Can Form 3921 and Form 3922 both apply in the same year?

Sometimes. The answer depends on the underlying transactions and the current IRS instructions. The two forms may report different sides of the same account or transaction, or completely different reporting events.

Form 3921 vs. Form 3922: ISO Exercises vs. ESPP Stock Transfers

Form 3921

3921

Exercise of incentive stock options under section 422(b).

Usually review this form when: Review Form 3921 when an employee exercises an incentive stock option and the transaction falls under the section 422 reporting rules.

3921 software Free 3921 CSV validator CSV template

VS

Form 3922

3922

Transfers of stock acquired through certain employee stock purchase plans under section 423(c).

Usually review this form when: Review Form 3922 when a corporation records a transfer of legal title to shares acquired through a qualifying employee stock purchase plan transaction described in section 423(c).

3922 software Free 3922 CSV validator CSV template

At a glance

How 3921 and 3922 differ

Use the transaction and filer role—not the similarity of the form numbers—to decide which IRS instructions to review.

Question	3921	3922
Primary reporting focus	Exercise of incentive stock options under section 422(b).	Transfers of stock acquired through certain employee stock purchase plans under section 423(c).
When to start here	Review Form 3921 when an employee exercises an incentive stock option and the transaction falls under the section 422 reporting rules.	Review Form 3922 when a corporation records a transfer of legal title to shares acquired through a qualifying employee stock purchase plan transaction described in section 423(c).
Free pre-upload check	3921 CSV Validator	3922 CSV Validator
Form-specific troubleshooting	3921 CSV Error Guide	3922 CSV Error Guide

The practical difference

Form 3921 reports the exercise of an incentive stock option under section 422(b). Form 3922 reports certain transfers of stock acquired through an employee stock purchase plan under section 423(c).

Both forms involve employee equity compensation, but the triggering event and plan type differ. The source data also differs, including grant/exercise details for 3921 versus option and transfer details for 3922.

When 3921 is the form to investigate

Review Form 3921 when an employee exercises an incentive stock option and the transaction falls under the section 422 reporting rules.

If 3921 appears to match the transaction, open the current IRS instructions before you build the filing file. Then use the 3921 CSV template as the controlled source layout, and run the final exported CSV through the free 3921 validator. The validator checks local structure and formatting; it does not make the tax-law decision for you.

When 3922 is the form to investigate

Review Form 3922 when a corporation records a transfer of legal title to shares acquired through a qualifying employee stock purchase plan transaction described in section 423(c).

If 3922 is the closer match, keep its data separate from 3921. Use the 3922 CSV template, validate the final file, and review the current IRS instructions before filing. Separate source files make it much easier to preserve the exact columns, box-level values, and form-specific fields required for each return.

Can both forms be relevant in the same year?

They can be, depending on the facts. In some comparisons, the two forms report opposite sides of one account or transaction; in others, they apply to entirely different payments. Do not choose a form merely because it has a similar name or because the same recipient appears in both data sets.

How to keep the software workflow clean

Identify the reporting event and the party responsible for filing.
Confirm the current IRS instructions for the form and tax year.
Use the exact form-specific CSV or Excel layout rather than a generic “1099” spreadsheet.
Keep 3921 and 3922 records in separate source files unless the software explicitly supports a controlled multi-form workflow.
Validate the final CSV after the last spreadsheet save so automatic formatting changes are caught before IRIS.

IRS sources

IRS instructions used for this comparison

This comparison is a navigation and preparation aid, not tax or legal advice. IRS forms, thresholds, exceptions, and filing rules can change. Use the current IRS instructions to make the final filing decision.

3921 vs. 3922 FAQs

Common questions about these two forms

What is the main difference between Form 3921 and Form 3922?

Form 3921 reports the exercise of an incentive stock option under section 422(b). Form 3922 reports certain transfers of stock acquired through an employee stock purchase plan under section 423(c).

When should I review Form 3921?

Review Form 3921 when an employee exercises an incentive stock option and the transaction falls under the section 422 reporting rules.

When should I review Form 3922?

Review Form 3922 when a corporation records a transfer of legal title to shares acquired through a qualifying employee stock purchase plan transaction described in section 423(c).

Can both forms apply in the same year?

Yes, in some situations. They may report different sides of a related transaction or separate reporting events. The current IRS instructions determine whether either or both forms are required.

Can 1099ERICH prepare both forms?

1099ERICH supports both 3921 and 3922. Use the dedicated software page, template, validator, and error guide for the form you are preparing.

Need the full workflow?

Prepare 3921 and 3922 records in 1099ERICH.

Import structured data, validate records, prepare recipient output where applicable, and create IRIS-ready filing files on Windows.

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