Traditional vs Roth IRA — which wins?
The choice between Traditional and Roth IRA comes down to one question: will your marginal tax rate in retirement be higher or lower than it is now? If lower (common for retirees with less income), Traditional wins — take the deduction now at your high rate, pay tax later at your lower rate. If higher (common for young high-earners expecting promotions and pension income), Roth wins.
2025 IRA contribution limits
- Under age 50: $7,000/year
- Age 50+: $8,000/year ($1,000 catch-up)
- Phase-out for Roth contributions: starts at $150,000 (single) / $236,000 (married) MAGI in 2025.
- Traditional IRA deduction phase-out: depends on workplace plan coverage and income.
The "Roth conversion ladder" strategy
For early retirees, converting Traditional IRA funds to Roth in low-income years (before Social Security and RMDs begin) can lock in low tax rates and access funds before age 59½ without penalty. Each year you convert an amount equal to your standard deduction, paying zero federal tax on the conversion.
Even if you can't deduct Traditional IRA contributions (due to income phase-outs), you can still contribute to a Roth IRA via the "backdoor Roth" strategy — contribute after-tax to a Traditional IRA, then immediately convert to Roth. This works as long as you have no other pre-tax Traditional IRA balance.
Frequently asked questions
What is the 2025 IRA contribution limit?
$7,000 for under age 50, $8,000 for age 50+ (catch-up). The limit applies across all your IRAs combined — you can't contribute $7,000 to a Traditional AND $7,000 to a Roth.
What is the backdoor Roth IRA strategy?
For high earners who can't contribute directly to a Roth IRA (income phase-out starts at $150K single / $236K married in 2025), the backdoor works: contribute after-tax to a Traditional IRA, then immediately convert to Roth. Works cleanly only if you have no other pre-tax Traditional IRA balance.
Should I prioritize 401(k) or IRA contributions?
Order: (1) 401(k) up to employer match (free money), (2) HSA if eligible (triple tax advantage), (3) max Roth IRA (more investment options, tax-free growth), (4) back to 401(k) up to annual limit, (5) taxable brokerage. The IRA generally has better investment options and lower fees.
What is a Roth conversion ladder?
Strategy for early retirees to access Traditional IRA funds before age 59½ without penalty. Each year, convert an amount equal to your standard deduction to Roth. Pay no federal tax on the conversion. After 5 years, withdraw the converted amount tax- and penalty-free.
Can I contribute to both 401(k) and IRA?
Yes, simultaneously. The contribution limits are separate. However, if you (or your spouse) have a workplace retirement plan, Traditional IRA deductions phase out at certain income levels. Roth IRA contributions also phase out at high incomes.
What happens if I over-contribute to my IRA?
You'll owe a 6% excise tax on the excess each year until you withdraw it. Withdraw the excess (plus any earnings on it) before your tax filing deadline (including extensions) to avoid the penalty. Most brokers will reverse the contribution if you catch it in time.
What is the difference between Roth IRA and Roth 401(k)?
Roth IRA: $7,000 annual limit (2025), income phase-outs, total control over investments, no RMDs. Roth 401(k): $23,500 annual limit, no income limits, limited to plan investment options, RMDs required (though SECURE 2.0 eliminates these starting 2024).
Glossary of key terms
- Traditional IRA
- Pre-tax contributions (deductible if under income limits), taxed on withdrawal in retirement.
- Roth IRA
- After-tax contributions, tax-free withdrawals in retirement. Income limits apply.
- Backdoor Roth
- Strategy for high earners: contribute to Traditional IRA, convert to Roth. Bypasses income limits.
- Roth Conversion
- Moving funds from Traditional IRA to Roth IRA. Taxes due on converted amount.
- RMD (Required Minimum Distribution)
- Mandatory withdrawals from Traditional IRAs starting at age 73 (75 starting 2033). Roth IRAs have no RMDs.
Common mistakes to avoid
- Not contributing to an IRA because you have a 401(k) — IRAs offer different tax treatment and more investment options
- Missing the backdoor Roth strategy if you're a high earner — leaves tax-free growth on the table
- Withdrawing earnings from a Roth IRA before age 59½ — taxes + 10% penalty
- Not having a Roth component — provides tax diversification in retirement
- Over-contributing and not catching it — 6% excise tax per year on excess
Pro tips
- Funding order: 401(k) match → HSA → Roth IRA → 401(k) max → taxable brokerage.
- If income too high for direct Roth, use backdoor: contribute to Traditional, convert to Roth immediately.
- Tax-loss harvest in taxable accounts — offset up to $3,000 ordinary income plus unlimited gains.
- Early retirees: use Roth conversion ladder to access Traditional funds penalty-free before 59½.
- Tax diversify — have funds in Traditional, Roth, AND taxable accounts for flexibility in retirement.
Results are estimates for educational purposes only and not financial advice. Consult a licensed professional for advice specific to your situation.