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Net Unrealized Appreciation (NUA) Calculator

Calculate the potential tax benefit of using the Net Unrealized Appreciation strategy for employer stock in a 401(k).

Result

Net Unrealized Appreciation
$150,000.00
Estimated Tax Using NUA Strategy
$38,500.00
Estimated Tax Without NUA (standard rollover)
$64,000.00
Potential Tax Savings
$25,500.00

The NUA strategy involves distributing employer stock from a 401(k) in-kind (not rolling it to an IRA), paying ordinary income tax only on the original cost basis immediately, while the appreciation (NUA) is taxed at long-term capital gains rates whenever the stock is eventually sold - this can produce significant savings for stock that has appreciated substantially, but requires a qualifying lump-sum distribution and careful execution.

About the NUA Tax Calculator

This calculator estimates the potential tax benefit of the Net Unrealized Appreciation (NUA) strategy, used when distributing employer stock held inside a 401(k) instead of rolling it into an IRA. It compares the tax owed under the NUA approach, where only the original cost basis is taxed as ordinary income immediately, against a standard rollover where the full current value is eventually taxed as ordinary income upon withdrawal.

How It Works

Enter the cost basis of the employer stock, its current fair market value, and your ordinary income tax rate. The calculator finds the net unrealized appreciation (current value minus cost basis), then compares two tax outcomes: taxing the cost basis at your ordinary rate plus the appreciation at a fixed long-term capital gains rate, versus taxing the entire current value at your ordinary rate the way a standard rollover distribution would eventually be taxed.

NUA = max(current value - cost basis, 0); Tax with NUA strategy = (cost basis x ordinary rate) + (NUA x 15%); Tax without NUA (standard rollover) = current value x ordinary rate; Potential tax savings = tax without NUA - tax with NUA, floored at zero.

Formula & Methodology

Because the capital gains rate is held fixed at 15% in this model, the comparison simplifies to the NUA amount multiplied by the gap between your ordinary rate and 15%. The larger the appreciation and the higher your ordinary rate is above 15%, the bigger the projected savings; if your ordinary rate is at or below 15%, the model shows no savings rather than a negative figure.

Examples

Significantly Appreciated Stock

With a $50,000 cost basis, $200,000 current value, and a 32% ordinary rate, NUA is $150,000, tax with the NUA strategy is (50,000 x 0.32) + (150,000 x 0.15) = $38,500, versus $64,000 under a standard rollover, for a projected savings of $25,500.

Modest Appreciation, Lower Bracket

With a $150,000 cost basis, $180,000 current value, and a 24% ordinary rate, NUA is $30,000, tax with NUA is (150,000 x 0.24) + (30,000 x 0.15) = $40,500, versus $43,200 under a standard rollover, for a smaller projected savings of $2,700.

Advantages

  • Quantifies the dollar difference between two distribution strategies instead of describing the NUA concept only in general terms.
  • Scales the projected benefit with how much the stock has actually appreciated, showing why the strategy matters more for long-held, highly appreciated stock.
  • Provides a side-by-side comparison of both tax outcomes rather than a single number, making the tradeoff easier to see.

Common Mistakes

  • Assuming the NUA strategy helps regardless of how much the stock has appreciated, when the benefit shrinks toward zero for stock with little gain over its cost basis.
  • Overlooking that tax on the cost basis portion is due immediately upon the lump-sum distribution, not deferred the way a rollover would allow.
  • Ignoring that this calculator uses a flat 15% capital gains assumption, which may not match an individual's actual long-term capital gains bracket or the added Net Investment Income Tax.

Edge Cases to Watch For

  • The long-term capital gains rate is fixed at 15% in the calculation and is not adjustable, so it does not reflect the 0% or 20% capital gains brackets, or the additional 3.8% Net Investment Income Tax that may apply to higher earners.
  • If the entered ordinary income tax rate is at or below 15%, the underlying math produces zero or negative projected savings, and the displayed result is floored at $0 rather than showing a negative figure, since the strategy's benefit depends entirely on the ordinary rate exceeding the capital gains rate.
  • If cost basis is entered as equal to or greater than current value, net unrealized appreciation is floored at zero, meaning the calculator shows no NUA benefit for stock that hasn't appreciated.

Common Use Cases

  • Employees nearing retirement who hold significant employer stock inside a 401(k) and are deciding how to distribute it.
  • Financial planners illustrating the potential tax tradeoff between an in-kind stock distribution and a standard IRA rollover.
  • Anyone evaluating whether a qualifying lump-sum distribution is worth the added complexity compared to a simple rollover.
Written & fact-checked by the Calculateus TeamLast updated August 5, 2026How we verify our formulas

Frequently asked questions

Why does NUA only make sense for employer stock with significant appreciation?

The strategy's benefit comes entirely from converting what would otherwise be ordinary-income-taxed appreciation into capital-gains-taxed appreciation, so the larger the gap between the stock's cost basis and current value, the bigger the potential tax rate arbitrage - for employer stock with little appreciation, the complexity and immediate tax due on the cost basis portion may not be worth pursuing compared to a simple IRA rollover.

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Conclusion

The NUA strategy's value comes directly from converting appreciation that would otherwise be taxed as ordinary income into capital gains treatment, so the projected savings rise with both the size of the appreciation and your ordinary tax rate. This calculator only estimates the tax comparison; qualifying for NUA treatment requires meeting specific distribution requirements that go beyond this math.

References