IRA vs. 401(k) Calculator

Enter your current balances, annual contributions, employer match details, and expected return to compare how your IRA and 401(k) will grow over time.

Created by Luis GonzalezLast updated: May 9, 2026

How to Use This Calculator

1
Enter Your Current IRA Balance
Input the current balance of your Individual Retirement Account.
2
Enter Your Current 401(k) Balance
Input the current balance of your employer-sponsored 401(k) plan.
3
Set Annual Contributions for Each Account
Enter the amount you plan to contribute each year to both the IRA and the 401(k).
4
Enter the Annual Growth Rate and Time Horizon
Input the expected annual rate of return and the number of years until retirement.
5
Enter Employer Match Details
Input your employer's match percentage and the maximum dollar amount they will match on your 401(k).
6
Compare Future Values
Review the projected future value of both accounts side by side.

Example Calculation

A 35-year-old professional compares maxing out an IRA versus contributing to a 401(k) with employer match over 20 years.

Current IRA Balance

$40,000

Current 401(k) Balance

$60,000

Annual IRA Contribution

$6,000

Annual 401(k) Contribution

$10,000

Annual Growth Rate

Number of Years

Employer Match

50%

Match Cap

$5,000

Results

Future Value of IRA

approximately $401,572. Future Value of 401(k): approximately $587,380 (including $100,000 in employer match contributions). The 401(k) comes out ahead largely because of the employer match benefit.

Tips

Always Capture the Full Employer Match

Contribute at least enough to your 401(k) to get the maximum employer match. It is an immediate 50-100% return on your money that no IRA can replicate.

Use Both Accounts if Possible

After capturing the full 401(k) match, consider funding a Roth IRA for tax diversification, then return to the 401(k) for additional pre-tax savings.

Review 401(k) Investment Options

Some 401(k) plans have limited or high-fee fund choices. If your plan's expense ratios exceed 0.75%, the IRA's broader fund selection may partly offset the match advantage.

Account for 2025 Contribution Limits

The 2025 IRA limit is $7,000 ($8,000 if 50+) while the 401(k) limit is $23,500 ($31,000 if 50+). Higher 401(k) limits allow significantly more tax-advantaged saving.

Projecting Your Retirement Savings with an IRA vs. 401(k) Comparison

Understanding the potential growth of your retirement accounts is fundamental to securing your financial future. The IRA vs. 401(k) Calculator helps individuals project the future value of both their Individual Retirement Accounts (IRAs) and employer-sponsored 401(k) plans, accounting for contributions, growth rates, and crucial employer matching. For many Americans, these two account types form the bedrock of retirement savings, with a typical 401(k) balance for those nearing retirement (ages 55-64) standing around $220,000, while IRA balances can vary widely, often exceeding $100,000 for long-term investors.

The Financial Impact of Retirement Account Choices

The decision of how much to allocate to an IRA versus a 401(k) can have a profound impact on your long-term wealth accumulation. Beyond simply saving, these accounts offer distinct advantages that influence how quickly your money grows and how much you ultimately withdraw in retirement. For instance, a 401(k) often comes with an employer match, which is essentially a guaranteed return on a portion of your contribution, making it an immediate boost to your savings. Ignoring this match is akin to leaving money on the table, potentially sacrificing tens of thousands of dollars over a career. Conversely, IRAs typically offer a wider array of investment choices, allowing for greater customization and potentially higher returns if managed effectively. Understanding these nuances helps optimize tax advantages and investment diversification for a more robust retirement portfolio.

The Compound Growth Mechanics of Retirement Funds

The IRA vs. 401(k) Calculator utilizes the principle of compound interest to project the future value of your retirement savings. For the IRA, the calculation considers your current balance, annual contributions, and the expected annual growth rate over a specified number of years. The 401(k) calculation follows a similar logic but crucially incorporates the employer match, which significantly boosts the total future value.

The core formulas are as follows:

For the IRA:

futureValueOfIRA = (currentBalanceIRA + annualContributionIRA × (((1 + annualGrowthRate / 100)^numberOfYears - 1) / (annualGrowthRate / 100))) × (1 + annualGrowthRate / 100)^numberOfYears

For the 401(k), first calculate the total employer match:

totalEmployerMatch = ((annualContribution401k × employerMatchPercentage401k) / 100) × numberOfYears

Then, the future value of the 401(k) is:

futureValueOf401k = (currentBalance401k + annualContribution401k × (((1 + annualGrowthRate / 100)^numberOfYears - 1) / (annualGrowthRate / 100))) × (1 + annualGrowthRate / 100)^numberOfYears + totalEmployerMatch

Here, currentBalance is the initial amount, annualContribution is your yearly input, annualGrowthRate is the percentage return, and numberOfYears is the investment horizon. The employerMatchPercentage and matchCapDollarAmount ensure the employer's contribution is accurately factored into the 401(k) calculation.

💡 While planning for retirement, don't forget other long-term savings goals. Our 529 Plan Calculator can help you estimate your college savings for future education expenses.

Comparing Retirement Projections Over Two Decades

Consider a mid-career professional aiming to retire in 20 years. They currently have $25,000 in an IRA and $75,000 in their 401(k). They plan to contribute $6,500 annually to their IRA and $23,000 annually to their 401(k). Their employer offers a 50% match on 401(k) contributions, capped at $5,000 per year. They anticipate an average annual growth rate of 7% for both accounts.

Here's how to calculate their projected retirement savings:

Calculate IRA Future Value:
- Current Balance IRA: $25,000
- Annual Contribution IRA: $6,500
- Annual Growth Rate: 7%
- Number of Years: 20
- Using the formula, the future value of the IRA will be approximately $286,819.50.
Calculate 401(k) Future Value (including employer match):
- Current Balance 401(k): $75,000
- Annual Contribution 401(k): $23,000
- Employer Match Percentage: 50%
- Match Cap: $5,000
- Annual Growth Rate: 7%
- Number of Years: 20
- The total employer match over 20 years, considering the $5,000 cap, would be $5,000 × 20 = $100,000.
- Using the 401(k) formula, including the employer match, the future value of the 401(k) will be approximately $1,053,300.91.

In this scenario, by diligently contributing and leveraging the employer match, the 401(k) significantly outpaces the IRA, demonstrating the power of employer contributions.

💡 If you're a small business owner or self-employed, understanding your options is key. Our SEP IRA Calculator can help you evaluate a different type of retirement plan specifically for your situation.

Retirement Planning Context

Navigating retirement planning requires a keen understanding of IRS regulations and the potential impact of market dynamics. For 2024, the IRS allows individuals to contribute up to $7,000 to an IRA ($8,000 if age 50 or older), while 401(k) participants can contribute up to $23,000 ($30,500 if age 50 or older). These limits are critical for maximizing tax-advantaged growth. Beyond contributions, withdrawal rules also vary; for instance, distributions from traditional IRAs and 401(k)s are generally taxed as ordinary income in retirement, and typically incur a 10% penalty if withdrawn before age 59½, with some exceptions. Sequence-of-returns risk, the danger that poor market returns early in retirement could deplete a portfolio faster, is another crucial factor. Investors often mitigate this by having a more conservative asset allocation in the years immediately preceding and following retirement, ensuring a cushion against market downturns.

Regulations and standards that reference IRA vs. 401(k)

The fundamental structure and operation of IRAs and 401(k)s are governed by federal tax law, primarily the Internal Revenue Code (IRC) and regulations set forth by the Department of the Treasury and the Internal Revenue Service (IRS). Section 401(k) of the IRC specifically defines the rules for qualified cash or deferred arrangements, which are commonly known as 401(k) plans. This section outlines contribution limits, non-discrimination testing requirements (such as the Actual Deferral Percentage, or ADP, test), and distribution rules. Compliance means ensuring the plan operates within these defined parameters to maintain its tax-advantaged status, preventing penalties for both the employer and employees. Similarly, IRAs are defined under IRC Sections 408 (Traditional IRAs) and 408A (Roth IRAs), specifying contribution limits, eligibility based on income (for Roth IRAs), deductibility of contributions, and rules for rollovers and distributions. Adherence to these regulations is crucial for individuals to reap the tax benefits, such as tax-deferred growth in traditional accounts or tax-free withdrawals in Roth accounts, avoiding potential penalties for excess contributions or unqualified distributions. These regulations are updated periodically, requiring ongoing monitoring by plan administrators and individuals alike.

Frequently Asked Questions

What are the IRA and 401(k) contribution limits for 2025?

For 2025, the IRA contribution limit is $7,000 ($8,000 if 50+). The 401(k) employee deferral limit is $23,500 ($31,000 if 50+). The total 401(k) limit including employer contributions is $70,000.

Is an IRA or 401(k) better for retirement savings?

It depends on your situation. A 401(k) is generally better if your employer offers a match. An IRA typically offers wider investment selection and potentially lower fees. The ideal strategy is to contribute enough to the 401(k) for the full match, then fund an IRA, then direct additional savings back to the 401(k).

How does an employer 401(k) match work?

An employer match means your company contributes additional money based on your own contributions. A common formula is 50% of employee contributions up to 6% of salary. The match is subject to a vesting schedule, meaning you may need to work a certain number of years before you fully own the employer contributions.

Can I contribute to both an IRA and a 401(k) in the same year?

Yes. You can contribute to both up to their respective limits. However, if you are covered by an employer plan, your ability to deduct traditional IRA contributions may be limited based on income. Roth IRA contributions have separate income limits.