If you’ve accumulated company stock inside your workplace retirement plan, you may be hearing the term Net Unrealized Appreciation (NUA) pop up in conversations about retirement taxes. And if it feels a bit technical, you’re not alone. Many families are navigating similar questions—especially as they get closer to retirement and want to avoid costly surprises.
What is NUA?
Net Unrealized Appreciation (NUA) is the growth in value of employer stock held in a qualified retirement plan (like a 401(k))—specifically, the difference between:
- Your cost basis (what the plan paid for the shares), and
- The current market value of those shares.
In certain situations, NUA may allow that growth to be taxed at long-term capital gains rates—rather than as ordinary income—when the stock is eventually sold.
Why does NUA matter?
Normally, when you withdraw money from a traditional 401(k), the distribution is taxed as ordinary income.
NUA is different. With an NUA strategy:
- You take a lump-sum distribution from the plan after a triggering event (often retirement, separation from service, disability, or reaching age 59½).
- The company stock is distributed “in kind” to a taxable brokerage account (you receive shares, not cash).
- You generally pay ordinary income tax on the cost basis of the shares in the year of distribution.
- When you later sell the shares, the NUA portion (the appreciation that occurred inside the plan) is typically taxed at long-term capital gains rates, regardless of how long you hold the shares after the distribution.
A simple example
Suppose your 401(k) holds company stock worth $200,000, and the plan’s cost basis is $50,000.
- NUA = $150,000 If you use NUA correctly, you may owe ordinary income tax on $50,000 at distribution—while the $150,000 may receive long-term capital gains treatment when sold.
Important trade-offs to consider
NUA can be powerful, but it isn’t for everyone. A few key considerations:
- Concentration risk: Holding a large amount of a single stock can increase portfolio risk.
- Timing and cash flow: The tax on the cost basis is due in the distribution year.
- Rules are strict: If handled incorrectly (for example, rolling the stock to an IRA first), you may lose NUA eligibility.
- Potential impact on Medicare premiums and other tax items: Large income events can ripple into other areas.
A good next step
If you’re approaching retirement (or changing jobs) and have meaningful employer stock in your plan, it may be worth reviewing your options. The goal isn’t to chase a “perfect” strategy—it’s to choose a path that fits your tax picture, your risk comfort, and your long-term plan.