401(k) Calculator

A 401(k) calculator estimates how much your workplace retirement account could grow by retirement using your current balance, salary, contribution rate, employer match, and expected return. It helps you see projected balance, yearly savings, long-term growth, and whether you are capturing your full company match.

A 401(k) calculator is a retirement planning tool that estimates the future value of a workplace retirement account. It combines your current 401(k) balance, salary-based employee deferrals, employer matching contributions, time until retirement, and assumed investment return to project how large the account could become. Instead of focusing only on your current balance, the calculator shows how regular payroll contributions and compounding may build wealth over decades.

People use a 401(k) calculator when deciding how much of each paycheck to contribute, whether they are receiving the full employer match, and how a change in retirement age could affect the final balance. It is also useful during job changes, raises, open enrollment, and annual financial reviews. A good 401(k) calculator turns abstract percentages into real dollar estimates, which makes it easier to judge whether your current savings rate is likely to support your retirement goals.

In real-world planning, a 401(k) calculator helps answer practical questions: Is contributing 6% enough? How much more could I have at retirement if I raise my contribution to 10%? What is the long-term value of an employer match? Because a 401(k) calculator separates employee contributions, employer contributions, and investment growth, it gives you a clearer picture of what comes from your own savings behavior and what comes from market compounding over time.

1. Enter your current age and planned retirement age to set the contribution and growth timeline.
2. Add your current 401(k) balance so the calculator includes money already invested.
3. Enter your annual salary and employee contribution rate as a percent of pay.
4. Type your employer match rate and the match cap, such as 50% up to 6% of salary.
5. Choose an expected annual return based on your long-term portfolio assumptions.
6. Click Calculate to view projected balance, annual contributions, employer match, growth, and estimated retirement income.

FV = B(1 + i)^m + C[((1 + i)^m - 1) / i]

• `FV` is the projected future 401(k) balance.
• `B` is your current 401(k) balance.
• `i` is the effective monthly return and `m` is months until retirement.
• `C` is the monthly employee contribution plus the monthly employer match.

Projected 401(k) Balance

This is the estimated account value at retirement after applying your current balance, ongoing contributions, employer match, and investment growth.

Annual Employee Contribution

This shows how much of your salary you are personally deferring into the plan each year before employer contributions are added.

Annual Employer Match

This is the estimated yearly company contribution based on your match formula. It helps you see the value of workplace benefits in actual dollars.

Total Future Contributions

This metric adds all projected employee and employer contributions between now and retirement. It excludes growth on those contributions.

Investment Growth

Investment growth is the portion of the final balance created by returns rather than new deposits. Over long periods, this often becomes the largest part of the account.

Assume the following inputs for a typical retirement saving plan:

• Current age: 32
• Retirement age: 67
• Current 401(k) balance: $45,000
• Annual salary: $90,000
• Employee contribution rate: 10%
• Employer match: 50% up to 6% of salary

First, the calculator converts the 10% employee deferral into a $9,000 annual contribution. Because the match formula is 50% up to 6% of salary, the employer contributes $2,700 per year. That creates a total annual contribution of $11,700, or $975 per month, before investment growth is applied. Assuming a 7% annual return over 35 years, the projected 401(k) balance is about $2,149,074.

The outcome shows why contribution rate and employer match both matter. Your direct savings power the plan, the company match boosts it immediately, and long-term compounding does the heaviest lifting later. Even a small increase in contribution rate can meaningfully change the ending balance when decades remain before retirement.