A Roth 401(k) combines an employer-sponsored 401(k) with Roth tax treatment: you contribute after-tax dollars, so qualified withdrawals in retirement, including all your investment growth, come out completely tax-free. Employer matching, contribution limits, and most plan features work like a traditional 401(k); only the taxation differs. Tax-free withdrawals require clearing two hurdles, a minimum age and a minimum holding period, and missing either means only the earnings are taxed.

For 2026, you can contribute up to $24,500 to a Roth 401(k). At 50 or older, an $8,000 catch-up brings the total to $32,500. Between ages 60 and 63, a larger "super catch-up" of $11,250 replaces the standard catch-up, for up to $35,750. Starting this year, anyone who earned more than $150,000 in Social Security wages the prior year must make catch-up contributions on a Roth basis, a rule a Roth 401(k) already satisfies.

When a Roth 401(k) withdrawal is tax-free

To take tax- and penalty-free withdrawals from a Roth 401(k), you must meet two conditions: you must be at least 59 1/2, and your account must have been open for at least five years. Together these define a qualified distribution.

There are exceptions to the penalty. If you leave your job in or after the year you turn 55, the Rule of 55 lets you withdraw from that employer's Roth 401(k) without the 10% early-withdrawal penalty. It applies only to your most recent employer's plan, not to Roth 401(k)s from earlier jobs unless you roll them in first.

If you withdraw before 59 1/2 without an exception, you owe a 10% penalty on the earnings plus income tax on those earnings. Death and disability remove the penalty and the age 59 1/2 requirement, but the five-year holding period still applies: if the account is not yet five years old, the earnings are still taxed even for a beneficiary or a disabled account holder.

Like a Roth IRA, a Roth 401(k) is not subject to required minimum distributions during the owner's lifetime. That has been true since 2024, when SECURE 2.0 eliminated lifetime RMDs for designated Roth accounts in employer plans. Retirees used to roll a Roth 401(k) into a Roth IRA just to escape RMDs; that reason is gone, though a rollover can still make sense for other reasons.

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Taxes on unqualified withdrawals

A withdrawal that does not meet the age and five-year rules is unqualified. You are not taxed on the full amount: your contributions were after-tax and are never taxed again. Only the earnings included in the withdrawal are taxed as ordinary income, plus the 10% penalty if you are under 59 1/2 and no exception applies.

To make both your contributions and earnings fully tax-free, wait until you are at least 59 1/2 with a Roth 401(k) that has been open at least five years.

Rolling a Roth 401(k) into a Roth IRA

Since Roth 401(k)s no longer carry lifetime RMDs, avoiding RMDs is not a reason to roll over. What still matters: a Roth IRA usually offers more investment choices than an employer plan, and consolidating accounts simplifies recordkeeping and beneficiary planning.

One catch: rolling a Roth 401(k) into a Roth IRA starts a fresh five-year clock unless you already had a Roth IRA open for five years or more. You could satisfy the Roth 401(k) holding requirement and still have to wait five more years to withdraw earnings tax-free from the Roth IRA. Plan the timing with a tax or financial advisor.

Borrowing from a Roth 401(k)

Some Roth 401(k) plans allow loans, which avoid taxes and penalties as long as you repay on schedule. The limit is generally the lesser of $50,000 or 50% of your vested balance, though some plans let you borrow up to $10,000 even if that exceeds 50%. Repayment runs five years with at least quarterly payments, and the interest goes back into your own account.

If you leave your job or otherwise fail to repay, the outstanding balance is treated as a distribution: taxed, and subject to the 10% penalty if you are under 59 1/2 and do not qualify for an exception.

Final thoughts

A Roth 401(k) delivers tax-free income in retirement, which compounds into real savings over a career. If you are weighing an early withdrawal, review the rules and estimate the tax and penalty first. A Certified Financial Planner can build a withdrawal strategy that covers both your short-term needs and your long-term plan, including how a Roth 401(k) fits alongside a traditional 401(k) withdrawal.

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