NUA Strategy: Should Your Employer Stock Go to an IRA or a Taxable Account?

If your 401(k) holds company stock that's risen sharply since you bought it, rolling it to an IRA is not always the right call. The Net Unrealized Appreciation strategy under IRC § 402(e)(4) can permanently convert a large gain from ordinary income tax rates (up to 37%) to long-term capital gains rates (0–20%). Here's when it works — and when it doesn't.

What "Net Unrealized Appreciation" means

NUA is the difference between the current fair market value of employer stock and its cost basis inside the plan — the amount your employer contributed (or you paid) to acquire those shares. If your company contributed shares at $12 each and they're now worth $90, your NUA is $78 per share.

In a standard IRA rollover, those $78 per share of gain would be taxed as ordinary income when you withdraw them — at rates up to 37% federally. With the NUA strategy, that same gain is taxed at long-term capital gains rates: 0%, 15%, or 20% depending on your income, per IRS Rev. Proc. 2025-32.¹

How the mechanics work (the lump-sum distribution requirement)

To qualify for NUA treatment, your distribution must be a lump-sum distribution — you must distribute your entire account balance from all plans with the same employer in a single tax year. You can't cherry-pick just the stock and leave the rest in the plan.

In practice, the split-rollover looks like this:

1. Request a lump-sum distribution from your employer's plan.
2. The employer stock is transferred in-kind to your taxable brokerage account (not sold — transferred as shares).
3. The remaining non-stock balance (cash, mutual funds) is rolled directly to a traditional IRA via trustee-to-trustee transfer.
4. You pay ordinary income tax on the cost basis of the stock in the year of distribution. The NUA gain waits until you sell.

Triggering events: The lump-sum distribution must be triggered by separation from service (job change or retirement), reaching age 59½, death, or disability. Most people use this strategy at job change or retirement.

The math on a real example

Suppose you leave your job with a $900,000 401(k): $600,000 in employer stock (cost basis: $80,000) and $300,000 in diversified funds. You're in a 32% ordinary income bracket and 15% LTCG bracket, with MAGI above $250,000 MFJ (so NIIT applies).

Option A: Roll everything to an IRA

• Zero tax now. $900,000 rolls in full.
• When you eventually withdraw: 100% ordinary income. On the $600,000 stock portion, that's $600,000 × 32% = $192,000 in future federal tax (at current rates).

Option B: NUA on stock + roll the rest

• At distribution: Pay ordinary tax on cost basis only: $80,000 × 32% = $25,600.
• When you sell the stock: NUA gain = $520,000. Tax: $520,000 × (15% LTCG + 3.8% NIIT) = $97,760.
• Total tax on the stock: $25,600 + $97,760 = $123,360.
• The $300,000 non-stock portion rolls to IRA — no current tax, future ordinary income as withdrawn.

NUA advantage: $192,000 − $123,360 = $68,640 in permanent federal tax savings on the stock tranche alone, assuming immediate sale. If you hold the stock for years before selling, the advantage grows further — you're earning returns on the tax you haven't paid yet.

The tradeoff: you pay $25,600 now (at distribution) vs. nothing now with a pure rollover. That upfront cash needs to come from somewhere. But the permanent rate conversion — from 37%/32% ordinary income to 15%/20% LTCG — is why NUA can be compelling for highly appreciated stock with a low cost basis.

NUA split-rollover calculator

Enter your situation to model Option A (full IRA rollover) vs. Option B (split: NUA on stock, roll the rest).

When NUA wins

• Low cost basis (under 20–25% of market value): The less ordinary income tax you owe at distribution, the more of the rate-conversion benefit you keep. A 5% basis-to-value ratio is the sweet spot; at 50%+ the advantage shrinks quickly.
• Wide rate spread: A 37% ordinary rate vs. 15% LTCG gives 22 percentage points of permanent savings on the NUA gain. If your ordinary rate is 22%, the spread is much narrower.
• Short IRA deferral horizon: If you'll need the money within 5–7 years, the compounding benefit of continued IRA deferral is modest. NUA's rate advantage dominates.
• Backdoor Roth users: Rolling pre-tax 401(k) money into a traditional IRA triggers the pro-rata rule and contaminates future backdoor Roth conversions. NUA lets you move the appreciated stock to taxable without adding pre-tax IRA basis. This is a significant hidden benefit — see our pro-rata rule guide.
• You plan to hold the shares: This calculator assumes you sell at distribution (worst case for NUA). Holding the stock in taxable for even a few years before selling shifts the comparison further in NUA's favor — you're earning returns on the tax you haven't yet paid.

When IRA rollover wins

• High cost basis (50%+ of market value): A large ordinary income tax hit at distribution can eat most of the rate-differential savings before you even begin.
• Long deferral horizon + high LTCG + NIIT: If you have 20+ years before you'd touch the money, decades of compounding on a deferred large tax balance can outweigh the rate advantage — especially when NIIT adds 3.8% to the NUA gain.
• Low ordinary income rate at distribution: If you're in the 12% bracket in retirement, the spread between ordinary and LTCG rates is small (12% vs. 0%), making NUA unattractive.
• Concentration risk concern: An IRA rollover forces a sale of employer stock at the plan level — you get diversified immediately. NUA requires holding concentrated stock in taxable, exposing you to single-stock risk unless you sell quickly (at which point you've shrunk the NUA holding-period benefit).

The IRS rules you must get right

Lump-sum distribution (no partial NUA)

You must distribute your entire balance from all plans of the same employer in a single calendar year. A partial in-kind distribution of employer stock doesn't qualify. However, per IRS Notice 98-24,² you may distribute only the most appreciated shares in-kind (if the plan allows separate share accounting) and roll the rest to an IRA — this can dramatically improve NUA economics over distributing all shares uniformly.

Triggering events

The lump-sum distribution must be triggered by one of four events: separation from service, reaching age 59½, death, or disability. Most job-changers use "separation from service." If you're considering NUA without leaving your job, only the age-59½ trigger applies (and only after you've actually reached 59½).

10% early withdrawal penalty on cost basis

If you're under age 59½ and the triggering event is separation from service before age 55, the cost basis portion of the distribution may be subject to the 10% early withdrawal penalty. (The NUA gain is not penalized — only the cost basis.) The age-55 exception under IRC § 72(t)(2)(A)(v) applies here: if you separate from service in or after the year you reach age 55, the penalty is waived on the cost basis tranche. Confirm the triggering event timing with your plan administrator before initiating.

Holding period for additional appreciation

After the in-kind distribution, any appreciation beyond the NUA (i.e., gains that accrue after you receive the shares in the taxable account) is taxed as short-term or long-term capital gains based on how long you hold the shares post-distribution — the normal capital gains holding-period rules apply to those additional gains. The NUA gain itself is always long-term, regardless of how long you held the shares inside the plan.

NUA and the pro-rata rule: the hidden interaction

If you use backdoor Roth contributions, this matters: rolling pre-tax 401(k) money into a traditional IRA poisons the pro-rata ratio, making future backdoor Roth conversions partially taxable. The NUA strategy sidesteps this entirely — the employer stock goes to taxable, and the non-stock balance can be rolled to the 401(k) at a new employer (not to a traditional IRA), keeping your IRA clean for backdoor Roth. This is one of the most underappreciated planning benefits of the NUA split-rollover.

See our full guide: Pro-Rata Rule & Backdoor Roth.

1. IRS Rev. Proc. 2025-32 — 2026 inflation adjustments including LTCG thresholds (0%: ≤$49,450 single / ≤$98,900 MFJ; 20%: >$545,500 single / >$613,700 MFJ). Values verified April 2026.
2. IRS Notice 98-24 — clarifies that employer stock eligible for NUA treatment may be distributed in-kind based on the most appreciated shares if the plan maintains separate accounting.
3. IRC § 402(e)(4) — the statutory basis for NUA treatment; defines lump-sum distribution requirements and qualifying triggering events.
4. IRS Topic 559 — Net Investment Income Tax — confirms 3.8% NIIT rate and MAGI thresholds ($200,000 single / $250,000 MFJ; not inflation-adjusted).

Tax values verified as of April 2026 against IRS Rev. Proc. 2025-32 and IRS.gov.

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