File IRS Form 3921 Online | How to E-File Form 3921

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Form 3921: What You Need to Know

Form 3921, Exercise of an Incentive Stock Option Under Section 422(b), is used to report the transfer of stock resulting from an employee’s exercise of an incentive stock option under Section 422(b). The form includes details such as the date the option was granted, the date it was exercised, the exercise price per share, and the fair market value of the stock on the exercise date.

The corporation must file Form 3921 with the IRS and furnish the required copy to the employee who exercised the incentive stock option. The information reported helps the employee determine the tax treatment of the stock acquired through the
option exercise.

One Platform, Built for However You File Form 3921

Whether you're filing one form or ten thousand, TaxBandits fits the way you already work.

For Employers / Business Owners

Filing It Yourself

Filing your first Form 3921? We make
it easy.

Internal Audit Check
Real-Time TIN Matching
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Run every client's filing from one dashboard.

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Filing at Scale

Import data from your own systems and file
in bulk.

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Everything You Need for Filing
3921 Forms

Manage each stage of Form 3921 filing, from entering stock option details to delivering
employee copies, in one place.

CSV Upload

Use our CSV template to import your Form 3921 data in bulk.

Access Template

Address Book

Save corporation and employee information for use in future filings.

IRS Business Validation

Catch formatting errors against current IRS standards before you submit.

Smart Audit & Review

Check for missing information and potential filing issues before submitting your forms.

Share Forms for Review

Send draft Form 3921 forms to your team for review before filing.

Federal Filing

Submit Form 3921 to the IRS through one streamlined filing process.

Schedule Filing

Prepare forms ahead of time and select when to transmit them.

Free Retransmission

Correct a rejected return and retransmit it without additional filing fees.

10-Year Storage

Keep filed Form 3921 records securely accessible for ten years.

AI & Live Support

Get assistance from BanditAI or connect with a live support representative
when needed.

Postal Mailing

Mail employee copies directly and track them through delivery.

Recipient Portal Access

Provide employees with secure access to their Form 3921 online.

Smart Mail

Automatically send a physical copy when the online version remains unviewed.

Print & Mail Yourself

Download employee copies and handle printing and mailing internally.

Foreign Mailing

Send employee copies securely to employees located outside the U.S.

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Our Trusted Partners & Integrations for Form 3921 E-Filing

Connect with the tools you already use

Join 100,000+ businesses that trust TaxBandits for
Form 3921 filing

We file across several businesses and deadlines, and TaxBandits keeps all of it in one place. IRS compliance is easier to manage with validation, recipient delivery, and filing activity organized in a single workflow. That centralized view helps our team coordinate responsibilities, identify issues earlier, and keep each filing moving without relying on separate spreadsheets or disconnected status updates.

VP of Finance

Multi-entity tax advisory firm

Join 100,000+ businesses that trust TaxBandits for
Form 3921 filing

TaxBandits gives our team a structured way to manage Form 3921 filings across departments. Bulk processing, built-in validation, and employee copy delivery help us keep filing activity organized from preparation through filing. A centralized workflow gives our team better visibility, reduces manual follow-up, and makes it easier to stay on track during peak reporting periods.

Director of Tax Compliance

Higher education institution

Join 100,000+ businesses that trust TaxBandits for
Form 3921 filing

With TaxBandits, we can manage large filing volumes without adding manual steps to every client workflow. The API, bulk processing, and filing-status visibility make it easier for our operations team to stay on top of deadlines. We can monitor activity across clients more consistently, respond to exceptions faster, and keep the filing process moving during our busiest reporting periods.

VP of Payroll Operations

Enterprise payroll provider

Exclusive Tools Built for Tax Professionals and High-Volume Form 3921 Filing

When you're managing Form 3921 filings for multiple employers, keeping employee details, stock option information, and filing statuses
organized shouldn't require separate spreadsheets or manual tracking.

Bulk Filing

Import Form 3921 data through bulk templates, regardless of your filing volume.

Client Management

Monitor each client's Form 3921 filings and statuses from one centralized dashboard.

Branded Client Portal

Provide clients with a portal and communications customized to your firm's brand.

Team Management

Add team members and assign preparer, approver, and transmitter roles based on
their responsibilities.

Flexible Payment Options

Access volume-based pricing as your filing count increases, along with prepaid
credit options.

Custom Reports

Generate reports on team activity and client filings to monitor workflow and filing progress.

For high-volume filing, call (704) 684-4758 for custom pricing.

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What Information Is Required to E-File Form 3921 Online

Gather these details before you start, and e-file Form 3921 with TaxBandits in minutes.

Transferor Details

TIN, Name, Address

Employee Details

TIN, Name, Address

Incentive Stock Option Details

Date option granted and exercised
Exercise price per share
The fair market value (FMV) on the exercise date
The number of shares transferred
If other than Transferor, Name, Address, and TIN of Corporation whose stock is being transferred

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How to E-File Form 3921 Online with TaxBandits

TaxBandits lets you enter Form 3921 details, review the information, and complete filing through one streamlined workflow.

Import and Validate

Enter your Form 3921 information, then review built-in checks before submission.

CSV Templates

Integration Options

Copy-Paste

Bulk Upload

File with IRS

Submit Form 3921 to the IRS and monitor your filing status through the process.

3921

Validate & Review

Submit to IRS & State

Track Filing Status

Deliver Recipient Copies

Send employee copies by mail, through the online portal, or both.

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The Bandit Commitment

Ensuring Peace of Mind for Every
Form 3921 You File

Filing Form 3921 involves more than reporting stock option exercises. The Bandit Commitment reflects how TaxBandits supports your filing from preparation through completion.

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Getting the right data in

Review corporation, employee, and option details before submitting your Form 3921.
Guided, end-to-end compliance

IRS filing and employee copy delivery are managed together in one workflow.
No-cost corrections and retransmissions

Corrections and retransmissions are included at no
extra cost.
Money-back guarantee

If a Form 3921 cannot be accepted or was filed in duplicate, the filing fee is refunded.

Get the Industry's Best Pricing for Quick and Accurate 3921 Filing

Pricing per form based on volume

No. of Forms	1-10	11-100	101-250	251-500	501-2000
Federal Filing	$2.75	$1.75	$1.15	$1.00	$0.80

Add-on

Price

USPS Address Validation

FREE

TIN Matching

$0.35 / TIN

Online Access

$0.50/form

Postal Mailing

$1.85/form

Postal (International)

$4.99/form

Postal + Online (Combo) 10% OFF

$2.12/form

Calculate Your Federal Filing Cost

How many forms?

forms

1 10 100 250 500 2000+

Estimated Total

$2.75

For Bulk Filers

Filing more than 2,000 forms?

Frequently Asked Questions to File 3921 Online

Form 3921 is used to report the transfer of stock when an employee exercises an incentive stock option (ISO) under Section 422(b). Corporations must file Form 3921 with the IRS for each qualifying stock transfer and provide a copy to the employee.

A corporation must file Form 3921 if it transfers a share of stock to an individual pursuant to the exercise of an incentive stock option (ISO) under Section 422(b). The corporation must file Form 3921 with the IRS for each qualifying transfer and provide the required copy to
the employee.

The deadline to file Form 3921 with the IRS is March 1, 2027, if filing on paper, or March 31, 2027, if filing electronically.

The deadline to furnish Form 3921 to the recipient is February 1, 2027. Since January 31, 2027, falls on a Sunday, the deadline moves to the next business day.

The IRS may impose penalties for failing to file Form 3921 correctly and on time or for failing to provide the required employee statement. The penalty amount generally depends on how late the form is filed and whether the failure was due to intentional disregard.

Both forms report certain stock transactions involving employees, but they apply to different types of stock options. Form 3921 reports the transfer of stock following an employee's exercise of an Incentive Stock Option (ISO) under Section 422(b). Form 3922 reports the transfer of stock acquired through an Employee Stock Purchase Plan (ESPP) under Section 423(c).

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