Roth IRA vs. Roth 401(k): What Changes in Retirement?

You have been told they are the same thing. Roth is Roth. Pay tax now, withdraw free later, done.

That is true for about the first eleven years.

Then you retire, and the two accounts start behaving like completely different animals. One lets you reach your own money. The other does not. One has a clock that started decades ago. The other may have a clock that started last Tuesday.

And one of them will happily hand your heirs a much worse outcome than the other.

The strange part is that during your working years, the Roth 401(k) is usually the better account. Bigger limit, employer match, no income test.

Then the moment you stop working, the advantages flip.

Most people never notice the handover. They retire holding a Roth 401(k), assume the job is done, and leave it there because moving it seems like paperwork for no reason.

Sometimes that is right. Often it is not.

Let's find out which one you are.

Start with the genuine similarities, because there are real ones.

Both take after-tax money. No deduction going in.

Both grow without annual tax on dividends or gains.

Both produce tax-free qualified distributions, including the growth.

And thanks to a relatively recent change, designated Roth accounts in workplace plans no longer require lifetime withdrawals for the original owner. That used to be the single biggest difference. It is gone.

A lot of advice written before that change is now simply wrong, and it is still circulating.

So on the headline features, they match.

Everything below the headline does not.

Read rows one through three while you are working. Read rows five and six after you retire.

That is the handover, and it happens on a single day.

This is the difference that matters most, and almost nobody knows it.

A Roth IRA has ordering rules. Money comes out in a fixed sequence: your regular contributions first, then converted amounts, then earnings.

Your contributions are money you already paid tax on. So they generally come out with no tax and no penalty, at any age.

The earnings sit at the back of the line, protected.

A Roth 401(k) does not work this way.

A non-qualified distribution from a designated Roth account comes out pro-rata. Every dollar you withdraw is part contribution and part earnings, in proportion to the account.

You cannot select the safe money. The plan blends it for you.

Watch what that does with numbers.

Same balance. Same withdrawal. One is clean and one generates a tax bill.

This matters enormously for anyone who might touch the money before 59½, and it is the strongest single argument for eventually moving a Roth 401(k) into a Roth IRA.

One caution worth stating plainly. Being able to reach your contributions is a safety feature, not a spending plan. Every dollar you pull out stops compounding tax-free permanently, and you cannot put it back beyond the annual limit.

Both accounts require a five-taxable-year period before a distribution is qualified. The clocks are not the same clock.

Your Roth IRA clock starts with your first contribution to any Roth IRA, and it covers all of them. Open a second Roth IRA at 70 and it inherits the seasoning. One clock, per person, forever.

Your Roth 401(k) clock is per plan. Change jobs, start a new Roth 401(k), and that new plan starts its own period. Your ten years at the old employer do not automatically transfer.

Now the trap that catches people at exactly the wrong moment.

When you roll a Roth 401(k) into a Roth IRA, the receiving Roth IRA's clock governs.

So someone who contributed to a Roth 401(k) for twelve years, then rolls it into a Roth IRA they opened last month, may find that the earnings are not yet qualified.

Twelve years of seasoning, gone, because the destination account was new.

Which produces the single cheapest piece of advice in this article.

Open a Roth IRA now. Put in any amount. Even ten dollars.

It starts a clock you cannot start retroactively, and you may not need it for twenty years. That is exactly why it should happen today rather than when you retire.

Plan-to-plan is different. Rolling a Roth 401(k) directly into another employer's designated Roth account can carry your earlier contribution history in certain circumstances. But most people do not have that option, because most new plans do not accept it.

Be fair to the Roth 401(k). During your career it is frequently the better account, and for three specific reasons.

The limit is roughly three times larger. If you want to build serious Roth money, the workplace plan is where the volume lives. The current limits are on the IRS site, alongside the much smaller IRA figure.

There is no income test. This is the one high earners miss. Roth IRA contributions phase out at higher incomes. Roth 401(k) contributions do not.

So the person locked out of a Roth IRA by income can often still make Roth contributions at work. Plenty of them never find out, because they assume "Roth" carries an income limit everywhere.

There may be a match. An IRA has no employer, so it can never hand you free money.

One detail that changed recently and confuses people. Employer matching contributions can now be made as Roth contributions if the plan offers it and you elect it. Historically the match always landed on the pre-tax side regardless of where your own money went.

If your plan offers a Roth match, electing it means the match is taxable to you in the year it is made. That is a real decision, not a formality.

There is also a rule worth knowing for higher-paid older workers. Under current law, if your prior-year wages from the plan sponsor exceeded a set threshold, catch-up contributions may have to be made on a Roth basis rather than pre-tax.

Which means some people are building Roth 401(k) balances whether they planned to or not.

Everything above stops applying the moment you stop contributing.

The higher limit is irrelevant. You are not contributing.

The match is irrelevant. There is no employer.

The income test is irrelevant. You are not making new contributions to either.

What is suddenly relevant is access, flexibility and what happens to your heirs. And on all three, the Roth IRA is stronger.

The fourth row deserves attention because it is invisible until it is too late.

Some employer plans require a beneficiary to take the entire balance within a very short window, sometimes as a single lump sum. A Roth IRA generally gives a beneficiary the full period the law allows.

Same money, same tax-free character, but one gets stretched and one gets compressed.

Both retire at 62 with $340,000 in a Roth 401(k). Both have paid tax on every dollar going in. Both assume they are finished thinking about it.

Ray leaves it in the plan.

At 64 his furnace dies and he needs $22,000. He requests it from the Roth 401(k).

The plan distributes pro-rata. Because his account is roughly two thirds contributions and one third earnings, about $7,300 of that withdrawal is earnings.

He is over 59½. But he started that Roth 401(k) only four years before retiring, when his employer first added the feature. The plan's five-year period is not satisfied.

So $7,300 is taxable income he did not expect, in a year he thought he was safely tax-free.

Worse, that income lands on his tax return, which two years later helps determine his Medicare premium.

A furnace cost him more than a furnace.

Diane rolled hers into a Roth IRA at 62.

She had opened a Roth IRA in 2009 with $500, on a whim, because a colleague mentioned it. She contributed to it twice and then forgot it existed.

That forgotten account had been running its five-year clock for thirteen years.

When she rolled the $340,000 in, the receiving account's seasoning governed, and it was long since satisfied. Her entire balance is qualified.

When her furnace dies, she takes $22,000 and nothing is taxable. Her return does not move. Her Medicare premium does not move.

Same career. Same savings. Same retirement date.

The difference was a $500 account she opened thirteen years earlier and never thought about again.

That is the entire case for starting the clock now.

Since most people will eventually do this, here is the sequence that avoids the common mistakes.

First, open the Roth IRA and let it age. Ideally years. At minimum, open it before you initiate anything.

Second, ask the plan for a direct rollover. Never accept a check made out to you. Plan distributions paid to you personally can carry mandatory withholding, and replacing withheld money out of pocket is how people accidentally shrink their rollover.

Third, confirm the split in writing. If your plan holds both pre-tax and Roth money, state exactly which portion goes to which destination. Pre-tax to a traditional IRA or your new employer's plan. Roth to the Roth IRA.

This is where errors happen, and a misrouted pre-tax balance becomes an unintended taxable conversion.

Fourth, ask what your basis was. The plan tracks how much of the Roth balance is contributions versus earnings. Get that figure and keep it. Your new custodian will not have it, and it matters for ordering rules later.

Almost nobody asks for this number, and reconstructing it afterwards is difficult.

Fifth, check the beneficiary form on the new account. A rollover does not carry your old designation across. The new account starts blank or with a default, and that default is rarely what you want.

Usually yes, eventually. But there are real reasons not to, and they are specific.

Reasons to move it to a Roth IRA

The ordering rules give you access to your own contributions. The investment menu opens up. You consolidate accounts your family would otherwise have to find. Your beneficiaries get better options. And you stop being subject to a plan document that your former employer can amend without asking you.

Reasons to leave it where it is

Your plan has institutional funds you cannot buy retail. Stable value options do not exist outside employer plans.

Employer plan assets generally carry strong federal creditor protection. IRA protection depends on federal and state law and the circumstances, and in some states it is meaningfully weaker.

And the big one for early retirees: if you separated from service in or after the year you turned 55, the separation-from-service exception applies to that employer's plan and does not survive a rollover.

That matters less for a Roth 401(k) than a traditional one, since your contributions were already taxed. But it is not nothing.

The timing question nobody asks

If you are going to roll it over, the best time to open the receiving Roth IRA was years ago. The second best time is now, before the rollover, so the clock has been running.

Do not open the destination account on the same day you initiate the transfer.

Fees are yours to control in only one of them.

A 401(k) charges what the plan charges. Recordkeeping fees, administrative fees, and whatever the fund menu costs. You have no vote.

Some plans are outstanding. Large employers often negotiate institutional share classes that individual investors simply cannot buy, at costs that beat anything retail.

Others are dreadful. Small employer plans can layer administrative charges on top of expensive actively managed funds, and a former employee has no leverage to change any of it.

In a Roth IRA you pick the custodian and you pick the funds. If the arrangement gets expensive, you move.

So the honest version is not "IRAs are cheaper." It is: in an IRA, the cost is a decision you make. In a plan, it is a decision made for you.

Pull your plan's fee disclosure before assuming either way. The document exists and most participants have never opened it.

One of them can be changed without asking you.

This one rarely gets mentioned and it is worth sitting with.

A 401(k) operates under a plan document. Your former employer can amend that document. They can change the fund menu, change the recordkeeper, restrict partial withdrawals, or force out small balances.

They are not doing anything wrong. It is their plan. But you are a former employee with no say, and notices go to whatever address they have on file.

A Roth IRA has no such exposure. Nobody can rewrite the terms of your account because a benefits committee met.

For someone who plans to hold an account for thirty more years, that difference in control compounds quietly.

You have a Roth 401(k) and have never had a Roth IRA.

This is the most common and most expensive version. Open one immediately with a token amount. Do it before you retire, before you roll anything, before you need it.

Your plan holds both pre-tax and Roth money.

They are separate buckets and must go to separate destinations. Pre-tax to a traditional IRA, Roth to a Roth IRA. Mixing them creates a taxable conversion you did not intend.

Ask for a direct rollover and confirm in writing which portion goes where.

You want to move only the Roth portion.

Often possible, and often smart. Moving the Roth money to a Roth IRA while leaving pre-tax money in the plan keeps your traditional IRA balance at zero, which protects a clean backdoor Roth path.

You took a loan against the plan.

Leaving employment usually accelerates repayment. An unpaid balance can be offset and treated as a distribution, and that applies to the plan generally, not just the pre-tax side.

You are under 59½ and might need the money.

This argues strongly for the Roth IRA, because of the ordering rules. It is the clearest case in the article.

You are a beneficiary rather than the owner.

None of the lifetime rules apply. An inherited Roth account has its own distribution schedule and cannot simply sit there growing. Beneficiary rules run separately.

Your plan lets you do in-plan Roth conversions.

Some plans allow you to convert pre-tax balances to the Roth side without leaving. That is a different transaction with its own tax bill, and it is worth knowing whether your plan offers it.

You are still working past 73.

Neither account requires lifetime withdrawals for the owner anymore, so this is no longer the deciding factor it once was. Your pre-tax balances are a different story.

One more framing, because it is easy to over-rotate on a single account.

The Roth question is separate from the workplace-versus-personal question. You can hold a traditional 401(k) and a Roth IRA. You can hold a Roth 401(k) and a traditional IRA. Nothing forces consistency.

The wrapper decides contribution room, employer money and access rules. The tax flavour decides when you pay. Two independent axes, four combinations, and most sensible portfolios end up holding more than one.

We went through the wrapper axis in 401(k) vs IRA and the tax axis in traditional IRA vs Roth IRA.

How much of your total should sit on the Roth side is a different question again, sized in how much of your retirement should be Roth.

And once you are actually spending the money, which account you draw from in which year is where the real money is won or lost, covered in what happens to a Roth IRA when you retire.

This article answers a narrower question than any of those. Given that you already have Roth money in two places, what changes when the paychecks stop.

The answer is: the account that was winning starts losing, and the one that was quietly sitting there becomes the one that matters.

Four things, none of them hard.

Find out when your first Roth IRA contribution happened. If the answer is never, fix that today with any amount.

Check whether your plan separates the Roth balance clearly on your statement. Some do not, and you need to know the split before any rollover.

Ask your plan what happens to the account if you die. Specifically, how long does a beneficiary have. The answer varies wildly and it is written in a document nobody reads.

If you are still working, check whether your plan offers a Roth match election and whether your catch-up contributions are required to be Roth.

They are not the same account. They just look the same for the first couple of decades.

While you are working, the Roth 401(k) usually wins on volume, on the absence of an income test, and on the match.

After you retire, the Roth IRA wins on access, on investment choice, on what your heirs receive, and on the one clock that actually covers all your accounts at once.

Which means the right answer for most people is not one or the other. It is the plan while you are working, the IRA afterwards, and a deliberate handover in between.

And the handover has a prerequisite that costs almost nothing and cannot be done late.

Open the Roth IRA. Start the clock. Worry about the rest later.

See you next issue. 🪙

This is general education, not financial, tax or legal advice. Contribution limits, Roth income ranges, catch-up rules, five year periods, distribution ordering, creditor protection and beneficiary payout rules are set by federal law and individual plan documents, and in some cases by state law. All of them change over time and depend on individual circumstances. Confirm your own dates and plan provisions before rolling anything over.

Sources: IRS guidance on designated Roth accounts in retirement plans, Roth IRAs, 401(k) and profit-sharing plan contribution limits, IRA contribution limits, catch-up contributions, exceptions to the tax on early distributions, and required minimum distributions for IRA beneficiaries.