IRS Form 3921 (Tax Year 2025)
Exercise of an Incentive Stock Option Under Section 422(b)
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IRS Form 3921 is used by corporations to report transfers of stock to employees who have exercised an Incentive Stock Option (ISO). ISOs are a type of employee stock option that provide tax advantages to employees if specific conditions are met.
Who Files Form 3921
The corporation that issued the Incentive Stock Options (ISOs) is responsible for filing Form 3921. It must be filed with the IRS for each employee who exercised an ISO in the tax year. The corporation is also required to provide a copy of the form to the employee.
Who Receives Form 3921
The Employee who exercised the ISO receives a copy of Form 3921 from the corporation.
Purpose of Form 3921
The form records details of the ISO exercise, such as the grant date, exercise date, number of shares, fair market value at exercise, and the exercise price. This information is essential for employees when determining if they owe Alternative Minimum Tax (AMT), as ISOs are subject to specific tax rules and reporting requirements.
Due Date
Furnish Copy B to the recipient by January 31. File electronically by March 31.
