Form 3921 vs. Form 3922: ISO Exercise or ESPP Transfer?
Use the stock plan and reporting event to distinguish these information returns. Original timelines and three retrieval questions separate corporate reporting from an employee’s tax calculation.
Form 3921 reports stock transferred following a qualifying incentive stock option exercise. Form 3922 concerns a qualifying employee stock purchase plan transfer of legal title. Start with the plan and event, not simply the words “employee stock.” The IRS Form 3921 page and Form 3922 page describe the respective reporting obligations.
Last reviewed: November 6, 2026. Agent-assisted source check against the IRS pages and instructions linked below. Fictional examples teach form recognition; they do not determine an individual’s return, basis or tax liability.
Source and exam year: The IRS SEE FAQ anchors the 2026–27 examination to law amended through December 31, 2025, generally using calendar-year 2025 facts. This guide uses the April 2025 instructions for Forms 3921 and 3922. Check for a superseding revision when handling an actual filing.
Compare the event, not the last digit
| Question | Form 3921 | Form 3922 |
|---|---|---|
| Which plan? | Incentive stock option described in section 422(b) | Employee stock purchase plan described in section 423(c), subject to the reporting conditions |
| Which event matters? | Stock transfer following exercise | Initial transfer of legal title to the covered shares |
| Is a grant alone enough? | No | No |
| Who has the information-return obligation? | The reporting corporation | The corporation whose stock is transferred |
For Form 3922, the IRS description includes a purchase price below the stock’s grant-date value, or a price that was not fixed or determinable at grant. “ESPP” by itself is not the complete reporting test.
Corporations file the information returns and furnish recipient statements. That duty is separate from the recipient’s own tax reporting. The combined instructions distinguish those responsibilities.
Timeline 1: Maya exercises an ISO
Maya receives an ISO grant in 2023. In October 2025, she exercises it and receives 60 shares. Her exercise price is $15 per share; the exercise-date value is $27. Assume the option and transfer meet the applicable ISO reporting requirements.
The event to recognize is the 2025 exercise and resulting transfer, so Form 3921 is the relevant information return. A grant date appearing in the records does not shift that event into 2023.
The exercise-price/value gap is:
60 × ($27 − $15) = $720.
That arithmetic does not establish $720 of tax, or prove Maya owes AMT. The IRS stock-options topic distinguishes regular income treatment from possible AMT consequences of ISO exercise. The full tax calculation requires more facts than this form-recognition exercise provides.
The useful habit is to make two notes: “information return: 3921” and “individual tax consequences: further analysis.” One answer does not complete the other task.
Timeline 2: Theo’s ESPP shares enter a brokerage account
Theo’s covered ESPP shares enter his account at a recognized broker in 2025 under the arrangement in the instructions. He sells in 2027. Those instructions treat that deposit as the initial title transfer. A 2025 Form 3922 event need not wait for his 2027 sale.
Draw three boxes: acquisition, title transfer, sale. They may occur close together or on different dates. Identify the event the information-return rule actually asks about before choosing the year.
Boundaries worth retaining
The instructions include a limited nonresident-alien exception involving Form W-2 requirements over a defined period. Nationality alone does not establish it.
Likewise, do not classify an award as an ISO just because it involves an employer’s stock. IRS Topic 427 distinguishes statutory and nonstatutory options. Plan documents, exercise records and transfer details matter; neither form number is a universal stock-compensation shortcut.
Three retrieval questions
Answer all three before looking below.
- An employee’s qualifying ISO is granted in 2024 and exercised for shares in 2025. Which form is relevant to the exercise transfer, and which year contains that event?
- Why can a covered 2025 ESPP brokerage deposit matter before a 2027 sale?
- An employee receives Form 3921 showing an exercise-price/value difference. Does that alone prove an AMT liability or make the employee responsible for filing the corporation’s information return?
Answers and reasoning
- Form 3921; 2025. Recognize the exercise transfer rather than the earlier grant.
- A covered title transfer can precede sale. Under Theo’s assumed arrangement, the brokerage deposit is that event.
- Neither conclusion follows. The individual tax calculation and the corporation’s information-return responsibility are separate questions.
Practice Part 1 income-and-assets questions in unit P1-U04 →
For the separate AMT calculation, continue with AMT explained for EA candidates.