Net Unrealized Appreciation (NUA): Lower Taxes on Company Stock

If you have company stock in your 401(k), the net unrealized appreciation (NUA) strategy can save you thousands in taxes by converting what would be ordinary income into long-term capital gains. This is one of the most powerful strategies for employees with concentrated stock positions.

Key Takeaways

• NUA lets you pay capital gains tax (0-20%) instead of ordinary income tax (up to 37%) on stock appreciation.
• You must take a lump-sum distribution of your entire 401(k) in one tax year.
• The cost basis is taxed as ordinary income; only the NUA gets capital gains treatment.

What Is Net Unrealized Appreciation?

Net unrealized appreciation is the difference between:

• What your employer paid for company stock when it went into your 401(k) (the cost basis)
• What the stock is worth when you distribute it

Example:

• Cost basis when purchased: $20,000
• Current value: $120,000
• NUA = $100,000

With the NUA strategy, that $100,000 of appreciation is taxed at long-term capital gains rates (0%, 15%, or 20%) instead of your ordinary income rate (up to 37%).

How NUA Works: Step by Step

Step 1: Confirm Eligibility

You must have a qualifying event:

• Separation from service (leaving the company)
• Reaching age 59½
• Death
• Disability (for self-employed plans)

Step 2: Take a Lump-Sum Distribution

You must distribute your entire 401(k) balance within a single tax year. This includes:

• Company stock (transferred “in-kind” to a taxable brokerage account)
• Other assets (can be rolled to an IRA or taken as cash)

Critical: The stock must be transferred in-kind—not sold inside the 401(k).

Step 3: Pay Tax on the Cost Basis

The cost basis of the stock is taxed as ordinary income in the year of distribution. Using our example:

• Cost basis: $20,000 → taxed at your ordinary rate

Step 4: Pay Capital Gains on NUA (When You Sell)

When you eventually sell the stock:

• NUA portion ($100,000) → taxed at long-term capital gains rates (even if you sell immediately)
• Any additional appreciation after distribution → taxed based on your holding period

Tax Comparison: NUA vs IRA Rollover

Let’s compare for someone in the 32% tax bracket with $120,000 of company stock ($20,000 basis, $100,000 NUA):

Approach	Tax on Basis	Tax on $100k NUA	Total Tax
NUA Strategy	$6,400 (32%)	$15,000 (15% LTCG)	$21,400
IRA Rollover	$0 now	$32,000 later (32%)	$32,000

Savings with NUA: $10,600 (and that’s before considering potential bracket changes in retirement)

When NUA Makes Sense

NUA is most valuable when:

• ✅ Your stock has significant appreciation (NUA is large relative to basis)
• ✅ You’re in a high ordinary income bracket now
• ✅ You can afford to pay tax on the cost basis today
• ✅ You want access to funds before 59½ (no 10% penalty on NUA portion)
• ✅ You plan to sell soon and want capital gains treatment immediately

When NUA May NOT Make Sense

• ❌ Your stock has little appreciation (NUA is small)
• ❌ You expect to be in a much lower bracket in retirement
• ❌ You can’t afford the immediate tax on the cost basis
• ❌ You want to continue deferring taxes as long as possible
• ❌ The stock is highly concentrated and you’d prefer to diversify in an IRA

Important Rules and Gotchas

The Lump-Sum Requirement

You must distribute your entire account balance within one calendar year. Partial distributions don’t qualify for NUA treatment.

Holding Period for Additional Gains

• NUA portion: Always qualifies for long-term capital gains, even if sold immediately
• Post-distribution appreciation: Follows normal rules (hold 1+ year for LTCG)

The 10% Early Withdrawal Penalty

• Cost basis: Subject to 10% penalty if you’re under 59½ (unless you qualify for an exception)
• NUA portion: NOT subject to the 10% penalty (this is a key advantage!)

State Taxes Vary

Some states tax capital gains at the same rate as ordinary income. Check your state’s rules.

DIY Checklist: Forms + Questions

Forms you’ll see

• Form 1099-R showing the distribution (Box 6 shows NUA amount)
• Form 8949 and Schedule D when you sell the stock
• Form 1040 reporting ordinary income on the cost basis

Questions you can answer yourself

• What is my company stock’s cost basis vs current value?
• Am I experiencing a qualifying event (separation, 59½, etc.)?
• Can I afford the immediate tax on the cost basis?
• What is my current ordinary income rate vs the 15% LTCG rate?
• Does my state give favorable treatment to capital gains?

Information to request from your plan

• Total cost basis of company stock in your 401(k)
• Current fair market value
• Whether the plan supports in-kind distributions
• Any restrictions on company stock (blackout periods, etc.)

NUA vs Other Strategies

Strategy	When It’s Better
NUA	High appreciation, high current bracket, need access before 59½
IRA Rollover	Low appreciation, expect lower future bracket, want max deferral
Roth Conversion	Want tax-free growth, have cash to pay conversion tax
Partial NUA	Take NUA on stock, roll other assets to IRA

Example: Full Calculation

Scenario: You’re 55, leaving your job, with $500,000 in your 401(k):

• $200,000 in company stock (cost basis: $30,000, NUA: $170,000)
• $300,000 in mutual funds

NUA Strategy:

1. Transfer $200,000 of stock in-kind to taxable brokerage
2. Roll $300,000 to Traditional IRA
3. Pay ordinary income tax on $30,000 cost basis (~$7,200 at 24%)
4. When you sell the stock: pay 15% LTCG on $170,000 NUA (~$25,500)
5. Total tax on stock: ~$32,700

IRA Rollover Alternative:

• Roll everything to IRA
• Eventually withdraw and pay ordinary income on full $200,000 (~$48,000 at 24%)
• Total tax on stock: ~$48,000

NUA Savings: ~$15,300

Related Guides

• 401(k) to IRA Rollover — understanding rollover options and when to keep your 401(k)
• Capital gains tax strategies — broader strategies for managing capital gains
• Taxes on 401(k) withdrawals — how different distribution types are taxed
• Roth conversion ladder — an alternative approach to accessing retirement funds early
• Stock options (ISO/NSO) tax guide — related employer stock compensation strategies
• RSU taxes and double taxation — another common employer stock tax issue
• Tax-efficient retirement withdrawal strategy — planning which accounts to draw from first
• Inherited IRA rules — NUA considerations when inheriting a 401(k)

How sharper.tax Helps

When you upload your tax return to sharper.tax, we analyze your income, tax bracket, and retirement account activity to evaluate whether strategies like NUA could reduce your tax burden. We model the difference between NUA and a standard IRA rollover based on your actual numbers. Sophisticated tax planning used to require a high-end CPA---we make it available for free.

Sources

• IRS Publication 575 (Pension and Annuity Income)
• IRS Notice 98-24 (NUA Rules)
• IRS Topic 412 (Lump-Sum Distributions)

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The information above is educational and not tax advice.