ESPP Calculator
Shares purchased at your plan discount, split into ordinary income and capital gain by qualifying vs. disqualifying disposition.
Your ESPP Calculator Result
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Your detailsInput Parameters
Purchase Details
The stock price on the first day of the offering period — Box 4 on Form 3922.
The market price on the day shares were actually purchased, before any discount — Box 3 on Form 3922.
Section 423 plans cap this at 15%.
Applies the discount to whichever is lower — the offering-date price or the purchase-date price.
Sale
Qualifying requires selling more than 2 years after the offering date AND more than 1 year after the purchase date. Both conditions must be met.
The lesser of your actual gain or the discount computed at the offering price ($40 × 15% × shares). Taxed at your ordinary income rate — see our Income Tax Calculator.
$5,000 contributed ÷ $34 price paid per share.
15% discount off the lower of the offering ($40) and purchase-date ($50) price.
Worth $2,353 at purchase (before any later price movement).
Taxed at long-term capital gains rates (0/15/20%) — see our Capital Gains Tax Calculator for your exact rate.
Sale proceeds of $9,559 minus your $5,000 cost — before splitting into ordinary income and capital gain/loss above.
Analysis
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Open calculatorESPP Taxation: Ordinary Income vs. Capital Gain, and Why the Split Matters
A qualified Section 423 Employee Stock Purchase Plan lets you buy company stock at a discount — up to 15% below market, often off the lower of the offering-date or purchase-date price (a "lookback"). When you eventually sell, part of your gain is taxed as ordinary income and part as a capital gain — and how the sale splits between the two depends entirely on whether it's a qualifying or disqualifying disposition.
One thing that makes qualified ESPPs different from RSUs and NSOs: no FICA. Under the American Jobs Creation Act of 2004, ordinary income from a qualifying §423 ESPP disposition is exempt from Social Security and Medicare tax entirely — it's still ordinary income for federal/state income tax, just not subject to payroll tax the way RSU and NSO income is.
Qualifying vs. Disqualifying: How the Split Actually Works
Ordinary income = lesser of (actual gain at sale) or (discount computed at the offering price)
Remainder = long-term capital gain
Disqualifying disposition (sold before either holding period is met):
Ordinary income = full bargain element at purchase (purchase-date FMV − price paid)
Remainder = capital gain/loss (short- or long-term depending on holding from purchase)
Worked example (this calculator's own defaults): $40 offering price, $50 purchase-date price, 15% discount with lookback, $5,000 contributed, sold at $65/share, qualifying disposition. With the lookback, the discount applies to the lower price ($40), so you pay $34/share and buy about 147.06 shares. At sale: proceeds ≈ $9,558.82, cost ≈ $5,000, total gain ≈ $4,558.82. Because it's qualifying, ordinary income is capped at the discount computed at the offering price (≈ $882.35) — the remaining ≈ $3,676.47 is long-term capital gain, taxed at the lower capital-gains rates instead of as wages.
That gap — roughly $882 taxed as ordinary income vs. roughly $3,676 taxed at capital-gains rates — is the entire reason the qualifying-disposition holding periods exist and matter. Selling one day before either the 2-year or 1-year mark converts a much larger share of the gain into ordinary income.