Net Unrealized Appreciation on Company Stock: How the NUA Strategy Beats a 401(k) Rollover.

A long-tenured employee retires from a public company with a 401(k) that is half company stock, shares the employer match dropped in over two decades that are now worth far more than anyone paid for them. The default the recordkeeper offers is to roll the whole account into an IRA. For the company stock, that default is often the most expensive choice on the menu. Net unrealized appreciation on company stock is a one-time election under IRC §402(e)(4) that lets you pull the shares out of the plan, pay ordinary income tax on only their original cost, and have the entire built-in gain taxed later at long-term capital gains rates. Here is how the election works for 2026 and when it beats a rollover.

Start with what a rollover does to that stock. Money inside a 401(k) has never been taxed, so every dollar that later comes out of a traditional IRA, contributions, the employer match, and all the growth, is taxed as ordinary income. Roll the company stock into an IRA with everything else and you convert what could have been capital gain into ordinary income, permanently. IRC §402(e)(4) carves out an exception for employer securities. If the shares leave the plan in kind as part of a lump-sum distribution, you are taxed now on only the plan's cost basis in the stock, and the net unrealized appreciation, the spread between that basis and the market value on the day it comes out, is not taxed until you sell. When you do sell, that appreciation is long-term capital gain no matter how long you actually held the shares.

The whole strategy is a rate arbitrage. The cost basis is taxed as ordinary income, so you want it small, and it usually is, because it reflects what the shares were worth years ago when they went into the plan, not what they are worth today. The appreciation then rides at the long-term capital gains rate, 0%, 15%, or 20% for 2026 depending on your taxable income, instead of an ordinary rate that tops out at 37%. There is a second, quieter benefit. The NUA portion is treated as part of a retirement plan distribution, so it is not subject to the 3.8% net investment income tax under §1411, even though it is reported as a capital gain. Only the appreciation that builds up after the shares leave the plan can be reached by that surtax. IRS Notice 98-24 is the authority that locks the in-plan appreciation into long-term treatment regardless of holding period.

The election only exists inside a 'lump-sum distribution,' and §402(e)(4)(D) defines that term narrowly. You have to distribute the entire balance of the account within a single tax year, and the distribution has to follow one of four triggering events: separation from service, reaching age 59½, death, or disability. The employer stock comes out as actual shares, transferred in kind to a taxable brokerage account, while the rest of the plan can roll to an IRA in the same year. Two mistakes end the election before it starts. Taking a partial distribution in an earlier year, even a small one after the last triggering event, can disqualify the lump sum. And rolling the shares themselves into an IRA, instead of moving them in kind to a taxable account, collapses the NUA into ordinary income for good. The strategy is all-or-nothing on timing and unforgiving on the mechanics.

The $68,000 gap is the cost of the default. Both paths move the same $500,000 out of the plan in the same year. Path B taxes every dollar at 41.5% because an IRA withdrawal is ordinary income. Path A taxes only the $100,000 of old basis at that rate and lets the $400,000 of appreciation out at 24.5%, with no net investment income tax on top. The wider the spread between basis and market value, the larger that gap becomes. A position that is 90% appreciation and 10% basis is the textbook case for the election. A position that is mostly basis barely moves the needle.

Electing NUA accelerates the tax on the basis into the current year, which is the price of the long-term rate on the gain. If you are under 59½ when you take the distribution, that basis can also draw the 10% early-distribution penalty under §72(t), but only the basis, the taxable ordinary-income piece. The NUA and any later appreciation are never subject to the penalty regardless of your age. There is a common exception that erases even the basis penalty: §72(t)(2)(A)(v) waives the 10% charge if you separated from service in or after the year you turned 55. So a 56-year-old who retires and elects NUA pays ordinary tax on the basis with no penalty, while a 50-year-old who does the same pays the 10% on the basis alone. Either way, the appreciation rides free of the penalty and waits for the capital gains rate.

The election is powerful, but it is not automatic and it is not always the right call. A few situations argue for rolling the stock to an IRA like everything else.

• ◆The basis is a large share of the value. NUA only helps to the extent the stock has appreciated. If the basis is most of the position, you are paying ordinary tax now on a big number to save capital gains tax on a small one, and the deferral inside an IRA is usually worth more.
• ◆Your ordinary bracket in retirement is low. The arbitrage is the gap between your ordinary rate and the capital gains rate. A retiree who will draw the IRA down in a 12% or 22% bracket may never face the 37% rate the NUA election is built to dodge, so the rollover wins.
• ◆You need to diversify out of a concentrated position. NUA rewards holding a single stock. If a large slice of your net worth is one employer's shares and you plan to sell and diversify right away, the concentration risk during the wait can swamp the tax benefit. Selling immediately still captures the NUA rate, so the real question is how long you hold.

This is the same ordinary-versus-capital question that runs through most equity-compensation planning, just inside a retirement plan instead of a brokerage account. The ESPP disqualifying disposition cost basis problem is its mirror image, a case where company stock gets over-taxed as ordinary income because the basis is reported wrong, and the crossover math on exercising ISOs is another timing call between today's rate and tomorrow's. Utah conforms here: the state starts from federal taxable income and does not decouple from §402(e)(4), so the ordinary piece and the capital-gains piece both flow through to the Utah return at the 4.5% individual rate H.B. 106 set for tax years beginning in 2025. The election is made by how you take the distribution, not on a form you file later, which is exactly why the planning has to happen before the shares move.