TSAs are most commonly used in carve-out transactions – situations where a buyer is acquiring a business line, division, or subsidiary rather than an entire company. In a full-company acquisition, a TSA is typically unnecessary because the buyer is obtaining a self-sufficient organization (all assets, people, systems, and processes transfer to the buyer). However, when only part of a company is sold, that part often lacks stand-alone capabilities. For example, the carved-out unit might have been relying on the parent company’s corporate functions (IT systems, HR, accounting, supply chain, etc.) and cannot operate independently on Day 1. In such cases, a TSA is vital. It legally binds the seller to continue providing those essential services so the business can function post-close. Without a TSA, either the closing would have to be delayed until a full separation is ready (often impractical), or the business would suffer operational breakdown immediately after closing.
Industries and deal structures that frequently employ TSAs include: any sector with integrated operations where carve-outs occur. TSAs are common in manufacturing and industrials, where a divested plant or product line might still depend on the parent’s supply chain, regulatory licenses, or engineering support. For instance, in a medical device deal, if a buyer acquires a product line but has no factory ready, the seller might agree under a TSA to continue manufacturing the product for a period of time. They are also prevalent in consumer goods and retail carve-outs – e.g. the sale of a brand or division might require the former owner to keep providing distribution, IT, or retail operations support for a transitional period. Technology and software businesses also use TSAs, especially if a divested unit shares IT systems or data centers with the parent company; the seller may need to host the IT services until the buyer migrates to its own systems. Financial services and healthcare deals often involve TSAs due to heavy regulatory and systems integration – for example, separating customer data, licenses, or compliance functions takes time. In general, any deal where the acquired business was deeply intertwined with the seller’s organization is likely to need a TSA. In practice, TSAs have been seen in everything from industrial conglomerate break-ups to pharma spin-offs, whenever a clean break at closing is not feasible.
It’s worth noting that TSAs are not one-size-fits-all and can vary widely in scope and duration depending on the transaction. Some transitions are very short-term and narrow (e.g. a few critical services for a month or two), whereas others are extensive. Typical TSA duration ranges from a few months up to about a year. Many deals target ~6 to 12 months as the “sweet spot” for the transition period, with 12–18 months common in more complex separations. Extensions are sometimes negotiated if the buyer needs more time, though sellers often build in fees or conditions for extending beyond the initial term. Longer TSAs (e.g. multi-year arrangements) are less common, but do occur in especially complex carve-outs – for example, a multibillion-dollar carve-out with a multi-year TSA in numerous functional areas. In such long-term cases, the TSA starts to resemble a standard outsourcing or services contract, and parties must address more detailed service levels and compensation for the prolonged period.
Regulatory-driven TSAs: In some cases, TSAs are not just a choice by buyer and seller but a requirement of regulators or agreed remedies in order to consummate a deal. Antitrust authorities, for instance, may require a seller to provide transition services to the buyer of divested assets to ensure that the divested business remains viable and competitive post-sale. A notable trend has been regulators insisting on TSAs (with the power to approve their terms) when forcing divestitures – the U.S. Department of Justice has, in certain consent decrees, mandated TSAs and even reserved rights to approve any changes or extensions. This underscores how crucial TSAs are seen in protecting continuous operations of carved-out assets in the public interest (e.g. ensuring customers aren’t harmed by a disruption when a division is sold for antitrust reasons).
In summary, TSAs are used whenever a deal involves separation of a business that cannot immediately stand on its own. They are especially common in carve-outs across many industries – manufacturing, technology, retail, healthcare, energy, etc. – and they serve as the mechanism to bridge the gap between the old owner and new owner, providing whatever interim support is needed to make the transaction successful. If a business is fully self-sufficient and transferred intact, a TSA isn’t needed; but if any dependency will continue post-close, a TSA is the typical solution to manage that dependency in a contractually sound way.
