ISO Disqualifying Disposition 2027 Tax Calculator

A disqualifying disposition occurs when you sell ISO shares before satisfying both holding periods (2 years from grant + 1 year from exercise). The favorable LTCG treatment is lost — the original bargain element becomes ordinary income.

Shares Sold

Strike Price ($)

FMV at Exercise ($)

Sale Price ($)

Days Between Exercise and Sale

Federal Marginal Bracket %

State Tax Rate %

Total Tax

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Net After Tax

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Tax Treatment

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Bargain Element (W-2 Ordinary)	—
Additional Gain	—
Tax on Bargain (Ordinary)	—
Tax on Additional Gain	—
Additional Gain Classification	—
Total Tax	—
Net Cash After Tax	—

An ISO disqualifying disposition occurs when you sell shares before satisfying the dual holding period: 2 years from grant AND 1 year from exercise. The IRS recharacterizes the income — the bargain element (FMV at exercise minus strike) becomes ordinary W-2 income at sale, eliminating the favorable long-term capital gains treatment. The IRS rule appears at IRC Section 421(b).

Why You Might Trigger a Disqualifying Disposition

Common reasons: same-day cashless exercise to fund strike, fear of post-IPO stock decline, immediate cash need (medical, housing, kids' tuition), portfolio rebalancing concern (too concentrated). The 1-year-from-exercise + 2-year-from-grant rule is rigid — even one day short triggers full disqualification.

The Tax Recharacterization in 2027

On a disqualifying disposition, the lesser of (a) bargain at exercise or (b) gain at sale becomes ordinary W-2 income. Any gain above FMV at exercise is capital gain — long-term if held 1+ year from exercise, short-term otherwise. A bonus: any AMT previously paid on this exercise becomes a credit against the recharacterized tax via Form 8801.

Strategic Use of Disqualifying Disposition

Counter-intuitively, a disqualifying disposition can be GOOD if the stock has crashed since exercise. If FMV at sale is below FMV at exercise, the ordinary income is capped at the actual gain — protecting you from being taxed on phantom income. Always model both qualifying and disqualifying scenarios when the stock has moved significantly.

Last updated May 2026. Sources: IRS Form 3921, IRS Pub 525