Net Unrealized Appreciation (NUA): The 401(k) Tax Strategy That Saves Executives Six Figures

If you've spent a career at a company that offered employee stock in your 401(k), profit-sharing plan, or ESOP, you likely have a significant amount of appreciated employer stock sitting inside that plan — and a decision to make at retirement or separation. Most people roll everything into an IRA, which is almost always the right call for mutual funds and diversified assets. But for employer stock with a low cost basis and large unrealized gains, the Net Unrealized Appreciation (NUA) strategy under IRC § 402(e)(4) can dramatically reduce lifetime taxes by converting what would be ordinary income into long-term capital gains.

What is Net Unrealized Appreciation?

Net Unrealized Appreciation is the difference between what your employer's qualified retirement plan paid for company stock on your behalf (the cost basis) and the stock's fair market value (FMV) at the time of distribution. Under IRC § 402(e)(4) and IRS Notice 98-24, when employer stock is distributed in-kind from a qualified plan as part of a lump-sum distribution, the NUA portion receives permanent long-term capital gains (LTCG) treatment — regardless of how long the stock was held inside the plan.

The NUA tax split:
• Cost basis — taxed as ordinary income in the year of distribution (up to 37% federal in 2026)
• NUA — excluded from income at distribution; taxed as long-term capital gains when you eventually sell (0%, 15%, or 20% federal)
• Post-distribution appreciation — taxed as LTCG if you hold the shares more than one year after distribution; short-term rates if sold within one year

For a high-net-worth executive, converting a large appreciated stock position from 37% ordinary income to 23.8% LTCG (20% federal + 3.8% NIIT) can be worth $100,000–$500,000+ in lifetime tax savings.

Who qualifies for NUA treatment?

Qualifying plan types

The NUA rules apply to employer stock held in:¹

401(k) plans
Employee Stock Ownership Plans (ESOPs)
Profit-sharing plans
Stock bonus plans

IRAs do not qualify. If you rolled employer stock into an IRA at a prior job change, the NUA benefit has been permanently forfeited — IRA distributions are always ordinary income regardless of what's inside the account.

Triggering events

To take a qualifying lump-sum distribution, you must have experienced one of four triggering events:¹

Separation from service — retirement, termination, or voluntary departure
Reaching age 59½ — even while still employed
Death — distributions to beneficiaries
Disability — as defined under IRC § 72(m)(7)

The lump-sum distribution requirement

This is the most commonly misunderstood requirement. A qualifying lump-sum distribution means the entire account balance from all of the employer's qualified plans must be distributed within a single tax year. You cannot cherry-pick just the employer stock — you must distribute everything from all 401(k)s, profit-sharing plans, and stock bonus plans your employer sponsors.¹

In practice: you take the employer stock as an in-kind distribution to a taxable brokerage account, and roll all remaining plan assets (cash, other investments) into a traditional IRA. This clears the account in full, satisfying the lump-sum requirement, while keeping the non-stock assets tax-deferred.

Interactive NUA vs. IRA Rollover calculator

This models after-tax wealth at the point you sell the NUA shares, comparing the NUA strategy against rolling everything into an IRA. The NUA approach requires paying ordinary income tax on the cost basis now; the IRA approach defers all taxes but at ordinary income rates. Assumes deferred-gain tax is paid at retirement from outside funds.

FMV of employer stock at distribution ($)

NUA amount — from Form 1099-R Box 6 ($)

Expected annual appreciation of stock after distribution (%)

Years until you sell the NUA shares

Current ordinary income tax rate, federal + state (%) — applies to cost basis

Your LTCG rate, federal + state (%) — applies to NUA and gains

Expected ordinary income rate at IRA distribution, federal + state (%)

Item	NUA approach	Full IRA rollover
Cost basis (ordinary income, paid now)	—	—
NUA taxed as LTCG (at sale)	—	—
Post-distribution appreciation tax (at sale)	—	—
IRA distribution tax (ordinary income at yr N)	—	—
Total taxes	—	—
After-tax wealth at year N	—	—

When NUA beats the IRA rollover

The NUA strategy wins when the LTCG rate differential — the spread between your ordinary income rate and your long-term capital gains rate — is wide enough to overcome the cost of paying tax on the cost basis now rather than later. Four factors drive the outcome:

Factor	Favors NUA	Favors IRA rollover
Cost basis vs. NUA ratio	Low basis (large NUA, small ordinary income trigger)	High basis (large ordinary income hit, small NUA)
Current vs. retirement tax rates	Lower effective rate now; same or higher in retirement	Meaningfully lower rate expected in retirement
State tax on NUA	No-tax or low-tax state (FL, TX, WA, NV)	High-tax state that taxes NUA at ordinary income rates (CA, NY)
Estate plan intent	Plan to hold shares; heirs benefit from step-up in basis	Charitable beneficiary for IRA (avoids ordinary income tax entirely)

Rule of thumb: NUA is compelling when your cost basis is less than 25–30% of the FMV at distribution. At a 10% basis ratio (e.g., $200K basis on a $2M position), the ordinary income tax hit is relatively small against a massive LTCG conversion. At a 70% basis ratio, you're paying heavy ordinary income tax now for a modest NUA benefit.

The early withdrawal penalty: what applies and what doesn't

The 10% early distribution penalty (IRC § 72(t)) applies only to the cost basis portion of the NUA distribution — the amount included in ordinary income. The NUA portion itself is not subject to the 10% penalty under any circumstance.²

The penalty on the cost basis is waived if:

You are age 59½ or older at the time of distribution
You separated from service at or after age 55 (the "Rule of 55" under IRC § 72(t)(2)(A)(v)) — note this does not apply to separation before age 55 even if you delay the distribution to age 55
Distribution due to death or disability

For most executives executing NUA as part of a planned retirement at or after age 55, the penalty is a non-issue. For younger executives who separated mid-career and are now evaluating a prior employer's 401(k), the 10% penalty on the cost basis portion may apply and should be factored into the analysis.

The estate planning angle: a benefit most executives overlook

One of the least-publicized advantages of the NUA strategy is how it interacts with estate planning at death. When employer stock has been distributed to a taxable account, those shares are ordinary taxable property — not IRD (income in respect of a decedent). At death, they receive a step-up in basis to fair market value under IRC § 1014.

This means: if you hold your NUA shares until death and your heirs sell immediately, the NUA gain and any post-distribution appreciation are both permanently eliminated — zero capital gains tax.

At death, what do heirs receive?	NUA shares (taxable account)	Traditional IRA
Tax treatment to heirs	Step-up in basis to FMV; heirs pay LTCG only on appreciation after death	IRD — ordinary income tax on every dollar distributed, no step-up
Federal rate on $2M position	0% if sold immediately after step-up	Up to 37% on full distribution value
Estate tax inclusion	Yes (FMV at death)	Yes (FMV at death)

This step-up benefit is especially powerful for executives who plan to hold the employer stock long-term anyway — perhaps they believe in the company's trajectory or have psychological attachment to the shares. The NUA distribution converts what would be fully IRD inside an IRA into ordinary taxable property with step-up eligibility. Combined with a comprehensive estate plan, this can be the difference of hundreds of thousands of dollars in taxes across generations.

Planning note: The NUA shares' charitable giving potential is different from an IRA's. Donating appreciated NUA shares to a donor-advised fund or charitable remainder trust eliminates the LTCG on the donated shares and generates a charitable deduction — similar to donating any appreciated stock. An IRA, by contrast, is better left to a charitable beneficiary directly (the charity pays no income tax on the distribution). The right charitable vehicle depends on which assets you're holding — NUA shares vs. IRA balance — and your charitable intent.

Interaction with Roth conversions and income planning

The cost basis portion of an NUA distribution — the amount reported as ordinary income — stacks on top of all other ordinary income in the distribution year. At HNW income levels, this has several downstream effects:

IRMAA exposure: A large cost basis distribution can push MAGI above IRMAA thresholds, triggering Medicare surcharges for two years. At $500K+ MAGI (MFJ), the top IRMAA tier adds $628.90/month per person to Part B premiums. Coordinate with your IRMAA planning strategy.
Roth conversion headroom: The distribution year is generally a bad year for large Roth conversions — the cost basis income fills the lower brackets. Plan NUA distributions in years where other ordinary income is low. See the Roth conversion strategy guide.
QBI phase-out: If you have business income qualifying for the 23% QBI deduction (OBBBA), a large ordinary income spike can push MAGI above the phase-out thresholds.
AMT: Under the OBBBA, the AMT exemption phases out at $1M MAGI (MFJ) at a 50% rate. A large NUA cost-basis distribution may intersect with this threshold for executives already in AMT territory.

The ideal NUA distribution year has: relatively low other W-2/business income, sufficient room under IRMAA cliffs, no Roth conversion planned, and no large business asset sale. For many executives, the year of retirement or the first year after is the natural window — W-2 income drops, and retirement income hasn't fully started.

State income tax on NUA: a critical variable

Most states do not conform to the federal NUA treatment. They tax the entire distribution — including the NUA amount — as ordinary income in the distribution year, erasing one of the primary benefits of the strategy.³

Key state-specific notes:

California, New York, New Jersey, Massachusetts, Oregon: NUA is taxed as ordinary income at distribution. The federal/state rate differential is significant — CA top rate is 13.3%, NY 10.9%. This can dramatically reduce or eliminate the NUA advantage.
Florida, Texas, Nevada, Washington, Wyoming, South Dakota: No state income tax. NUA strategies are most powerful for residents of these states.
Domicile change + NUA: If you're planning to relocate to a no-tax state anyway (see the state income tax planning guide), coordinating the NUA distribution with a completed domicile change can compound the savings significantly.

How to execute an NUA distribution

The mechanics require coordination with your plan administrator and receiving brokerage well in advance of the tax year you intend to execute:

Confirm cost basis. Request documentation of the cost basis per share from your plan administrator. This is often the average cost basis across all employer contributions — not the current FMV. This number appears on Form 1099-R, Box 5 (employee contributions) and Box 6 (NUA).
Identify all plans of the same employer. The lump-sum requirement covers all qualified plans from the same employer. Confirm whether you have multiple plan accounts (pension, profit-sharing, ESOP) and include them all.
Open a taxable brokerage account. The employer stock must be distributed in-kind to a taxable account — not sold inside the plan. A direct transfer of shares preserves the NUA treatment. If the plan sells the shares before distribution, NUA treatment is forfeited.
Initiate a partial rollover + in-kind distribution. Direct the plan to (a) transfer remaining non-stock assets to a traditional IRA via direct rollover and (b) distribute the employer stock in-kind to your taxable brokerage account — all in the same tax year.
File correctly. Report the cost basis as ordinary income. The NUA (Box 6 on Form 1099-R) is not taxable at distribution; your CPA should ensure it is excluded from ordinary income and tracked as a future LTCG event.

How a fee-only advisor helps

The NUA decision requires modeling that most wirehouse advisors don't offer — partly because they prefer the IRA rollover (a larger, continuously managed AUM account) and partly because the analysis requires coordination with your CPA and estate attorney. A fee-only wealth advisor who works with HNW executives should:

Model the after-tax wealth comparison across multiple scenarios (different holding periods, state tax assumptions, estate outcomes)
Coordinate the distribution year with Roth conversion timing, IRMAA exposure, and other income events
Evaluate whether the NUA shares should be held, gradually sold, donated, or structured into a CRT or DAF
Advise on concentrated-position risk if the NUA position is large relative to total investable assets — see the concentrated stock diversification guide

For executives with $1M+ of appreciated employer stock in a 401(k), failing to evaluate the NUA strategy before rolling everything to an IRA is one of the most common and costly planning oversights we see at HNW scale.

Values verified as of May 2026. NUA rules governed by IRC § 402(e)(4) and IRS Notice 98-24 (rules unchanged). 2026 LTCG rates: 0% (up to $98,900 MFJ), 15% (up to $583,750 MFJ), 20% above — per IRS Rev. Proc. 2025-32. NIIT 3.8% above $250,000 MFJ (IRC § 1411; threshold not inflation-adjusted). 2026 ordinary income top rate 37% (above $751,600 MFJ per IRS Rev. Proc. 2025-32). State NUA conformity varies; California, New York, and most other high-tax states do not conform. Consult a tax professional before executing an NUA distribution.