Net Unrealized Appreciation (NUA): The Overlooked Tax Strategy for Company Stock in Your 401(k)

If your 401(k) holds employer stock that's grown significantly in value, the default move at retirement — roll everything into an IRA — may not be the best one. A strategy called Net Unrealized Appreciation (NUA) can, in the right circumstances, meaningfully lower the tax bill on that stock. It's also easy to miss, because once you roll the account into an IRA, the opportunity is gone for good.

What NUA Actually Does

Normally, money you take out of a 401(k) or IRA is taxed as ordinary income — including gains on any company stock inside it. NUA works differently: if you take a lump-sum distribution of your entire 401(k) and move the employer stock portion directly into a taxable brokerage account (rather than rolling it into an IRA), you generally pay ordinary income tax only on the stock's original cost basis at the time it was contributed. The appreciation since then — the "net unrealized appreciation" — is taxed at long-term capital gains rates when you eventually sell, regardless of how long you've actually held the shares after the distribution.

For someone whose employer stock has appreciated substantially over a long career, the difference between ordinary income rates and long-term capital gains rates on that appreciation can be significant.

Why It's Easy to Miss

NUA only applies at the point of a qualifying lump-sum distribution — generally triggered by separation from service, reaching age 59½, disability, or death — and the entire retirement plan balance generally has to be distributed within the same tax year to qualify. If the stock has already been rolled into an IRA, the NUA opportunity is gone; IRAs don't retain the special tax treatment. That makes NUA a decision that has to be made before a rollover, not after — which is exactly when many people default to "just roll it all into an IRA" without stopping to check whether they're holding appreciated company stock.

When NUA Makes Sense — and When It Doesn't

NUA tends to be more attractive when the stock has appreciated a great deal relative to its cost basis, when you're not counting on tax-deferred growth on that specific piece of the account, and when your capital gains tax bracket is meaningfully lower than your ordinary income bracket. It tends to make less sense if the appreciation is modest, if you need the funds to keep growing tax-deferred, or if you're already carrying a concentrated position in that stock and want to reduce it rather than hold onto it in a taxable account. The decision also has to account for the immediate tax bill on the cost basis, which is due in the year of the distribution regardless of whether NUA otherwise makes sense.

The Bottom Line

If your 401(k) includes employer stock — common for many energy-industry employees who've built positions in company stock over a long career — it's worth having this conversation before you initiate any rollover or distribution, not after.

This article is for general educational purposes only and does not constitute tax, legal, or investment advice. Net Unrealized Appreciation involves specific IRS rules and individual tax consequences that vary by situation. Consult a qualified tax advisor and fiduciary financial advisor before making any distribution decision.