He Retired With $600,000 in Company Stock. One “Simple” IRA Rollover Erased a Tax Break He Could Never Recover.

The Retirement Party, and the Advice That Follows

A man retires after roughly four decades at a large industrial company. He began as a line supervisor, became a plant manager and eventually earned a title long enough to fill the plaque presented at his retirement party. Along the way, his 401(k) accumulated company stock purchased at prices he can barely remember.

On his way out, a well-meaning voice from HR or the plan’s call center offers familiar advice: roll everything into an IRA. One account, one statement, no loose ends. He signs the form. Only later does he learn that the rollover may have erased a valuable tax break. The stock did not change. The account holding it did, and that door generally does not reopen.

The Tax Break Hiding Under the Share Price

Employer stock inside a workplace retirement plan may qualify for special treatment called net unrealized appreciation, or NUA. Suppose his plan holds company shares worth $600,000 with a cost basis of $60,000. If the requirements are met, the shares can be distributed directly to a taxable brokerage account. He generally owes ordinary income tax on the $60,000 basis in the year of distribution.

The remaining $540,000 is deferred until he sells the stock. That embedded appreciation is then treated as a long-term capital gain, regardless of how quickly he sells after the distribution. The rest of the 401(k), including funds that are not employer stock, can generally roll into an IRA without current tax. The result is a split destination: company shares go to the brokerage account, while the remaining retirement assets go to the IRA.

Roll the shares themselves into the IRA, however, and the NUA treatment is generally lost. Future withdrawals are taxed as ordinary income. The appreciation that accumulated over four decades no longer receives capital-gains treatment.

It Is Valuable, but Not Automatic

NUA requires more than owning company stock. The distribution must generally follow a qualifying event, such as leaving the employer, and the entire balance of the employer plan must be distributed within one tax year. The stock goes to a taxable account, while other assets may be rolled over.

The immediate tax bill matters too. Paying ordinary income tax on $60,000 at once may be difficult, particularly if the retiree also receives severance, a pension or other taxable income that year. Concentration risk does not disappear merely because the tax treatment is attractive. Someone with much of his retirement tied to one employer may still need to sell and diversify. NUA changes how the appreciation is taxed. It does not make the stock safer.

Where Social Security Enters the Decision

Both IRA withdrawals and realized capital gains can increase the income used to determine how much of a retiree’s Social Security becomes taxable. NUA does not make a stock sale invisible to that calculation. What it provides is control.

An IRA withdrawal is generally taxed entirely as ordinary income. With NUA shares, the original basis has already been taxed, and the retiree decides when and how much stock to sell. He can spread sales across several years, coordinate them with lower-income periods and avoid having those shares included in future required minimum distributions. A large sale can still make up to 85% of his Social Security taxable and may raise Medicare premiums two years later. The advantage is the ability to choose the timing instead of waiting for an RMD to choose it for him.

The Question to Ask Before Signing

Before moving company stock, he needs two numbers from the plan administrator: its current market value and its cost basis. A large gap between them is the signal to stop and compare the NUA route with a full IRA rollover. The IRA may still win if the basis is high, the tax bill would be difficult to absorb or diversification matters more than capital-gains treatment.

The mistake is not choosing the IRA after running both paths. It is rolling first and asking about NUA later. The biggest number on his retirement statement was $600,000. The most valuable one may have been the $60,000 cost basis hiding underneath it.

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