Net Unrealized Appreciation: A Powerful but Underused Tax Strategy

For individuals who hold company stock inside a 401k or other employer-sponsored retirement plan, the IRS offers a little‑known tax break called Net Unrealized Appreciation (NUA). This strategy can significantly reduce taxes in retirement—if you know how and when to use it.

Net Unrealized Appreciation refers to the increase in value of employer stock from the time it was purchased in the retirement plan (the cost basis) to its value when the stock is distributed. Instead of taxing the entire stock value at ordinary income rates at distribution, the IRS allows the growth portion—the NUA—to be taxed later at more favorable long‑term capital gains rates.

Here’s how it works: When you take a qualifying lump‑sum distribution that includes employer stock, the stock is moved into a non-retirement brokerage account and you pay ordinary income tax only on the stock’s cost basis in the year of distribution. The remaining 401k account balance is rolled to an IRA or Roth IRA, as appropriate, and is a non-taxable event. The stock held in the brokerage account and the remaining appreciation isn’t taxed until you sell the shares, at which point it is taxed as long‑term capital gains even if it has not been held in the brokerage account for 12 months. This can create meaningful tax savings for retirees.

To use the NUA rules, you must meet strict IRS criteria. The distribution must be a lump sum distribution, meaning the entire account balance from all employer plans of the same type must be withdrawn within a single tax year. Additionally, the distribution must be triggered by a qualifying event such as separation from service, reaching age 59½, disability, or death.

For many retirees, NUA can be valuable during “income‑gap years”—the period after leaving work but before Social Security or pension benefits begin—when lower income may make capital gains treatment particularly attractive. Overall, NUA can shift a portion of retirement assets from high ordinary income taxation to lower capital gains taxation.

Because NUA decisions are irreversible once executed, it’s important to evaluate this strategy carefully with a financial professional.

- Juli Erhart-Graves, CFP®, Reify Wealth Advisors

This article was included in the Reify Wealth Advisors Quarterly Newsletter.