401(k)/IRA
Calculator

Planning your dream retirement?

Your retirement income can vary widely depending on the type of account that holds your savings and the assumptions you make about returns and tax rates during the accumulation and withdrawal periods.

A 401(k)/IRA calculator helps you estimate how much your retirement savings could grow over time based on your contributions, investment returns, and time horizon. By adjusting inputs such as contribution amounts, retirement age, and expected returns, you can test different scenarios and refine your strategy to assess whether you’re on track to meet your retirement goals and highlight any potential shortfalls.

How Does the 401(k)/IRA Calculator Work?

Step 1: Enter the details about your savings

In this section, you enter your current age and how much you contribute to your 401k/IRA account annually.

401(k)/IRA calculator savings section showing fields for current age and annual contribution amount

Step 2: Enter details about your distributions

Here, you enter the age you wish to retire, how long you foresee your retirement lasting, the before-tax return rate on savings, and the federal marginal tax bracket you fall in at the time of retirement.

401(k)/IRA calculator distributions section showing retirement age, length of retirement, before-tax return rate, and federal marginal tax bracket fields

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Step 3: Enter details about the accumulation section

In this step, you enter the before-tax return you expect your savings/investments to grow at before any taxes are deducted. Next, you enter the federal marginal tax bracket you are in while saving up for retirement.

401(k)/IRA calculator accumulation section showing before-tax return expectations and the federal marginal tax bracket while saving

Step 4: Review your results

Once you have entered all the data, you can click on calculate. The calculator will estimate how much you can withdraw each year in retirement to fund your lifestyle.

401(k)/IRA calculator results panel showing the estimated annual withdrawal available in retirement

Frequently Asked Questions

The 401(k)/IRA calculator helps you estimate how much your retirement savings could grow, including how much money you can withdraw annually once you retire.

The calculator projects your savings growth during the accumulation phase and then calculates how much you can withdraw each year based on your retirement timeline and assumptions.

Taxes affect both how your savings grow and how much income you keep in retirement, so including them gives a more realistic estimate.

The accumulation phase is when you’re saving and investing your funds. The distribution phase begins after retirement, when you start withdrawing from your savings.

Yes, you can adjust variables such as contribution amounts, return rates, and retirement age to compare scenarios.

Yes, the calculator allows you to assess whether your current plan is sufficient or if you need to increase contributions, adjust assumptions, or rethink your strategy to meet your retirement savings target.
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