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Roth IRA vs Traditional IRA

Roth IRA vs Traditional IRA: how each is taxed, who each is for, and which gives you more retirement spending power. Free compound interest calculator included.

Updated April 2026 · 7 min read

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The Roth IRA and Traditional IRA are twins that diverge on one crucial question: when do you pay income tax on the money — now, or at retirement? Every other difference (contribution limits, withdrawal rules, required minimum distributions) flows from that one choice. And because compound growth multiplies small tax differences into huge lifetime amounts, getting this right in your twenties or thirties can mean tens of thousands of extra dollars in retirement. The hard part is that the 'right' answer depends on where you think your tax rate will be in 30 years — and on the fact that both accounts have corner-case rules most articles skip.

Option 1

Roth IRA

Pay tax now, grow tax-free, withdraw tax-free in retirement.

Best for

Younger workers in the 12–22% federal bracket who expect to be in a higher bracket at retirement, anyone who wants maximum flexibility on withdrawals, and anyone worried that future tax rates will be higher than today's.

Pros

Every dollar you withdraw in retirement is 100% tax-free, including decades of compound growth.
You can withdraw your contributions (not earnings) at any time, tax- and penalty-free — making it a soft emergency fund.
No required minimum distributions at age 73 — you can leave it growing indefinitely.
Heirs inherit it tax-free (subject to the 10-year rule for non-spouses).
If you expect your tax bracket to rise, you're locking in today's lower rate.

Cons

You pay tax now, which reduces current take-home pay.
Income phase-outs mean high earners can't contribute directly (though a 'backdoor Roth' workaround exists).
Contribution limit is the same as Traditional ($7,000 in 2026, $8,000 if 50+) — you can't contribute to both above that combined limit.
If you end up in a lower tax bracket at retirement than expected, you paid more tax than necessary.

Option 2

Traditional IRA

Deduct contribution now, grow tax-deferred, pay tax on withdrawals in retirement.

Best for

Peak-earning-years workers in the 24–35% bracket expecting a lower bracket in retirement, anyone who needs the immediate tax deduction, and anyone who's already maxed out a Roth or has income above Roth limits.

Pros

Immediate tax deduction lowers this year's taxable income (if you qualify for full deduction).
No income limit for contributions (though deduction phase-outs apply if you have a workplace plan).
Simpler if you're rolling over a 401(k) from a previous job — Traditional IRA is the default destination.
You get to invest the amount you would have paid in tax — more initial capital compounding.
If retirement tax rate is genuinely lower than your current bracket, the math favors Traditional.

Cons

Every dollar withdrawn in retirement is taxed as ordinary income.
Required minimum distributions start at age 73 — the government forces you to take money out.
Heirs pay ordinary income tax on inherited balances.
Less flexible: withdrawing contributions before 59½ triggers both tax and a 10% penalty.

The verdict

For most people under 40 in the 12–22% tax bracket, the Roth wins. The tax-free compounding over 30+ years dominates the 'save on current taxes' argument, and the flexibility on contribution withdrawals is quietly huge. For high earners in their peak years (24%+ bracket, maxing other accounts), the Traditional's immediate deduction plus tax-deferred growth is usually mathematically better. If you genuinely can't predict — which is most people — split the difference: some to Roth, some to Traditional or pre-tax 401(k). Tax diversification at retirement gives you withdrawal flexibility no single account can match.

The backdoor Roth, briefly

If your income is above the Roth contribution limits ($165,000 single, $246,000 married in 2026), you can still get money into a Roth via a 'backdoor': contribute to a non-deductible Traditional IRA, then immediately convert it to Roth. This is legal and common, but the 'pro-rata rule' means existing Traditional IRA balances can generate tax on the conversion. Consult a CPA before doing this if you have significant Traditional balances.

What about the Roth 401(k)?

A Roth 401(k) combines Roth tax treatment with the much higher 401(k) contribution limit ($23,500 in 2026). If your employer offers one, it's usually a strictly better vehicle than the Roth IRA for dollars above the IRA limit. The only thing the IRA does better is investment choice — a 401(k) is restricted to the plan's menu.

Run the numbers yourself

Plug your own inputs into the free tools below — no signup, works in your browser, nothing sent to a server.

Free toolRoth IRA CalculatorEstimate your Roth IRA balance at retirement. Assumes post-tax contributions and tax-free withdrawals in retirement.Open tool →Free toolCompound Interest CalculatorSee how much your money grows with compound interest. Add starting balance, monthly contributions, and watch the curve.Open tool →

Frequently asked questions

Can I contribute to both a Roth and a Traditional IRA?

Yes, but the combined contribution across both can't exceed the annual limit ($7,000 under 50, $8,000 at 50+ for 2026). Many people split contributions to hedge against uncertainty about future tax rates.

What's the income limit for a Roth IRA?

For 2026, direct Roth contributions phase out between $150,000 and $165,000 for single filers, and $236,000 to $246,000 for married filing jointly. Above these, consider the backdoor Roth.

Is a Roth IRA ever worse than a Traditional?

Yes — if your tax rate is genuinely higher now than it will be in retirement, and you invest the entire contribution (not the after-tax equivalent), Traditional wins mathematically. This is usually true for peak-earning-years professionals in the 32%+ bracket.

Can I roll an old 401(k) into a Roth IRA?

Yes, but it's a 'Roth conversion' — you'll owe ordinary income tax on the entire rolled amount in the year of the conversion. Many people do this in low-income years (early retirement, sabbatical, career transition).

What's the 5-year rule?

For Roth earnings (not contributions) to be withdrawn tax-free, the Roth IRA must have been open for at least 5 years AND you must be 59½. This doesn't apply to contributions, which can always be withdrawn tax-free.