In many divestitures, tax is still treated as a specialist workstream brought in to optimize a structure after fundamental deal decisions have already been made.
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In practice, tax often helps determine whether those decisions are workable at all. That matters more and more when divestitures are tied to broader portfolio and transformation agendas rather than treated as isolated exits.
This broader point also reflects how tax leaders should be positioning tax for transaction readiness. In a divestiture,
Tax shapes the value story buyers underwrite
Tax affects value not only through leakage, but through confidence in the deal itself. When the possible legal entity structures have been carefully evaluated and well documented, the intended benefits (e.g., step-up in tax basis, transfer of tax attributes) are available, and the financial and tax facts are well organized, buyers can diligence the business faster and underwrite it with more confidence. According to the Global Divestiture Survey, 56% of both sellers and buyers say evaluating tax and legal entity structuring options is important or very important before a carve-out goes to market, and more than four in five in each group rate it at least moderately important.
That preparation shows up in outcomes as well. Survey findings further show that nearly half of sellers who received higher-than-expected value say tax optimization materially influenced the result. When value came in below expectations, sellers most often pointed to unavailable tax benefits, low-quality financial and tax information, and diligence or tax risk exposure. Buyers tell a similar story on the downside: When they paid less than expected, more than half pointed to unavailable tax benefits, and 58% cited diligence or tax exposure risks. Put simply, tax can influence value creation when the structure of the transaction can be mutually beneficial, and the facts underlying the tax profile are organized. It can narrow value just as quickly when buyers are left to price in uncertainty.
Tax readiness can accelerate or slow the deal
Tax also affects pace. Financial and tax information is often treated as a diligence deliverable, with survey findings suggesting it operates more as a timing lever.
Nearly half of sellers whose divestiture took longer than expected say weaker financial and tax information had a high or significant impact, and buyers report the same dynamic. The reverse also holds: Just over half of sellers whose divestiture moved faster than expected point to strong financial and tax information as a meaningful contributor, and buyers who moved faster cite high-quality information from the seller for the same reason.
Tax continues to shape outcomes after close
The same pattern continues after close. Tax and legal entity complexity was the most frequently cited continuing post-close challenge for both sellers and buyers in the survey, selected by 48% of sellers and 55% of buyers.
Tax also remains embedded in transition service agreements: 36% of sellers and 41% of buyers report tax among the services provided through TSAs or reverse TSAs. And 50% of sellers say tax-related execution costs increased one-time separation costs.
These are not minor technical loose ends. They suggest that tax decisions made before signing can influence how much friction both sides still carry once the transaction is complete.
What stronger tax leadership looks like across the deal life cycle
Viewed that way, effective tax leadership in a divestiture looks less like late-stage review and more like sustained involvement across the deal life cycle. In the strategy phase, tax should help analyze and assess perimeter choices, legal entity structure and the practical value implications of different transaction-structuring options. Ahead of a process start and diligence, tax should help compile relevant data to support the company’s tax profile: entity mapping, carve-out support, visibility into exposures, indirect tax implications and likely TSA dependencies.
During diligence and signing, tax should help present a clear fact pattern that buyers can follow and underwrite with less ambiguity, while supporting agreement positions with discipline. From signing to close, the work should stay connected to TSA design, tax registrations, legal entity operationalization, Day 1 planning, and the sequence of actions required to execute cleanly. After close, the role shifts toward reducing remaining dependencies and working through retained tax matters that could otherwise linger well beyond the transaction date.
For tax leaders, the most useful questions may be the simplest ones:
- Are we designing a tax and legal entity structure that is efficient and can be mutually beneficial?
- Do we have clear documentation that supports the overall tax profile of the business to be divested so a buyer can conduct due diligence efficiently and be confident in their ability to underwrite the transaction?
- What TSA or interim operating model arrangements will be needed to support the tax and legal entity structure choices for the transaction?
- Where could unresolved tax issues still affect timing, buyer confidence or one-time separation costs?
Many of the decisions that shape value, timing, buyer confidence and separation complexity have tax embedded in them well before signing. Sellers that bring tax in early are often better positioned to define a cleaner perimeter, support a more credible tax profile and buyer story, and reduce avoidable friction through closing and separation.
In a market where divestitures are becoming more strategic and more consequential, that’s not just a tax advantage. It’s a deal advantage.
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