Form 8937: A CPA’s Deep Dive into Reporting Organizational Actions Affecting Basis

ARUN KP

02/28/2026

  A professional tax setting featuring Form 8937 and financial documents for reporting organizational actions affecting basis.
Proper compliance with Form 8937 is essential for accurate cost basis reporting following corporate reorganizations.

In my 15 years of practice as a CPA, I have observed that few forms cause as much consternation for corporate treasury departments as Form 8937. Formally titled the “Report of Organizational Actions Affecting Basis of Securities,” this document is the linchpin of modern cost basis reporting. Since the enactment of the Energy Improvement and Extension Act of 2008, the IRS has significantly tightened the screws on how issuers communicate corporate actions tax consequences to both the government and their shareholders. Consequently, understanding the technical nuances of this form is not merely a matter of compliance; it is a matter of fiduciary responsibility to your investor base.

Purpose of Form 8937

The fundamental purpose of Form 8937 is to provide the IRS and shareholders with a standardized report of any organizational actions affecting basis of a specified security. When a corporation undergoes a structural change—be it a stock split, a merger, or a return of capital distribution—the tax basis of the underlying shares usually changes. If this change is not reported accurately, shareholders cannot calculate their capital gains or losses correctly upon a future sale. In addition, the IRS uses this data to cross-reference the information reported by brokers on Form 1099-B. In my experience, discrepancies between an issuer’s Form 8937 and a broker’s 1099-B are a primary trigger for unwanted IRS correspondence.

Who Must File

The mandate to file Form 8937 falls upon any domestic or foreign issuer of a “specified security” that takes an organizational action affecting the basis of that security. A specified security generally includes any share of stock in an entity organized as a corporation. Furthermore, this requirement extends to regulated investment companies (RICs) and real estate investment trusts (REITs). I often tell clients that the “who” is less about the size of the company and more about the nature of the security. If the action results in a quantitative change to the basis, the filing requirement is triggered. There is, however, an exception: if the issuer provides the required information on a public website in a specific format, the physical filing with the IRS may be waived, provided certain conditions are met.

Objective and Merit of the Form

The objective of this reporting regime is rooted in Internal Revenue Code (IRC) Section 6045B. Historically, the IRS struggled with “basis leakage,” where taxpayers would inadvertently (or intentionally) use an unadjusted basis for securities that had undergone splits or spin-offs, leading to underreported gains. The merit of Form 8937 lies in its ability to force transparency. By requiring the issuer to quantify the effect of the action, the IRS ensures that the corporate actions tax consequences are uniform across the entire shareholder base. This legislative intent effectively shifts the burden of technical tax analysis from the individual investor to the corporate entity that initiated the action.

Describing Different Sections

Navigating the IRS Form 8937 instructions requires a methodical approach to its two primary parts. Part I, “Reporting Issuer,” is relatively straightforward, requiring the issuer’s name, EIN, and contact information. However, Part II, “Organizational Action,” is where the technical heavy lifting occurs. This section requires the date of the action, the CUSIP number, and a detailed description of the action. Specifically, Line 14 asks for the quantitative effect on the basis, while Line 15 requires the calculation of the change. In addition, Line 16 asks for the IRC section(s) upon which the tax treatment is based. I frequently see errors in Line 16 where practitioners fail to cite the correct reorganization provisions, such as Section 368(a) or Section 355.

Conditions, Situations, and Major Provisions

Several complex scenarios necessitate the filing of Form 8937. The most common is the “Return of Capital” (ROC) distribution. When a corporation makes a distribution that exceeds its current and accumulated Earnings and Profits (E&P), the excess is treated as a non-taxable return of capital that reduces the shareholder’s basis. Other triggers include stock inversions, certain debt-to-equity swaps, and complex mergers where “boot” is involved. In addition, stock splits and reverse splits are classic organizational actions affecting basis. I often advise clients that even if an action seems “tax-free” under the IRC, it almost certainly requires a Form 8937 if the number of shares or the value per share is altered.

How To Complete Form

The professional workflow for completing Form 8937 should begin with a reconciliation of the E&P account. You cannot accurately report a basis adjustment without knowing the exact tax character of your distributions. Once the E&P is finalized, the tax department must coordinate with the legal and treasury teams to determine the “per share” impact. Consequently, the data entry should be supported by a technical tax memorandum. When filling out the form, ensure that the description in Part II is clear enough for a layperson to understand but technically robust enough to satisfy an IRS agent. I recommend including a sample calculation as an attachment to the form to provide maximum clarity to brokers and shareholders.

When To File & Procedure

The timing of Form 8937 is critical. The issuer must file the form (or post it to their public website) on or before the 45th day following the organizational action, or by January 15th of the year following the calendar year in which the action occurred, whichever is earlier. For example, if a stock split occurs on December 1st, the January 15th deadline takes precedence over the 45-day rule. In my practice, I have found that many companies miss the 45-day window for mid-year actions. Failure to adhere to these IRS Form 8937 instructions regarding timing can lead to significant headaches during year-end 1099 processing.

Extension of Time To File & Procedure

Unlike income tax returns, there is no standard Form 7004 or 4868 to grant an automatic extension for Form 8937. The reporting is event-driven. However, if an issuer is unable to determine the exact quantitative effect on basis by the deadline (common in E&P studies that aren’t finished), they should file based on reasonable estimates. The IRS allows for amended filings once the final data is available. It is important to distinguish that this is a “filing” requirement, not a “payment” requirement; therefore, the focus is entirely on the accuracy of the information provided rather than the remittance of tax.

Where To File

If you choose to file a physical copy, Form 8937 must be sent to the Department of the Treasury, Internal Revenue Service Center, Ogden, UT 84201-0054. However, the vast majority of my clients utilize the “Public Web Posting” option. Under Treasury Regulation Section 1.6045B-1(a)(3), an issuer is deemed to have satisfied the filing and reporting requirements if they post a completed, signed Form 8937 in a readily accessible format on their public website for 10 years. This is generally the preferred method as it simultaneously satisfies the requirement to notify the IRS and the requirement to notify shareholders.

Amending of the Form (Applicability)

Amending Form 8937 is necessary whenever the initial reporting is found to be incorrect or when “estimated” E&P figures are finalized. The procedure involves filing a new form with the “Amended” box checked at the top. The statute of limitations for these forms is generally tied to the underlying tax returns of the shareholders, but from a corporate standpoint, the goal is to correct the record before brokers issue 1099-Bs. If you discover an error after January 15th, you must act with extreme urgency to prevent a cascade of incorrect cost basis reporting across the entire brokerage industry.

Penalties of Non-Filing

The IRS does not take Form 8937 non-compliance lightly. Penalties are assessed under IRC Section 6721 and 6722. For the current tax year, the penalty for failure to file a correct information return can be as high as $310 per return, with a maximum penalty of over $3.7 million per year for large businesses. If the IRS determines “intentional disregard,” the penalty increases to $630 per return or 10% of the aggregate amount of the items required to be reported, with no maximum cap. I often use these figures to emphasize to CFOs that “reasonable cause” defenses are difficult to sustain if the company simply forgot the 45-day deadline.

CPA’s Professional Insights

The IRS typically scrutinizes Form 8937 during audits of high-net-worth individuals or large corporate reorganizations. One major red flag is a “Return of Capital” reported on a 1099-DIV that does not have a corresponding Form 8937 on the company’s investor relations page. In addition, I often tell clients to be wary of “deemed distributions” under Section 305(c). These are changes in conversion ratios or exercise prices that don’t involve cash but still affect basis. Many practitioners overlook these, but they are a favorite target for IRS agents looking for easy adjustments. Always ensure your tax department has a seat at the table during M&A discussions to identify these triggers early.

Conclusion

In summary, Form 8937 is a sophisticated reporting tool that requires a deep understanding of both corporate law and the Internal Revenue Code. From identifying organizational actions affecting basis to ensuring accurate cost basis reporting, the stakes are high. By following the IRS Form 8937 instructions and maintaining a rigorous internal workflow, corporations can avoid steep penalties and provide their shareholders with the clarity they deserve. As a veteran practitioner, I cannot stress enough the importance of proactive E&P analysis in this process.

Frequently Asked Questions (FAQ)

  • Does a standard 2-for-1 stock split require Form 8937? Yes, because it changes the per-share basis of the security, it is an organizational action that must be reported within 45 days.
  • What if our company has negative E&P? If you make a distribution while having negative E&P, the entire distribution is likely a return of capital, which necessitates filing the form to report the basis reduction.
  • Are foreign issuers exempt? No. Foreign issuers must file if the action affects the basis of a security held by U.S. taxpayers, unless the security is exempt under specific Treasury regulations.
  • How long must the form remain on our website? To satisfy the public disclosure exception, the form must remain accessible on your website for 10 years.
  • Can we use a summary statement instead of the form? No. The IRS requires the specific format of Form 8937, although you may attach additional spreadsheets or narratives to provide further detail.
ARUN KP
Author

Entrepreneur | Tax Journalist | India-US Tax Consultant & Professional Accountant. Connect with me on LinkedIn.

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