IRA Calculator (Traditional vs Roth)

Estimates growth with annual compounding and contributions made at the beginning of each year. Shows Traditional (before/after tax) vs Roth (after tax).

🇺🇸USA caps (2025/2026)
Caps auto-apply based on age (50+ gets catch-up).
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Important: This tool provides educational estimates only and isn’t tax or investment advice. Actual results depend on fees, investment choices, taxes, and IRS rules.

Results

Traditional (before tax) at retirement
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Traditional (after tax) at retirement
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Roth (after tax) at retirement
$0
Est. yearly tax deduction (Traditional)
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Blue = Traditional (before tax). Green = Roth (after tax). (Comparison mode)

Choosing Your IRA Path: A Practical View

The core choice for most people is between a traditional and a Roth IRA (individual retirement account), and it boils down to when you want to deal with taxation. In my practice as a CFP®, I’ve helped many clients see that if you expect your marginal tax rates to be lower in retirement, the traditional route is often more financially beneficial. Why? Because your contributions are tax-deductible now, letting you invest more upfront, and you only get taxed on withdrawals later. Conversely, with a Roth IRA, you use after-tax money for contributions, but all future withdrawals are completely tax-free. Both types are powerful tools to accumulate wealth, far outpacing regular taxable savings or investments because of their built-in tax shields. This advantage is critical, as data from the Employee Benefit Research Institute (EBRI) Retirement Security Research Center consistently shows a significant gap between those who save in employer plans or IRAs and those who do not, underscoring the importance of using these accounts.

For business owners, the landscape expands. If you’re self-employed or a contractor with no employees, a SEP (Simplified Employee Pension) IRA is wonderfully straightforward and allows large contributions. For small businesses with up to 100 employees, the SIMPLE IRA is a popular, practical choice that helps you and your team save. The key is to move beyond just standard savings; these specialized accounts are designed for long-term retirement growth. From my experience, the biggest mistake isn’t picking the “wrong” IRA—it’s not using one at all and leaving those tax shields on the table.

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Navigating Your IRA Options and Rollovers

Understanding the Core IRA Choices

When you’re saving for the future, the type of IRA you pick sets the rules for your taxation. I often explain it like this: with a traditional IRA, you get a break now. Your contributions are typically tax-deductible, which can immediately reduce your current tax bill. The funds grow tax-deferred, and you only face taxation when withdrawing in retirement. You must begin taking Required Minimum Distributions (RMDs) by age 73 (as per the SECURE 2.0 Act). Take money out early, though, and those early withdrawals are penalized except in rare qualified cases. Most people are eligible, but it depends on your tax-filing status and gross income.

The Roth IRA flips the script. Here, contributions come from your after-tax income, so there’s no upfront deduction. But the trade-off is powerful: all investment income grows tax-free, and withdrawals in retirement are also completely tax-free. This tax-free growth is a unique advantage that can profoundly impact long-term wealth, a benefit highlighted in research from sources like the Center for Retirement Research at Boston College. It’s crucial to check the IRS income limits for Roth IRA contributions, as they phase out for higher earners. There’s no mandatory distribution during the owner’s lifetime, allowing the account to grow untouched. This makes it a favorite for those who expect to be in a higher tax bracket later. For detailed information and running calculations, a Roth IRA calculator is an essential tool.

Specialized Plans for Business Owners and Employees

If you’re self-employed or run a small business, your options expand. The SEP IRA (Simplified Employee Pension) is initiated by employers and is notably easier to set up than a 401(k). It functions similarly to traditional IRAs in its tax treatment. For 2025, contribution limits are generous—the lesser of 25% of compensation or $69,000—which is nearly ten times the standard IRA limit. Contributions are deductible as business expenses, and proceeds are immediately 100% vested for employees. There’s no catch-up contribution for those age 50 or older, and all eligible employees must receive the same benefit percentage.

For small businesses with 100 or fewer employees, the SIMPLE IRA (Savings Incentive Match Plan for Employees) is a standout. Its administrative costs are much lower than a 401(k). Employers must choose between two contribution options: a dollar-for-dollar match of employee contributions up to 3% of compensation, or a non-elective 2% contribution for all eligible employees. In 2025, employees can contribute up to $16,000 (plus a $3,500 catch-up for those over 50). Important Warning: The early withdrawal penalty for a SIMPLE IRA is a steep 25% if withdrawn within the first two years of participation, much higher than the standard 10% penalty for other IRAs.

Navigating the Rollover Process

Life changes, and so might your retirement savings. IRA rollovers let you move existing funds from qualified retirement plans like 401(k)s, 403(b)s, or other IRAs into a traditional IRA. The good news? When done as a direct rollover between institutions, there are no taxes withheld. However, you must report all rollovers on your tax returns. You’ll encounter two key IRS forms: Form 1099-R to report distributions from your old plan, and Form 5498 to report contributions to your new IRA.

A rollover doesn’t limit your investment options. You can even have rollover funds and annual contributions in the same IRA, though traditional and Roth assets must be kept in separate accounts. Remember, rolling over is just one option. Some choose to leave assets in a former employer’s plan, while others move them to a new employer’s plan. The last-resort option is to cash out, but this results in hefty early withdrawal penalties and immediate income taxes.

Decoding Retirement Accounts: IRAs vs. 401(k)s

How IRAs Stack Up Against Employer Plans

Choosing between a traditional IRA and a 401(k) can feel overwhelming, but they start from the same powerful goal: incentivizing saving for retirement. Both are tax-advantaged, defined contribution plans. You can contribute to both in the same tax year. For 2025, that means you could put $23,000 ($30,500 if 50+) towards a 401(k) and another $7,000 ($8,000 if 50+) towards a traditional IRA—though deductibility of the IRA contribution phases out at higher incomes if you are covered by a workplace plan.

While they share similarities, the key differences are crucial. A traditional IRA can be opened by you individually at most financial firms. A 401(k), however, is an employer-sponsored program. The main difference? 401(k)s have a much higher contribution limit and usually offer a company match. My rule of thumb is always this: if your 401(k) has a match, contribute at least enough to get the full match—that’s free money. After that, you can direct extra savings to an IRA for greater investment choice and control.

Another big split is in choice and cost. 401(k)s are often limited to a menu of investment options chosen by your employer and can have higher administrative fees. Traditional IRAs, in contrast, provide virtually limitless investment options at most brokers. This freedom is why many savvy savers use both.

The Small Business Alternative: SEP & SIMPLE IRAs

What if you own a business or work for a smaller company? Traditional IRAs don’t offer company matching. This is where SEP and SIMPLE IRAs come in. These plans are designed for smaller companies and the self-employed. They offer structured ways for employers to contribute. For example, a SIMPLE IRA requires employer contributions, creating a valuable employee benefit. You can learn more about the specific rules for these plans on the official IRS website.

Your IRA’s Power: It’s All About Your Investment Choices

Building Your Portfolio Within an IRA

A major benefit of IRAs is the breadth of investment options available through most financial firms. Let’s walk through the common options:

Keep in mind: All managed investments charge fees (expense ratios). These can range from below 0.10% for index funds to over 1% for actively managed funds, so it pays to look closely. For perspective on national savings trends, the Federal Reserve’s Survey of Consumer Finances provides valuable data on retirement account holdings.

Beyond Stocks and Bonds: The Advanced IRA

The World of Self-Directed IRAs (SD-IRAs)

Most people think an IRA only holds stocks and mutual funds, but there’s a more adventurous path: the Self-Directed IRA (SD-IRA). It maintains the same tax rules as a Traditional or Roth IRA but allows you to invest in alternative assets. The IRS permits investments like:

However, SD-IRAs are complex and niche. They are only recommended for sophisticated investors who are willing to do thorough due diligence and work with a specialized custodian. The IRS has a strict list of prohibited transactions, including buying property for personal use or investing in collectibles. Making a mistake can disqualify the entire account, triggering taxes and penalties. Always consult IRS Publication 590 and a qualified professional before proceeding.

IRA Calculator Formula and Application

Understanding the math behind growth can be motivating. The future value of an IRA is driven by the compound interest formula with regular contributions:

Future Value (FV) = P × (1 + r/n)^(nt) + PMT × [((1 + r/n)^(nt) – 1) / (r/n)]

Where:

Simplified Example: Starting with $1,000, adding $6,000/year, at a 7% annual return for 30 years yields approximately $567,434.

Key Takeaway: The power comes from time, consistent contributions, and compounding. Even small increases in your contribution or starting earlier can lead to dramatically larger sums.

IRA Case Study: The Late-Starter Strategy

Profile: Maya, Age 55 | Retirement Age: 65 | Current Savings: $45,000 | Annual Income: $85,000
The Challenge: With only 10 years to retirement, Maya needed an aggressive catch-up strategy.
The “Triple Catch-Up” Strategy:

  1. Max-Out Contributions: She committed to the maximum $8,000/year (including catch-up).
  2. Conservative-Aggressive Allocation: 70% S&P 500 index funds / 30% dividend stocks (accepting moderate risk for higher potential growth).
  3. Annual Increase Discipline: She increased contributions by 3% annually.

The Turning Point: At age 62, she used a $25,000 inheritance to execute a partial Roth IRA conversion during a market downturn, paying taxes at her then-current rate to create tax-free income later.

Outcome at Age 65:

Why This Case Study is Instructive: It demonstrates that starting late requires intentionality, a disciplined savings rate, and smart tax strategy. Using an IRA calculator, Maya also saw that working until 67 could grow her portfolio to over $310,000.

Final Lesson: “Starting late doesn’t mean thinking small. It means being more intentional with every dollar and every tax advantage.” Your next step should be to consult with a financial advisor to tailor a plan to your specific circumstances, income, and retirement goals.

Planning for retirement works best when your entire financial picture is aligned. Along with this IRA Calculator, use our Debt Payoff Calculator to eliminate high-interest debt faster, the Amortization Calculator to understand long-term loan costs, and the Credit Card Payoff Calculator to reduce balances efficiently—so you can invest more confidently toward your retirement goals.

Disclaimer Notice
Before making any financial decisions or taking any action, you must consult with a qualified and licensed financial advisor, accountant, or other professional who can provide advice tailored to your individual circumstances.