 |
| Total payouts ($) | 2,047,081 |
| Withdrawing monthly ($) | 11,018 |
| Withdrawing annually ($) | 134,087 |
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What Is This Tool?
This calculator helps you project the growth of your 401(k) retirement savings over time. By inputting your current balance, annual contributions including employer matches, expected rate of return, and years until retirement, you receive an estimate of your projected 401(k) balance at retirement.
How to Use This Tool?
- Enter your current 401(k) balance (P).
- Input your total annual contribution amount (C), including employer match.
- Specify the expected annual rate of return as a decimal (r).
- Enter the number of years until your planned retirement (t).
- Click the calculate button to view your estimated future 401(k) balance (A).
Key Features
- Calculates future 401(k) balance using compound interest and recurring contributions
- Accepts inputs for current balance, annual contributions, rate of return, and retirement horizon
- Applies accurate financial formulas for long-term projection
- Provides clear breakdown of growth from initial balance and contributions
- Fast, browser-based, and easy to use
Examples
- If your current balance (P) is $20,000, annual contributions (C) are $6,000, the expected rate of return (r) is 7% (0.07), and you plan to retire in 25 years (t), the calculation will show:
- Growth on initial balance: 20,000 × (1.07)^25 ≈ 108,367
- Growth on contributions: 6,000 × [(1.07)^25 - 1] / 0.07 ≈ 316,816
- Total projected 401(k) balance: 108,367 + 316,816 = 425,183
Common Use Cases
- Employees estimating how their retirement savings will accumulate
- Financial planners helping clients forecast retirement portfolios
- Retirement advisors evaluating contribution and investment strategies
Tips & Best Practices
- Use realistic estimates for the annual rate of return based on historical data or financial advice.
- Include both your personal and employer contributions in the annual contribution input.
- Regularly update inputs to reflect changes in contributions or investment performance.
- Remember that results assume consistent return rates and contributions without market fluctuations.
Limitations
- Assumes a constant annual rate of return and fixed contribution amounts each year.
- Does not account for taxes, inflation, changes in salary, or market volatility.
- Uses standard floating-point precision which is suitable for long-term projections but not precise tax or legal calculations.
Frequently Asked Questions
- What does the variable P represent?
- P is your current 401(k) balance or existing principal at the start of your projection.
- How is the annual contribution factored in?
- Annual contributions (C) include both your own and the employer match and are compounded over time in the formula.
- Does the calculator consider taxes or inflation?
- No, it assumes fixed returns and contributions without adjusting for taxes or inflation.
Key Terminology
- P
- Current 401(k) balance or existing principal.
- C
- Annual contribution amount including employee and employer matches.
- r
- Annual rate of return expressed as a decimal.
- t
- Number of years until retirement.
- A
- Projected 401(k) balance at retirement after growth and contributions.