What Is Net Unrealized Appreciation (NUA) on Company Stock in My 401(k)?
Last reviewed: July 2026
Net unrealized appreciation (NUA) is an IRS rule that lets you pay long-term capital gains rates on the growth of company stock distributed from your 401(k), instead of ordinary income tax on the full value. You pay ordinary income tax only on the original cost basis of the shares in the year you move them out of the plan; the appreciation sits in a taxable brokerage account until you sell, then gets the lower capital gains rate. For long-tenured employees whose company stock has run up inside a retirement plan, NUA is one of the more undervalued tools the tax code makes available.
On This Page
- Key Takeaways
- What Is Net Unrealized Appreciation, and How Does It Work?
- Who Qualifies for the NUA Tax Strategy?
- When Does the NUA Election Actually Save You Money?
- How Do You Execute an NUA Distribution Without Disqualifying It?
- What Are the Common NUA Mistakes That Cost People Money?
- Related Topics Worth Reading
- Frequently Asked Questions
- Putting NUA on Your Tax-Planning Checklist
- Disclosures
Key Takeaways
- The NUA strategy lets you pay long-term capital gains rates on the appreciation of company stock distributed from a 401(k), rather than ordinary income tax.
- You owe ordinary income tax only on the cost basis the year you take the in-kind distribution; the gain stays untaxed until you actually sell shares.
- The election requires a qualifying lump-sum distribution: a complete payout of the plan within one tax year, triggered by separation from service, age 59½, death, or disability.
- In 2026, long-term capital gains are taxed at 0% for taxable income up to $49,450 single or $98,900 married filing jointly, per IRS Rev. Proc. 2025-32.
- NUA is irreversible once the stock leaves the plan, so the cost-basis-to-fair-market-value ratio has to clear the math before you act.
About the Author: Jeff Judge, CFP®, AEP®, ChFC®, CLU® is Managing Partner of Chesapeake Financial Planners in Forest Hill, Maryland. He has been advising families and business owners in Harford County and the Baltimore metro area on retirement-plan distributions and concentrated-stock decisions since earning his CFP® certification in 2013, by using Chesapeake Financial Planners’ signature process, the R.U.D.D.E.R. method™. In Jeff's experience, NUA is one of the most consistently overlooked tax breaks on the books for clients who held company stock through a long career.
What Is Net Unrealized Appreciation, and How Does It Work?
Net unrealized appreciation refers to the gain on employer stock inside a qualified retirement plan, measured from the cost basis at the time of contribution to the fair market value at the time of distribution. The IRS treats that gain differently from any other 401(k) money. Instead of taxing the full distribution as ordinary income, it lets you separate the basis from the appreciation and tax them at two different rates.
Here is how the mechanics work in practice. A software engineer joined a public company in 2002, took the company-stock match for two decades, and now sits on $800,000 of employer shares with a $120,000 cost basis. If she rolls the whole 401(k) into a traditional IRA, the entire $800,000 stays tax-deferred but eventually gets taxed at ordinary income rates. If she elects NUA, she pays ordinary income tax on $120,000 in the year of the distribution, transfers the shares in-kind to a taxable brokerage account, and pays long-term capital gains rates on the $680,000 of appreciation only when she actually sells.
In 2026, the top federal ordinary income rate is 37%, kicking in at $640,600 for single filers and $768,700 for joint filers. Long-term capital gains top out at 20%. That 17-percentage-point spread is the structural reason NUA exists. The rule lives in IRC Section 402(e)(4) and is summarized in IRS Topic No. 412.
A clean way to think about the trade: ordinary tax now on a smaller number, capital gains later on a bigger one. The bet only pays if the ratio of basis to fair market value is favorable enough. For more on the rate brackets that drive this math, see How Much Will I Pay in Capital Gains Tax?.
Who Qualifies for the NUA Tax Strategy?
Qualifying for NUA is binary. You meet the requirements or you do not, and missing one disqualifies the entire move. The IRS lays out four conditions in Pub 575 and clarifies them in Topic 412.
First, the distribution has to be a lump-sum distribution. The entire balance of every account of the same kind under the employer's plan has to come out in one tax year. A partial distribution, a series of payments, or any leftover balance past year-end breaks the requirement.
Second, the distribution has to be triggered by one of four events: separation from service, reaching age 59½, death, or disability. A job change is the most common trigger; retirement is the second.
Third, the company stock has to come out in-kind. You receive actual shares, transferred to a non-qualified brokerage account in your name. Selling the shares inside the plan and taking cash converts the appreciation back to ordinary income on the way out.
Fourth, you cannot have taken any prior distribution after the most recent triggering event without first using up that event. If you separated from a job at 55 and took a small cash withdrawal then, you used the separation trigger and need a new one to qualify.
A few situations look like exceptions but are not. A direct rollover of the company stock to an IRA cancels NUA forever; once inside an IRA, every dollar of future distribution is ordinary income. Stock held outside a qualified plan, such as in an ESPP or restricted stock account, does not qualify. For background on tracking, see cost basis tracking for taxable accounts.
Jeff Judge often tells clients that the NUA decision is one of the rare planning moves with a clean, calculable answer. "Either the basis-to-market-value ratio works, or it does not. There is no soft middle on this one." His point: NUA does not reward optimism. It rewards math.
When Does the NUA Election Actually Save You Money?
NUA pays off in three specific situations. Outside of those, the math gets thin.
The first is a low cost basis on appreciated stock. A common rule of thumb Jeff uses with clients: if the cost basis is under 30% of the current value, NUA almost always beats a straight rollover. Between 30% and 50%, it usually still wins, but the marginal value shrinks. Above 50%, the strategy gets hard to justify because you pay ordinary income on a large chunk just to defer capital gains on a smaller one.
The second is a near-term sale plan. NUA delivers the most value when you plan to sell within a few years of the distribution. If you intend to hold the same concentrated position for another 20 years, an IRA rollover keeps the tax deferred longer and may produce a better net result. For more on the trade-off, see How do I diversify a concentrated company stock position without a huge tax bill?.
The third is high projected retirement tax brackets. If a client expects to stay in a 22% to 35% bracket through retirement, paying capital gains rates (0%, 15%, or 20% depending on income) on the appreciation creates real savings. If the client expects a 10% to 12% bracket forever, the rate spread shrinks and the move loses appeal.
A simple comparison sharpens the point.
| Factor | Rollover to IRA | NUA election |
|---|---|---|
| Tax on cost basis at distribution | Deferred | Ordinary income now |
| Tax on appreciation at sale | Ordinary income | Long-term capital gains |
| 10% early withdrawal penalty under 59½ | Only on cash withdrawn | Applies to cost basis only |
| Step-up at death | No (IRD treatment) | Partial (post-distribution growth only) |
| Future RMD treatment | Yes, on full balance | No, shares are taxable not retirement |
The last row is the part most clients miss. Shares moved out under NUA stop being retirement assets entirely. They sit in a taxable brokerage account, so there are no future required minimum distributions on those shares and a partial basis step-up applies to any portion still held at death.
The R.U.D.D.E.R. Method™ is Chesapeake Financial Planners' six-step planning process: Review and Recognize, Uncover and Understand, Design and Develop, Discuss and Decide, Execute and Empower, and Reassess and Refine. NUA is one of those decisions where the Review-and-Recognize step matters more than the math. Clients often arrive thinking they want to roll the whole plan to an IRA because that is the default story they have heard. Walking through the basis-to-market-value ratio at the front end is what surfaces NUA as a real option.
How Do You Execute an NUA Distribution Without Disqualifying It?
Executing an NUA distribution looks simple. Three steps, but the order matters and the timing rules are unforgiving.
Step one is confirming the triggering event has occurred and no prior distributions have used it. Pull the plan's transaction history for the year. Any in-service withdrawal, hardship distribution, or partial rollover after the most recent qualifying event resets the clock.
Step two is requesting an in-kind distribution of the company stock to a non-qualified brokerage account, while the rest of the plan rolls over to an IRA. The plan administrator will issue a Form 1099-R coded for NUA, with the cost basis reported in Box 2a and the NUA amount in Box 6. The brokerage account has to be set up in advance and titled correctly.
Step three is making sure every account of the same kind under the employer's plan zeros out in the same calendar year. If the plan has both a 401(k) and a profit-sharing account, both have to be distributed. Pension plans count as a different kind and can be left alone.
Jeff has watched several long-tenured engineers and executives walk away from six-figure tax savings because they rolled the entire 401(k) into an IRA without checking the company stock position first. Once the stock crosses into the IRA, the NUA election is gone permanently. There is no fix, no retroactive election. The plan administrator does not flag the eligibility for you, and the default rollover forms route money straight to the IRA. For background, see when to rollover a 401(k) at retirement.
Two operational notes. The 10% additional tax on early distributions under age 59½ applies to the cost basis portion only, not the NUA amount. That makes early-separation NUA workable for older workers but expensive for younger ones. And the basis paid in tax during the distribution year can be reduced by any after-tax contributions made to the plan.
What Are the Common NUA Mistakes That Cost People Money?
The mistakes cluster around three failure modes that show up in nearly every NUA case Jeff has reviewed.
The first is the silent rollover. The plan administrator processes a generic rollover paperwork packet, the company stock goes to the IRA with everything else, and the NUA window closes without the client realizing it ever existed. There is no notification; the administrator's job is to process the form. This is why the decision to elect NUA has to be made before any distribution paperwork is signed.
The second is partial-year disqualification. A client takes an early hardship withdrawal in March, then tries to do a lump-sum NUA election in November. The earlier withdrawal used the qualifying event already, so the November distribution is not a lump-sum distribution under the IRS definition. Same mistake: rolling over part of the plan in one tax year and trying to take the company stock the next. Both pieces have to fall under one triggering event in one calendar year.
The third is misapplied math. Clients run the cost-basis ratio against today's stock price and decide NUA looks great, without factoring in their tax bracket the year of the distribution. A client retiring at the end of December with $300,000 in W-2 income that year will pay top marginal rates on the basis. The same client distributing in January would pay much lower rates because the W-2 income drops. Timing the trigger across calendar years can swing the net result by tens of thousands.
A fourth mistake worth flagging on the diversification side. NUA is a tax move, not an investment recommendation. Once the shares sit in a taxable brokerage account, they often represent a heavily concentrated position. The tax savings do not offset the concentration risk by themselves. A typical post-NUA plan trims the position over several years and rebuilds a diversified portfolio. For a pairing strategy, see Should I donate appreciated stock instead of cash?.
The 401(k) plan itself has not gotten less generous; the 2026 employee deferral limit is $24,500. Active employees who continue to contribute to a plan after rolling out the company stock still get the tax-deferral benefit on new contributions.
Related Topics Worth Reading
NUA does not live in isolation. It interacts with several adjacent decisions any pre-retiree with company stock will face.
When does a Roth conversion make financial sense and how do you execute it?. The low-bracket years that make a Roth conversion attractive often make an NUA election attractive too. Coordinating both in the same year requires careful sequencing because the basis paid on the NUA stock can push you out of the optimal Roth conversion bracket.
estate planning with concentrated stock. NUA shares retained at death receive a step-up in basis on the growth that occurred after the distribution date, but the original NUA amount itself does not step up because it is treated as income in respect of a decedent. Estate planning around NUA stock is a different conversation than estate planning around plain taxable stock.
Frequently Asked Questions
What is the difference between NUA and a Roth conversion?
NUA moves appreciated company stock out of a 401(k) at long-term capital gains rates, while a Roth conversion moves pre-tax retirement money into a Roth IRA at ordinary income rates in exchange for qualified distributions later that under current IRS rules are not federally taxed. NUA is a one-time election tied to a triggering event; a Roth conversion is a recurring planning lever available almost any year. Many pre-retirees use both in the same window.
Can I do NUA on stock from an old employer's 401(k)?
Yes, as long as the company stock is still inside that plan and the lump-sum and triggering-event requirements are met. The plan does not have to be your current employer's. If you separated years ago and left the plan in place, you can still elect NUA when you distribute the full plan within one tax year. Be careful not to have taken any partial distributions after that separation, as those use the trigger.
Does the 10% early withdrawal penalty apply to NUA?
The 10% additional tax under age 59½ applies only to the cost basis portion of the NUA distribution, not to the unrealized appreciation. That makes early-separation NUA workable for clients in their 50s, particularly those qualifying under the rule-of-55 separation exception. For clients in their 40s, the penalty on the cost basis often makes the move too expensive. The capital gain portion sold later faces only capital gains rates, never the early withdrawal penalty.
What happens if I roll over the company stock to an IRA first?
Once company stock moves into an IRA, the NUA election is permanently lost on those shares. The IRA treats every dollar as ordinary income on distribution, regardless of how the stock was held inside the 401(k). This is the single most common and most expensive NUA mistake. There is no curative election, no waiver process, no retroactive fix. The decision has to be made and executed before any rollover paperwork is signed.
Can I keep some shares in the plan and take NUA on others?
No. The lump-sum distribution requirement means every account of the same kind under the employer's plan has to be distributed in one tax year. You cannot do partial NUA. However, you can take the company stock in-kind under NUA and simultaneously roll the rest of the plan balance to an IRA in the same calendar year. Both pieces leave the plan, the company stock to a taxable brokerage and the rest to the IRA.
How does NUA affect my heirs?
At death, the shares held under an NUA election receive a partial step-up in basis. The post-distribution appreciation, meaning any growth after the shares left the plan, gets a full step-up to fair market value on the date of death. The original NUA amount, however, is treated as income in respect of a decedent and does not step up. Heirs pay long-term capital gains rates on that locked-in NUA amount when they eventually sell, but the post-distribution growth is not taxed because of the basis step-up.
Putting NUA on Your Tax-Planning Checklist
For long-tenured employees with company stock in a 401(k), the net unrealized appreciation decision sits at the intersection of taxes, concentration risk, and estate planning. The NUA window closes the moment you sign a rollover form, so walk through the basis ratio, current bracket, and intended hold period before any paperwork moves.
If you found this helpful, our Tax Planning Playbook for Pre-Retirees covers Roth conversions, NUA, IRMAA thresholds, and donor-advised funds in depth. Download it at chesapeakefp.com.
Want to go deeper? Our Tax-Smart Financial Plan walks through this step by step.
Disclosures
The information provided is for educational purposes only and should not be construed as investment advice. Investment strategies should be tailored to individual circumstances, risk tolerance, and goals. Past performance doesn't guarantee future results. Consult with qualified financial professionals regarding your specific situation.
This information is not intended to be a substitute for specific individualized tax, investment or legal advice. We suggest that you discuss your specific situation with a qualified tax, legal or financial advisor.
Advisors associated with Chesapeake Financial Planners may be either (1) LPL Financial Registered Representatives offering securities through LPL Financial, Member FINRA and SIPC, and investment advisor representatives offering investment advice through Great Valley Advisor Group; or (2) solely investment advisor representatives offering investment advice through Great Valley Advisor Group and not affiliated with LPL Financial. Great Valley Advisor Group, and Chesapeake Financial Planners are separate entities from LPL Financial.
