Your ESPP details
With lookback, your purchase price uses the lower of offering or purchase FMV
Tax comparison
| Qualifying | Disqualifying | |
|---|---|---|
| Ordinary income | $35,000 | $35,000 |
| Capital gains / (loss) | $20,000 | $20,000 |
| Ordinary income tax | $11,200 | $11,200 |
| Capital gains tax | $3,000 | $3,000 |
| Total estimated tax | $14,200 | $14,200 |
| Purchase price per share | $85 |
| Bargain element per share | $35 |
| Sale price per share | $140 |
| Gain per share | $55 |
| Ordinary income (lesser of discount or gain) | $35,000 |
| Capital gains (remaining gain) | $20,000 |
| Ordinary tax (32%) | $11,200 |
| LTCG tax (15%) | $3,000 |
| Total tax | $14,200 |
| Total sale proceeds | $140,000 |
| Total purchase cost | $85,000 |
| Net (qualifying) | $125,800 |
| Net (disqualifying) | $125,800 |
What is How to Use the ESPP Tax Calculator?
An Employee Stock Purchase Plan (ESPP) lets you buy company stock at a discount, typically up to 15% under IRC Section 423. How your shares are taxed depends on whether you hold them long enough for a qualifying disposition.
How to Use
- Enter the number of shares purchased through your ESPP
- Input the FMV at the offering date and purchase date
- Set your discount percentage (typically 15%)
- Enter your expected sale price per share
- Toggle the lookback provision if your plan includes one
- Compare qualifying vs disqualifying disposition tax outcomes
Why Use This Tool?
Tips & Best Practices
- Qualified Section 423 ESPP shares are exempt from FICA taxes on the discount — a key advantage over RSUs
- The lookback provision can dramatically increase your effective discount if the stock price rose during the offering period
- Selling immediately (disqualifying disposition) locks in the discount but taxes the full bargain element as ordinary income
- The $25,000 annual purchase limit is measured at the offering-date FMV, not the purchase price
- Consider your overall equity exposure — if ESPP plus other company stock exceeds 10% of net worth, diversify
Frequently Asked Questions
How are ESPP shares taxed?
The discount on ESPP shares is taxed as ordinary income. For qualifying dispositions (held 2+ years from offering and 1+ year from purchase), ordinary income is limited to the lesser of the discount or your actual gain. The remaining gain is taxed as long-term capital gains. For disqualifying dispositions, the full bargain element at purchase is ordinary income.
What is a qualifying disposition for ESPP?
A qualifying disposition requires holding shares at least 2 years from the offering date AND 1 year from the purchase date. Both holding periods must be met. If either is not met, it is a disqualifying disposition.
What is the ESPP lookback provision?
A lookback provision applies the discount to the lower of the stock price at the offering start or the purchase date. If the stock rose during the offering period, you buy at the lower offering price minus the discount, creating a larger effective discount.
Are ESPP shares subject to FICA taxes?
Qualified Section 423 ESPP shares are NOT subject to FICA (Social Security and Medicare) on the discount — for both qualifying and disqualifying dispositions. This is a key advantage over RSUs and NSOs.
What is the maximum ESPP discount allowed?
Under IRC Section 423, the maximum discount is 15%. The maximum annual purchase is $25,000 of stock measured at the offering-date fair market value.