Traditional IRA vs. Roth IRA: The Real Difference That Changes Your Retirement

Traditional IRA vs. Roth IRA: The Real Difference That Changes Your Retirement

If you have ever stared at a retirement account application and genuinely wondered which box to check, Traditional IRA or Roth IRA, you are not alone. The wrong choice, compounded over 20 or 30 years, does not just cost you a few thousand dollars. It can cost you six figures in unnecessary taxes at the exact moment you can least afford to pay them.

Here is what we are going to cover: how these two accounts work, who each one is built for, the income rules that might take one of them off the table for you right now, and the one move high earners use when the Roth door appears to be closed but actually is not. Before we get into the numbers and income rules, there is one sentence that captures the entire difference between these two accounts.

A Traditional IRA gives you a tax break today and a Roth IRA gives you a tax break in retirement.

With a Traditional IRA, you put money in and, in most cases, you can deduct that contribution from your taxable income right now. The money grows tax-deferred, meaning you do not owe taxes on the gains year after year. However, when you pull the money out in retirement, every dollar you withdraw gets taxed as ordinary income. The IRS gave you the deduction upfront and has been patient ever since, but eventually it collects.

With a Roth IRA, there is no deduction when you contribute. You are putting in after-tax dollars, money you have already paid income tax on, but from that point forward, the IRS is done with it. The growth is tax-free and qualified withdrawals in retirement are completely tax-free. You pay the tax once, at the beginning, and you never deal with it again. A qualified withdrawal from a Roth IRA means you are at least 59.5 years old and the account has been open for at least five years. Meet these two conditions and you can pull money out for the rest of your life without paying any additional taxes or penalties.

So the question is not "which account is better?" It is "when do you want to pay the tax?" The answer depends on where your income is now versus where you expect it to be when you retire.

The 2026 Contribution Rules

The contribution limits for 2026 apply to both account types, and the most important thing to understand is that the limit is shared. The combined annual contribution limit across all of your IRAs (Traditional and Roth combined) is $7,500 if you are under age 50, and $8,600 if you are 50 or older, thanks to a $1,100 catch-up provision for individuals over 50 for 2026. You can split contributions between a Traditional and a Roth in any combination you like, but the total cannot exceed that cap. To be clear, you cannot put $7,500 in a Traditional and $7,500 in a Roth in the same year.

Now here is where the Traditional IRA gets more complicated for high earners. Anyone with earned income can contribute to a Traditional IRA. There is no income ceiling just to put money in, but whether you can actually deduct that contribution on your taxes depends on whether you or your spouse have access to a workplace retirement plan. If neither of you is covered by a 401k or similar plan at work, you can deduct the full Traditional IRA contribution regardless of income. If you are covered by a workplace plan, the deduction phases out at specific income ranges. For 2026, single filers see the deduction phase out between $81,000 and $91,000 in modified adjusted gross income and for married couples filing jointly where the contributing spouse is covered, it phases out between $129,000 and $149,000. Above those thresholds, the contribution is still allowed, but you do not get the deduction. If you contribute to your IRA and your income is too high to take the tax deduction, at this point you have made what is called a non-deductible contribution to your Traditional IRA.

The Roth IRA has income limits of a different kind. For 2026, single filers phase out of direct Roth IRA eligibility between $153,000 and $168,000 in modified adjusted gross income. For married couples filing jointly, the phase-out is between $242,000 and $252,000. Above those numbers, direct Roth contributions are off the table. There is a legal workaround for high earners, and we will cover it below.

How Each Account Treats Your Money While It Grows

Both accounts share one important feature: tax-advantaged growth while your money is invested. You do not owe taxes on dividends, interest, or capital gains every year the way you would in a regular taxable brokerage account. That compounding without annual tax drag is a real benefit of both account types.

There is also a liquidity advantage to the Roth worth knowing. Even before retirement, the contributions you have made to a Roth IRA (not the earnings, just the contributions) can be withdrawn at any time, at any age, without taxes or penalties. You already paid tax on that money when it went in, so the IRS has no further claim on it. Traditional IRA money, by contrast, triggers taxes and a 10% penalty before age 59.5. The Roth's contribution flexibility is one of the most underused features in retirement planning.

Required Minimum Distributions: The Retirement Tax Trap Most People Do Not See Coming

One of the most consequential differences between these two accounts does not show up until your 70s. It is called the Required Minimum Distribution, or RMD, and it applies to Traditional IRAs but not to Roth IRAs.

Starting at age 73 or 75 (if born after 1960), the IRS requires you to withdraw a minimum amount from your Traditional IRA every year, based on your account balance and your life expectancy according to IRS actuarial tables. Miss the withdrawal, and the penalty is severe. These are not optional distributions, they are mandated by law, and they generate taxable income whether you need the money or not.

Here is what this can look like in practice:

Consider a hypothetical couple, call them Richard and Helen, both 74, retired comfortably, with a Traditional IRA balance of $1.4 million. Their Social Security covers their basic expenses and they genuinely do not need to draw heavily from the IRA, but the IRS does not care. Based on their balance and life expectancy factor, they are required to withdraw roughly $59,000 this year. That $59,000 gets added to their Social Security income, and suddenly they are in a meaningfully higher tax bracket. Worse, the larger reported income triggers higher Medicare premiums through IRMAA the income-related monthly adjustment amount. A retirement that looked comfortable on paper becomes more expensive in practice, not because they spent too much, but because the tax structure of their savings forced income on them at the wrong time.

A Roth IRA has no lifetime required minimum distributions for the original owner.  You can leave it untouched at 73, at 83, at 93, and the account keeps growing tax-free. For estate planning purposes, that is also a significant advantage: a Roth IRA can pass to heirs with favorable tax treatment.

How to Actually Decide: A Practical Framework

Here is how we break it down for our clients. The decision comes down to a tax timing question.

1. What is your income and tax rate today? 
2. What do you project your taxable income and tax rate will be when you retire?

If you are early in your career, earning less than you expect to earn in 20 years, and you are in a lower tax bracket right now, the Roth IRA is usually the better choice. You pay today's lower rate on the contribution, and you never pay taxes on decades of compounded growth.

If you are in your peak earning years, which describes most of the families we work with, you are probably in one of the higher tax (32%, 35%, or even the 37%) brackets right now. You more than likely do not qualify for the Traditional IRA deduction, but the backdoor Roth IRA could be an option for you. More to come below...

One thing worth keeping in mind: future tax rates are not guaranteed to stay where they are today. Federal debt levels are at historic highs and the direction of tax policy over the next two or three decades is uncertain. Locking in tax-free retirement income with a Roth is also a hedge against the possibility that the tax rate waiting for your Traditional IRA withdrawals turns out to be higher than what you pay today.

For many high earners, the answer is not either/or. It is a mix over time, using Roth conversions during lower-income years to rebalance the tax exposure in their favor.

When the Roth Door Appears Closed: The Backdoor Roth IRA

For high earners above the 2026 Roth income limits, it might look like the Roth IRA is simply unavailable. It is not. There is a legal, IRS-acknowledged strategy called the backdoor Roth IRA and for the right household, it is one of the most powerful moves available.

With the 2026 contribution limit at $7,500 per person, a married couple can each do a backdoor Roth and move $15,000 combined into Roth accounts every year, even at incomes well above the direct contribution limits. Over 20 years at a 7% assumed return, that is a substantial pool of tax-free retirement assets. Over 20 years assuming the maximum contribution of $15,000 per year you would contribute $300,000 to these accounts and would be worth nearly $615,000 over those 20-years and remember that full balance can be withdrawn without any federal taxes due.

One trap to understand: the pro-rata rule. If you have existing pre-tax balances in any Traditional, SEP, or SIMPLE IRA, the IRS treats all your IRA balances as one pool and taxes the conversion proportionally. The fix, in many cases, is to roll those pre-tax IRA balances into your current employer's 401k first, clearing the deck before executing the backdoor strategy. It adds a step, but it unlocks the full benefit. We have done this for clients over the years.

Here is how it works:

• You make a non-deductible contribution to a Traditional IRA
  • No income limit for this type of contribution
  • Make sure you or your CPA completes Tax Form 8606 to capture the non-deductible contribution 
    • No reason to pay tax on this non-deductible contribution (this is a common oversight we have seen from many of the tax returns we have reviewed over the years)
• Then you convert the Traditional IRA dollars to your Roth IRA
  • You have already paid tax on the contributed dollars, so the conversion of just that contribution generates no additional tax. The money is now in a Roth IRA, where it grows tax-free and comes out tax-free in retirement, with no RMDs.
• Invest the funds in your Roth IRA

The Side-by-Side - Here is how the key differences stack up

The IRA is one of the few retirement accounts you will carry for your entire financial life, regardless of who you work for. Getting it set up correctly is worth the effort!

References

• IRS - IRA Contribution Limits 2026: https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-ira-contribution-limits
• IRS - Traditional IRA Deduction Limits 2026: https://www.irs.gov/retirement-plans/ira-deduction-limits
• IRS - Roth IRA Contribution Limits and Phase-Outs: https://www.irs.gov/retirement-plans/roth-iras
• IRS - Required Minimum Distributions (RMDs): https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-required-minimum-distributions-rmds
• IRS - Backdoor Roth / Nondeductible IRA Contributions: https://www.irs.gov/retirement-plans/ira-faqs-distributions-withdrawals

About Legacy Financial Designs

Legacy Financial Designs is a fee-only wealth management firm located in The Woodlands, TX, serving clients in Greater Houston, TX, College Station, TX and virtually across the United States. We provide comprehensive financial guidance and wealth management to families across the country. If you are interested in working with us, click here to schedule an introductory phone call or feel free to call us anytime at 832-510-0175. 

This content is for educational purposes only and does not constitute personalized financial or tax advice. Please consult a qualified professional regarding your specific situation.

David Wanja, Jr., CFP®