Short answer
Same Roth idea, different container.
A Roth IRA and a Roth 401(k) both involve after-tax Roth money, but they do not work the same way. A Roth IRA has IRA contribution and income eligibility rules. A Roth 401(k) is a workplace designated Roth account inside an employer plan, with plan rules and workplace contribution limits.
Start here
What you actually came to find out
Plain answers first. Sources stay below for checking details.
What is it?
A comparison between an individual Roth account and a workplace Roth account.
What does it mean for my money?
It can change contribution room, employer-plan access, tax flexibility, and withdrawal planning.
What changes over time?
The better container can change as income, employer plan access, retirement date, and rollover plans change.
What belongs in the plan?
Income eligibility, plan availability, annual limits, match rules, withdrawal timing, and Roth withdrawal records.
Roth IRA
Individual
IRS Roth IRA guidance explains the IRA-side rules.
Source trail: IRS: Roth IRAs
Roth 401(k)
Workplace
IRS designated Roth guidance explains the workplace-plan version.
Source trail: IRS: Designated Roth Accounts
Contribution limits
2026
IRS 2026 retirement limit guidance separates IRA and plan limits.
Source trail: IRS: 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500
Withdrawals
Records
Publication 590-B helps explain Roth distribution treatment.
Source trail: IRS: Publication 590-B: Distributions from Individual Retirement Arrangements
The useful comparison is not which Roth is better. It is which container can accept money and which one gives the household the right access later.
Neutral landscape
The shape of the question
IRS Roth IRA and designated Roth sources separate the two containers.
Source trail: IRS: Roth IRAs, IRS: Publication 590-A: Contributions to Individual Retirement Arrangements, IRS: Publication 590-B: Distributions from Individual Retirement Arrangements, IRS: Designated Roth Accounts, IRS: 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500, CFPB
IRS limit and distribution sources explain why the contribution and withdrawal answers are not identical.
Source trail: IRS: Roth IRAs, IRS: Publication 590-A: Contributions to Individual Retirement Arrangements, IRS: Publication 590-B: Distributions from Individual Retirement Arrangements, IRS: Designated Roth Accounts, IRS: 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500, CFPB
Curator core
What the authorities say
These sources are here for the reader who wants to check the work. The plain-English answer stays above them.
Source 01
IRS
Roth IRAs
The IRS Roth IRA page explains contribution eligibility, qualified distributions, and the Roth tax structure.
Source framing
IRS frames Roth IRAs around after-tax contributions and qualified tax-free distributions.
Strongest for: official Roth IRA rules
Read at IRSSource 02
IRS
Publication 590-A: Contributions to Individual Retirement Arrangements
Publication 590-A is the IRS source for IRA contribution rules, nondeductible contributions, and reporting.
Source framing
IRS Publication 590-A covers traditional and Roth IRA contribution mechanics.
Strongest for: IRA contribution details and nondeductible IRA context
Read at IRSSource 03
IRS
Publication 590-B: Distributions from Individual Retirement Arrangements
Publication 590-B is the IRS source for IRA distributions, Roth ordering rules, and required minimum distributions.
Source framing
IRS Publication 590-B explains distribution rules that matter after money leaves an IRA.
Strongest for: RMDs, Roth distribution rules, and IRA withdrawals
Read at IRSSource 04
IRS
Designated Roth Accounts
IRS designated Roth guidance helps distinguish Roth workplace money from pre-tax and after-tax plan contributions.
Source framing
IRS separates designated Roth contributions from other workplace-plan contribution types.
Strongest for: Roth and after-tax workplace account distinctions
Read at IRSSource 05
IRS
401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500
The IRS release gives 2026 401(k), IRA, catch-up, Roth IRA income phase-out, and related retirement-plan limits.
Source framing
IRS publishes the 2026 retirement contribution limits and Roth IRA income phase-out ranges.
Strongest for: 2026 retirement account contribution and Roth income limits
Read at IRSSource 06
CFPB
Planning for Retirement
CFPB retirement resources help consumers compare retirement timing, Social Security, and income choices.
Source framing
CFPB frames retirement decisions as consumer choices that can be compared before action.
Strongest for: neutral consumer planning context
Read at CFPBPlain-English forks
The forks people face
Most retirement questions hide a few smaller decisions. These are the practical pieces that change the plan.
Does the worker have a Roth 401(k) option at work?
Why it matters: This is the first fork because it changes the plan math.
In real life: This can make the same claiming age feel different for someone still earning a paycheck.
What to look at: What to look at: the account, rule, or household number that controls this step.
Is income too high for direct Roth IRA contributions?
Why it matters: This fork changes taxes, timing, or risk.
In real life: This changes the gap between money in an account and money you can actually spend.
What to look at: What to look at: the next page or calculator tied to the same question.
Is the goal more contribution room or more account control?
Why it matters: This fork decides whether the idea is useful now or only later.
In real life: This turns today's bills into the yearly target the retirement map has to carry.
What to look at: What to look at: age, income, spending, health cost, and account timing.
Will the Roth money be rolled over or used directly in retirement?
Why it matters: This fork keeps the answer from becoming generic.
In real life: This changes the gap between money in an account and money you can actually spend.
What to look at: What to look at: the household map, not just the account label.
Common questions
Quick answers
Short, plain answers for the questions people usually have next. The source trail stays available below.
What is the plain answer on Roth IRA vs Roth 401(k)?+
A Roth IRA is an individual account. A Roth 401(k) is a workplace designated Roth account. Both use Roth tax treatment, but contribution limits, access, income rules, and plan rules differ.
Is this financial advice?+
No. This is source-backed education. The page explains the rule, the tradeoff, and the next number to check.
Where does the calculator fit?+
Use the calculator when the question needs a rough number. Use the map when the number needs to sit beside income, taxes, health costs, housing, and timing.
How this page is curated
This page uses IRS Roth IRA guidance, designated Roth account guidance, Publication 590-A, Publication 590-B, and IRS 2026 retirement limit guidance. It compares containers, not products.
Read the planner methodologyTrust anchor
Sources used on this page
Every source named above is listed here in one place.
CFPB. Planning for Retirement
https://www.consumerfinance.gov/consumer-tools/retirement/IRS. Roth IRAs
https://www.irs.gov/retirement-plans/roth-irasIRS. Publication 590-A: Contributions to Individual Retirement Arrangements
https://www.irs.gov/publications/p590aIRS. Publication 590-B: Distributions from Individual Retirement Arrangements
https://www.irs.gov/publications/p590bIRS. Designated Roth Accounts
https://www.irs.gov/retirement-plans/designated-roth-accountsIRS. 401(k) limit increases to $24,500 for 2026, IRA limit increases to $7,500
https://www.irs.gov/newsroom/401k-limit-increases-to-24500-for-2026-ira-limit-increases-to-7500
Before you act on this
This plan is educational. It is not personalized financial, tax, or insurance advice. Projections illustrate the math, they do not predict the future. Talk to your own licensed financial professional before acting on any of it.