Alt text: A financial advisor reviews a retirement portfolio showing company stock holdings and tax strategy options.

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Net Unrealized Appreciation: A Hidden Tax Break for Company Stock in Your 401(k)

If you’ve accumulated company stock inside your 401(k) and you’re approaching retirement, there’s a little-known tax strategy that could save you tens of thousands of dollars — but it requires making the right decision before you roll everything into an IRA.

Most retirement plan participants are told the same thing when they leave a job or retire: roll your 401(k) into an IRA. It’s clean, straightforward, and usually good advice. But for employees who hold significant amounts of employer stock inside their plan — especially stock that has appreciated substantially — blindly rolling everything into an IRA can mean leaving a massive tax savings on the table.

The strategy is called Net Unrealized Appreciation, or NUA. The IRS has actually built a tax break into the rules for exactly this situation, and most people never hear about it until it’s too late to use it.

NUA is consistently one of the most underused strategies in retirement planning, and most people never hear about it until it’s too late. Let me walk you through exactly how it works, when it makes sense, and how to execute it correctly.

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Table of Contents

1. What Is Net Unrealized Appreciation (NUA)?
2. How the NUA Tax Strategy Works
3. Triggering Events: When You Can Use This Strategy
4. The Lump-Sum Distribution Requirement
5. NUA vs. Rolling to an IRA: A Tax Comparison
6. When NUA Makes Sense
7. When NUA Does NOT Make Sense
8. Hypothetical Example: The Numbers in Action
9. Risks and Considerations You Cannot Ignore
10. Step-by-Step: How to Execute an NUA Distribution
11. Key Takeaways
12. Frequently Asked Questions

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What Is Net Unrealized Appreciation (NUA)? {#what-is-nua}

Net unrealized appreciation is the difference between the cost basis of employer stock in your 401(k) and the current market value of that stock at the time of distribution.

Let’s unpack that.

When your employer puts company stock into your 401(k) — through a company match, profit-sharing contribution, employee stock ownership plan (ESOP), or direct purchase — the plan records the value of those shares at the time they were contributed. That recorded value is the cost basis.

Over time, if the stock appreciates, the current market value grows well above that original cost basis. The gap between what those shares were worth when they went into the plan and what they’re worth when they come out is the net unrealized appreciation.

Here’s why this matters from a tax perspective: normally, every dollar that comes out of a traditional 401(k) is taxed as ordinary income — whether it’s contributions, employer matches, or decades of growth. The IRS treats it all the same. But the NUA rules carve out a special exception: the appreciation in employer stock can be taxed at the more favorable long-term capital gains rate instead, even if you haven’t held the stock for a year after the distribution.

That difference between ordinary income rates (currently up to 37%) and long-term capital gains rates (0%, 15%, or 20% depending on your income) is where the savings live.

Thomas’s Take: NUA isn’t a loophole or a workaround — it’s a provision deliberately written into the tax code and detailed in IRS Publication 575. The IRS is not going to remind you about it. That’s your job — and ideally your advisor’s job.

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How the NUA Tax Strategy Works {#how-nua-works}

The mechanics of NUA are specific, and getting them wrong can disqualify you from using this strategy entirely. Here is exactly how it works.

Instead of rolling your 401(k) into an IRA at retirement or separation from service, you request an in-kind distribution of your employer stock to a taxable brokerage account. “In-kind” means the shares transfer directly — you do not liquidate them first.

When those shares land in your taxable account, here’s how they are taxed:

In the year of distribution: – You pay ordinary income tax on the cost basis of the shares (what the plan paid for them). – You also owe the 10% early withdrawal penalty if you are under age 59½ and your triggering event is not an exception (more on this below). – The NUA — the appreciation above the cost basis — is not taxed at the time of distribution.

When you eventually sell the shares: – The NUA portion is taxed at long-term capital gains rates, regardless of how long you hold the shares after distribution. You do not need to hold them for a year to qualify. – Any additional appreciation that occurs after the distribution date is taxed based on normal holding period rules: short-term rates if sold within a year, long-term rates if held longer.

The critical distinction: if you had rolled those shares into an IRA, every dollar of eventual distribution — including all of that appreciation — would be taxed as ordinary income. NUA converts a portion of that tax liability from ordinary income rates to capital gains rates.

Pro Tip: The non-company-stock portion of your 401(k) can still be rolled into an IRA tax-free. You don’t have to choose between NUA and an IRA rollover — you can do both. The employer stock goes in-kind to the taxable brokerage; everything else rolls to an IRA. This is the most common execution approach in practice — the employer stock goes in-kind, everything else rolls over.

This interacts with your overall retirement account withdrawal order strategy, so it’s worth mapping out how the taxable brokerage account fits into your broader distribution plan before you pull the trigger.

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Triggering Events: When You Can Use This Strategy {#triggering-events}

NUA is not available any time you want it. The IRS requires a qualifying triggering event before you can execute this strategy. There are four:

1. Separation from Service

You leave your employer — through retirement, resignation, or termination. This is the most common triggering event. Note: this does not apply if you are self-employed.

2. Reaching Age 59½

Even if you are still working for the employer, reaching age 59½ can trigger eligibility. This matters for employees who want to execute NUA while still employed, though plan rules vary on whether in-service distributions of employer stock are permitted.

3. Disability

If you become disabled (as defined by the IRS), you may trigger NUA eligibility. This applies to all employees, including the self-employed.

4. Death

The death of the plan participant triggers NUA eligibility for beneficiaries. This can be an important estate planning consideration — see estate planning tax strategies for retirees for more on how this fits into a broader legacy plan.

Important: The triggering event rules are strict. Leaving a company and taking a partial distribution — without completing a lump-sum distribution of the entire plan — typically does not preserve your NUA eligibility. Which brings us to the next requirement.

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The Lump-Sum Distribution Requirement {#lump-sum-requirement}

This is the rule that trips people up most often, and it is non-negotiable: to use the NUA strategy, you must distribute the entire balance of the plan in a single tax year.

You cannot distribute just the employer stock and leave the rest. You cannot spread the distribution over two calendar years. The IRS requires that the complete account balance be distributed within the same tax year as the triggering event.

The IRS defines a lump-sum distribution in IRC Section 402(e)(4) as a distribution of the entire balance of the plan within one tax year following a qualifying triggering event.

Here’s how this plays out in practice: – The employer stock is distributed in-kind to your taxable brokerage account. – The remaining non-stock assets (bonds, mutual funds, other holdings) are simultaneously rolled over to an IRA. – Both actions occur in the same calendar year. – The result: you satisfy the lump-sum requirement while minimizing current tax liability.

Thomas’s Take: The lump-sum requirement is the most common reason people accidentally disqualify themselves from NUA. If you took a partial distribution from your 401(k) in a prior year after a triggering event, you may have forfeited your ability to use this strategy for the remaining balance. This is why I always tell clients: talk to your advisor BEFORE you touch the plan.

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NUA vs. Rolling to an IRA: A Tax Comparison {#nua-vs-ira-rollover}

Let’s compare the two main options side by side.

In-Article Image: Split comparison graphic — left side labeled “IRA Rollover” in Navy (#1B3A5C), right side labeled “NUA Strategy” in Gold (#C9A84C), showing tax rate differences. (800x450px) Alt text: A side-by-side tax comparison between rolling company stock into an IRA versus using the NUA strategy.

Option A: Roll Everything to an IRA

You roll the entire 401(k) — including the employer stock — into a traditional IRA. No tax is owed at the time of rollover.

When you take distributions from the IRA: – Every dollar is taxed as ordinary income. – For a retiree in the 22% or 24% bracket, the stock appreciation is taxed at that rate. – For higher earners, distributions could push them into the 32% or 37% bracket.

The IRA approach defers taxes but does not change their character. All of that appreciation remains in the ordinary income bucket forever.

Option B: NUA Distribution

You distribute the employer stock in-kind to a taxable account and roll everything else to an IRA.

• In the year of distribution: pay ordinary income tax on the cost basis only.
• When you sell: pay long-term capital gains tax on the NUA portion.
• The long-term capital gains rate is 0%, 15%, or 20% depending on your income — significantly lower than ordinary income rates for most retirees.

The NUA approach accelerates a portion of your tax liability (the cost basis) but converts the appreciation from ordinary income to capital gains. If your cost basis is low relative to the total value, the acceleration is small and the savings are large.

The comparison with Roth conversion strategies is also worth considering. In some situations, doing Roth conversions on the non-stock portion of your 401(k) while using NUA on the employer stock portion can be a powerful combination — though the timing and income impact need to be carefully modeled. Given the 2026 tax bracket changes affecting retirees, the NUA calculus may be more favorable than it was in prior years.

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When NUA Makes Sense {#when-nua-makes-sense}

NUA is not always the right move. Here are the conditions under which it tends to deliver the most value.

Large Appreciation Relative to Cost Basis

The lower the cost basis as a percentage of current value, the more tax savings NUA produces. If your employer stock has a cost basis of 20% of its current value, you’re getting an 80% conversion from ordinary income rates to capital gains rates. That’s a powerful shift.

High Current (or Future) Tax Bracket

NUA’s advantage grows with the spread between your ordinary income rate and your capital gains rate. If you’re in the 32% or 37% bracket — or expect to be due to RMDs in retirement — converting appreciation to 15% or 20% capital gains rates produces substantial savings. Review how your RMDs will affect your tax bracket, as outlined in retirement account withdrawal order.

Plan to Sell Relatively Soon

Since the NUA is taxed at long-term capital gains rates regardless of holding period, you don’t need to wait a year to capture that advantage. If you want to sell some or all of the stock in the first year of retirement to diversify, NUA still beats the IRA rollover from a tax standpoint for the appreciated portion.

Meaningful Position Size

The larger the employer stock position, the larger the potential savings. A $50,000 employer stock position with moderate appreciation might not be worth the complexity. A $400,000 position with a low cost basis almost certainly is.

Your Heirs May Benefit

If you hold the stock until death, your heirs receive a stepped-up basis on the post-distribution appreciation (not the NUA itself, which remains taxable to the estate). This intersects importantly with estate planning tax strategies for retirees.

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When NUA Does NOT Make Sense {#when-nua-doesnt-make-sense}

Small or No Appreciation

If the stock hasn’t grown significantly, there’s little NUA to convert. At that point, you’d be accelerating the cost basis taxes without much benefit in return.

Low Tax Bracket

If you’re in the 10% or 12% tax bracket in retirement, ordinary income taxes on IRA distributions may not be materially higher than your capital gains rate (which could be 0%). The spread disappears.

Want Maximum Tax Deferral

NUA requires paying taxes now on the cost basis. If your priority is minimizing current-year taxes and you have strong reasons to defer, an IRA rollover maintains full deferral.

Stock Is Expected to Decline

NUA makes most sense when you believe the stock will maintain or grow its value. If you’re uncertain about the company’s future, the concentrated position risk may outweigh the tax benefit — and the tax-loss harvesting strategies in tax-loss harvesting in retirement may be more relevant for the rest of your portfolio.

Plan Rules Don’t Allow In-Kind Distribution

Some 401(k) plans require liquidation before distribution. If your plan won’t permit an in-kind stock transfer, NUA isn’t an option regardless of your other circumstances. Check your plan documents early.

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Hypothetical Example: The Numbers in Action {#hypothetical-example}

The following is a hypothetical scenario for illustrative purposes only. It does not represent any actual client situation. Individual results will vary based on personal tax circumstances.

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Hypothetical: David, age 63, retiring from a regional manufacturing company

David has participated in his company’s 401(k) for 28 years. His plan balance:

Asset	Value
Company stock (3,000 shares)	$200,000
Other funds (bonds, mutual funds)	$320,000
Total plan balance	$520,000

Cost basis of company stock: $40,000 (the plan purchased shares over 28 years at an average of ~$13.33/share; current price is ~$66.67/share)

Net Unrealized Appreciation: $200,000 − $40,000 = $160,000

David is in the 24% federal tax bracket in retirement. His long-term capital gains rate is 15%.

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Scenario A: Roll Everything to an IRA

David rolls the full $520,000 to an IRA. No tax now.

When David later withdraws the $200,000 of company stock value from the IRA: – $200,000 × 24% = $48,000 in federal taxes

Scenario B: NUA Strategy

David takes the 3,000 shares in-kind to a taxable brokerage. Everything else rolls to an IRA.

In the year of distribution: – Ordinary income tax on cost basis: $40,000 × 24% = $9,600

When David sells the shares: – NUA portion: $160,000 × 15% = $24,000 in capital gains tax

Total tax on the $200,000: $9,600 + $24,000 = $33,600

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Tax savings from NUA strategy: $48,000 − $33,600 = $14,400

Now, if David’s bracket were higher — say 32% ordinary income and 15% capital gains — the numbers are even more compelling:

	IRA Rollover	NUA Strategy	Savings
24% ordinary / 15% LTCG	$48,000	$33,600	$14,400
32% ordinary / 15% LTCG	$64,000	$36,800	$27,200
37% ordinary / 20% LTCG	$74,000	$46,800	$27,200

Note: State income taxes are excluded from this example. State treatment of NUA varies.

Thomas’s Take: NUA savings can range from roughly $10,000 to well over $100,000 depending on position size, cost basis, and tax bracket. The strategy isn’t right for everyone, but when the conditions line up, it’s one of the most powerful levers available in a retirement plan. The strategy isn’t right for everyone, but when the conditions line up, it’s one of the most powerful levers available in a retirement plan. The key is identifying it before a rollover decision has already been made — that window closes permanently once you roll to an IRA.

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Risks and Considerations You Cannot Ignore {#risks-and-considerations}

Concentrated Single-Stock Risk

After the in-kind distribution, you own a concentrated position in a single company’s stock in a taxable account. If that company has a bad year — or a bad quarter — your retirement security is exposed. Many people in this situation choose to sell the stock gradually over several years to manage both the concentration risk and the tax impact of selling.

The Decision Is Irreversible

Once you execute a rollover to an IRA, the NUA opportunity is gone. You cannot undo a rollover and redistribute the shares in-kind. This is a one-time, one-direction decision at the moment of plan distribution.

Triggering a Large Ordinary Income Tax Bill in Year One

Even though the NUA itself is taxed at capital gains rates, you still pay ordinary income tax on the cost basis in the year of distribution. Depending on the size of that cost basis, this could push you into a higher bracket or create estimated tax obligations. Plan for this with your tax advisor well in advance.

Medicare IRMAA Surcharges

A large distribution year can spike your Modified Adjusted Gross Income, triggering Income-Related Monthly Adjustment Amount (IRMAA) surcharges on Medicare Part B and Part D premiums two years later. This is a commonly overlooked side effect of NUA executions.

Net Investment Income Tax (NIIT)

If your income exceeds $200,000 (single) or $250,000 (married filing jointly), the NUA gain when sold may be subject to the 3.8% Net Investment Income Tax in addition to the capital gains rate. Factor this into your tax projections.

Death and Estate Tax Considerations

NUA is income in respect of a decedent (IRD) — it retains its income tax character for heirs. Unlike most inherited assets, heirs do not get a stepped-up basis on the NUA portion. Only post-distribution appreciation gets the step-up. This is an important nuance for estate planning.

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Step-by-Step: How to Execute an NUA Distribution {#step-by-step-execution}

If you’ve determined that NUA makes sense for your situation, here is the general execution sequence. This process must be coordinated carefully with your financial advisor, tax professional, and plan administrator.

Step 1: Verify Your Cost Basis Contact your 401(k) plan administrator and request the cost basis of your employer stock. This figure is critical — without it, you cannot calculate the NUA or make an informed decision. Some plans track this easily; others may require research.

Step 2: Confirm a Triggering Event Has Occurred Make sure you have a qualifying event: separation from service, age 59½, disability, or death of the participant. Document it.

Step 3: Review the Plan Document Confirm that your plan permits in-kind distribution of employer stock to a taxable account. Not all plans do. Also confirm there are no waiting periods or restrictions.

Step 4: Open a Taxable Brokerage Account Before initiating the distribution, open a taxable brokerage account at the custodian where you want the shares delivered. Ensure the account can receive in-kind stock transfers.

Step 5: Initiate the Distribution Request Work with your plan administrator to request: – In-kind distribution of employer stock to your taxable brokerage account – Direct rollover of all other plan assets to your IRA Both should occur in the same calendar year.

Step 6: Verify the Transfer Confirm the shares have landed in your taxable account as shares — not as a cash liquidation. If the plan liquidated the shares before transferring, the NUA treatment may be lost. Contact the plan immediately if this happens.

Step 7: Plan for Estimated Taxes In the year of distribution, you’ll owe ordinary income tax on the cost basis. Make estimated tax payments to avoid underpayment penalties.

Step 8: Work With a CPA at Tax Time Your 1099-R from the plan will report the distribution. The NUA amount should be reported in Box 6 of the 1099-R. Make sure your tax preparer understands NUA treatment — it is not automatically handled correctly by all tax software or all preparers.

Step 9: Develop a Sell Strategy for the Shares Decide in advance how you will manage the concentrated position — whether selling immediately, gradually over several years, or holding long term. Factor in capital gains, NIIT, IRMAA, and your overall income picture.

Pro Tip: If your 1099-R does not have an amount in Box 6, follow up with your plan administrator. Missing NUA figures on the 1099-R are not uncommon, and it is your responsibility (with your advisor and CPA) to ensure the reporting is correct.

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Key Takeaways {#key-takeaways}

• NUA converts appreciation from ordinary income rates to long-term capital gains rates. For employer stock that has grown significantly, this difference can mean tens of thousands in tax savings at retirement.

• You must distribute the entire plan balance in one tax year to qualify for NUA treatment. Partial distributions or multi-year distributions disqualify the strategy.

• The NUA decision is irreversible. Once employer stock is rolled into an IRA, the special tax treatment is permanently lost. This conversation must happen before any distribution or rollover decision is made.

• NUA makes the most sense when the cost basis is low, the appreciation is large, and you are in a higher tax bracket. The larger the spread between ordinary income rates and capital gains rates, the more valuable the strategy.

• Concentrated stock risk is real. Even the most favorable NUA scenario doesn’t justify holding a dangerously concentrated single-stock position indefinitely. Build a transition plan to diversify over time in a tax-efficient way.

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Frequently Asked Questions {#faq}

Can I use NUA if I’m still working for the company?

In some cases, yes — if you’ve reached age 59½ and your plan permits in-service distributions of employer stock, age 59½ is a qualifying triggering event. However, many plans restrict in-service distributions. Check your plan document or contact your HR/benefits department to confirm.

What if my plan has both company stock and other investments — do I have to distribute it all?

Yes. The lump-sum distribution requirement means you must distribute the entire plan balance in a single tax year. However, you have flexibility in how each piece is handled: employer stock goes in-kind to a taxable account; everything else can be rolled over to an IRA or Roth IRA. You are not required to take cash distributions on the non-stock portion.

Does NUA apply to Roth 401(k) accounts?

No. NUA rules apply only to pre-tax (traditional) qualified plan accounts. Because Roth 401(k) distributions are already potentially tax-free, the NUA mechanism doesn’t apply.

What does the IRS say about NUA?

NUA rules are governed by IRC Section 402(e)(4) and detailed in IRS Publication 575, Pension and Annuity Income. Publication 575 covers the requirements for lump-sum distributions, the treatment of NUA, and the reporting on Form 1099-R.

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Ready to Find Out If NUA Is Right for Your Situation?

NUA is one of those strategies where the timing of the conversation matters enormously. Once you’ve rolled your 401(k) to an IRA, the door is permanently closed. If you’re within five years of retirement — or currently making a job transition — it’s worth a dedicated conversation now.

I offer a 30-minute planning call where we can quickly assess whether NUA applies to your situation, run through the basic numbers, and help you understand your options before you make any irreversible decisions.

For more on retirement income, bucket planning, and Social Security claiming, browse the retirement planning archive or sign up for the weekly newsletter at the bottom of any page.

There’s no obligation and no sales pitch — just a focused conversation about whether this strategy belongs in your retirement plan.

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This article is published by Confluence Media Group LLC, an independent publisher of educational financial content. Thomas Clark is a Series 65 Investment Advisor Representative. The information provided is for educational and informational purposes only and is not personalized financial, tax, or legal advice. Past performance does not guarantee future results. All investing involves risk, including potential loss of principal. Consult a qualified professional before making financial decisions.

Confluence Media Group LLC is a separate entity from Confluence Capital Management, the investment advisory practice through which Thomas Clark provides advisory services. Advisory services are not offered through this publishing platform.

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