IRS Form 8806: Filing Triggers, 45-Day Deadline & Penalties

IRS Form 8806 is the information return a domestic corporation files after an acquisition of control or a substantial change in its capital structure, but only when the transaction is worth at least $100 million and Section 367(a) of the Internal Revenue Code applies. The deadline is tight: 45 days after closing, or January 5 of the following year if that comes first. Filings go by fax, not mail.

What Triggers the Filing

Two kinds of corporate events can trigger Form 8806, and each has to clear the same dollar-and-cross-border test before the form is required.

The first is an acquisition of control. That means another corporation, through one transaction or a series of related transactions, ends up owning stock representing at least 50% of the reporting corporation’s total voting power or at least 50% of the total value of all classes of stock. The definition tracks IRC Section 304(c)(1), and the 50% line is measured by comparing the acquirer’s ownership immediately before and immediately after the deal. Shareholders of the acquired corporation must receive stock or other property.¹

The second is a substantial change in capital structure. A corporation has a change in capital structure when it merges or consolidates with another corporation, transfers all or substantially all of its assets to another entity, transfers assets in a Title 11 bankruptcy case and distributes stock or securities of the receiving corporation, or changes its identity, form, or place of organization.²

Both events share the same dollar floor. For an acquisition of control, the fair market value of the stock acquired must be $100 million or more, measured as of the acquisition date. For a capital structure change, the total cash and fair market value of stock or other property distributed to shareholders must reach $100 million or more, measured when the cash or property is provided. A $99 million transaction that satisfies every other condition does not trigger Form 8806.¹

The second gate is Section 367(a). The reporting corporation or one of its shareholders must be required to recognize gain (if any) under that section as a result of the transaction.³ Section 367(a) governs transfers of property by a U.S. person to a foreign corporation, so in practice Form 8806 attaches to cross-border restructurings. A purely domestic merger, no matter how large, does not require Form 8806 if Section 367(a) is never in the picture.

Note the phrase “recognize gain (if any).” The obligation runs whenever Section 367(a) applies to the transaction, whether or not any actual gain results. Even a shareholder whose basis exceeds what they received falls within the reporting net if 367(a) is the operative provision.

Who Files

The filing obligation sits with the reporting corporation: the domestic corporation whose control was acquired or whose capital structure changed.¹ In an acquisition of control, that is the target. In a capital structure change, it is the corporation that underwent the restructuring. The acquirer does not carry the primary filing responsibility.

The 45-Day Deadline

You have 45 days from the acquisition of control or substantial change in capital structure to file Form 8806. A separate cutoff applies to late-year transactions: January 5 of the year following the calendar year in which the transaction occurred. File by whichever date comes first.³

For a December 1 closing, 45 days would land around mid-January, but January 5 arrives first and controls. That leaves barely a month to collect shareholder data and complete the return, so late-year closings need advance planning.

How to Submit

Form 8806 can no longer be mailed. The IRS requires submissions by fax to 844-249-6232.³ This is unusual for an IRS return, so confirm the procedure before the deadline arrives rather than after.

What Goes on the Form

Form 8806 collects identifying information about the reporting corporation (name, address, and EIN) and, for acquisitions of control, the same identifying information about the acquiring corporation or person. It also asks for a detailed description of the triggering transaction: the exact date, the fair market value of stock and property involved, and the percentage of stock acquired or changed.

The reporting corporation also has to list the names, addresses, and taxpayer identification numbers of shareholders who received cash, stock, or other property. In a large transaction, TIN collection is often the most labor-intensive part of the job, and the corporation must make a good-faith effort to obtain them. Starting that work before closing rather than after is the difference between a manageable timeline and a scramble.

Form 1099-CAP for Shareholders

A corporation required to file Form 8806 must also file Form 1099-CAP with the IRS and furnish a copy to each shareholder who received cash, stock, or other property and who is not an exempt recipient.⁴ The companion form gives shareholders what they need to report any gain or loss on their own returns.

A shareholder whose total cash plus fair market value of stock and other property received does not exceed $1,000 is treated as an exempt recipient and does not need to receive Form 1099-CAP.⁴ Filers submitting 10 or more information returns of any type during the calendar year must file electronically.⁵

The Consent Election Shortcut

Form 8806 includes a consent election that can eliminate most of the 1099-CAP burden. By making the election, the reporting corporation authorizes the IRS to publish basic transaction information (name and address, transaction date, description of affected shares, and amounts distributed per share) so brokers can satisfy their own reporting obligations.¹

When the election is made, the corporation is not required to file Form 1099-CAP for shares held through a clearing organization such as the Depository Trust Company.⁶ Because publicly traded shares are overwhelmingly held in street name through clearing organizations, the election removes most of the filing volume in a large public transaction. Brokers who know or have reason to know about the transaction pick up the reporting through Form 1099-B for each affected customer.⁷

Penalties

Failure to file Form 8806 or Form 1099-CAP correctly and on time triggers penalties under IRC Sections 6721 and 6722.⁸ Section 6721 covers information returns filed with the IRS (Form 8806 and the IRS copies of Form 1099-CAP). Section 6722 covers the statements furnished to payees (the shareholder copies of Form 1099-CAP). Both use the same tiered structure.

For returns due in 2026:⁹

Corrected within 30 days of the due date: $60 per return, capped at $683,000 for large businesses (over $5 million in average annual gross receipts) or $239,000 for small businesses.
Corrected after 30 days but before August 1: $130 per return, capped at $2,049,000 for large businesses or $683,000 for small businesses.
Not corrected by August 1: $340 per return, capped at $4,098,500 for large businesses or $1,366,000 for small businesses.
Intentional disregard: $680 per return with no annual cap.

These are per-return penalties, and they compound quickly. Missing 5,000 Form 1099-CAP filings and failing to correct by August 1 can exceed $1.7 million before intentional disregard is even considered.

A corporation can avoid penalties by showing the failure resulted from reasonable cause rather than willful neglect. The IRS reads that standard narrowly. Staffing issues, missed internal handoffs, or unfamiliarity with the requirement generally do not qualify. A system outage, natural disaster, or documented inability to obtain shareholder TINs despite good-faith effort has a better chance.

When Filing Is Not Required

Two exceptions sit alongside the threshold and Section 367(a) conditions. A corporation does not need to file Form 8806 if the transaction was properly reported under Section 6043(a), which covers corporate liquidations and dissolutions on their own dedicated returns. And filing is not required if the corporation reasonably determines that every shareholder who received cash, stock, or other property qualifies as an exempt recipient under the regulations.³ Routine open-market trading, even where a single investor happens to cross the 50% line, will rarely meet the $100 million and Section 367(a) conditions and so falls outside the form’s reach.

1
eCFR. 26 CFR 1.6043-4 – Information Returns Relating to Certain Acquisitions of Control and Changes in Capital Structure
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GovInfo. 26 CFR 1.6043-4 – Information Returns Relating to Certain Acquisitions of Control and Changes in Capital Structure
3
Internal Revenue Service. Form 8806 – Information Return for Acquisition of Control or Substantial Change in Capital Structure
4
Internal Revenue Service. Instructions for Form 1099-CAP – Changes in Corporate Control and Capital Structure
5
Internal Revenue Service. Publication 1220 – Specifications for Electronic Filing of Forms 1097, 1098, 1099, 3921, 3922, 5498, and W-2G
6
Internal Revenue Service. Instructions for Form 1099-CAP
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Internal Revenue Service. About Form 1099-B, Proceeds from Broker and Barter Exchange Transactions
8
Office of the Law Revision Counsel. 26 USC 6721 – Failure to File Correct Information Returns
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Internal Revenue Service. 20.1.7 Information Return Penalties