Tax Treatment of Breakup Fees When a Business Deal Falls Apart
What business buyers and sellers should know about termination payments and abandoned transaction costs
By Rosalind Talarico, EA, MST
A business acquisition can collapse after months of negotiations, legal work, financial review, and due diligence. When that happens, one party may owe a breakup fee, and both parties may be left with substantial transaction costs. The tax result is not automatic. Depending on the agreement and the structure of the transaction, the payment may produce an ordinary loss, a capital loss, or a cost that must be added to another completed transaction.
That distinction matters. An ordinary deduction may offset ordinary business income. A corporate capital loss generally can offset only capital gains, which may leave the business without a current tax benefit. Capitalized costs may not be recovered until a later transaction or disposition. The tax analysis should therefore begin before the parties sign the termination agreement or make the payment.
The contract label does not control the tax result
Calling a payment a breakup fee, termination fee, reimbursement, or liquidated damages does not determine how it will be taxed. The analysis starts with the legal rights and obligations that ended and the type of property involved in the proposed transaction.
Internal Revenue Code Section 1234A can convert a gain or loss from terminating certain contractual rights into capital gain or loss. The provision generally applies when the terminated right or obligation concerns property that is, or would have been, a capital asset in the taxpayer's hands. Stock is the clearest example. A failed asset acquisition is more complicated because a business may own a mix of capital assets, inventory, receivables, depreciable property, and other assets with different tax treatment.
The same transaction can therefore produce different results for the buyer, the seller, and the owners. It may also require an allocation among different categories of property rather than one answer for the entire payment.
Three possible tax outcomes
The facts typically point toward one or more of the following outcomes.
Ordinary loss or deduction Ordinary treatment may be available when the terminated obligations are primarily service related or facilitative, when the relevant property is not a capital asset, or when another provision allows an ordinary loss. The requirements must be established from the agreement and the underlying facts.
Capital loss If the payment results from terminating a right or obligation to acquire, sell, or transfer a capital asset, Section 1234A may require capital treatment. For a corporation, that can be especially costly because corporate capital losses generally offset only capital gains.
Capitalized cost A termination payment may have to be capitalized into a different completed transaction when the abandoned transaction and the completed transaction were mutually exclusive. This commonly arises when one deal is abandoned so another deal can proceed.
These categories are not interchangeable. A current deduction can reduce taxable income now, while a capital loss or capitalized cost may provide little or no immediate benefit.
What the AbbVie decision changed
A 2025 Tax Court decision illustrates why the contract itself matters. AbbVie entered into a cooperation agreement while pursuing a proposed combination with Shire. After Treasury issued guidance that threatened the expected tax benefits of the transaction, AbbVie's board withdrew its recommendation and AbbVie paid Shire a breakup fee of approximately $1.6 billion.
The IRS argued that Section 1234A converted the payment into a capital loss because the proposed transaction involved stock. The Tax Court disagreed. It concluded that AbbVie's obligations under the cooperation agreement were fundamentally service related. The agreement required AbbVie to pursue approvals, recommend the transaction, hold a shareholder vote, and perform other steps intended to help the transaction move forward. Those obligations were not themselves rights or obligations to transfer property.
The court therefore held that Section 1234A did not require capital loss treatment. The Commissioner appealed, but the Seventh Circuit dismissed the appeal in February 2026. The Tax Court decision remains important, but it is narrow. It does not establish that every breakup fee is deductible as an ordinary business expense. A contract that directly creates rights to purchase, sell, or transfer stock or other capital assets may produce a different result.
Questions to answer when a transaction fails
Business owners and their advisors should work through the following questions before reporting a termination payment or writing off deal costs.
What specific agreement, right, or obligation was terminated?
Was the failed deal structured as a stock purchase, asset purchase, merger, or reorganization?
What property would the taxpayer have acquired or transferred, and how would that property have been classified for tax purposes?
Who paid or received the termination fee, and in what capacity?
Which legal, accounting, valuation, financing, and due diligence costs were previously deducted or capitalized?
Did the taxpayer complete another transaction that could not have occurred unless the first transaction was abandoned?
Do the termination agreement, board minutes, correspondence, and accounting records support the claimed tax treatment?
The answers should be documented while the facts are fresh. Reconstructing the business purpose and contract mechanics several years later during an examination is expensive and often leaves important gaps.
Tax planning should occur before the termination payment
By the time a tax return is prepared, the parties have already signed the agreement, characterized the payment, completed the accounting entries, and sometimes pursued another transaction. That is too late to influence the documentation or evaluate whether a replacement transaction changes the answer.
The tax advisor should review the original acquisition documents, the proposed termination agreement, the transaction cost ledger, and any replacement transaction before the deal is formally abandoned. Transaction counsel should also be involved because the tax conclusion depends on the legal rights created and extinguished by the agreements.
The practical takeaway
A failed deal does not come with a standard tax answer. The amount of the fee is only the beginning of the analysis. The contract language, the taxpayer's role, the underlying property, the treatment of transaction costs, and the existence of another completed deal can all change the result.
Keystone Tax & Accounting works with business owners on acquisition and sale planning, purchase price allocations, transaction tax issues, and preclosing tax due diligence. If a proposed transaction is being restructured or abandoned, obtaining tax advice before the final documents are signed can protect deductions, improve the supporting record, and prevent an unpleasant surprise when the return is prepared.
Selected authorities
IRS Chief Counsel Advice addresses specific facts and may not be used or cited as precedent.
This article is for general educational purposes and does not constitute tax or legal advice. Tax consequences depend on the taxpayer's specific facts, agreements, and transaction structure.
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