Net Unrealized Appreciation in 2026 — the One-Time Strategy for Company Stock Sitting in Your 401(k)

If you have spent years contributing to a 401(k) that includes employer stock, and that stock has grown significantly, you are sitting on a decision most people never realize they have: the standard move of rolling everything into an IRA is not automatically the best one. Net unrealized appreciation, or NUA, is a narrow but powerful IRS rule that can shift a large slice of that stock's growth from ordinary income tax rates to the far lower long-term capital gains rate — but it is a one-time, all-or-nothing election, and getting it wrong forfeits it permanently.

What Net Unrealized Appreciation Actually Means

Net unrealized appreciation is the difference between what your employer stock originally cost inside the 401(k) — its cost basis — and its current market value. If your plan bought shares at $10 and they are worth $60 today, the $50 gap per share is the NUA. Ordinarily, every dollar withdrawn from a traditional 401(k) is taxed as ordinary income, regardless of whether the growth came from stock appreciation or anything else. The NUA rule carves out an exception specifically for employer stock.

How the Election Works

To use NUA, you take a lump-sum distribution of your entire 401(k) balance in a single tax year — a full distribution, not a partial one. The employer stock moves to a regular taxable brokerage account rather than an IRA; everything else in the plan can roll over to a traditional IRA as usual. At the moment of distribution, you owe ordinary income tax only on the stock's original cost basis — not its current value. The NUA portion — all of the appreciation — is not taxed yet at all.

The NUA is only taxed when you eventually sell the shares, and at that point it is taxed at long-term capital gains rates, regardless of how long you personally held the stock after the distribution. Any additional appreciation after the distribution date is taxed under normal capital gains holding-period rules from that point forward.

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Why the Rate Difference Is So Large

This is the entire reason NUA exists as a strategy. Ordinary income tax rates at the top bracket run significantly higher than the top long-term capital gains rate. A retiree who simply rolled company stock into an IRA and withdrew it later pays ordinary rates on every dollar, appreciation included. A retiree who elects NUA on the same stock pays ordinary rates only on the smaller original cost basis, with the much larger appreciation taxed at the lower capital gains rate whenever the shares are eventually sold — and not one day sooner.

The bigger the ratio of appreciation to original cost basis, the more powerful the NUA election becomes. Long-tenured employees at companies whose stock has grown substantially over decades tend to see the largest benefit; someone who recently added employer stock at close to its current price has little appreciation to shelter and the strategy offers far less value.

The Real Trade-Offs

• Tax due now. The cost basis is taxed as ordinary income immediately in the distribution year — a real, current-year tax bill that has to be funded from somewhere, and it can push you into a higher bracket that year.

• No further tax deferral on that stock. Money left in an IRA keeps growing tax-deferred indefinitely. Once NUA stock sits in a taxable brokerage account, future growth and dividends are taxed in the ordinary course, not deferred.

• It is all-or-nothing, once. The lump-sum distribution requirement and the one-time nature of the election mean this cannot be revisited or partially undone later — the decision has to be right the first time.

• Concentration risk remains. Electing NUA does not diversify the position; it only changes how the eventual sale is taxed. A retiree still holding a large single-stock position carries the same market risk as before, just with a better tax outcome when they choose to sell.

Where This Fits in a Retirement Plan

NUA decisions are best made as part of a full retirement transition plan, not a standalone form to sign on the way out the door. The immediate tax bill needs to be weighed against your income in the distribution year, the rest of your retirement account balances, your plans for diversifying out of the concentrated position, and your overall withdrawal sequencing in the years that follow. Getting the timing of the distribution year right — a lower-income year if one is available — can meaningfully reduce the tax owed on the cost basis portion.

How Tax Wealth Consultant Approaches NUA Decisions

Tax Wealth Consultant models the NUA election against the standard IRA rollover before you distribute a single share: calculating the actual cost basis and appreciation ratio, projecting the immediate tax cost against your income in that year, and weighing it against the value of continued tax deferral. Because this is a one-time, irreversible choice, we make sure it is evaluated once, correctly — not defaulted into by the plan's standard rollover paperwork.

This decision only comes around once. Make sure it is the right one.

Schedule your confidential 30-minute review with Tax Wealth Consultant today.

calendly.com/taxwealthconsultant-support/30min   |   (949) 409-8335 

Tax Wealth Consultant provides tax planning, tax preparation, and wealth advisory services for business owners, professionals, and investors in Irvine, Orange County, and beyond.