IRC 6039 Information Reporting for ISO Exercises and ESPP Transfers: Forms 3921 and 3922

IRC 6039 imposes employer information reporting obligations in two distinct areas of equity compensation: the exercise of incentive stock options (ISOs) described in IRC 422(b), and the first transfer of stock acquired through a qualified employee stock purchase plan (ESPP) under IRC 423. The resulting forms -- Form 3921 and Form 3922 -- are not merely administrative filings. They supply the data the employee needs to compute AMT adjustments, determine qualifying versus disqualifying disposition status, and reconstruct the cost basis and income components on a later sale. This guide is written for enrolled agents, CPAs, and tax attorneys who need a citation-anchored reference for IRC 6039 filing obligations, deadlines, penalty mechanics under IRC 6721 and 6722, and the connection between these information returns and the downstream tax consequences for both the employer and the employee.

All statutory citations, regulatory references, deadline specifications, and penalty amounts in this guide must be verified against the current text of the Internal Revenue Code and applicable IRS guidance at IRS.gov before being relied on in any client matter. Penalty amounts under IRC 6721 and 6722 are adjusted for inflation and change periodically; deadline rules may be affected by IRS guidance issued after the date of this publication. This guide is for informational purposes only and does not constitute legal or tax advice.

Section 1: IRC 6039 -- Who Must File and What Must Be Reported

IRC 6039 creates two separate and independent information reporting obligations, each triggered by a different equity compensation event. Understanding which event triggers which filing, and distinguishing the two forms from each other, is the starting point for any IRC 6039 compliance analysis.

Form 3921: ISO Exercises (IRC 6039(a)(1))

Under IRC 6039(a)(1), every corporation that transfers a share of stock to any person pursuant to the exercise of an incentive stock option described in IRC 422(b) must: (1) file an information return with the IRS; and (2) furnish a written statement to the employee. This obligation is triggered by the exercise of the ISO and the resulting transfer of stock -- it is not triggered at option grant, at vesting, or at the employee's later sale of the shares.

The filing obligation applies to the corporation whose stock is transferred -- the employer -- not to the employee. The requirement applies for each calendar year in which any ISO is exercised, even if only a single share of stock is transferred during the year. There is no de minimis threshold below which Form 3921 filing is excused.

Form 3921 must report certain required data fields. Based on the statutory structure of IRC 6039(a) and the form's design, the required information includes: the date the option was granted; the date the option was exercised; the exercise price per share; the fair market value of the stock on the exercise date; and the number of shares transferred. Confirm the specific information currently required on Form 3921 with the current Form 3921 instructions and IRS.gov; these requirements may have been updated for the current filing year and the instructions are the authoritative source.

Form 3922: ESPP First Transfers (IRC 6039(b))

Under IRC 6039(b), any corporation whose stock is transferred to any person pursuant to the first transfer of legal title described in IRC 423(c) must file an information return and furnish a written statement to the employee. The key phrase is "first transfer of legal title" -- the reporting obligation arises when the employee purchases the shares under the ESPP (the exercise or purchase date), not when the employee later sells them. This means Form 3922 is filed in the year of the ESPP purchase, which may be years before the employee actually disposes of the shares.

Form 3922 covers only qualified ESPP plans under IRC 423. Non-qualified stock purchase arrangements that do not satisfy IRC 423 are not covered by Form 3922; those purchases would generate ordinary income at purchase and be covered by ordinary W-2 reporting.

Form 3922 must report certain required data fields. Based on the statutory structure of IRC 6039(b) and the form's design, the required information includes: the date the option was granted (the offering date); the exercise date (the purchase date); the fair market value of the stock on the offering date; the fair market value of the stock on the exercise (purchase) date; the number of shares transferred; and the exercise price per share. Confirm the specific information currently required on Form 3922 with the current Form 3922 instructions and IRS.gov; requirements may have been updated for the current filing year.

NSOs Are Not Covered by IRC 6039

The IRC 6039 reporting obligation is tied specifically to the transfer of stock under a qualifying ISO (IRC 422(b)) or a qualifying ESPP (IRC 423). Non-qualified stock options (NSOs, also called nonstatutory stock options or NQSOs) do not require Form 3921. NSO exercises produce ordinary income at exercise, which is subject to income tax withholding and payroll taxes; the ordinary income is reported on Form W-2 through the standard withholding and employment tax framework. See the IRC 422 ISO and NSO compensatory equity practitioner guide for the full treatment of NSO taxation under IRC 83 and its interaction with the employment tax system.

Section 2: Filing Deadlines and E-File Requirements

IRC 6039 imposes three separate deadlines for each form: one for furnishing the employee copy, and two for filing with the IRS (one for paper filers, one for electronic filers). All three deadlines apply to both Form 3921 and Form 3922. Confirm each deadline with the current IRC 6039 regulations and IRS.gov for the applicable filing year before advising clients.

January 31: Employee Copies Due

The employer must furnish a written statement (the employee copy of Form 3921 or Form 3922, as applicable) to each employee by January 31 of the year following the calendar year in which the ISO exercise or first ESPP transfer occurred. For example, if an employee exercises ISOs in 2025, the employer must furnish the Form 3921 to the employee by January 31, 2026. Confirm the January 31 deadline -- and whether it applies to both forms under the current regulations -- with current IRC 6039 regulations and IRS.gov for the applicable filing year.

February 28: Paper Filers' IRS Copy Due

Employers who file paper information returns must file their IRS copies of Forms 3921 and 3922 by February 28 of the year following the calendar year of the ISO exercise or first ESPP transfer. Confirm the February 28 paper deadline with current IRS.gov guidance and the applicable year's Form 3921 and Form 3922 instructions.

March 31: Electronic Filers' IRS Copy Due

Employers who file information returns electronically have until March 31 of the year following the calendar year of the ISO exercise or first ESPP transfer to submit IRS copies. The extended deadline for electronic filers is an incentive for electronic filing and applies only if the employer actually files electronically. Confirm the March 31 e-file deadline with current IRS.gov guidance.

E-File Threshold: 10 or More Information Returns

Employers that are required to file 10 or more information returns (aggregated across all information return types, not counted separately per form type) during a calendar year must file those returns electronically. This 10-return threshold applies to Forms 3921 and 3922 along with all other information returns (such as Forms 1099-NEC, 1099-MISC, W-2, and others) in the aggregate. The threshold was reduced from 250 to 10 for information returns filed after January 1, 2024. Confirm the current applicable threshold, the aggregation methodology, and the effective date with current Treasury regulations and IRS.gov before advising clients; the rules may have been further modified after the date of this publication.

In practical terms, most employers with any meaningful employee count will exceed the 10-return threshold once Forms W-2 and other information returns are counted in the aggregate. Many employers that have historically filed paper Forms 3921 or 3922 may now be required to e-file under the reduced threshold. Confirm your client's obligation with current IRS.gov guidance.

Extensions: Form 8809

An extension of time to furnish recipient copies (employee copies) of Forms 3921 and 3922 may be available by filing Form 8809 (Application for Extension of Time to File Information Returns). Confirm the availability of an extension for these specific forms, the timing requirements, and the number of extensions available with the current Form 8809 instructions and IRS.gov; the rules governing extensions for information return recipient copies are distinct from extensions for the IRS filing deadline.

Corrections

If a previously filed Form 3921 or Form 3922 contained incorrect information, a corrected form must be filed with the IRS and a corrected copy must be furnished to the employee. Corrections should be made as promptly as possible; the longer a correction is delayed, the greater the potential exposure to IRC 6721 and 6722 penalties. Confirm correction procedures, including how to mark a form as corrected and whether electronic corrections require a different process than paper corrections, with current IRS.gov guidance and the applicable year's instructions for each form.

Section 3: Penalties for Noncompliance

IRC 6039 noncompliance can expose an employer to two separate and stacking penalty regimes: IRC 6721 for failure to file a correct information return with the IRS, and IRC 6722 for failure to furnish a correct payee statement to the employee. Both penalty regimes apply to Forms 3921 and 3922. Because the penalties are assessed on a per-return and per-statement basis, an employer that fails to file Form 3921 for 50 ISO exercises in a single year faces up to 50 separate IRC 6721 penalties (for the IRS filing failure) and up to 50 separate IRC 6722 penalties (for the employee copy failure). All penalty amounts described below must be confirmed with IRC 6721, IRC 6722, and IRS.gov; the amounts are adjusted for inflation and may differ from the figures in any prior version of IRS guidance.

IRC 6721: Failure to File a Correct Information Return with the IRS

IRC 6721 imposes a per-return penalty for each information return that is not filed correctly and on time with the IRS. The penalty is tiered based on the number of days late -- returns corrected within 30 days carry the lowest tier, returns corrected after 30 days but by August 1 carry an intermediate tier, and returns not corrected at all (or corrected after August 1) carry the highest tier. An annual maximum cap limits the total penalty per calendar year for all failures in that year, with a lower cap for small businesses. Confirm all per-return penalty amounts at each tier, the annual maximum cap (including the small business cap), and the definition of a "small business" for this purpose with IRC 6721 and current IRS.gov guidance; these figures are adjusted for inflation and change periodically.

IRC 6722: Failure to Furnish a Correct Payee Statement

IRC 6722 imposes a separate per-statement penalty for each payee statement (here, the employee copy of Form 3921 or Form 3922) that is not furnished correctly and on time. The IRC 6722 penalties are structured similarly to IRC 6721, with tiers based on the number of days late and a corresponding annual maximum. The IRC 6722 and IRC 6721 penalties are independent: an employer can owe both for the same underlying failure (one for not filing with the IRS, one for not furnishing the employee copy). Confirm all per-statement penalty amounts, annual maximums, and small business thresholds with IRC 6722 and current IRS.gov guidance.

Intentional Disregard: Substantially Higher Penalties (IRC 6721(e) and IRC 6722(e))

If the failure to file or furnish is due to intentional disregard of the filing requirements (rather than inadvertent oversight or reasonable cause), substantially higher per-return and per-statement penalties apply under IRC 6721(e) and IRC 6722(e). The intentional disregard penalty is not subject to the annual maximum cap that limits ordinary late-filing penalties, which means the aggregate exposure for intentional disregard can be significantly larger. No de minimis or reasonable cause exception applies to intentional disregard failures. Confirm the intentional disregard penalty amounts (per return and per statement) and the definition of intentional disregard with IRC 6721(e), IRC 6722(e), and current IRS.gov guidance; do not cite specific dollar amounts without a current IRS.gov verification.

Reasonable Cause Exception (IRC 6724(a))

Under IRC 6724(a), penalties under IRC 6721 and IRC 6722 may be waived if the failure was due to reasonable cause and not willful neglect. Whether reasonable cause exists is a fact-specific determination based on the circumstances of each employer. The IRS considers factors such as the nature of the failure, the employer's efforts to comply, and the steps taken to remediate the failure. Reasonable cause is not automatic and must be affirmatively established by the employer; it does not apply to intentional disregard failures. Confirm the IRS's current reasonable cause standards and the administrative process for requesting a penalty waiver with IRC 6724(a) and current IRS.gov guidance.

De Minimis Exception (IRC 6721(c))

IRC 6721(c) provides a limited de minimis exception under which a small number of information return failures may be corrected without incurring the full per-return penalty. The de minimis exception allows employers to correct a limited number of errors (per year) that were timely filed but incorrect. The exception does not apply to returns that were never filed at all; it applies only to returns that contained incorrect information. Confirm the current de minimis threshold and the conditions under which the exception applies with IRC 6721(c) and current IRS.gov guidance.

Section 4: ISO Tax Treatment and the AMT Connection

Form 3921 is not merely a compliance form -- it supplies data the employee needs to fulfill independent tax obligations, most importantly the alternative minimum tax (AMT) adjustment arising from the ISO exercise. Understanding why Form 3921 matters requires understanding the three-stage ISO tax lifecycle.

At Grant: No Income

The grant of a qualifying ISO does not produce any income recognition for the employee -- neither for regular income tax nor for AMT purposes. There is no withholding obligation at grant, no W-2 entry, and no employer reporting obligation. The Form 3921 filing obligation does not arise at grant; it arises only when the ISO is exercised.

At Exercise: No Regular Income; AMT Adjustment Required (IRC 56(b)(3))

Under IRC 422(a)(1), the exercise of a qualifying ISO does not produce ordinary income for regular tax purposes. No income appears on Form W-2. No income tax withholding is required. No payroll taxes apply. The employee acquires the stock at the exercise price without any immediate regular income tax consequence.

However, the spread between the fair market value of the stock on the exercise date and the exercise price is a positive adjustment for alternative minimum tax (AMT) purposes under IRC 56(b)(3). This spread must be reported on Form 6251 (Alternative Minimum Tax -- Individuals) as an AMT preference item in the year of exercise. If the employee's alternative minimum taxable income (AMTI) after the AMT exemption is large enough, AMT liability results in the exercise year.

The data the employee needs to compute the IRC 56(b)(3) AMT adjustment -- the exercise date, the FMV at exercise, the exercise price, and the number of shares transferred -- is exactly what Form 3921 reports. Without Form 3921, the employee may struggle to reconstruct these figures, particularly in years with multiple ISO exercises or where the employer's equity platform records are inaccessible.

OBBBA and Individual AMT

The One Big Beautiful Bill Act (OBBBA) may have made changes affecting the individual alternative minimum tax. Confirm any OBBBA changes to the individual AMT exemption amounts, phase-out thresholds, and applicable rate with IRS.gov and applicable guidance before advising clients on the AMT consequence of an ISO exercise. The OBBBA's interaction with the IRC 56(b)(3) AMT adjustment for ISO exercises should be verified at IRS.gov. Confirm whether any OBBBA changes affected IRC 422 (ISO qualifying requirements) or the holding period rules at IRS.gov.

ISO Qualifying Holding Period (IRC 422(a)(1))

For the sale of ISO shares to qualify for long-term capital gain treatment on the full spread, the employee must hold the shares for: (1) at least two years from the date the option was granted; AND (2) at least one year from the date the option was exercised. Both holding periods must be independently satisfied (IRC 422(a)(1)). If both are met, the employee recognizes no ordinary income on the sale; the entire gain from exercise price to sale price is long-term capital gain, and the employer has no Form W-2 reporting obligation for the disposition.

Because the qualifying holding period depends on both the grant date and the exercise date, Form 3921's record of those dates is the employer's own source document for evaluating whether a later notification of sale is a qualifying or disqualifying disposition. Confirm all qualifying disposition mechanics with IRC 422(a)(1) and IRS.gov.

Section 5: Disqualifying Dispositions and Employer Reporting Obligations

A disqualifying disposition is the most consequential downstream event for which Form 3921 serves as the foundational source document. When a disqualifying disposition occurs, the employer faces a W-2 reporting and payroll tax obligation -- but only if the employer knows the disposition occurred. The fundamental challenge is that the employer is not automatically notified when an employee sells ISO shares.

What Constitutes a Disqualifying Disposition (IRC 421(b))

Under IRC 421(b), a disqualifying disposition occurs when an employee disposes of ISO shares before satisfying both of the holding periods required for qualifying ISO treatment under IRC 422(a)(1): at least two years from the date the option was granted, and at least one year from the date the option was exercised. If the employee sells or otherwise transfers the shares before either holding period is complete, the disposition is disqualifying. A gift of ISO shares before both holding periods are met is also a disqualifying disposition. There is no cure or remediation available after a disqualifying disposition occurs.

Ordinary Income on a Disqualifying Disposition

On a disqualifying disposition, the employee recognizes ordinary income equal to the lesser of:

1. The spread at exercise: The excess of the stock's fair market value on the date of exercise over the exercise price (both as reported on Form 3921 for the exercise year).
2. The actual gain: The excess of the amount realized on the sale or disposition over the exercise price. If the shares are sold at a loss relative to the exercise price (sale price is below exercise price), no ordinary income is recognized.

Any gain above the ordinary income component (the excess of the sale price over the FMV at exercise) is capital gain, either long-term or short-term depending on the holding period from the exercise date to the sale date. Confirm all disqualifying disposition computation mechanics with IRC 421(b) and current IRS.gov guidance.

W-2 Reporting for Disqualifying Dispositions

The ordinary income element of a disqualifying disposition must be reported as wages on Form W-2 in the year of the disposition -- not the year of the ISO exercise. The ordinary income amount is includable in boxes 1, 3, and 5 of Form W-2 for the year of the disqualifying disposition. The employer is entitled to a deduction under IRC 83(h) equal to the ordinary income recognized by the employee. Confirm the current W-2 reporting mechanics for disqualifying dispositions (including whether box 12 code V reporting is applicable) with the current IRS instructions for Form W-2 and IRS.gov. See the employment tax and worker classification practitioner guide for the payroll tax framework governing wages reported on Form W-2.

FICA Taxes and Withholding on Disqualifying Dispositions

While no income tax withholding was required at the time of the ISO exercise, FICA taxes (Social Security and Medicare) are due on the ordinary income element of a disqualifying disposition if the employer is notified of the disposition. The employer's withholding obligation with respect to disqualifying dispositions -- including the mechanics of collecting FICA on income recognized after the exercise date -- is a fact-specific question that depends on when notification is received and the employer's ability to collect from the employee. Confirm the employer's withholding mechanics and obligations upon notification of a disqualifying disposition with current IRS.gov guidance and W-2 instructions.

Same-Day Sales: A Common Disqualifying Pattern

The most common disqualifying disposition pattern is a same-day exercise and sale: the employee exercises the ISO and immediately sells the shares in a broker-assisted transaction. Because the shares are sold on the date of exercise, neither the two-year-from-grant nor the one-year-from-exercise holding period is satisfied. The entire transaction collapses into a single day; the ordinary income element equals the spread (FMV at exercise minus exercise price), and any additional gain from the exercise date to the sale date is zero or minimal. Employers should treat every same-day ISO exercise-and-sale as a disqualifying disposition for W-2 reporting purposes.

Employer Tracking Challenge and Notification Policies

The employer does not receive automatic notification when an employee makes a disqualifying disposition. The IRS does not alert the employer; the brokerage that executes the sale does not routinely inform the employer. This creates a structural gap: the employer has a W-2 reporting obligation for the year of the disqualifying disposition, but only if and when the employer learns that the disposition occurred.

Best practice is to require employees to notify the employer's equity administrator or HR function in writing within 30 days of any sale, gift, or other disposition of ISO shares that may be a disqualifying disposition. Many equity plan platforms and third-party equity administrators now offer brokerage notification agreements that automatically alert the employer when covered shares are sold at the custodian. Employers should implement one or both mechanisms and make the notification obligation a term of the option agreement itself.

Section 6: ESPP Tax Treatment and the Form 3922 Connection

Form 3922 serves the same foundational data-supply role for ESPP participants that Form 3921 serves for ISO holders. Without Form 3922, employees who later sell ESPP shares cannot reliably determine whether their disposition is qualifying or disqualifying, or compute the income components correctly.

What Form 3922 Covers: Qualified IRC 423 ESPPs Only

Form 3922 applies only to employee stock purchase plans that qualify under IRC 423. A qualified IRC 423 ESPP allows employees to purchase employer stock at a discount through payroll deductions. The discount cannot exceed 15% of the stock's fair market value (confirm the 15% discount limit with IRC 423(b)(6) and IRS.gov; this limit may have been modified). Employees pay no income tax at the purchase date under a qualifying plan.

Non-qualified stock purchase arrangements -- plans that do not meet all IRC 423 requirements -- generate ordinary income at purchase; those purchases are reported through ordinary W-2 procedures and do not trigger a Form 3922 obligation.

The Offering Period, Purchase Date, and Form 3922's Trigger

Under a qualified ESPP, employees elect to have payroll amounts withheld during an offering period. At the end of the offering period (or at the purchase date within an offering period), the withheld amounts are used to purchase employer stock at the plan-specified price, which is typically the lower of the stock's fair market value at the beginning of the offering period (the offering date) or the purchase date, reduced by the plan's discount. This purchase is the "first transfer of legal title" under IRC 423(c) that triggers the Form 3922 filing obligation.

Form 3922 is filed for the year of the purchase (the first transfer of legal title), regardless of when the employee sells the shares. An employee who purchases ESPP shares in 2025 and holds them until 2030 receives a Form 3922 relating to the 2025 purchase year; no Form 3922 is filed in 2030 when the shares are eventually sold.

No Income at Purchase Under a Qualifying IRC 423 Plan

No regular income tax is imposed at the date of purchase under a qualifying IRC 423 plan. This parallels the ISO rule at exercise: the employee acquires the stock at a discount without immediate income recognition. The income recognition question is deferred until the employee sells or otherwise disposes of the shares.

Qualifying Disposition of ESPP Shares

A qualifying ESPP disposition requires the employee to hold the shares for both: (1) more than two years from the offering date (the date the option was granted); and (2) more than one year from the exercise date (the purchase date). If both holding periods are met, the income on disposition is computed as follows under IRC 423(c):

1. Ordinary income: The LESSER of (a) the bargain element at the offering date (the FMV at the offering date minus the exercise price paid); or (b) the actual gain (the sale price minus the exercise price paid). This lesser-of rule limits the ordinary income element even if the stock has appreciated significantly.
2. Remaining gain: Any gain above the ordinary income amount is long-term capital gain.

The critical data point is the fair market value of the stock on the offering date -- a figure the employee cannot determine independently without the employer's records. Form 3922 reports this figure directly. Without Form 3922, an employee who held ESPP shares for the qualifying period and then sold them years later would have no reliable way to compute the IRC 423(c) ordinary income component. Confirm all qualifying disposition tax mechanics with IRC 423(c) and current IRS.gov guidance.

Disqualifying Disposition of ESPP Shares

If the employee sells ESPP shares before satisfying both holding periods (more than two years from the offering date and more than one year from the purchase date), the disposition is a disqualifying ESPP disposition. On a disqualifying ESPP disposition:

1. Ordinary income: The spread at the purchase date (FMV at purchase minus the exercise price paid) is ordinary income, regardless of the sale price. This amount must be reported on Form W-2 in the year of the disqualifying disposition.
2. Remaining gain or loss: Any gain above the ordinary income amount (the excess of the sale price over the FMV at purchase) is capital gain (long-term or short-term depending on the holding period from the purchase date to the sale date). If the sale price is below the FMV at purchase, there may be a capital loss.

The employer must report the ordinary income element on Form W-2 for the year of the disqualifying disposition. The FMV at the purchase date (needed to compute this ordinary income) is one of the data fields on Form 3922. Confirm all ESPP disqualifying disposition W-2 reporting mechanics with the current IRS instructions for Form W-2 and IRS.gov.

Section 7: Practitioner Checklist and Compliance Calendar

The following checklist and calendar are structured around the natural workflow for employers with ISO plans and qualified ESPPs. Confirm all deadlines and procedural requirements with current IRS.gov guidance and the current year's form instructions before advising clients.

Before Year-End (October through December)

• Identify all ISO exercises that occurred during the calendar year. Each exercise triggers a Form 3921 obligation. There is no minimum number of exercises below which the obligation is excused.
• Identify all first ESPP transfers (purchase dates) that occurred during the calendar year. Each purchase under a qualified IRC 423 plan triggers a Form 3922 obligation.
• Verify that all required data fields are available in the equity compensation platform for each exercise and purchase: grant date, exercise date, FMV at exercise, exercise price, number of shares, and (for ESPP) offering date and FMV at offering date.
• Review the employer's aggregate information return filing count (Forms 3921, 3922, W-2, 1099, and all other types in aggregate) to determine whether the 10-return e-file threshold is met. Confirm the current threshold with IRS.gov.
• Review any employee disposition notifications received during the year for ISO disqualifying dispositions. Coordinate with payroll to ensure the ordinary income element of any disqualifying disposition is reflected on Form W-2 for the year of the disposition.

January: Preparation and Internal Review

• Pull final exercise and transfer records from the equity compensation platform for the prior calendar year.
• Verify all required data fields against source documents (plan records, board resolutions granting options, brokerage records, and equity platform data).
• Prepare draft Forms 3921 and 3922. If using an equity plan platform or third-party administrator, confirm that the forms generated by the platform are consistent with the current year's form instructions. Confirm all data fields with the current Form 3921 and Form 3922 instructions from IRS.gov.
• Coordinate W-2 reporting with the payroll team for any ISO disqualifying dispositions reported during the prior year. The ordinary income element must appear in the W-2 for the year of disposition, not the year of the ISO exercise.

January 31: Employee Copies Due

• Furnish employee copies of Form 3921 (for each employee who exercised ISOs in the prior calendar year) and Form 3922 (for each employee who purchased ESPP shares in the prior calendar year) by January 31. Delivery may be by mail or secure electronic means; confirm permissible delivery methods with IRS.gov.
• If a Form 8809 extension of time to furnish recipient copies is needed, confirm the availability and required filing timing with the current Form 8809 instructions and IRS.gov.

February 28 (Paper Filers): IRS Copies Due

• Paper filers (those required to file fewer than 10 information returns in aggregate, if eligible to paper file) must transmit IRS copies of Forms 3921 and 3922 to the IRS by February 28. Confirm the paper filing address and any current paper filing procedures with IRS.gov.
• Confirm whether the employer's aggregate return count requires e-filing; if the employer must e-file, the February 28 date is not the applicable deadline and paper filing would itself be a compliance failure.

March 31 (Electronic Filers): IRS Copies Due

• Electronic filers must transmit IRS copies of Forms 3921 and 3922 by March 31. Electronic filing is through the IRS Filing Information Returns Electronically (FIRE) system. Confirm current FIRE system requirements, transmitter codes, and any required test transmissions with IRS.gov before filing.
• Retain confirmation of successful IRS acceptance of the electronic transmission. IRS acceptance is not immediate; build in sufficient time before the March 31 deadline to resolve any transmission errors.

Ongoing: Notification Policy and Tracking

• Implement a written employee notification policy requiring employees to notify the equity administrator within 30 days of any sale, gift, pledge, or other disposition of ISO shares that may be a disqualifying disposition. Include this requirement in option agreements and plan documents.
• Implement a comparable notification policy for ESPP participants regarding any disposition of ESPP shares before both required holding periods are satisfied.
• Retain copies of all filed Forms 3921 and 3922 for a period consistent with the applicable statute of limitations for information return failures; confirm the required retention period with IRS.gov and with the IRC 6501 rules applicable to information return failures. See the IRC 6501 audit statute of limitations guide for the general framework governing assessment deadlines and information return obligations.

Frequently Asked Questions: IRC 6039, Forms 3921 and 3922

Related Guides

Files searched and found or not found in the production site directory:

• irc-422-iso-nso-incentive-stock-options-compensatory-equity-amt-practitioner-guide.html -- FOUND, linked
• employment-tax-worker-classification-irc-3121-section-530-relief-irc-3509-practitioner-guide.html -- FOUND, linked
• payroll-tax-basics-tax-preparers-small-business-clients-941-940-w2.html -- FOUND, linked
• payroll-tax-compliance-form-941-deposit-schedule-irc-6656-guide.html -- FOUND, linked
• irc-6501-audit-statute-of-limitations-practitioner-guide.html -- FOUND, linked
• irc-1202-qualified-small-business-stock-qsbs-gain-exclusion-active-business-practitioner-guide.html -- FOUND, linked
• 1099-information-return-penalties-tax-preparer-guide.html -- FOUND, linked
• camt-corporate-alternative-minimum-tax-form-4626-practitioner-guide.html -- FOUND, linked
• irc-1244-small-business-stock-ordinary-loss-qsbs-planning-practitioner-guide.html -- FOUND, linked in Related Guides
• form-w-2.html or w2.html (standalone W-2 guide) -- NOT FOUND (W-2 content covered by employment-tax and payroll guides above)

• IRC 422 ISO and NSO Compensatory Equity: AMT, Disqualifying Dispositions, IRC 83, and IRC 409A Guide -- The companion guide to this one. Covers the full ISO and NSO tax lifecycle (grant, exercise, qualifying and disqualifying dispositions), the AMT disaster scenario, the IRC 83(b) election, and the IRC 409A option trap. Form 3921 (covered here) provides the exercise-year data that feeds the analysis in that guide.
• Employment Tax, Worker Classification, IRC 3121, Section 530 Relief, and IRC 3509 Guide -- Governs the FICA and FUTA treatment of ordinary income from ISO disqualifying dispositions and ESPP disqualifying dispositions reported on Form W-2. The payroll tax framework here determines the employer's withholding and deposit obligations when a disqualifying disposition notification is received.
• Payroll Tax Basics: Forms 941, 940, and W-2 for Tax Preparers and Small Business Clients -- Covers the Form W-2 reporting and Form 941 deposit mechanics that apply when an employer must include disqualifying disposition income on an employee's W-2. Relevant to employers that discover a prior-year disqualifying disposition and need to file amended Forms 941 or W-2c.
• Payroll Tax Compliance: Form 941 Deposit Schedule and IRC 6656 Failure-to-Deposit Penalty Guide -- If an employer receives notification of an ISO disqualifying disposition after payroll has already been processed for the year, the employer may face a catch-up FICA deposit obligation. The IRC 6656 failure-to-deposit penalty framework governs the consequences of late payroll tax deposits and is relevant to employers managing retroactive disqualifying disposition payroll adjustments.
• Information Return Penalties: IRC 6721 and 6722 Guide for Tax Preparers -- The penalty regime for failures to file Forms 3921 and 3922 (IRC 6721 for the IRS copy, IRC 6722 for the employee copy) is covered in detail in this guide. Includes penalty abatement strategy under IRC 6724(a) reasonable cause and the de minimis exception under IRC 6721(c).
• IRC 6501 Audit Statute of Limitations Practitioner Guide -- The failure to file an information return (such as Form 3921 or Form 3922) can extend or affect the applicable statute of limitations for IRS assessment. The six-year limitations period for substantial omissions of income and the impact of information return noncompliance on assessment deadlines are addressed in this guide. Relevant to any employer considering retroactive correction of missing Form 3921 or 3922 filings.
• IRC 1202 Qualified Small Business Stock (QSBS): OBBBA Guide -- Employees and founders who exercise ISOs in qualifying C corporations may hold stock that also qualifies for the IRC 1202 gain exclusion on a later sale. The interaction between IRC 422 ISO holding periods and the IRC 1202 five-year holding period requires careful analysis; both Form 3921 (which records the exercise date) and the original stock issuance records are relevant to the IRC 1202 qualification analysis.
• IRC 1244 Small Business Stock Ordinary Loss and QSBS Planning Guide -- Employees who hold ISO shares or ESPP shares in a qualifying small business corporation may be eligible to treat a loss on the sale of those shares as an ordinary loss (rather than a capital loss) under IRC 1244. The IRC 1244 ordinary loss election interacts with the disqualifying disposition rules and with the employee's basis in ISO shares; confirm the interaction with IRC 1244 and IRS.gov.