With employer stock in retirement plans regularly accumulating significant unrealized gains — particularly for employees at large regional companies like DuPont and other major corporate employers — understanding the tax treatment of net unrealized appreciation (NUA) can be one of the most consequential decisions in a corporate executive's financial plan. This article explains what NUA is, who may qualify, how the mechanics work, and when it might make sense compared to a standard IRA rollover.

Note: This article was originally published in January 2021 and has been substantially expanded. Tax law is complex and changes over time. Nothing here constitutes tax advice. Always work with a qualified tax professional before making any distribution or election decisions involving employer stock.

What Is Net Unrealized Appreciation?

Net unrealized appreciation refers to the difference between the current fair market value of employer stock held inside a qualified retirement plan — such as a 401(k) or ESOP — and the plan's original cost basis in those shares (what the plan paid for them, including any employer contributions attributed to your account).

For example: if your 401(k) holds shares of employer stock with a plan cost basis of $40,000 but a current market value of $200,000, the NUA is $160,000. Under ordinary rollover treatment, that entire $200,000 would eventually be taxed as ordinary income when distributed from an IRA. The NUA election offers a different path: only the $40,000 cost basis is taxed as ordinary income at the time of distribution — the $160,000 of appreciation may be eligible for long-term capital gains tax rates when the shares are eventually sold, regardless of how long you hold the shares after distribution.

This distinction — ordinary income rates on the basis, long-term capital gains rates on the NUA — is the core of what makes this strategy worth evaluating for executives with highly appreciated company stock in a qualified plan.

Who May Qualify for NUA Treatment?

Not everyone with employer stock in a retirement plan is eligible to elect NUA treatment. The IRS requires that the distribution meet the definition of a lump-sum distribution from a qualified plan. That generally means:

  • A triggering event has occurred. Qualifying triggers include: separation from service (leaving the company), reaching age 59½, death, or disability. For corporate executives departing a large employer, separation from service is the most common trigger.
  • The entire account balance is distributed in a single tax year. You must take the full balance of all accounts with that employer in one calendar year — not just the employer stock portion. Partial distributions generally do not qualify.
  • Employer stock is distributed in-kind. The employer stock must be distributed as actual shares — not liquidated and paid out as cash — and then transferred to a taxable (non-retirement) brokerage account.

For corporate executives at companies with employer stock in 401(k) or profit-sharing plans — common among large regional employers across the Mid-Atlantic region — these conditions are often met at retirement or upon a voluntary separation. Our corporate executive financial planning work frequently involves evaluating whether an NUA election is appropriate at the point of a job transition or retirement.

How the NUA Election Works: Mechanics at Distribution

When the conditions above are met and you elect NUA treatment, here is how the tax mechanics generally work:

  1. The employer stock is distributed in-kind to a taxable brokerage account. You receive actual shares, not cash.
  2. The cost basis — what the plan paid for the shares — is taxed as ordinary income in the year of distribution. This is unavoidable. The IRS requires you to recognize the plan's cost basis as ordinary income upon distribution, regardless of whether you sell the shares or hold them.
  3. The NUA (appreciation above cost basis) is not taxed at distribution. The $160,000 NUA in our example above is not included in ordinary income when the shares are distributed. It sits untaxed until you sell.
  4. When you sell the shares, the NUA is taxed at long-term capital gains rates — currently a maximum of 20% for most high-income taxpayers (plus the 3.8% Net Investment Income Tax if applicable) — regardless of how long you held the shares after distribution. The IRS treats NUA gain as automatically long-term.
  5. Any appreciation above the value on the distribution date is taxed based on your actual holding period after distribution. If the stock continues to rise after you receive it, gains beyond the NUA are subject to short- or long-term capital gains rules based on how long you hold after distribution.

The potential benefit: the spread between your marginal ordinary income tax rate (which could be 32%, 35%, or 37% for executives) and the long-term capital gains rate (0%, 15%, or 20% depending on income) applied to the NUA can represent meaningful tax savings — but only if your situation makes the trade-offs acceptable.

Lump-Sum Distributions and 10-Year Averaging

A related concept that sometimes intersects with NUA planning is the 10-year income averaging election for lump-sum distributions. This special tax calculation, available to certain plan participants born before January 2, 1936, allows the ordinary income portion of a lump-sum distribution to be taxed using 1986 tax rates applied to one-tenth of the distribution at a time — potentially reducing the ordinary income tax burden on the cost basis portion.

Because eligibility for this provision is limited (it is specifically tied to birth year), and its interaction with NUA elections involves several technical requirements under IRC Section 402(e), we would encourage anyone considering this combination to work closely with a tax advisor familiar with qualified plan distributions. The rules are narrow, the calculations are technical, and the benefits vary significantly by individual circumstance. If you were born after January 1, 1936, this provision generally does not apply to you.

NUA vs. Rolling Over to an IRA: Trade-Offs to Evaluate

The most common alternative to an NUA election is rolling the entire 401(k) — including the employer stock — into a traditional IRA. That keeps everything tax-deferred, and you pay no tax at the point of distribution. It is the simpler, lower-friction path for most people. The NUA election is worth considering when specific conditions make it potentially advantageous.

Factors that may favor an NUA election:

  • The NUA (unrealized gain) is large relative to the cost basis — the greater the spread, the more tax-rate differential you can capture.
  • Your current marginal ordinary income tax rate is meaningfully higher than your expected long-term capital gains rate.
  • You do not expect your capital gains rate to rise significantly by the time you plan to sell the shares.
  • You can absorb the immediate ordinary income tax hit on the cost basis without undue financial strain.
  • You have near-term plans to sell or diversify the stock (the capital gains treatment only helps if you eventually sell).

Factors that may favor a rollover instead:

  • The cost basis is high relative to the current market value — meaning the NUA is modest and the tax-rate benefit is limited.
  • You want to continue deferring taxes as long as possible and do not need liquidity from the stock soon.
  • The stock represents a large concentration risk you are not prepared to manage in a taxable account.
  • You intend to leave the stock to heirs. Assets in a taxable brokerage account receive a step-up in cost basis at death — but the NUA portion does not receive a step-up. Shares distributed via NUA election and held until death will still be subject to capital gains tax on the NUA when eventually sold by heirs. By contrast, assets in an IRA passed to heirs are taxed as ordinary income when distributed — a different but sometimes preferable trade-off depending on estate planning goals.
  • State income tax: some states tax NUA differently than the federal treatment. Confirm your state's rules.

There is no universal answer. The right choice depends on your cost basis, the size of the NUA, your income in the distribution year, your estate planning intentions, your need for diversification, and your long-term tax projections. Our private tax advisory team models these scenarios individually for each client — because the numbers rarely tell the same story twice.

Common Mistakes with NUA Elections

Because the rules are precise and the window for election is narrow, mistakes can be costly and sometimes irreversible. Here are the errors we see most often:

  • Taking a cash distribution instead of an in-kind stock distribution. If the plan liquidates the employer stock and distributes cash, the NUA opportunity is lost. The shares must be moved in-kind to a taxable brokerage account.
  • Failing to distribute the entire account balance in one tax year. A partial distribution typically disqualifies the lump-sum treatment. All accounts under that employer's plan must come out in the same calendar year.
  • Missing the triggering event requirement. Simply reaching age 59½ while still employed may qualify, but reaching 55 on separation (the rule-of-55 for penalty avoidance) does not automatically confer NUA eligibility — the rules are distinct. Confirm with a tax advisor.
  • Rolling the stock into an IRA first, then reconsidering. Once employer stock is rolled into an IRA, the NUA opportunity is eliminated. There is no correcting this after the fact.
  • Ignoring the ordinary income tax hit on the cost basis. The tax on the cost basis is due in the year of distribution. For executives with large plan balances and high cost bases, this can be a substantial tax bill. Failing to plan for it — or taking the distribution in a high-income year without modeling the total tax impact — can offset or eliminate the benefit.
  • Overlooking concentrated stock risk. Moving a large block of a single stock into a taxable account creates concentration risk. The NUA tax benefit only materializes if the stock holds its value. A sharp decline after distribution could wipe out the tax savings and more.
  • Not accounting for the step-up-in-basis trade-off for estate planning. As noted above, NUA shares do not receive a full step-up in basis at death. For clients with significant estate planning goals, this trade-off requires careful analysis.

Frequently Asked Questions

Does NUA treatment apply to all employer stock in my 401(k), or only stock my employer contributed?

NUA treatment can apply to employer stock regardless of whether it was contributed by the employer or purchased with your own salary deferrals inside the plan — as long as the stock is employer stock of the plan sponsor and the lump-sum distribution rules are met. The plan's cost basis for each share determines how much NUA exists. Your plan administrator can provide the cost basis figure, which is reported on IRS Form 1099-R at distribution.

What is the tax rate on NUA when I sell the shares?

The NUA portion of the gain is taxed at long-term capital gains rates in the year you sell the shares, regardless of how long you hold them after distribution. For 2024, long-term capital gains rates are 0%, 15%, or 20% depending on your taxable income. High earners may also owe the 3.8% Net Investment Income Tax on top of the capital gains rate. Any additional appreciation above the NUA that accrues after distribution is taxed based on your actual holding period post-distribution.

Can I avoid the 10% early withdrawal penalty on an NUA distribution?

The 10% penalty on the ordinary income portion (the cost basis) may be avoided if the distribution qualifies as a lump-sum distribution following a triggering event such as separation from service after age 55, or reaching age 59½, or other qualifying exceptions. The NUA portion itself — the appreciation — is not subject to the 10% penalty even if you are under 59½ at distribution. As always, confirm the specific penalty exception rules with a tax advisor for your situation.

What happens to the NUA if I hold the shares until I die?

This is an important estate planning consideration. Unlike most appreciated assets in a taxable account, NUA shares do not receive a full step-up in cost basis at death. The NUA portion remains taxable to your heirs when they eventually sell. The additional appreciation above the NUA date-of-distribution value does receive a step-up. This means NUA treatment can be less advantageous for clients whose primary goal is to pass appreciated shares to heirs. Estate planning and NUA elections should be evaluated together.

How is NUA reported on my taxes?

Your plan administrator will issue IRS Form 1099-R showing the distribution. Box 6 on Form 1099-R reports the NUA amount. The cost basis portion is included in your ordinary income for the year of distribution. When you eventually sell the shares, you report the NUA gain (and any additional appreciation) on Schedule D. Working with a CPA or tax advisor experienced in qualified plan distributions is strongly recommended — errors in reporting are common and can be difficult to unwind.

Working with Brandywine Oak on NUA Planning

NUA planning sits at the intersection of qualified plan rules, income tax strategy, estate planning, and investment management — which is precisely why it benefits from coordinated, comprehensive advice rather than a single-dimensional analysis. At Brandywine Oak Private Wealth, our team works closely with corporate executives to model NUA scenarios in the context of their full financial picture: retirement income needs, tax projections, concentration risk, and estate goals.

If you are approaching a retirement or job transition and hold appreciated employer stock in a qualified plan, we encourage you to explore this with a qualified advisor before making any irrevocable distribution decisions. The window to elect NUA treatment opens — and closes — at the point of distribution. Once shares are rolled into an IRA, the opportunity is gone.

Learn more about how we work with corporate executive financial planning clients, or connect with our private tax advisory team to discuss your specific situation.