The Core Difference: When You Pay Tax
Both a Traditional IRA and a Roth IRA are individual retirement accounts - tax-advantaged savings vehicles you open independently, outside of any employer plan. The fundamental distinction between them is not how much you can save, but when the IRS collects its share.
With a Traditional IRA, contributions may be tax-deductible in the year you make them (subject to income and workplace plan rules). Your money grows tax-deferred, meaning you pay no tax on gains year to year. When you withdraw funds in retirement, those withdrawals are taxed as ordinary income.
With a Roth IRA, there is no upfront deduction - you contribute money you've already paid income tax on. In return, your investments grow tax-free, and qualified withdrawals in retirement (generally after age 59½ and a five-year holding period) are completely free of federal income tax.
To understand how account type affects your overall tax picture, see our overview of tax-advantaged accounts vs. standard investment accounts.
| Criterion | Traditional IRA | Roth IRA |
|---|---|---|
| Tax treatment of contributions | Potentially tax-deductible | After-tax (no deduction) |
| Tax treatment of growth | Tax-deferred | Tax-free |
| Tax treatment of withdrawals | Taxed as ordinary income | Tax-free (if qualified) |
| Required minimum distributions | Yes, starting at age 73 | None during owner's lifetime |
| Income limits to contribute | None (deduction may phase out) | Yes, phase-out at higher incomes |
| Early withdrawal of contributions | Taxed + possible 10% penalty | Contributions withdrawable anytime |
| 2024 contribution limit | $7,000 ($8,000 if age 50+) | $7,000 ($8,000 if age 50+) |
Contribution Limits, Income Rules, and Eligibility
The IRS sets a single annual contribution limit that applies to all your IRAs combined - Traditional and Roth together. For 2024, that limit is $7,000 (or $8,000 if you are age 50 or older, thanks to the catch-up contribution allowance). You cannot contribute more than your earned income for the year.
Roth IRA income limits: High earners may be phased out of contributing to a Roth IRA directly. The phase-out range for 2024 begins at $146,000 for single filers and $230,000 for married couples filing jointly. Above those thresholds, your allowed Roth contribution gradually decreases to zero.
Traditional IRA deductibility limits: Anyone with earned income can contribute to a Traditional IRA, but the tax deduction phases out if you (or your spouse) are covered by a workplace retirement plan and your income exceeds certain thresholds. If you can't deduct the contribution, you're making a non-deductible Traditional IRA contribution - which still grows tax-deferred but adds record-keeping complexity.
For a broader look at how IRAs stack up against workplace accounts, our guide on 401(k) vs. IRA walks through both options in detail.
Withdrawals, RMDs, and Long-Term Flexibility
The tax treatment at withdrawal is where these two accounts diverge most sharply in practice.
Traditional IRA withdrawals are taxed as ordinary income, regardless of how the underlying investments performed. The IRS also requires you to begin taking required minimum distributions (RMDs) - mandatory annual withdrawals - starting at age 73 (under current law). Failing to take your RMD on time results in a significant tax penalty.
Roth IRA withdrawals of contributions (the money you put in) can be taken at any time, at any age, without tax or penalty - because you already paid tax on that money. Withdrawals of earnings are tax-free once you meet the qualified distribution rules. Crucially, Roth IRAs have no RMDs during the account owner's lifetime, allowing the account to continue compounding untouched if you don't need the funds.
This flexibility makes the Roth IRA an appealing option for those who want to leave assets to heirs or who are uncertain when they'll actually need to draw on retirement savings. For a deeper dive into how Roth accounts work, see our article on Roth IRA fundamentals.
$7,000
2024 IRA annual contribution limit
The IRS sets this combined limit for Traditional and Roth IRA contributions; those 50 and older may contribute an additional $1,000 catch-up amount.
Age 73
Age RMDs begin for Traditional IRAs
Under the SECURE 2.0 Act, the required minimum distribution start age was raised to 73 for those who turn 72 after December 31, 2022.
5 years
Roth holding period for tax-free earnings
Roth IRA earnings withdrawals are generally tax-free only after the account has been open at least five years and the owner is age 59½ or older.
How to Think About Your Tax Rate - Now vs. Later
The single most important question when choosing between these accounts is: Will you be in a higher tax bracket now, or in retirement?
- If your tax rate is higher now: A Traditional IRA deduction saves you money at today's elevated rate, and you'll pay tax on withdrawals later at a potentially lower rate. This is generally the case for people in peak earning years.
- If your tax rate is lower now: Paying tax today via Roth contributions is relatively cheap. You lock in tax-free withdrawals when your rate might be higher.
- If you genuinely don't know: Contributing to both types (within the combined annual limit) is a valid strategy that hedges against tax-rate uncertainty - sometimes called tax diversification.
It's worth noting that predicting future tax rates involves real uncertainty - both personal income changes and potential shifts in tax law. No one can guarantee what rates will look like decades from now.
For a more detailed comparison of how pre-tax and after-tax retirement contributions play out over time, see our article on Roth vs. traditional pre-tax contributions.
This article is for general informational and educational purposes only and does not constitute personalised financial, tax, or legal advice. Tax rules and contribution limits are subject to change. Please consult a qualified financial adviser or tax professional for guidance specific to your situation.
