IRS Form 8806: Filing Requirements, Deadline, and Penalties

IRS Form 8806 is the information return a domestic corporation files with the IRS after an acquisition of control or a substantial change in its capital structure, when the deal is worth at least $100 million and Section 367(a) of the Internal Revenue Code applies. The filing is due 45 days after the transaction closes, or by January 5 of the following year for late-year deals, whichever comes first. Missing it triggers per-return penalties under IRC Sections 6721 and 6722.

When Form 8806 Is Required

Three conditions have to line up before the filing obligation kicks in. All three, not any one.

First, the transaction has to be one of two types. An acquisition of control happens when another corporation gains at least 50% of the reporting corporation’s total combined voting power, or at least 50% of the total value of all classes of stock, through a single transaction or a series of related transactions, with shareholders receiving stock or other property in the deal. The 50% line is measured by comparing the acquirer’s ownership immediately before and immediately after. A large block trade that doesn’t push the acquirer across that line isn’t an acquisition of control for this purpose.¹

A substantial change in capital structure covers a wider set of events: a merger or consolidation, a transfer of all or substantially all assets to another entity, a transfer of assets in a Title 11 bankruptcy paired with distribution of the receiving corporation’s stock or securities, or a change in the corporation’s identity, form, or place of organization.²

Second, the $100 million threshold has to be met. For an acquisition of control, that’s the fair market value of the stock acquired, measured as of the date or dates it was acquired. For a capital structure change, it’s the total cash and fair market value of stock or other property distributed to shareholders, measured as of the date the cash or property is provided.¹ It’s a hard floor. A $99 million deal that satisfies everything else doesn’t require the form. In a phased transaction, the values from related steps aggregate.

Third, Section 367(a) must apply. The reporting corporation or any of its shareholders has to be required to recognize gain (if any) under Section 367(a) as a result of the transaction.³ Section 367(a) governs transfers of property by a U.S. person to a foreign corporation, so this condition effectively limits Form 8806 to cross-border restructurings involving a foreign corporation. Note the phrase “gain (if any)”: the form is required whenever 367(a) is the relevant provision, even if no actual gain results because basis exceeds value received.

When You Don’t Have to File

A purely domestic merger or acquisition, however large, doesn’t require Form 8806 if Section 367(a) never comes into play. That’s the biggest carve-out and the one most easily missed by teams that see the $100 million figure and assume the form applies.

The instructions add two more exceptions. The corporation doesn’t need to file if the transaction was properly reported under Section 6043(a), which covers corporate liquidations and dissolutions on their own dedicated returns. And it doesn’t need to file if it 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 isn’t a concern either. Even if a single investor crosses the 50% line through exchange purchases, the $100 million valuation floor and the 367(a) requirement would rarely be met that way.

Who Files

The filing obligation belongs to the “reporting corporation,” which is the domestic corporation whose control was acquired or whose capital structure changed. The acquirer doesn’t hold the primary responsibility. In an acquisition of control, the target files. In a capital structure change, the corporation that underwent the restructuring files.¹ The statutory authority sits in IRC Section 6043(c).⁴

The 45-Day Deadline

Form 8806 is due 45 days after the acquisition of control or the substantial change in capital structure. If that 45th day falls into the following year, an earlier deadline overrides it: January 5 of the year after the transaction. The corporation files by whichever date comes first.³

For a transaction closing December 1, the 45-day mark falls in mid-January, but January 5 arrives first. That leaves roughly a month to assemble shareholder data and complete the return, which is why late-year closings need advance planning.

Submission procedure has changed. The form can no longer be mailed. It must be sent by fax to 844-249-6232.³ Confirm the procedure before the deadline; this is unusual for an IRS return.

What Goes on the Form

Form 8806 collects the reporting corporation’s name, address, and EIN, and, for acquisitions of control, the same identifying information for the acquiring corporation or person. It requires a description of the triggering transaction, including the exact date, the fair market value of stock and property involved, and the percentage of stock acquired or changed.

The corporation must also report the names, addresses, and taxpayer identification numbers of shareholders who received cash, stock, or other property. In a large deal, collecting TINs is usually the most labor-intensive piece, and the corporation must make a good-faith effort to gather them. Starting before the transaction closes rather than after keeps the 45-day clock manageable.

The IRS expects supporting records to be retained for at least three years from the filing date, and longer where the transaction involves carryover basis property or where income could be understated by more than 25%.⁵

Form 1099-CAP and the Consent Election

A corporation that has to file Form 8806 also has to file Form 1099-CAP with the IRS and furnish a copy to each non-exempt shareholder who received cash, stock, or other property. That companion form gives shareholders what they need to report gain or loss on their own returns.⁶

A shareholder whose total cash plus fair market value of stock and other property received doesn’t exceed $1,000 is treated as an exempt recipient and doesn’t need a 1099-CAP.⁶

Form 8806 contains a consent election that can dramatically reduce the 1099-CAP workload. By making the election, the reporting corporation authorizes the IRS to publish basic transaction information: corporation name and address, transaction date, description of the affected shares, and amounts distributed per share.¹ When the election is made, the corporation isn’t required to file Form 1099-CAP for shares held through a clearing organization such as the Depository Trust Company.⁷ Since publicly traded shares are overwhelmingly held in street name through clearing organizations, the election can eliminate most of the 1099-CAP burden in a public-company transaction. Brokers who know or have reason to know about the transaction pick up the reporting on Form 1099-B for their customers.⁸

Penalties for Late or Missing Filings

Failure to file Form 8806 or Form 1099-CAP correctly and on time triggers penalties under IRC Sections 6721 and 6722.⁹ Section 6721 covers information returns filed with the IRS (Form 8806 and the IRS copies of 1099-CAP). Section 6722 covers the payee statements (the shareholder copies of 1099-CAP). Both use the same tiered structure.

For returns due in 2026, the amounts are:¹⁰

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

In a deal touching thousands of shareholders, per-return penalties compound fast. A corporation that misses the filing for 5,000 1099-CAP forms and doesn’t correct by August 1 is looking at more than $1.7 million before any intentional-disregard analysis.

Penalties can be waived where the corporation shows reasonable cause and not willful neglect. The IRS applies that standard narrowly. The corporation has to show it acted responsibly and that circumstances beyond its control caused the failure. Staffing gaps, missed internal handoffs, and unfamiliarity with the requirement rarely qualify. Documented good-faith TIN-solicitation efforts, a system outage, or a natural disaster stand on firmer ground.

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
Office of the Law Revision Counsel. 26 USC 6043 – Liquidating, etc., Transactions
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Internal Revenue Service. How Long Should I Keep Records?
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Internal Revenue Service. Instructions for Form 1099-CAP – Changes in Corporate Control and Capital Structure
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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
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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