401(k) Rollovers Explained: What Happens to Your Money

You leave a job. Two weeks later a letter arrives from a company you have never heard of, explaining that your retirement plan balance requires an election, and offering four boxes to check.

Most people check whichever box the letter seems to prefer.

That letter is one of the highest stakes pieces of mail you will ever receive, and it is written like a parking notice.

So let us go through what actually happens to the money, in order, with the traps marked.

Every departing employee has the same menu. The IRS describes the mechanics on its page covering rollovers of retirement plan and IRA distributions.

The fourth row is the one to be afraid of, and it is chosen far more often than it should be, usually by people with smaller balances who assume the amount is too modest to matter.

Put numbers on it, because "you lose some to taxes" does not land.

Take a $50,000 balance, someone in their fifties, in a middle tax bracket.

So a $50,000 balance becomes something closer to $30,000. And that is only the visible half.

The invisible half is the compounding. That same $50,000, left alone for twenty years at a 7% average return, would be worth roughly $193,000. The real price of cashing out is not the $20,000 in tax. It is the $160,000 that never happened.

This is the single most common self-inflicted wound in the whole process, and it comes from one word on a form.

There are two kinds of rollover.

Here is how the disaster unfolds. You elect the indirect version. The plan withholds 20% and sends you 80%. You deposit that 80% into an IRA within 60 days, feeling responsible.

You just created a taxable distribution of the withheld 20%, because you did not roll it over. To make yourself whole you had to deposit the full original amount, which means covering the withheld portion out of savings and waiting until you file to get it back.

There is also a limit of one 60-day IRA-to-IRA rollover in any 12-month period. Direct trustee-to-trustee transfers are not subject to that limit, which is another reason to use them.

The rule is simple. Never let the money touch you. Ask for a direct rollover, made payable to the receiving institution for your benefit, not to you personally.

The default advice is always "roll it to an IRA," and it is frequently wrong. Here is the real comparison.

Two of those rows can cost five or six figures if you get them wrong.

The age 55 rule. If you separate from service in or after the year you turn 55, distributions from that employer's plan can avoid the 10% early distribution penalty. Roll the money to an IRA and that access disappears until 59 and a half. For anyone retiring in their mid fifties, this single fact can outweigh every fee argument. We went through the plan-level details in the 401(k) rules that decide if you can retire at 55.

The pro rata rule. If you make backdoor Roth contributions, a large pretax IRA balance makes every future conversion partially taxable in proportion to your total IRA balances. Money sitting in a 401(k) is invisible to that calculation. Money in an IRA is not.💳 The outstanding loan nobody mentions

Millions of people leave a job with a 401(k) loan outstanding and have never read what happens next.

The loan does not follow you. It generally becomes due, and if you cannot repay it, the unpaid balance is treated as a distribution: income tax, plus the early distribution penalty if you are under the applicable age.

There is relief. The deadline to repay or roll over a plan loan offset amount has been extended in recent law to roughly your tax filing deadline, including extensions, for the year of the offset. That turns a two month panic into a much longer runway, but you still have to find the money and complete the rollover.

If you have a loan and you are thinking about leaving, put this at the top of the checklist.

If your plan holds employer stock, there is a tax treatment worth understanding before you initiate any rollover, because rolling the shares into an IRA destroys it permanently.

It is called net unrealized appreciation. In a qualifying lump sum distribution, you move the company stock in kind to a taxable brokerage account.

You pay ordinary income tax only on the original cost basis. The appreciation above that is taxed at long term capital gains rates when you sell.

The requirements are strict, the sequence matters, and doing the steps out of order voids the election.

But the piece of information you need first is simple: ask your plan administrator for the cost basis of the company stock before you sign anything. Once the shares are sold or rolled into an IRA, the option is gone for good.

If you have both pretax and Roth money in the plan, they are two separate buckets and they go to different places.

One detail worth knowing: a Roth 401(k) is subject to required minimum distributions rules that differ from a Roth IRA's, and rolling a Roth 401(k) into a Roth IRA has historically been a way to escape lifetime RMDs on that money. Confirm the current treatment on the IRS's required minimum distribution FAQ before assuming either way.

Also, Roth IRAs have their own five year clocks, and the clock on a Roth IRA does not automatically inherit the age of your Roth 401(k). If you have never owned a Roth IRA, opening one with even a small amount starts that clock running, which is a cheap piece of future flexibility.

The average worker changes jobs many times. Each one can leave a small orphaned balance behind, and small balances have a way of disappearing.

People discover years later that an old employer moved their money into a default account earning almost nothing, or cashed it out entirely and mailed a check they deposited without realizing what it was.

If you have worked at several places, go find them. The Department of Labor's Employee Benefits Security Administration handles participant rights and can point you toward locating abandoned plans, and old tax returns will show which employers you had in which years.

"Roll it to an IRA for lower fees" is repeated so often that nobody checks whether it is true in their case. Sometimes it is dramatically true. Sometimes it is backwards.

Every plan is required to disclose its costs to participants, and the Department of Labor explains those disclosure rights in its EBSA participant publications. Request the document. It exists whether or not anyone has ever shown it to you.

The gap between a 1.30% plan and a 0.10% IRA is 1.20% a year. On a $400,000 balance that is $4,800 annually, and over twenty years the compounding difference runs well into six figures.

But the reverse happens too. Very large employers frequently negotiate share classes that no retail investor can access, and a stable value fund inside a 401(k) has no true equivalent in an IRA.

Those funds often pay meaningfully more than a money market fund with similar stability, which is a genuine reason some retirees deliberately leave their bond allocation in the old plan and move only the equities.

So the honest instruction is: get both numbers before deciding. Not a rule of thumb. The actual numbers.

Here is a move that gets almost no attention: you do not have to choose one destination for the entire balance.

That last row deserves more attention than it gets. Rolling into your new employer's plan keeps the ERISA creditor protections, keeps the pretax balance invisible to the backdoor Roth pro rata calculation, and may preserve the still-working exception to required minimum distributions if you work past RMD age.

The IRS explains the plan rules on its 401(k) plans overview, and the specifics of what your new plan accepts are in its own plan document.

The trade is a narrower investment menu. For many people that is a fair price.

Everything above assumes you are moving between jobs. If this rollover is happening because you retired, three things shift.

That second row is genuinely useful. Required minimum distributions from multiple traditional IRAs can generally be totaled and satisfied from whichever IRA you prefer, while each employer plan typically demands its own separate distribution. Consolidating old plans into one IRA can simplify that considerably.

The rules live on the IRS's Publication 590-B, which covers distributions from individual retirement arrangements.

And the fourth row is the one people waste. The years between your last paycheck and your first required distribution are usually the lowest income years you will ever have as an adult.

What you do with them, and specifically how much you move out of pretax accounts at low rates, tends to matter more than which custodian holds the money.

Step ten catches an enormous number of people. The money transfers successfully, arrives as cash, and then sits uninvested for years because nobody realized it needed a second action.

During most of that window your money is out of the market. There is no way around it in a standard rollover, and it is a real consideration if you are moving a large balance. It is not a reason to avoid rolling over, just a reason not to be surprised.

Plan providers do not use plain language, so here is a translation of the phrases you will meet on the form.

The last row is the practical test. If the check is made out to you, it is not a direct rollover no matter what the representative called it on the phone. If it is made out to the receiving institution "FBO" your name, you are safe even if the check is physically mailed to your house.

You will also receive a Form 1099-R for the year of the distribution. This alarms people who did a clean direct rollover and assumed they would get no tax form. You will get one regardless.

The distribution code on it tells the IRS it was a rollover rather than a taxable event, and you still report it on your return.

Getting the form is normal. Getting a form with the wrong code is the problem, and it is worth checking against the IRS's IRA FAQ guidance if something looks off.

Someone leaves a job at 57 with $480,000 in a 401(k), including $90,000 of company stock with a $20,000 basis, and a $12,000 outstanding loan.

Nothing in that sequence is exotic. It is four phone calls and one form. The difference between that version and checking the first box on the letter is tens of thousands of dollars, spread across tax, penalty and access.

And notice what step four buys. It is not about investment returns. It is about being able to reach your own money for two and a half years without a 10% penalty, which is exactly the window most early retirees need.

If you are planning that kind of exit, the health coverage piece is the other half of the problem, and we covered it in health insurance if you retire before 65.

Cashing out a small balance. The tax is the smaller loss. The compounding is the larger one.

Choosing the indirect rollover. Triggers withholding and a 60-day clock for no benefit whatsoever.

Rolling out at 55 or later without checking. Trades away penalty-free access to your largest asset.

Rolling company stock into an IRA. Permanently destroys favorable tax treatment, and nobody at the receiving brokerage will warn you.

Forgetting to invest after the transfer. Years of cash drag on money you thought was working.

The letter makes it look like an administrative choice. It is a tax decision, an access decision and sometimes an irreversible one.

The safe default for most people is straightforward:

Once the money lands, the next question is what order to spend it in later, which is a separate and expensive decision of its own. We mapped that out in the retirement withdrawal order guide.

See you next issue. 🪙

This is general education, not financial, tax or legal advice. Rollover rules, withholding requirements, early distribution penalty exceptions, plan loan offset deadlines, force out thresholds, RMD ages and NUA requirements are set by federal law and individual plan documents, and both change over time. Tax and penalty figures used here are simplified illustrations that ignore state taxes and individual circumstances. Rollovers and NUA elections can be irreversible. Confirm current rules with the IRS and consult a licensed tax professional and your plan administrator before taking any distribution.

Sources: IRS guidance on rollovers of retirement plan and IRA distributions, Roth IRAs, required minimum distributions, plan loan offsets and net unrealized appreciation; U.S. Department of Labor Employee Benefits Security Administration materials on retirement plan participant rights and ERISA protections.