When Company Stock Plays by Different Rules: The “NUA” Opportunity

If you’ve ever worked for a company that offered its stock inside your 401(k), there’s a lesser-known tax rule worth understanding before you retire or roll anything over: Net Unrealized Appreciation, or NUA.

NUA applies specifically to company stock held inside a retirement plan, and when used correctly, it can allow a large portion of that stock to be taxed at long-term capital gains rates instead of ordinary income rates. That difference matters especially when the stock has grown substantially over time.

But this isn’t a strategy you stumble into by accident. It’s a one-time decision, and once it’s gone, it’s gone for good.

What is NUA, in plain English?

Inside your 401(k), your company stock really has two values. There’s what you originally paid for it, otherwise known as your cost basis, and what it’s worth today.

If you simply roll that stock into an IRA, both pieces eventually get taxed the same way: as ordinary income when you withdraw the money.

Executing the NUA strategy changes that outcome. Instead of rolling over the company stock balance into an IRA, you could do an in-kind transfer to a non-retirement account. The original cost basis of the company stock is taxed as ordinary income at the time of the transfer, but the growth above that amount, which is the net unrealized appreciation, is taxed later at long-term capital gains rates when you sell the stock.

When the cost basis is low and the appreciation is significant, that difference can translate into meaningful, long-term tax savings.

When NUA is most useful

NUA tends to shine in a very specific set of circumstances. It works best when a large portion of the stock’s value is appreciation rather than original cost, meaning the cost basis is relatively low compared to the current value.

It also works best for people who don’t feel forced to sell everything at once. Instead of liquidating the stock immediately, you’re able to sell it gradually over time, managing capital gains intentionally rather than all in one tax year. And just as important, you have access to more sophisticated investment strategies, such as tax-loss harvesting and other capital-gains deferral strategies, that allow you to diversify away from that single-stock exposure in a thoughtful way, rather than simply hoping the company stock continues to perform.

In other words, NUA makes the most sense when you can pair tax efficiency with smart risk management, not when you’re swapping one problem for another.

A critical (and often missed) detail

Here’s the part that catches people off guard: once company stock is rolled into an IRA, the NUA opportunity disappears permanently. There’s no undo button.

That’s why this strategy is so often missed. Not because it was considered and rejected, but because it was never discussed before a rollover happened.

A Simple Example

Imagine your 401(k) holds $500,000 of company stock. Over the years, you only paid $50,000 for those shares—the remaining $450,000 is growth.

If you simply roll that stock into an IRA and withdraw it later, the entire $500,000 will eventually be taxed as ordinary income. At a 24% tax rate, that’s a potential tax bill of $120,000.

Now let’s look at the same stock using an NUA strategy.

When the stock is distributed from the 401(k) into a non-retirement account, only the $50,000 cost basis is taxed as ordinary income. At 24%, that’s $12,000 in tax.

The remaining $450,000 of appreciation is taxed later, when you sell the shares, at long-term capital gains rates. At a 15% capital gains rate, that’s $67,500.

Add those together:

· $12,000 on the cost basis
· $67,500 on the appreciation
· Total tax: $79,500

Same stock. Same value. But instead of a $120,000 tax bill, the total tax is $79,500, a difference of $40,500, simply because of how the company stock was handled.

That’s the power of NUA when the numbers line up.

Bonus NUA tip: resetting your cost basis (when the timing is right)

There’s an advanced wrinkle to NUA that’s worth knowing if you’re still working and your company stock lives inside your 401(k). If the stock ever drops below the price you originally paid, you may have an opportunity to reset your cost basis to a lower level. Because transactions inside a 401(k) aren’t subject to the wash-sale rule, this can be done without running afoul of the IRS tax loss harvesting rules. Imagine you’ve been steadily buying company stock for years, and then the business hits a rough patch. The stock price falls sharply—but you understand the company, believe in its long-term prospects, and expect it to recover. In that situation, selling the shares inside the plan and buying them back at the lower price can reduce your cost basis going forward. If the stock later rebounds, a larger portion of its value becomes appreciation rather than original cost. And when an NUA strategy is eventually used, that lower basis means a smaller amount taxed at ordinary income rates and more taxed at favorable long-term capital gains rates. This isn’t about market timing or speculation—it’s about being intentional during periods of volatility so that, if NUA is part of your future plan, the tax math works even more in your favor.

A word of caution

NUA isn’t something you “try out” or circle back to later. The rules are precise, the timing matters, and the decision is irreversible.

Handled thoughtfully, it can be a powerful way to reduce lifetime taxes on company stock. Handled casually or ignored, it can quietly disappear with a single rollover form.

This is one of those moments in retirement planning where slowing down, understanding your options, and coordinating decisions ahead of time can make a meaningful difference, not just in taxes, but in how flexible and resilient your overall plan becomes.

If you are looking for a tax strategy or tax planning that is aligned with your retirement goals, please reach out to our team of advisors by starting with an intro call, or check out tax planning on our website.

Disclosure:
All investments carry risk, and past performance does not guarantee future results. The NUA strategy may not be applicable to your situation, and in some situations, it could increase your tax liability. It may also result in taxes payable at a time when you may not have the cash available. You need to consult with your investment advisor and tax professional to determine what is right for your specific situation.