The Core Difference
An IRA - Individual Retirement Account - is a personal retirement savings account you open yourself, separate from any employer. Both the Roth and Traditional versions give you the same core benefit: your investments grow without being taxed each year. The difference is the timing of the tax.
Traditional IRA
You contribute pre-tax money (contributions may be deductible). The money grows tax-deferred. You pay ordinary income tax when you take money out in retirement. Better when you expect a lower tax rate in retirement than you have today.
Roth IRA
You contribute after-tax money (no upfront deduction). The money grows tax-free. Qualified withdrawals in retirement are completely tax-free - including all the growth. Better when you expect a higher tax rate in retirement than you have today.
Put simply: Traditional IRA gives you a tax break today. Roth IRA gives you a tax break in retirement. The question is - which is worth more to you?
If your tax rate is the same now as it will be in retirement, both accounts give you identical results. The Roth wins if your future tax rate is higher. The Traditional wins if your future tax rate is lower. Since nobody knows exactly what future tax rates will be, many people contribute to both - hedging the uncertainty.
2025 Contribution Limits and Income Rules
| Rule | Traditional IRA | Roth IRA |
|---|---|---|
| Annual contribution limit (under 50) | $7,000 | $7,000 |
| Catch-up (age 50+) | $8,000 | $8,000 |
| Income limit to contribute | None | Yes (phases out) |
| Income limit for deduction | Yes (if covered by workplace plan) | N/A |
| Tax on contributions | Pre-tax (may be deductible) | After-tax (no deduction) |
| Tax on withdrawals | Ordinary income tax | Tax-free (qualified) |
| Required Minimum Distributions | Yes, from age 73 | None during lifetime |
| Early withdrawal of contributions | Tax + 10% penalty | Contributions only: tax-free anytime |
Roth IRA Income Limits for 2025
The Roth IRA has income limits - above a certain income level, you can't contribute directly. For 2025:
- Single filers: full contribution allowed up to $150,000 MAGI. Phases out between $150,000 and $165,000. No direct contribution above $165,000
- Married filing jointly: full contribution up to $236,000. Phases out between $236,000 and $246,000. No direct contribution above $246,000
If your income is above these limits, there's still a legal route called the backdoor Roth IRA - you contribute to a non-deductible Traditional IRA and then convert it to a Roth. This is a well-established strategy but has some complexity worth understanding before using it.
Traditional IRA Deduction Rules
Anyone with earned income can contribute to a Traditional IRA, but whether the contribution is tax-deductible depends on two things: whether you (or your spouse) are covered by a workplace retirement plan, and your income.
- No workplace plan: contributions are fully deductible regardless of income
- Covered by a workplace plan, single: full deduction up to $79,000 MAGI in 2025, phases out up to $89,000
- Covered by a workplace plan, married filing jointly: full deduction up to $126,000 MAGI, phases out up to $146,000
If you can't deduct a Traditional IRA contribution because of income, a non-deductible Traditional IRA contribution (or simply a Roth IRA if you're within the income limit) is usually the better choice.
Which One Should You Choose?
There's no single right answer for everyone, but here's a practical framework:
- Early in your career, lower income now: Roth. You're probably in a lower tax bracket now than you'll be at peak earnings. Pay tax now at the lower rate, withdraw tax-free later
- Peak earning years, high income now: Traditional. The upfront deduction reduces taxable income when it matters most. You'll likely be in a lower bracket in retirement
- Expect tax rates to rise in future: Roth. If you believe Congress will raise tax rates, locking in today's rates with a Roth makes sense
- Want flexibility: Roth. You can withdraw contributions (not earnings) at any time without tax or penalty - useful as a backup emergency fund
- Want to avoid RMDs: Roth. No required minimum distributions during your lifetime means more control over when and how you take income
Many people contribute to both a Roth and Traditional IRA (or Roth and Traditional 401k) in the same year. This gives you taxable income in retirement from both pre-tax and after-tax sources, which can be useful for tax planning. You can draw down whichever account minimises your tax bill in any given retirement year depending on your income that year.
Where the Roth Particularly Wins
The Roth IRA has a few advantages that go beyond the tax-free growth:
- No RMDs: Unlike a Traditional IRA or 401(k), you never have to take money out of a Roth IRA during your lifetime. This is useful if you don't need the money at 73 and want to let it keep growing or pass it to heirs
- Contribution withdrawal flexibility: You can take out the money you contributed (not the earnings) at any time without tax or penalty. This makes a Roth IRA useful as a secondary emergency fund for money you likely won't need
- Tax-free inheritance: Beneficiaries who inherit a Roth IRA don't pay income tax on withdrawals (though they still must take the money within 10 years under current rules)
- No impact on Social Security taxation: Roth IRA withdrawals don't count as income for the purpose of calculating how much of your Social Security benefit is taxable
Where to Open an IRA
You can open an IRA at most major brokerages. The main things to compare are investment options, account fees, and minimum deposit requirements. Widely used options include Fidelity, Vanguard, Schwab, and online brokers like M1 Finance. Most of these charge no account fee and have no minimum to open an IRA.
Once the account is open, the investment choice is the same as any brokerage account - but for most people, a low-cost target-date fund or a simple three-fund portfolio (US stocks, international stocks, bonds) is all that's needed.
Both Traditional and Roth IRAs require you to have earned income (wages, salary, self-employment income) at least equal to your contribution. Investment income, rental income, and Social Security do not count as earned income for this purpose. If you earn $4,000 in a year, you can contribute at most $4,000 to your IRA. Spousal IRA rules allow a non-working spouse to contribute based on the working spouse's income.