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Roth IRA or traditional IRA: which one should you choose?
by financebrain · October 20, 2026
The difference is when you pay tax:
- Traditional IRA: contributions may be tax-deductible now, the money grows without yearly tax, and withdrawals in retirement are taxed as income.
- Roth IRA: contributions come from money you've already paid tax on, with no deduction. Qualified withdrawals in retirement, including all the investment growth, are completely tax-free.
The usual way to choose is to compare your tax rate now with the rate you expect in retirement. If you expect it to be higher later, the Roth tends to come out ahead, because you pay tax at today's lower rate. If you expect it to be lower later, the traditional IRA's deduction now tends to be worth more.
A simple way to see it
Say you have $1,000 of pre-tax pay to save and your tax rate is 22%, both now and in retirement (a hypothetical case).
- Traditional: you put in the full $1,000 and deduct it. Suppose it doubles to $2,000. You pay 22% tax on withdrawal and keep $1,560.
- Roth: you pay 22% tax first, so you put in $780. It doubles to $1,560, and you withdraw it tax-free. You keep $1,560.
At the same tax rate, the two come out equal. The decision really is about the difference between your rate now and your rate later. That's why people early in their careers, often on lower incomes, are commonly pointed toward the Roth.
Other differences that matter
| Traditional IRA | Roth IRA | |
|---|---|---|
| Tax break | Possibly a deduction now | Tax-free qualified withdrawals |
| Who can contribute | Anyone with earned income | Income limits apply |
| Deduction limits | Phases out at higher incomes if you (or your spouse) have a workplace plan | No deduction to limit |
| Required withdrawals in your lifetime | Yes | No |
| Taking out your contributions early | Generally taxed, and may be penalized | Contributions (not earnings) can come out any time, tax- and penalty-free |
A few of these need a little more explanation:
- Qualified Roth withdrawals. Earnings come out tax-free once the account has been open at least five years and you're at least 59½. The five-year clock starts on January 1 of the tax year of your first Roth contribution.
- Income limits. Above a certain income you can't contribute to a Roth IRA directly. Higher earners sometimes use the "backdoor Roth": a non-deductible traditional IRA contribution, then a conversion to Roth. It has a trap called the pro-rata rule if you already hold pre-tax IRA money, which the lesson explains.
- No required withdrawals. A Roth can be left untouched for as long as you live, which is useful for flexibility and for passing money on.
Contribution limits and income thresholds for both accounts change most years. Check the IRS's current figures before you contribute.
You don't have to choose only one
Many people hold both kinds of account, or split their savings between traditional and Roth. That spreads the bet across whatever tax rates the future brings. If your employer offers a Roth 401(k), it has no income limit for contributions.
Learn it properly
Finance Brain's IRAs and Backdoor Roth lesson, in the Retirement Accounts and Tax-Advantaged Savings course, covers both accounts in detail. It also walks through the backdoor Roth step by step, with a worked pro-rata example, and explains the SEP and SIMPLE IRAs for the self-employed. It ends with a short quiz.
Finance Brain is educational content, not financial or tax advice. This post describes US rules.