Net Unrealized Appreciation (NUA): The Overlooked Tax Break Hiding in Your 401(k)

If you've spent years at a company that matched contributions in company stock, or if you bought shares through your 401(k) yourself, there's a tax provision that almost nobody brings up at retirement — and it can be worth tens of thousands of dollars.

It's called Net Unrealized Appreciation, or NUA, and it applies specifically to employer stock held inside a 401(k) or similar workplace plan.

Wondering whether this applies to your account? Schedule a complimentary consultation with Ben Loughery.

What NUA Actually Means

When you leave your employer and start distributing your 401(k), the standard move is to roll everything into an IRA. That keeps the money tax-deferred and avoids an immediate tax bill. For most assets in the account, that's the right call.

Company stock is the exception.

NUA is the difference between what you originally paid for the employer stock inside your 401(k) (the cost basis) and what it's worth today. Instead of rolling that stock into an IRA, you can distribute it directly to a taxable brokerage account. When you do:

• You pay ordinary income tax only on the original cost basis, not the full current value.
• The appreciation — the NUA portion — is taxed at long-term capital gains rates when you eventually sell, regardless of how long you've personally held the shares after distribution.
• Any further growth after the distribution is also taxed at capital gains rates once sold, assuming you hold the position more than a year past distribution.

A Simple Example

Say you accumulated $400,000 in company stock inside your 401(k) over 20 years, but your original cost basis — what was actually contributed and used to purchase those shares — was $80,000. The remaining $320,000 is appreciation.

Roll it all into an IRA, and every dollar you eventually withdraw gets taxed as ordinary income — potentially at rates north of 30% once you factor in federal brackets.

Use the NUA strategy instead, and you pay ordinary income tax on just the $80,000 basis at the time of distribution. The $320,000 in appreciation gets taxed later, at sale, at long-term capital gains rates — often 15% to 20% depending on your bracket. On a gap that wide, the tax savings can run into the tens of thousands of dollars.

The Rules You Have to Get Right

NUA isn't a strategy you back into after the fact. A few requirements are non-negotiable:

• It has to be a lump-sum distribution. You must distribute the entire balance of the plan within a single tax year, following a qualifying event — separation from service, reaching age 59½, disability, or death.
• The stock has to move to a taxable account, not an IRA. Rolling it into an IRA first eliminates the NUA treatment permanently.
• You need cash on hand for the tax bill. Since you owe ordinary income tax on the basis immediately, you'll want funds available outside the 401(k) to cover that.
• Timing the qualifying event is critical. If you're still employed and haven't hit 59½, you likely don't yet qualify for the distribution that unlocks NUA treatment.

Who Should Actually Consider This

This strategy tends to make the most sense for someone with:

• A meaningful gap between cost basis and current value in their company stock
• Other assets available to cover the immediate tax on the basis
• No urgent need to diversify out of the stock right away (though you can sell some and keep NUA treatment on what remains, in certain structures)
• A retirement or separation event already lined up, rather than years still to go

It tends to make less sense if the stock hasn't appreciated much, if you need to diversify out of a concentrated position immediately for risk reasons, or if you don't have outside cash to handle the basis tax.

Don't Assume Your Plan Administrator Will Bring This Up

Most 401(k) providers process the rollover-to-IRA path by default, because it's the simplest transaction for them to execute. NUA requires coordination between your distribution paperwork, your tax preparer, and your investment strategy — nobody at the custodian is going to flag it proactively.

Is There Company Stock Sitting in Your 401(k) Right Now?

If you've built up employer shares over a long career and you're within a few years of separating from that company, this is worth running the numbers on before you touch the rollover paperwork. Once the stock lands in an IRA, the option is gone for good.

Schedule a complimentary consultation with Ben Loughery at Lock Wealth Management, and let's see whether NUA treatment could change how much of your 401(k) actually reaches you.

Ben Loughery is a CERTIFIED FINANCIAL PLANNER® and founder of Lock Wealth Management, based in Atlanta, GA. He specializes in retirement income planning, tax optimization, and helping clients build financial confidence at every stage of life.