Roth 401 K vs Roth IRA
A Roth 401(k) is employer-sponsored with higher contribution limits ($23,000 in 2024, or $30,500 if 50+) but mandatory distributions at 73, while a Roth IRA is individually opened with lower limits ($7,000, or $8,000 if 50+) but no required withdrawals in your lifetime. Both grow tax-free and offer tax-free qualified distributions, but income restrictions, employer matching, investment choice, and withdrawal rules differ sharply.
How do contribution limits compare between Roth 401(k) and Roth IRA?
A Roth 401(k) allows $23,000 in employee deferrals for 2024 ($30,500 if you're 50 or older), while a Roth IRA caps contributions at $7,000 ($8,000 age 50+). This nearly 3:1 difference makes the Roth 401(k) the clear choice for high earners who want to shelter more income from future taxes.
Does income affect eligibility for each account?
Roth 401(k) eligibility has no income cap; a surgeon earning $800,000 can contribute the full $23,000 if her employer offers the plan. Roth IRA contributions phase out between $146,000–$161,000 modified adjusted gross income (MAGI) for single filers and $230,000–$240,000 for married filing jointly in 2024 (IRS Publication 590-A).
What are the key differences in withdrawal rules and required minimum distributions?
Roth IRAs have no required minimum distributions (RMDs) during the owner's lifetime, meaning you can leave the account untouched indefinitely and pass it to heirs. Roth 401(k) accounts are subject to RMDs starting at age 73 under current law (rising to 75 in 2033 per SECURE 2.0).
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How does employer matching work and where does it go?
Employer matching contributions to a Roth 401(k) always go into a traditional (pre-tax) 401(k) account, even though your own deferrals are Roth. If your employer matches 50 cents per dollar up to 6 percent of salary and you contribute $12,000 Roth, you might receive $3,000 in traditional matching funds.
What investment options and control do you have in each account?
Roth 401(k) investment menus are chosen by your employer and plan provider, typically offering 10–30 mutual funds or target-date funds. Fees vary by plan; small-company plans sometimes carry expense ratios above 1 percent, while large-employer plans may offer institutional share classes below 0.10 percent.
Which account should you choose, and can you use both?
You can contribute to both a Roth 401(k) and a Roth IRA in the same year if you meet IRA income limits; the contribution caps are independent. The optimal sequence for most people: contribute enough to the Roth 401(k) (or traditional 401(k)) to capture the full employer match, then max the Roth IRA for its flexibility and no-RMD benefit, then return to the Roth 401(k) to use any remaining contribution room.
| Feature | Roth 401(k) | Roth IRA |
|---|---|---|
| 2024 contribution limit (under 50) | $23,000 | $7,000 |
| Income limit | None | $161,000 single / $240,000 joint (phase-out top) |
| Employer match | Yes (goes to traditional side) | No |
| Investment choice | Plan menu only | Entire market |
| Lifetime RMDs | Yes, at age 73 | No |
| Early contribution withdrawal | Pro-rata in most plans | Anytime, tax/penalty-free |
FAQ
Can I convert my Roth 401(k) to a Roth IRA?
Yes. You can roll a Roth 401(k) into a Roth IRA after separating from your employer or, if your plan allows, through an in-service rollover at 59½.
Do I pay taxes on Roth 401(k) or Roth IRA contributions?
You pay ordinary income tax on contributions to both in the year you earn the money; neither provides an upfront deduction. The benefit is that qualified withdrawals—contributions and earnings—come out completely tax-free in retirement, assuming you meet age and five-year rules.
What happens to a Roth 401(k) if I leave my job?
You can leave it in the old employer's plan (if the balance exceeds $7,000), roll it to your new employer's plan if accepted, roll it to a Roth IRA, or cash it out (subject to taxes and penalties on earnings if you're under 59½ and the account is less than five years old). Rolling to a Roth IRA is usually the best move for control and RMD elimination.
Can I contribute to a Roth 401(k) and a traditional 401(k) in the same year?
Yes, but the combined employee deferrals cannot exceed $23,000 in 2024 ($30,500 if 50+). You might put $15,000 in traditional and $8,000 in Roth, for example.
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Model long-term contributions with the Roth IRA calculator
A Roth IRA account is funded with after-tax money, so contributions do not generally create a federal income-tax deduction. Qualified distributions can receive favorable federal tax treatment when applicable requirements are met. A projection adds planned contributions to the current balance and applies an assumed return. Market performance, fees, contribution timing, and withdrawals can make actual results materially different from the estimate.
Roth IRA contribution limits and income eligibility rules can change, so check current IRS guidance rather than relying on an older limit. When comparing a traditional IRA vs Roth IRA, consider current tax treatment, possible deductions, future distribution rules, and required minimum distribution rules. A Roth IRA vs 401k comparison should also address employer matching, investment choices, fees, creditor protections, and access to money. Complex conversion strategies may create tax consequences.
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