Roth IRA vs. Traditional IRA: Which Is Better for You?
TL;DR
The Roth vs. Traditional IRA decision comes down to one question: will your tax rate be higher now or in retirement? If you're a Millennial early in your career, the odds favor Roth.
In 2026, you can contribute up to $7,500 to an IRA ($8,600 if you're 50 or older). That limit is shared across Roth and Traditional. You can split it between them, but you can't exceed the cap in total [1].
Roth contributions go in after tax and come out tax-free. Traditional contributions may be tax-deductible now, but you pay income tax on every dollar you withdraw in retirement.
The math depends on your current marginal tax rate vs. your future effective tax rate. I'll show you the exact numbers.
If you're unsure, using both accounts gives you tax diversification, which is the most underrated advantage in retirement planning.
Your coworker says Roth. Your parents say Traditional. Reddit has 4,000 comments and zero consensus. And most comparison articles give you a table of features without telling you what to actually do.
If you're sitting here thinking "I just want to make sure I'm doing this right," that's the most common thing I hear. Over 70% of the people who walk into my office have never worked with a financial advisor before, and the Roth vs. Traditional question is one of the first places they get stuck. Not because it's complicated, but because getting it wrong feels expensive.
Here's my opinion: for the majority of Millennials who are currently in the 12% or 22% federal tax bracket and still decades away from retirement, the Roth IRA is the stronger default. That's not always true, and I'll walk through when the Traditional IRA wins. But the Roth has structural advantages that most people underweight.
Let me show you why.
How Each Account Actually Works
Both Roth and Traditional IRAs let your investments grow without being taxed along the way. The difference is when you pay Uncle Sam.
Traditional IRA: You contribute pre-tax dollars (if you qualify for the deduction). Your money grows tax-deferred. When you withdraw in retirement, you pay ordinary income tax on every dollar that comes out [2]. The IRS also requires you to start taking Required Minimum Distributions (RMDs) at age 73, whether you need the money or not [3].
Roth IRA: You contribute after-tax dollars. No deduction today. Your money grows tax-free. When you withdraw in retirement (assuming you've had the account for at least five years and are 59½ or older), you pay zero tax on the growth [4]. No RMDs during your lifetime.
Same contribution limit for both: $7,500 in 2026, or $8,600 if you're 50 or older [1]. And that limit is shared. If you put $5,000 in a Roth, you can only put $2,500 in a Traditional.
The One Question That Matters
Every Roth vs. Traditional comparison boils down to this: Will your tax rate be higher now or in retirement?
If your tax rate is higher now, the Traditional IRA wins because the deduction saves you money at today's higher rate, and you withdraw later at a lower rate.
If your tax rate is lower now (or the same), the Roth IRA wins because you're locking in today's lower rate and letting everything grow tax-free.
Simple, right? In theory. The problem is that nobody knows what tax rates will look like in 25 or 30 years. You're placing a bet on future tax policy every time you make this choice.
The Math: A Real Scenario
Let's make this concrete. Meet our hypothetical 35-year-old, single, earning $85,000 per year. Standard deduction in 2026 is $16,100, putting their taxable income at $68,900 [5]. That lands them in the 22% federal marginal bracket [6].
They contribute $7,500 per year to an IRA. We'll assume a 10% nominal return and 3% inflation. Using the Fisher equation for real (inflation-adjusted) returns: ((1.10) / (1.03)) - 1 = 6.8% real return. All the numbers below are in today's purchasing power.
Assumptions: $7,500 annual contribution, 6.8% real annual return (Fisher equation: 10% nominal, 3% inflation), 30-year time horizon, compounded annually, all values in today's dollars. Past performance does not guarantee future results.
Roth IRA Path: $7,500 after-tax goes in each year. After 30 years at 6.8% real: approximately $685,000. Tax owed on withdrawal: $0. Net spendable in retirement: $685,000.
Traditional IRA Path: $7,500 pre-tax goes in each year. Same $685,000 after 30 years. But every dollar is taxable on the way out. If your effective federal tax rate in retirement is 15%, you'd owe roughly $102,750 in taxes. Net spendable: $582,250.
"But wait," the Traditional IRA defender says. "You got a tax deduction every year. What if you invested that tax savings?"
Fair point. The annual tax savings from the Traditional IRA deduction is $7,500 × 22% = $1,650 per year. If you invested that $1,650 in a taxable brokerage account at the same 6.8% real return, after 30 years you'd have roughly $150,800 before taxes. After paying 15% long-term capital gains tax on the $101,300 in gains, the taxable account nets you about $135,600.
Traditional IRA total (net of taxes): $582,250 + $135,600 = $717,850. Roth IRA total: $685,000.
So the Traditional IRA wins by about $33,000 in this specific scenario. But here's the catch: that outcome depends entirely on your retirement tax rate actually being 15%. If your effective rate in retirement is 22% (same as your contribution years), the Traditional IRA's advantage disappears completely. If rates go up even modestly, the Roth wins. The problem is, in all my years of doing this, I have never seen anyone actually invest the amount they saved in taxes. Ever.
Why the Roth Tends to Win for Millennials
I said the Roth is the stronger default for most Millennials. Here's why.
You're probably in a relatively low bracket right now. If you're earning $50,000 to $100,000, you're in the 12% or 22% bracket [6]. Historically, those are low rates. The current rate structure was made permanent under the 2025 legislation, but "permanent" in tax law has a shelf life [7]. Congress can change rates whenever it wants. Locking in today's rates through a Roth contribution is a hedge against that uncertainty.
Your income will likely grow. Career trajectory for most professionals means higher earnings in your 40s and 50s. That pushes you into higher brackets where the Roth deduction becomes more valuable, but also means future Traditional IRA deductions may be phased out entirely if you have a workplace plan [8]. In 2026, the Traditional IRA deduction starts phasing out at $81,000 for single filers covered by a workplace plan and disappears entirely above $91,000 [1].
No Required Minimum Distributions. Traditional IRAs force you to withdraw starting at age 73, whether you need the money or not [3]. Those forced withdrawals are taxable income that can push you into higher brackets, increase Medicare premiums (through IRMAA surcharges), and potentially make more of your Social Security benefits taxable [9]. Roth IRAs have no RMDs during your lifetime, giving you complete control over your tax situation in retirement.
Tax diversification is valuable on its own. Having both pre-tax (Traditional/401k) and post-tax (Roth) money in retirement gives you flexibility to manage your taxable income year by year. Big medical expense? Draw from the Traditional to capture the deduction. Low-income year? Draw from the Roth to stay in a low bracket. This optionality has real value that's hard to quantify but shows up when you actually need it [10].
When the Traditional IRA Wins
I'm not saying the Traditional IRA is always wrong. Here's when it makes sense.
You're in a genuinely high bracket now and expect a lower one in retirement. If you're earning $200,000+ and plan to retire on significantly less, the tax arbitrage from a Traditional contribution (or Traditional 401k) is meaningful. A deduction at 32% now and withdrawal at 12% later is a real savings.
You don't have a workplace retirement plan. If you (and your spouse, if married) aren't covered by a 401(k), 403(b), or similar plan, the Traditional IRA deduction is available at any income level [8]. No phase-out applies.
You're maxing out your 401(k) already. If you're already contributing $24,500 to a pre-tax 401(k) in 2026 [11], your Roth IRA becomes the only after-tax shelter available to you. In this case, you probably want the Roth IRA for tax diversification regardless.
The Income Limits You Need to Know (2026)
Roth IRA contributions have income phase-outs. If your modified adjusted gross income (MAGI) exceeds these thresholds, your contribution gets reduced or eliminated [1]:
Single filers: Full contribution below $153,000. Partial contribution between $153,000 and $168,000. No direct Roth contribution above $168,000.
Married filing jointly: Full contribution below $242,000. Partial between $242,000 and $252,000. No direct contribution above $252,000.
If you're above those limits, the Backdoor Roth IRA strategy (contribute to a non-deductible Traditional IRA, then convert to Roth) may still be available. That's worth a separate conversation and probably worth discussing with a tax professional, because the pro-rata rule can complicate things if you have existing pre-tax IRA balances [12].
Traditional IRA contributions have no income limits. Anyone with earned income can contribute. But the tax deduction phases out if you're covered by a workplace plan, starting at $81,000 for single filers and $129,000 for married filing jointly in 2026 [1].
What to Actually Do
Step 1: Check your tax bracket. Look at your most recent tax return. Find your marginal federal rate. If you're in the 10% or 12% bracket, Roth is the right call for most people. If you're in the 22% bracket, Roth is probably still the better default unless you have a strong reason to believe your retirement rate will be lower. If you're in the 24% bracket or above, the Traditional/Roth mix becomes more nuanced.
Step 2: Check the income limits. If your MAGI is above $168,000 (single) or $252,000 (married filing jointly), you can't contribute directly to a Roth IRA. Explore the Backdoor Roth with a tax professional [12].
Step 3: Consider what you already have. If your 401(k) is all pre-tax, your IRA should probably be Roth to build tax diversification. If you already have substantial Roth assets, some Traditional contributions might balance things out.
Step 4: Open the account and fund it. Schwab, Fidelity, and Vanguard all offer $0-minimum IRA accounts with access to low-cost index funds like VTI (Vanguard Total Stock Market ETF) [13][14][15]. The most common mistake is spending so long deciding between Roth and Traditional that you don't contribute at all. Any IRA beats no IRA.
Step 5: Don't overthink it. You can change your approach next year. You can split between Roth and Traditional. You can convert Traditional to Roth later. The decision matters, but not as much as the act of consistently putting money away.
If you're a Millennial in the 22% bracket and not sure what to do, open a Roth IRA this week. Future you will be glad the tax bill is already settled.
FAQ
Can I contribute to both a Roth IRA and a Traditional IRA in the same year?
Yes. The $7,500 limit ($8,600 if 50+) is shared across all your IRAs combined [1]. You can split the contribution however you want. For example, $5,000 to a Roth and $2,500 to a Traditional is perfectly fine.
What if I contribute to a Roth IRA and then my income ends up being too high?
You have options. You can recharacterize the contribution as a Traditional IRA contribution before your tax filing deadline. Or you can withdraw the excess contribution (plus any earnings) before filing. The IRS doesn't penalize you as long as you correct it before the deadline [16].
Is a Roth 401(k) the same thing as a Roth IRA?
No. A Roth 401(k) is offered through your employer and has a much higher contribution limit ($24,500 in 2026) [11]. A Roth IRA is an individual account you open yourself with a $7,500 limit. They share the same tax treatment (after-tax in, tax-free out), but different rules apply to each.
Should I do a Roth conversion if I have an old Traditional IRA?
It depends on your current tax situation. Converting means paying income tax on the converted amount in the year you convert [17]. If you're in a low bracket now (maybe you changed jobs, took time off, or had a low-income year), a conversion can make sense. If you're at your peak earning years, converting at a high bracket defeats the purpose. A tax professional can help you model the numbers.
What happens if Congress changes the tax rules on Roth IRAs?
Anything is possible, and this is a common concern. But retroactively taxing Roth withdrawals would affect roughly 70 million account holders [18]. The political cost of changing the deal on that many voters makes it unlikely, though not impossible. This uncertainty is actually another argument for tax diversification: having both pre-tax and after-tax money means no single policy change wrecks your plan.
References
[1] "401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500." Internal Revenue Service, November 13, 2025. https://www.irs.gov/newsroom/401k-limit-increases-to-24500-for-2026-ira-limit-increases-to-7500
[2] "Traditional and Roth IRAs." Internal Revenue Service. https://www.irs.gov/retirement-plans/traditional-and-roth-iras
[3] "Retirement Topics: Required Minimum Distributions (RMDs)." Internal Revenue Service. https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-required-minimum-distributions-rmds
[4] "Roth IRAs." Internal Revenue Service. https://www.irs.gov/retirement-plans/roth-iras
[5] "IRS releases tax inflation adjustments for tax year 2026, including amendments from the One, Big, Beautiful Bill." Internal Revenue Service. https://www.irs.gov/newsroom/irs-releases-tax-inflation-adjustments-for-tax-year-2026-including-amendments-from-the-one-big-beautiful-bill
[6] "2026 Tax Brackets and Federal Income Tax Rates." Tax Foundation. https://taxfoundation.org/data/all/federal/2026-tax-brackets/
[7] "One Big Beautiful Bill Act." U.S. Congress, 2025.
[8] "Publication 590-A: Contributions to Individual Retirement Arrangements (IRAs)." Internal Revenue Service, 2025. https://www.irs.gov/publications/p590a
[9] "Medicare Premiums: Rules for Higher-Income Beneficiaries." Social Security Administration. https://www.ssa.gov/benefits/medicare/medicare-premiums.html
[10] "Tax Diversification in Retirement." Schwab. https://www.schwab.com/learn/story/roth-vs-traditional-ira-which-is-right-you
[11] "Retirement Topics: 401(k) and Profit-Sharing Plan Contribution Limits." Internal Revenue Service. https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-401k-and-profit-sharing-plan-contribution-limits
[12] "Backdoor Roth IRA: What It Is and How to Set One Up." Fidelity. https://www.fidelity.com/learning-center/personal-finance/backdoor-roth-ira
[13] "Open a Schwab Account." Charles Schwab. https://www.schwab.com/open-an-account
[14] "Open a Fidelity Account." Fidelity Investments. https://www.fidelity.com/open-account/overview
[15] "Open a Vanguard Account." Vanguard. https://investor.vanguard.com/accounts-plans
[16] "IRA Contribution Limits." Internal Revenue Service. https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-ira-contribution-limits
[17] "Publication 590-B: Distributions from Individual Retirement Arrangements (IRAs)." Internal Revenue Service. https://www.irs.gov/publications/p590b
[18] "Roth IRA Income and Contribution Limits for 2026." Vanguard. https://investor.vanguard.com/investor-resources-education/iras/roth-ira-income-limits
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About The Author
Shaun Melby, CFP® provides fee-only financial planning and investment management services in Nashville, TN through his company Melby Wealth Management. Shaun has over 15 years of experience as a financial advisor in Nashville. Shaun created Melby Money to educate the public about finances.
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