NUA vs Rollover on $300K Company Stock: Which Wins on Taxes?

The Net Unrealized Appreciation election under IRC §402(e)(4) is one of the most powerful tax breaks in retirement distribution planning — and one of the most underused. For employees of public companies who participated in stock-match 401(k)s, ESOPs, or company stock options in the plan, NUA can save 7-15 percentage points of federal tax on the embedded appreciation in employer securities. The election is binary: get the lump-sum distribution mechanics right and capture the LTCG arbitrage on the appreciation, or trip on a technical requirement and forfeit the entire benefit.

For a 24-year employee with $300,000 of employer stock at $80,000 basis, the federal tax difference between NUA and a vanilla rollover can be $30,000-$50,000 over the retirement timeline. The mechanics matter. This article walks through the four triggering events under IRC §402(e)(4)(D), the lump-sum requirement under §402(e)(4)(B), and the dollar math at three different basis ratios.

NUA defined: what it is and how it works

Under IRC §402(e)(4), when you receive a lump-sum distribution from a qualified plan that includes employer securities, you may elect to:

• Pay ordinary income tax in the distribution year on only the cost basis of the employer stock (what the plan paid when shares were allocated to your account, not the current fair market value).
• Move the appreciated stock to a taxable brokerage account at that cost basis.
• Pay long-term capital gains tax on the appreciation since acquisition (the NUA) only when you sell the stock — using LTCG rates rather than ordinary income rates, regardless of holding period in the brokerage account.

Future appreciation after the distribution is treated like any other taxable brokerage holding: short-term capital gains if sold within 12 months of the distribution date; long-term capital gains thereafter.

The election applies only to employer securities — stock of the company or its affiliates — held in the qualified plan. It does not apply to mutual funds, target date funds, or other plan investments. It does not apply to employer stock held in an IRA (which is why direct rollover of employer stock to an IRA forfeits NUA permanently).

The four triggering events under IRC §402(e)(4)(D)

NUA is available only after one of these triggering events:

1. Separation from service: retirement, layoff, voluntary departure. The most common trigger.
2. Attainment of age 59½: for plans that allow in-service distributions to active employees over 59½. Less common, but available where the plan document permits.
3. Total and permanent disability: defined under IRC §72(m)(7) as unable to engage in substantial gainful activity by reason of physical or mental impairment that can be expected to be permanent.
4. Death: the election is available to the beneficiary or estate.

The triggering event starts the clock for the lump-sum distribution requirement: the entire plan balance must be distributed within a single tax year for any portion of the employer stock to qualify for NUA treatment.

The lump-sum distribution requirement under §402(e)(4)(B)

"Lump-sum distribution" has a specific statutory meaning: the entire balance of the qualified plan must be distributed to the recipient within one tax year. The distribution can include direct-rollover-to-IRA portions for non-employer-stock assets — only the actual receipt of the employer stock by the participant counts toward the NUA election — but the plan must be drained in that one year.

Common ways to forfeit the lump-sum requirement:

• Partial rollover across years: $200K rolled to IRA in 2026, $100K of employer stock distributed in 2027. The 2027 stock distribution does not qualify for NUA because the 2026 rollover was a non-lump-sum withdrawal.
• Prior in-service withdrawal: if you took a prior partial in-service distribution from the plan (e.g., a hardship withdrawal years ago) and have not had a subsequent triggering event since that withdrawal, the lump-sum requirement is broken. A separation-from-service event resets the clock for future eligibility.
• Rolling employer stock to IRA: once employer stock is in an IRA (rolled-over from the qualified plan), NUA is permanently forfeited. The stock has lost its qualified-plan status. This is the single most common mistake — the default brokerage paperwork treats employer stock the same as any other holding.
• Distribution to multiple recipients: if the plan splits between participant and an ex-spouse via QDRO and both receive distributions, each must independently meet the lump-sum requirement for their portion to qualify.

The exact tax math: $300K stock, three basis scenarios

The NUA advantage depends heavily on the ratio of basis to current value. Consider a 62-year-old retiring single filer with $300K of employer stock and $50K of other income (small consulting, brokerage dividends). Three scenarios based on cost basis:

Scenario A: $80K basis (27% basis ratio) — classic NUA case

NUA election: $80K of basis taxed as ordinary income in the distribution year. Total AGI 2026: $50K + $80K = $130K. Taxable: $130K - $15,750 SD = $114,250. Federal tax on $114,250 single: $11,925 × 10% + $36,550 × 12% + $54,875 × 22% + $10,900 × 24% = $1,193 + $4,386 + $12,073 + $2,616 = $20,268. (Note: this triggers IRMAA Tier 1 in 2028.) Plus when she sells the stock at $300K, $220K LTCG at 15% (in the 15% bracket because total taxable income exceeds $48,350 but is below $533,400) = $33,000. Total federal: $53,268.

Rollover scenario: $300K stays in the traditional IRA. Over 20 years, she withdraws the $300K (plus growth) at her marginal retirement rate. Assume she withdraws $20K/year from the rolled IRA from age 65 to 85 at an average marginal rate of 22%. Federal tax: 20 × $20K × 22% = $88,000. (Ignoring growth complexity for clarity.)

NUA savings: $88,000 - $53,268 = $34,732 federal.

Scenario B: $40K basis (13% basis ratio) — NUA crushes it

NUA election: $40K ordinary income. Total AGI: $90K, taxable $74,250. Federal: $1,193 + $4,386 + $5,665 = $11,244 on the basis. Plus $260K LTCG at 15%: $39,000. Total: $50,244.

Rollover: same $88,000 over 20 years at 22% blended.

NUA savings: $88,000 - $50,244 = $37,756 federal. The lower basis ratio amplifies the savings.

Scenario C: $200K basis (67% basis ratio) — rollover may win

NUA election: $200K ordinary income. Total AGI: $250K, taxable $234,250. Federal: $1,193 + $4,386 + $12,073 + $22,548 = $40,200 (24% bracket). Plus $100K LTCG at 15%: $15,000. Total: $55,200.

Rollover: $88,000 over 20 years at 22% blended.

NUA savings: $88,000 - $55,200 = $32,800 federal. Still wins, but barely — the high basis ratio compressed the savings, and the ordinary income spike on $200K basis triggered the 24% bracket plus likely IRMAA Tier 2 in 2028.

Where rollover ties or wins: if her projected retirement marginal rate is 12% (not 22%) — e.g., she has minimal other retirement income — the 20-year rollover tax drops to roughly $48,000, very close to or below the NUA outcome. The rollover-vs-NUA crossover for $300K stock occurs when basis ratio exceeds approximately 65-70% AND projected retirement marginal rate is 12% or below.

The IRMAA interaction

The NUA election year produces a large one-time spike in ordinary income (the basis recognition). For a single filer with otherwise modest income, that spike often pushes 2-year-forward Medicare premiums into IRMAA territory. Worked example: Scenario A above produced $130K of 2026 MAGI. The 2028 IRMAA threshold for single filers is $103K. The 2026 MAGI is at Tier 1 ($103K-$129K) by $1,000 over — or barely into Tier 2 in some scenarios.

Tier 1 IRMAA cost for 2028: approximately $1,050. Tier 2: approximately $2,640. The NUA election produces the spike unavoidably; the only mitigation is to coordinate with other income sources. If you can defer Social Security claiming to delay the SS-taxable-income layer, or push Roth conversions to non-NUA years, you can sometimes avoid stacking the NUA basis spike with other discretionary income.

For a NUA election large enough to land in IRMAA Tier 3+ (basis exceeds roughly $150K for single, $300K for MFJ), Form SSA-44 may not help — NUA election is voluntary, not a qualifying life-changing event. Retirement (which usually accompanies the NUA trigger) does qualify, so file SSA-44 on the work-stoppage basis even if NUA is the actual cause of the MAGI spike.

Worked example: Robert, age 64, $300K Boeing stock, $65K basis

Robert retired from Boeing at 64 after 27 years. His 401(k) contains $300K of Boeing stock at $65K cost basis (built up via the company match-in-stock program over two decades), plus $450K of mutual funds. He's married (MFJ filer), wife still works earning $80K/year. They have no other retirement income yet (he plans to delay SS to 70).

Step 1: Verify NUA eligibility

Triggering event: separation from service. Met. Lump-sum requirement: must distribute the entire $750K plan balance in 2026. Plan administrator confirms the 401(k) supports the in-kind stock distribution + cash distribution for the rest, all in one tax year. Verified in writing before initiating.

Step 2: Execute the distribution

In November 2026:

• Boeing stock ($300K, $65K basis): direct in-kind distribution to a new taxable brokerage account at Fidelity. Plan files Form 1099-R showing $65K of basis as ordinary income and $235K as NUA. Box 6 of the 1099-R is the critical disclosure of the NUA amount.
• $450K of mutual funds: direct rollover to a traditional IRA at Fidelity. No 1040 inclusion.

Step 3: 2026 tax filing

MFJ taxable income: $80K (wife's wages) + $65K (NUA basis) = $145K AGI. Taxable: $145K - $31,500 SD = $113,500. Federal tax: $23,850 × 10% + $73,100 × 12% + $16,550 × 22% = $2,385 + $8,772 + $3,641 = $14,798. IRMAA check: 2026 MAGI of $145K is well below the $206K MFJ threshold — no IRMAA impact in 2028.

Step 4: Sell strategy on the NUA stock

Robert holds the Boeing stock in the taxable brokerage. He decides to diversify over 4 years rather than sell all at once (to avoid concentration risk and spread the LTCG into multiple tax years). Each year he sells $75K of stock with proportional basis $16,250 (he tracks "specific share" basis). Gain per year: $58,750 LTCG.

With his wife retired by year 2 and Robert's SS still delayed, their MFJ taxable income drops to roughly $40-$80K/year by the LTCG sale years. At $96,700 MFJ taxable income or below (the top of the 0% LTCG bracket in 2026), the first chunk of LTCG can land at 0%. The blended LTCG rate across 4 years on the $235K of NUA: approximately 8-10% — way below the 15% maximum.

The lifetime NUA savings for Robert

NUA path total federal tax: $14,798 (2026 basis) + ~$22,000 (LTCG over 4 years at 8-10% blended) = ~$36,800.

Rollover path: $300K of stock in an IRA distributed over 20 years at 12-22% blended marginal rate. Approximate total federal tax: $300K × 18% = $54,000.

Robert's NUA savings: roughly $17,200 federal. The savings would be larger (~$30K) if his projected retirement marginal rate were 22%+ instead of 12-18%.

The position: at <30% basis ratio and $200K+ stock value, NUA almost always wins

The decision matrix simplifies into a few rules of thumb:

• NUA wins decisively: basis < 30% of value AND projected retirement marginal rate ≥ 22%.
• NUA wins narrowly: basis 30-50% of value AND retirement marginal rate ≥ 22%.
• Closer call: basis 50-65% of value, retirement marginal rate 22%.
• Rollover wins: basis > 65% of value, OR retirement marginal rate ≤ 12%.

The break-even calculation is sensitive to a few inputs you may not be sure about until you retire: projected SS claiming age, projected portfolio size at 73 (which drives RMD-era marginal rate), and state tax conformity (most states tax LTCG as ordinary income, partially eroding the NUA advantage). Run the numbers explicitly before initiating the distribution — the NUA election is final once the lump-sum distribution is processed.

Where this analysis fails

• Concentration risk: NUA forces you to hold $200K+ of single-company stock in a taxable account. If the company tanks 50% in the years after distribution, you have a $100K loss that you eat directly — whereas in the IRA, the same loss would be sheltered from any tax recognition (though it would still be a loss). Diversifying immediately by selling realizes the LTCG; the NUA savings are real only if you can hold long enough for the LTCG sale to spread across multiple low-bracket years.
• Estate planning: under IRC §1014, traditional IRA assets do not get a step-up in basis at death — beneficiaries inherit the embedded tax liability. NUA stock in a taxable account DOES get a step-up at death — the unrealized NUA above your death basis is forgiven. For wealthy retirees with charitable estates or non-spousal heirs, NUA's step-up advantage can be worth $50K-$200K+ over the long run. This often justifies NUA election even in marginal-case basis ratios.
• State tax disadvantage: most states tax LTCG as ordinary income. CA's top rate is 13.3%; NY 10.9%; OR 9.9%. In a high-tax state, the NUA's federal LTCG advantage (5-12 percentage points federal) is partially offset by state income tax on the same gain. Plan moves to no-tax states (FL, TX, NV) before selling NUA stock to capture the LTCG state savings.
• Plan administrator confusion: large plan administrators (Fidelity, Vanguard, Empower) handle NUA correctly. Small TPA administrators and some legacy ESOP plans process incorrectly — reporting full FMV as ordinary income on the 1099-R instead of just basis. If your 1099-R Box 6 doesn't match the expected NUA amount, contact the plan immediately and request a corrected 1099-R before filing.

What to do next

1. Pull your most recent 401(k) statement and identify the dollar value and cost basis of any employer securities. Cost basis is usually shown on the statement or available from the plan administrator on request.
2. Calculate the basis ratio (cost basis / current value). Under 30% is a strong NUA case; over 65% requires harder modeling.
3. Verify the lump-sum mechanics with the plan administrator IN WRITING before initiating distribution. Confirm the in-kind stock distribution path, the 1099-R reporting (especially Box 6 NUA amount), and the timing of any non-stock rollover to IRA.
4. Coordinate the NUA year with your broader tax picture: avoid stacking large Roth conversions or other discretionary income in the NUA year. If you're close to an IRMAA tier, the basis recognition alone may push you over.
5. After distribution, plan the LTCG sale strategy. Spreading sales across multiple low-bracket years can drop the effective LTCG rate to 0-10% blended, vs the 15% maximum for a single-year sale.

Key takeaways

• NUA under IRC §402(e)(4) lets you separate cost basis (ordinary income) from appreciation (LTCG) on employer stock distributed from a qualified plan. The LTCG arbitrage can save 5-15 percentage points of federal tax on the appreciation.
• Four triggering events qualify under §402(e)(4)(D): separation from service, age 59½ (if plan allows), disability, death. The lump-sum requirement under §402(e)(4)(B) demands the entire plan balance be distributed in one tax year.
• For $300K of stock with $80K basis, the federal tax savings from NUA over rollover is typically $30K-$50K, depending on retirement marginal rate and state tax conformity.
• NUA forfeits if any portion of employer stock is rolled to an IRA — the stock must distribute directly to a taxable brokerage account. The default brokerage paperwork often skips this distinction; check Form 1099-R Box 6 immediately.
• Rollover wins when basis ratio exceeds 65-70% of stock value OR projected retirement marginal rate is 12% or below. For most long-tenure employees with stock-match programs, basis ratios are in the 20-40% range, making NUA the clear choice.
• The NUA year produces an ordinary income spike (basis recognition) that often triggers IRMAA two years later. Coordinate with retirement-year work stoppage to qualify for Form SSA-44 appeal on the IRMAA surcharge.
• NUA stock in a taxable account receives step-up basis at death under IRC §1014, forgiving the embedded NUA. Rolled IRA assets do not. For estate planners, NUA's step-up advantage can be worth $50K-$200K+ over the long run.