Net Unrealized Appreciation (NUA)

Net Unrealized Appreciation is a special tax treatment available to employees who hold their employer's stock inside their 401(k) (or other qualified plan) at retirement. Under a standard rollover, every dollar eventually withdrawn from an IRA is taxed as ordinary income — including the appreciation on employer stock. Under NUA treatment, the appreciation is instead taxed at long-term capital gains rates, which are usually 10–20 percentage points lower.

The rules are strict and the execution window is narrow. To qualify, the entire 401(k) balance must be distributed in a single tax year, the employer stock must be transferred in-kind (not sold inside the plan and rolled over), and the distribution must follow a qualifying event (separation from service, reaching age 59½, disability, or death). Once any portion of the 401(k) is rolled over to an IRA, the NUA election is usually lost forever.

The cost-basis tax (ordinary income on what you originally paid for the stock) is due in the year of distribution. The appreciation (the NUA) is only taxed when you eventually sell the shares, and then only at long-term capital gains rates.

NUA is especially valuable for long-tenure employees of companies whose stock has appreciated substantially — think a 25-year General Motors, Ford, Bosch, or similar employee whose plan has accumulated meaningfully appreciated stock. In the right circumstances, the total lifetime tax savings can easily reach six figures.

The most common mistake is to roll everything to an IRA on the way out the door before talking to an advisor. The option is lost permanently. Anyone retiring out of a 401(k) with employer stock in it should run the NUA analysis before signing any distribution paperwork.