Changing Jobs with Company Stock in Your 401(k): What to Do Before You Roll Over

When you leave a company, HR and your plan recordkeeper will walk you through one default path: roll your 401(k) into an IRA or your new employer's plan. That's almost always the right answer — for most 401(k) assets. Employer stock is different. For long-tenure employees with a large, low-basis position, rolling company stock to an IRA permanently destroys a one-time tax opportunity worth $100,000 to $300,000 or more in lifetime federal tax savings. The decision is irreversible. Here's what to know before you act.

Why company stock is different from other 401(k) assets

Index funds, bond funds, and cash inside your 401(k) are all treated identically: roll to an IRA, and growth continues tax-deferred until withdrawal, at which point everything comes out as ordinary income. That's the standard story, and it works fine for diversified holdings.

Employer stock held inside a qualified retirement plan is unique because it has a separate provision in the tax code — IRC § 402(e)(4) — that lets you bypass the ordinary-income treatment entirely for the appreciation. Specifically:

• Instead of rolling the stock to an IRA, you can take the stock as an in-kind distribution to a taxable brokerage account.
• You pay ordinary income tax on the cost basis — what the plan originally paid for the shares — at the time of distribution.
• The appreciation above cost basis (the Net Unrealized Appreciation, or NUA) is automatically treated as long-term capital gains when you sell, regardless of how long you've held the stock post-distribution.

For a position where the stock has appreciated 10x or 20x from the plan's purchase price, the cost basis is a small fraction of the current value. The tax difference between ordinary income rates (up to 37%) and long-term capital gains rates (15–23.8%) applied to the bulk of the position can be enormous.

Your four options when you leave a company

What the NUA election actually is

The NUA election means taking the employer stock out of the 401(k) "in kind" — as actual shares, not converted to cash — and depositing those shares into a taxable brokerage account. This is different from a rollover (where the plan sells the stock and transfers cash or equivalent to an IRA) or a cash-out (where the plan sells the stock and gives you a check minus mandatory withholding).

At the time of the in-kind distribution, you owe ordinary income tax on the cost basis only — the plan's historical purchase price for those shares. That amount appears in Box 2a of your 1099-R. Box 6 reports the NUA amount (total appreciation), which is excluded from current income and instead tracked as long-term capital gain when you eventually sell.

Example: long-tenure employee leaving at 58

This example uses a simplified flat bracket assumption and doesn't account for time value, state taxes, or IRMAA — a real analysis is more nuanced. But the order-of-magnitude savings is representative for a 10:1 appreciation ratio.

The irreversibility problem: once rolled, NUA is gone forever

This is the sentence HR will never say to you: if you roll employer stock into an IRA — even temporarily, even by accident — the NUA election is permanently foreclosed for those shares. There is no retroactive correction, no PLR (private letter ruling) pathway to undo it, no "whoops" exception in the statute.

Rolling even a single share of employer stock into an IRA converts that stock from a potentially 15%-taxed asset to a 37%-taxed asset. The IRS does not allow you to re-characterize an IRA rollover as an NUA distribution after the fact.

This is why the decision must be made before you initiate any distribution — ideally before you leave the company, or within the first few days, while you have time to instruct the plan administrator to process the stock as an in-kind distribution rather than a rollover.

Who should model NUA before leaving

Not everyone with employer stock in a 401(k) is a good NUA candidate. The strategy is most powerful when several conditions are true simultaneously:

• High appreciation ratio. If the stock has appreciated 4x, 8x, or 20x from the plan's cost basis, the rate differential creates significant savings. At under 2x, the ordinary income tax on the basis may cancel out the benefit. The NUA calculator will show you the breakeven ratio for your specific income level.
• Significant position size. The complexity of NUA execution, plus the one-time income spike from taxing the basis, makes the strategy most worthwhile above $250K–$300K in employer stock value. Under $100K, the dollar benefit typically doesn't justify the administrative effort.
• Moderate income expected post-distribution. If your non-stock income puts you in the 15% or 20% LTCG bracket — $49,450 to $613,700 taxable income for a married couple in 2026 — you capture the maximum benefit.² High-income retirees still benefit (23.8% < 37%), just less dramatically.
• The right plan type. Employer stock in a 401(k), profit-sharing plan, or ESOP qualifies. Stock inside a 403(b), 457(b), TSP, or SIMPLE IRA does not qualify for NUA treatment. IRS Notice 2002-3 is the governing authority.³
• Plan allows in-kind distribution. Most 401(k) plans permit in-kind distribution of employer stock, but some don't. Check your plan document before assuming NUA is available.

Separation from service: does your situation qualify?

NUA requires a "qualifying event" under IRC § 402(e)(4). Separation from service — any departure from the employer — counts as a qualifying event, regardless of the reason for leaving:

• Voluntary resignation
• Layoff or reduction in force
• Early retirement package or ERIP acceptance
• Termination for any reason
• Sale of a division or subsidiary (if your employment ends)

You do not have to be reaching traditional retirement age. A 45-year-old who resigns and has $800K of highly appreciated company stock can elect NUA on separation. (Note: if you are under 55, the 10% early withdrawal penalty applies to the cost basis — the penalty does not apply to the NUA appreciation, but it does affect the break-even math for the basis portion. See the NUA before age 55 guide for details.)

One rule that catches many employees off guard: if you are changing jobs — moving to a new employer while keeping the stock in your old plan — you must complete the NUA distribution in the same calendar year as the separation. You can't separate in 2026, leave the stock in the old plan until 2028, and then attempt NUA. The lump-sum distribution (distributing the entire balance of all accounts of the same type with that employer, in a single tax year) must occur in the triggering year or you lose the option.

Questions to ask your plan administrator before you leave

Most plan administrators aren't NUA experts. You need to lead the conversation. Before your last day — or within the first week after leaving — ask these questions in writing (email is fine):

1. "What is the cost basis of the employer stock held in my account?" The plan's per-lot purchase prices determine the NUA amount. You need this to model whether the strategy makes sense.
2. "Does the plan permit in-kind distribution of employer stock to a taxable brokerage account?" Most do; some ESOP plans don't. Get this confirmed in writing before proceeding.
3. "What is the deadline for electing an in-kind distribution versus a cash rollover?" Some plans have internal processing deadlines shorter than 60 days. Know the cutoff.
4. "Can I roll the non-employer-stock portion (index funds, bonds) to an IRA while distributing the employer stock in-kind?" Answer: yes, this is a standard partial-NUA approach, but confirm your plan can process it in the same calendar year.
5. "Will Box 6 of my 1099-R correctly reflect the NUA amount if I elect an in-kind distribution?" Recordkeepers sometimes need specific instructions to populate Box 6 accurately. Flag it early.

What to do right now

If you're leaving or recently left a company with significant appreciated employer stock in a 401(k), the sequence is:

1. Do not initiate any distribution yet. Verbal conversations with your plan are fine; do not sign distribution paperwork until you've modeled NUA.
2. Get your cost basis. Call or email the plan administrator and ask for cost-basis records on the employer stock — by lot if possible. This typically takes 2–5 business days.
3. Model the numbers. Use the NUA vs Rollover Calculator to estimate your federal tax savings at different appreciation ratios and income scenarios. Under 2x appreciation, NUA rarely pencils. Above 4x, the savings are almost always worth running a full analysis.
4. Talk to a specialist. NUA is not something to DIY if the savings are six figures. A fee-only advisor who has executed NUA distributions before will verify plan eligibility, run the full breakeven model, coordinate the execution to avoid the lump-sum disqualification traps, and help you sequence the distribution against IRMAA, Roth conversion, and Social Security planning. See how to find a fee-only NUA advisor.
5. Act before year-end. If you've already separated, ensure the full lump-sum distribution (both the in-kind stock and any rollover of the remaining balance) completes by December 31 of your separation year. Leaving either piece for January of the following year breaks the single-tax-year rule and disqualifies NUA.

Sources

1. IRS Publication 575 — Pension and Annuity Income: mandatory 20% withholding on lump-sum distributions under IRC § 3405(c), NUA rules, and 1099-R Box 6 reporting for employer stock distributions.
2. Tax Foundation — 2026 Tax Brackets: LTCG rates 0% / 15% / 20% at $49,450 / $545,501 single; $98,900 / $613,701 MFJ. Values verified for tax year 2026.
3. IRS Notice 2002-3 — Taxation of Net Unrealized Appreciation: eligible plan types (qualified plans including 401(k), profit-sharing, ESOP); excludes 403(b), governmental 457(b), IRAs, and SIMPLE plans.
4. IRC § 402(e)(4) — Net Unrealized Appreciation: statutory basis for NUA treatment, lump-sum distribution requirement, qualifying triggering events (separation from service, death, disability, age 59½), in-kind stock distribution mechanics.
5. Kitces — Net Unrealized Appreciation: lump-sum distribution mechanics, cost basis vs NUA split, disqualification traps, partial-NUA approach, and separation-from-service qualifying event rules.

Tax values verified against IRS 2026 inflation adjustments and Tax Foundation 2026 brackets as of May 2026. LTCG rates confirmed via IRS Rev. Proc. 2025-32. This page is for informational purposes only and does not constitute tax, legal, or investment advice. NUA is an irreversible election under IRC § 402(e)(4) — consult a qualified specialist before making any distribution decision.