Net Unrealized Appreciation (Nua) Explained: How It Works And When To Use It In 2026

Most 401(k) participants don’t realize they have a powerful tax-optimization tool available to them. Net Unrealized Appreciation—or NUA—is a little-known IRS rule that can substantially reduce your tax bill on company stock held in your retirement plan. Yet according to Fidelity’s 2026 analysis, this strategy remains underutilized by millions of American workers who could benefit from it.

If you’re leaving your job, hitting age 59½, or planning a major financial transition, understanding NUA could mean the difference between paying ordinary income tax at rates as high as 37% and paying long-term capital gains tax at rates of 0%, 15%, or 20%. For someone with significant unrealized gains in employer stock, the tax savings can exceed six figures.

This guide walks you through exactly how NUA works, when you can use it, and whether it makes sense for your situation in 2026.

What Is Net Unrealized Appreciation (NUA)?

Short answer: NUA is the profit you’ve made on employer stock inside your 401(k), and the IRS allows you to pay long-term capital gains tax rates on that profit instead of ordinary income tax rates.

Let’s walk through a concrete example. Suppose your 401(k) holds 1,000 shares of your employer’s stock. You originally bought those shares at $100 per share through payroll deductions, giving you a cost basis of $100,000. Today, those shares are worth $200 per share, for a total current value of $200,000. The Net Unrealized Appreciation is $100,000—the gain you’ve made on the stock.

Under normal 401(k) rules, if you withdraw this stock, the entire $200,000 would be subject to ordinary income tax in the year of distribution. At the 37% top marginal tax rate for 2026 single taxpayers earning over $640,600, you’d owe $74,000 in federal income tax alone. However, with NUA treatment, you pay ordinary income tax only on the $100,000 cost basis (approximately $37,000 at the top rate), and you defer the $100,000 gain until you sell the stock. When you eventually sell it, that $100,000 gain is taxed as long-term capital gains at just 20% (the top rate as of 2026), resulting in $20,000 in tax. Your total federal tax liability drops from $74,000 to $57,000—a savings of $17,000 on this simplified example.

According to the IRS, NUA is always taxed at long-term capital gains rates when the stock is sold, regardless of how long the stock actually sat in your 401(k) plan. This is the critical advantage: the holding period doesn’t matter. You get long-term capital gains treatment automatically, which is codified in IRS Notice 98-24. This distinction between ordinary income tax and capital gains tax is what makes NUA such a powerful tool for high earners with significant company stock holdings.

NUA is reported to the IRS in Box 6 of Form 1099-R at the time of distribution. The amount shown in Box 6 is not taxed in the distribution year—it’s deferred until you sell the stock. This reporting mechanism ensures the IRS knows you’ve elected NUA treatment and will track the gains when you eventually liquidate.

How Does NUA Work Step-by-Step?

Short answer: You receive a distribution of employer stock from your 401(k), pay ordinary income tax on the cost basis only, and defer the appreciation gains until you sell the stock in a taxable account.

The mechanics of NUA involve a specific sequence of events and strict IRS requirements. Here’s exactly how the process works:

Step 1: Confirm You Have a Triggering Event

First, you must experience one of four IRS-recognized triggering events. These are separation from service, reaching age 59½, disability, or death (for beneficiaries). Separation from service is the most common trigger for NUA strategies; it occurs when you leave your employer for any reason—resignation, termination, or retirement. You cannot simply elect NUA while still employed and still working at the company. The triggering event must occur first, and it must be documented in your personnel or benefit records.

Step 2: Request a Lump-Sum Distribution in-Kind

After your triggering event, you must request a lump-sum distribution of the company stock from your 401(k) plan administrator. This is critical: the distribution must be of the actual stock certificates or shares, not a cash equivalent. The distribution must also occur within a single calendar tax year and must represent a distribution of your entire account balance (or at least the portion of the account you wish to access). You cannot cherry-pick just the appreciated shares; NUA treatment applies to all employer stock distributed as part of a lump-sum distribution.

Step 3: Direct the Stock to a Taxable Brokerage Account

The distributed stock must go directly into a taxable (non-retirement) brokerage account. This is where many people make a critical error. Rolling the company stock into an IRA after distribution disqualifies it from NUA treatment entirely. The stock must be distributed to your taxable brokerage account to preserve NUA status. You can roll other assets in the 401(k) (like mutual funds or cash) into an IRA without affecting NUA treatment of the distributed stock.

Step 4: Report NUA on Your Tax Return

In the year of distribution, you report the cost basis (the original purchase price) as ordinary income on your tax return. The NUA amount appears in Box 6 of Form 1099-R and is not taxed in the distribution year. You’ll include Form 4972 (Ordinary Gains from Lump-Sum Distributions) with your tax return to calculate any ordinary income tax owed on the cost basis.

Step 5: Hold and Sell the Stock in Your Taxable Account

Now you own the stock outright in a taxable account. You can hold it as long as you want or sell it immediately. Whenever you sell, the appreciation (the NUA) is taxed as long-term capital gains, regardless of when you actually bought the stock within the 401(k). You’ll report the sale using your original cost basis and the long-term capital gains rate will apply.

This five-step process requires precision. Missing any requirement—such as attempting to roll stock into an IRA or not receiving a true lump-sum distribution—disqualifies the entire strategy and reverts the stock to ordinary income tax treatment on the full amount.

What Are the Tax Advantages of NUA?

Short answer: NUA reduces your tax rate on investment gains from ordinary income rates (up to 37% in 2026) to long-term capital gains rates (0%, 15%, or 20%), potentially saving you tens of thousands of dollars on large stock holdings.

The tax advantage of NUA is substantial, particularly for high earners. The cost basis of distributed employer stock is taxed as ordinary income at the time of distribution, while the NUA itself is taxed at long-term capital gains rates when the stock is sold. This two-tier tax treatment creates enormous savings.

For 2026, the top marginal ordinary income tax rate is projected to remain at 37% for single taxpayers with incomes over $640,600 and for married couples filing jointly with incomes over $768,700, according to current tax law projections. The top long-term capital gains rate, by contrast, is 20%, with 0% and 15% tiers available depending on your income level. That’s a difference of up to 17 percentage points—or 17% of the gain—saved through capital gains taxation.

Consider a concrete example from Calamos Wealth Management’s analysis. Assume you have $1 million in employer stock with a $150,000 cost basis and $850,000 in unrealized appreciation. You’re in the 32% tax bracket for ordinary income. Using the NUA strategy, you pay ordinary income tax on the $150,000 cost basis ($48,000) and defer the $850,000 gain until sale. If you sell the stock immediately and pay 20% long-term capital gains tax on the $850,000 appreciation ($170,000), your total tax liability is $218,000. By contrast, if you rolled the stock into an IRA and later sold it, you’d owe ordinary income tax on the full $1 million sale price at 32% ($320,000)—a difference of $102,000 in taxes.

The savings grow even larger if you hold the appreciated stock longer before selling. Each year you wait, you can potentially benefit from stock price growth that isn’t immediately taxed. You also have the flexibility to sell in chunks across multiple tax years, potentially managing your income and keeping yourself in a lower tax bracket in any given year. For example, if you sell half the stock ($500,000) in year one and half in year two, you might stay in a lower tax bracket both years, further reducing your overall tax burden.

State income tax also plays a role. If you live in a state with capital gains taxes, long-term capital gains are often taxed at lower rates than ordinary income (or in some states, not taxed at all). The federal tax savings are magnified when combined with state tax advantages.

When Can You Use NUA in 2026?

Short answer: You can use NUA after a triggering event—separation from service, reaching age 59½, disability, or death—and you must take a lump-sum distribution of the stock to a taxable account within a single tax year.

Eligibility for NUA is narrowly defined by the IRS. You need both a qualifying trigger and a qualifying distribution type. Let’s examine each scenario:

Separation from service is the most common trigger. This means you’ve left your employer, whether through resignation, retirement, or involuntary termination. You don’t need to be reaching retirement age; separation from service at any age qualifies. This is particularly relevant for employees of companies with valuable stock, such as tech workers with heavily appreciated company shares or energy sector employees with substantial stock holdings. Separation from service is the most flexible trigger because it applies to anyone changing jobs.

Reaching age 59½ is the second trigger. If you’re still employed but turn 59½, you become eligible for NUA treatment on your 401(k) company stock. Some plans allow in-service distributions at this age, though not all do. You’ll need to check your specific plan document to see if this option is available.

Disability is the third trigger. If you become disabled (as defined by the IRS and your plan), you can access NUA treatment. Disability claims require medical documentation and are subject to specific IRS definitions.

Death is the fourth trigger, though this primarily benefits your heirs. If you pass away, your beneficiaries can receive a distribution of your employer stock and potentially benefit from NUA treatment, though they must follow the same distribution rules within the year of your death or the following year.

Beyond having a triggering event, the distribution itself must meet strict requirements. The distribution must be a lump-sum distribution, meaning you’re distributing all (or essentially all) of your account balance within a single calendar year. Partial or serial distributions over multiple years don’t qualify. The stock must be distributed in-kind—as actual shares or stock certificates—not as a cash equivalent or rolled directly into another retirement account. Many employees miss this requirement by instructing their plan administrator to sell the stock and roll the proceeds into an IRA, which immediately disqualifies NUA treatment.

You also must intend to hold the stock in a taxable account to preserve capital gains treatment. If you immediately roll the distributed stock into an IRA, you’ve lost NUA treatment and reverted to ordinary income taxation. The stock must stay in your personal taxable brokerage account to maintain NUA status.

NUA vs. Rollover: Which Strategy Should You Choose?

Short answer: Use NUA if you have significant unrealized gains in company stock and can afford to pay ordinary income tax on the cost basis now; use a rollover if you have modest gains, want to defer all taxes, or prefer to keep assets in a retirement account.

After a 401(k) withdrawal or job change, you face a critical decision: take NUA treatment on your company stock or roll everything into an IRA. This choice has profound long-term tax implications, and the right answer depends on your specific situation.

A rollover is the traditional approach. You direct your entire 401(k) balance, including company stock, into a Traditional IRA or Roth IRA. This defers all taxes until you withdraw the money. Rollovers are simple to execute, widely available, and offer maximum flexibility. You can invest the IRA proceeds however you want without any stock-specific restrictions. However, when you eventually withdraw from the IRA, all distributions—including the unrealized appreciation that’s now realized—are taxed as ordinary income. For someone in the 37% tax bracket, this means paying 37% on every dollar withdrawn, including the gains that accrued over decades inside the 401(k).

NUA, by contrast, requires you to pay ordinary income tax on the cost basis immediately but taxes the appreciation at long-term capital gains rates (20% or less) whenever you sell. This two-tier approach is advantageous when the appreciation (the NUA) is much larger than the cost basis. In the Calamos example cited above, the cost basis was $150,000 but the appreciation was $850,000. Paying 32% on $150,000 (roughly $48,000 in taxes) to avoid paying 32% on $850,000 (roughly $272,000 in taxes) is a smart trade. You’re accepting a smaller immediate tax bill to avoid a much larger eventual tax bill.

NUA is less advantageous when your cost basis and appreciation are roughly equal, or when you have only modest gains. If your company stock has barely appreciated, the cost basis and the value are nearly identical, and there’s no meaningful NUA benefit. In that case, a rollover offers simplicity without sacrificing much in tax savings.

The decision also depends on your income and tax bracket. If you’re in the 32% bracket now but expect to drop into the 24% bracket in retirement (a reasonable assumption for some retirees), a rollover might defer your taxes to when you’re in a lower bracket, reducing the ultimate tax burden. However, if you’re already in a high bracket and expect to stay there, NUA’s immediate capital gains taxation becomes more attractive.

Here’s the comparison in table form:

A lump-sum cash distribution—where you take all the money out and don’t roll it anywhere—is almost never the right choice. You’d owe ordinary income tax on the entire amount immediately, plus a 10% early withdrawal penalty if you’re under 59½. The full $1 million in the example above would be taxed as ordinary income with no opportunity to benefit from capital gains rates. This approach should be avoided except in unusual circumstances.

The decision between NUA and a rollover should involve a consultation with a tax professional who can model your specific situation, including state taxes, Net Investment Income Tax considerations, and your expected retirement income trajectory.

What Are the Risks and Drawbacks of NUA?

Short answer: NUA requires immediate payment of ordinary income tax on the cost basis, exposes you to concentration risk in a single stock, and disqualifies you from IRA protection and creditor protections that rollover accounts provide.

While NUA can save substantial taxes, it’s not appropriate for everyone and carries meaningful risks that must be weighed against the potential savings.

First, NUA requires you to pay ordinary income tax on the cost basis in the year of distribution. In the $1 million example with a $150,000 cost basis, you’d owe approximately $48,000 in federal income tax (at 32%) in year one, even if you don’t sell any of the stock. This upfront tax bill can be substantial. You need the cash to pay this tax; you can’t use the appreciated stock to cover it. For someone with limited liquid assets outside the 401(k), this immediate tax bill might be prohibitive.

Second, receiving the stock in-kind forces you to hold a concentrated position in your company stock. If your employer is a single-stock holding that comprises your entire net worth, you’re taking on enormous concentration risk. A single adverse news event, management change, or industry disruption could wipe out a major portion of your wealth. With an IRA rollover, you’d diversify immediately into a mix of stocks, bonds, and other assets. NUA locks you into holding company stock until you sell it, and the psychology of selling appreciated stock you’ve held for decades can be challenging.

Third, assets held in a taxable brokerage account lose important legal protections. IRAs offer creditor protection under ERISA and federal bankruptcy law in most states. Company stock distributed to a taxable account loses this protection. If you face a lawsuit, creditor judgment, or bankruptcy, the stock in your taxable account could be at risk, whereas an IRA would be protected.

Fourth, you lose the tax-deferred growth of an IRA. Once the stock is in your taxable account, any dividends are taxable annually. Any gains you realize from selling are immediately taxable. You can’t reinvest and defer taxes on the new gains like you could in an IRA. This reduces your compounding power over time.

Fifth, NUA is irrevocable. Once you’ve elected it and distributed the stock to a taxable account, you can’t change your mind and roll it into an IRA. The tax treatment is locked in. If market conditions change or your tax situation shifts unexpectedly, you’re stuck with the NUA choice.

Sixth, depending on your income level, the Net Investment Income Tax (NIIT) may apply to your capital gains. For 2025, the NIIT threshold is $250,000 for those married filing jointly, $200,000 for single filers, and $125,000 for married filing separately. If your total income plus investment income (including long-term capital gains from selling NUA stock) exceeds these thresholds, you’ll pay an additional 3.8% tax on the gains. While still lower than ordinary income tax, this reduces the NUA advantage.

How Do You Execute NUA in Practice?

Short answer: Contact your 401(k) plan administrator, request a lump-sum distribution of employer stock in-kind, have it sent directly to your taxable brokerage account (not an IRA), and report it on Form 4972 on your tax return.

Executing NUA involves coordination among multiple parties: your plan administrator, your brokerage, and your tax preparer. Here’s the practical process:

Step 1: Confirm Eligibility with Your Plan Administrator

Contact your 401(k) plan administrator (usually your company’s HR department or the plan’s custodian like Fidelity, Charles Schwab, or Vanguard) and confirm that you have a qualifying triggering event. Provide documentation of your separation from service, age 59½ birthday, disability determination, or death of the account owner. Ask the plan administrator whether the plan permits in-kind distributions of company stock and whether it allows lump-sum distributions. Not all plans do. Some plans require you to liquidate company stock before distributing the rest of the account, which would disqualify NUA treatment.

Step 2: Request the In-Kind Distribution

Submit a formal request for a lump-sum distribution of your employer company stock. Be explicit that you want the distribution in-kind (as actual shares, not cash equivalent). Specify that you do not want the stock liquidated and you do not want a direct rollover to an IRA. You want direct transfer of the stock to your personal taxable brokerage account. Some plan administrators may resist or be unfamiliar with NUA requests; you may need to educate them or ask to speak with a supervisor. Having the IRS Notice 98-24 and IRC Section 402(e)(4)(j) cited in your request helps demonstrate that this is a legitimate IRS-authorized distribution option.

Step 3: Establish a Taxable Brokerage Account

Before the distribution is finalized, open a taxable brokerage account at a major custodian (Fidelity, Charles Schwab, Merrill Lynch, etc.) if you don’t already have one. Provide your plan administrator with the account number and transfer instructions so they can deliver the stock directly to this account. Do not have the stock sent to your address; direct transfer to a brokerage ensures proper documentation and quick settlement.

Step 4: Prepare for the Tax Bill

Calculate the ordinary income tax you’ll owe on the cost basis. Work with a tax professional to project your total 2026 tax liability, including the NUA distribution. Arrange to pay this tax bill (either through quarterly estimated tax payments, additional withholding from other income, or a lump sum in April) so you can cover it when you file your return. You don’t want to be forced to sell stock to pay taxes if the stock is in a temporary downturn.

Step 5: File Form 4972 with Your Tax Return

In the year of distribution, your plan administrator will issue Form 1099-R showing the distribution. The NUA amount should appear in Box 6, and Box 6 should not be included in the taxable amount on your return. You’ll file Form 4972 (Ordinary Gains from Lump-Sum Distributions) with your 1040 tax return to calculate the ordinary income tax on the cost basis. Your tax preparer should handle this; communicate clearly that you’ve elected NUA treatment so they report it correctly.

Step 6: Manage the Stock Going Forward

You now own the stock in your taxable account. Hold it as long as you want. When you eventually sell it (immediately or decades later), report the sale on your Schedule D (Capital Gains and Losses) showing your original cost basis and the long-term capital gains rate. The holding period for long-term capital gains treatment is measured from the date you originally purchased the stock in your 401(k), not from the date you distributed it. According to IRS Notice 98-24, the NUA is always treated as long-term capital gain regardless of the actual holding period inside the plan.

Should You Sell Your NUA Stock Right Away or Hold It?

Short answer: Hold if you believe the stock will appreciate further and you can afford the immediate tax bill; sell gradually across multiple years if you want to manage taxes, control concentration risk, or need diversification.

One of the underappreciated benefits of NUA is that you have complete flexibility over when to sell the appreciated stock. You could sell it immediately after distribution, hold it for decades, or sell it in pieces over multiple years. Each approach has different tax and financial implications.

Selling immediately locks in your current valuation and eliminates concentration risk. If you’ve just left a company where you’re no longer privy to insider information and corporate developments, selling immediately lets you diversify and reduce your exposure to a single stock. Psychologically, it’s clean and simple—you accept the long-term capital gains tax on the NUA amount and move on. For someone who’s uncomfortable with concentrated positions or worried about the stock’s prospects, this is the right choice.

Holding the stock gives you exposure to further appreciation without additional taxes in the interim. If your company stock is expected to grow significantly (for example, a young tech company or a company in a strong growth phase), holding lets you benefit from those gains while taking advantage of the long-term capital gains rate when you eventually sell. The longer you hold, the more compounding growth you can capture. However, holding a concentrated position is risky. The best companies can become the worst companies—think of any once-dominant company that fell from grace.

Selling gradually across multiple tax years is a middle ground. You could sell one-third of your position in year one, one-third in year two, and one-third in year three. This approach spreads your long-term capital gains tax liability across years and allows you to manage your overall income and stay in lower tax brackets if possible. It also lets you reduce your concentration risk gradually while maintaining some upside exposure. The downside is additional brokerage commissions and potential slippage from selling in different market conditions.

Your decision should factor in your age, your remaining working years, your financial goals, your risk tolerance, and your conviction in the company’s future. A retiree who needs stability and wants to travel freely might prefer to sell immediately and diversify. An employee of a high-growth company with genuine optimism about future performance might prefer to hold and let it compound.

Frequently Asked Questions About NUA

What is the difference between the cost basis and Net Unrealized Appreciation?

The cost basis is the original price you paid for the company stock (what was deducted from your paycheck when you bought it). Net Unrealized Appreciation is the profit—the difference between what you paid and what the stock is worth today. For example, if you paid $100 per share and the stock is now worth $200 per share, your cost basis is $100 and your NUA is $100 per share.

Can you use NUA if you’re still employed at the company?

Yes, but only if you’re age 59½ or older and your plan permits in-service distributions. If you’re under 59½ and still employed, you must wait until you separate from service to access NUA treatment. Separation from service at any age qualifies, but passive ownership or part-time work doesn’t count as separation unless your plan specifies otherwise.

What happens to NUA if you roll the stock into an IRA by mistake?

Rolling company stock into an IRA disqualifies it from NUA treatment permanently. Once the stock is in an IRA, it loses its capital gains tax benefit. All future withdrawals are taxed as ordinary income. There is no way to undo this election, so it’s critical to avoid rolling NUA stock into an IRA. Direct it to your taxable brokerage account instead.

Do you have to include the cost basis in your gross income in the year of distribution?

Yes. The cost basis is taxed as ordinary income in the year of distribution. You must have sufficient income or tax withholding to cover this tax bill. The NUA amount (the appreciation) is deferred and not taxed until you sell the stock, but the cost basis triggers an immediate tax liability. This is why you need cash on hand or must arrange payment before requesting the distribution.

Can your beneficiaries use NUA treatment if you die holding company stock in your 401(k)?

Yes. If you pass away before distributing the stock, your beneficiaries can receive the employer stock as a lump-sum distribution and benefit from NUA treatment if they meet the requirements. The distribution must be taken within one year of your death and must go to a taxable account to preserve NUA status. Your beneficiaries should consult with a tax professional to ensure proper execution.

What is the Net Investment Income Tax and how does it affect NUA?

The Net Investment Income Tax (NIIT) is an additional 3.8% tax on capital gains and other investment income for higher earners. For 2025, the NIIT applies if your modified adjusted gross income exceeds $250,000 for married couples filing jointly, $200,000 for single filers, or $125,000 for married filing separately. If you sell a large NUA position and exceed these thresholds, your long