TLDR: A corporate carve-out looks like subtraction on the org chart but behaves like a full standalone build. The separations that protect value treat stranded costs, transitional service agreements, and the new entity’s cost structure as design decisions made before signing, not cleanup items left for after close. The evidence is specific: one-time separation costs typically run 1-6% of the divested unit’s value and can reach 13% in complex deals, unmanaged transitional service agreements stretch 12 to 24 months, and disciplined private equity carve-outs once earned nearly double the industry’s buyout returns. Neumarz advises boards, corporate development teams, and sponsors through this exact sequence, from separation blueprint to Day One readiness.
A Carve-Out Is Not a Smaller Copy of the Parent
Roughly two-thirds of S&P 500 companies now carry three or more business segments generating over $500 million in revenue each, the legacy of a decade of mega-mergers. Unwinding one of those segments is rarely a matter of drawing a box around a P&L and handing over the keys. The unit being separated has to inherit, rebuild, or rent an entire operating stack: finance, HR, procurement, IT, tax, treasury, and often manufacturing capacity it never owned outright. Boards that default to giving the new company (“NewCo”) a scaled-down replica of the parent’s (“RemainCo’s”) support functions tend to overpay for structure the standalone business does not need. Research into completed separations puts the gap between the most and least efficient general and administrative cost structures at 4 to 8 percent of revenue across industries, which is exactly the margin a well-planned carve-out can capture and a rushed one leaves on the table.
The instinct to clone the parent’s structure comes from a fear of business disruption. That fear is reasonable, but it is a planning problem, not a reason to avoid rightsizing. The businesses that separate well start by asking what NewCo actually needs to run, independent of what it used to consume as part of a larger portfolio.
The Stranded Cost Problem
Every separation leaves behind costs that do not travel cleanly with the divested unit. These are the so-called stranded costs: shared IT infrastructure, allocated overhead for legal and compliance, board and investor relations expense, and shared manufacturing lines that served multiple business units at once. They are difficult to estimate precisely and harder still to unwind, because much of the corporate overhead they expose was excessive well before the divestment was ever discussed.
Separation and disentanglement costs, measured across more than 50 divestitures, typically run 1 to 5 percent of the divested business’s revenue, with large and complex carve-outs reaching as high as 13 percent. Left unaddressed, stranded costs do not resolve themselves quickly. It can take the parent company up to three years to recover the margin it loses to residual overhead after a divestiture closes, according to McKinsey’s research on the topic. That is a long tail of value erosion for a transaction that was supposed to simplify the business, and it is precisely why stranded-cost modeling belongs in the separation blueprint rather than in a post-close cleanup workstream.
Transitional Service Agreements: A Bridge, Not a Crutch
A transitional service agreement, or TSA, lets the seller keep operating designated functions for the buyer for a defined period after close, buying time for NewCo to stand up its own systems. Used well, a TSA prevents Day One chaos. Used as a substitute for planning, it becomes an expensive dependency. TSAs typically run 12 to 24 months, with the heaviest reliance concentrated in IT and ERP systems, and companies that invest early in exit planning can compress that window to 6 to 12 months. Every additional month under a TSA carries a service fee, a dependency on a counterparty with fading incentive to prioritize the work, and a delay to the operational independence that is the entire point of the separation. TSA duration should be negotiated as a cost line with a deadline, not an open-ended safety net.
Why Private Equity Keeps Buying Carve-Outs
Corporate carve-outs have long been an active hunting ground for private equity, and the historical returns explain why. Before 2012, carve-outs acquired by financial sponsors generated an average multiple on invested capital of roughly 3.0x, well above the 1.8x average for buyouts overall. That gap has narrowed since, as competition for these assets intensified and pushed up entry prices: the average carve-out completed since 2012 has returned closer to 1.5x, while the volume of carve-out deals has fallen by about half to roughly 15 percent of total buyout activity. What has not changed is the ceiling. Top-quartile carve-outs still produce a 2.5x multiple, nearly matching the 2.7x earned by top-quartile buyouts of any kind, and sponsors that execute the operational separation with discipline continue to outperform. The dispersion between average and top-quartile results is itself the argument for treating carve-out execution as a specialist discipline rather than a variant of standard buyout playbooks.
Focus as a Value-Creation Lever
The reason carve-outs can create real value, for a strategic seller as much as a financial buyer, is that large diversified companies routinely impose mismatched operating requirements on business units with very different growth rates, margins, and capital needs. Separating those units lets each pursue a cost structure and capital allocation policy suited to its own business rather than to the average of the portfolio it came from. An analysis of more than 160 corporate separations with market capitalizations above $1 billion found that well-executed separations produced roughly 6 percent of excess shareholder return, blended across both resulting companies, in the two years following close, measured against each company’s own sector index. Over 60 percent of those transactions took longer than nine months from announcement to close, yet the analysis found no meaningful link between a longer timeline and weaker post-separation performance. Speed is not the variable that matters; the quality of the separation plan is.
The following benchmarks summarize what disciplined carve-out execution looks like against what an unmanaged one costs.
| Benchmark | Typical Range | Source |
|---|---|---|
| One-time separation costs (% of divested unit value) | 1%-6%, up to 13% in complex deals | BCG / EY-Goldman Sachs |
| Transitional service agreement duration (unmanaged) | 12-24 months | PwC |
| Time for parent to recover margin lost to stranded costs | Up to 3 years | McKinsey |
| Separations exceeding 9 months, announcement to close | Over 60% | EY-Goldman Sachs |
| Excess shareholder return, well-executed separations (2-year, blended) | ~6% vs. sector index | EY-Goldman Sachs |
| PE carve-out returns, pre-2012 vs. since 2012 (MOIC) | 3.0x vs. 1.5x average; 2.5x top quartile | Bain |
How Neumarz Executes Carve-Outs
Every figure above points to the same conclusion: the businesses that protect value in a separation are the ones that model stranded costs, negotiate TSA exit timelines, and design NewCo’s operating structure before signing, not after. Neumarz advises boards, corporate development teams, and financial sponsors through that full sequence in the Swiss and broader European market: separation feasibility and stranded-cost quantification, TSA structuring and exit planning, standalone cost-base design, and Day One operational readiness. Whether the mandate is a strategic divestiture, a sponsor-backed carve-out acquisition, or a spin-off preparing for the public market, the objective is the same one that separates the top-quartile outcomes from the average: a business that leaves its parent capable of standing entirely on its own, from the first day it does.
References
- EY / Goldman Sachs, “Strategies for successful corporate separations,” https://www.ey.com/en_gl/services/strategy-transactions/strategies-for-successful-corporate-separations
- McKinsey & Company, “The power of goodbye: How carve-outs can unleash value,” https://www.mckinsey.com/capabilities/strategy-and-corporate-finance/our-insights/the-power-of-goodbye-how-carve-outs-can-unleash-value
- McKinsey & Company, “The cost of (un)doing business,” https://www.mckinsey.com/capabilities/strategy-and-corporate-finance/our-insights/the-cost-of-undoing-business
- Boston Consulting Group, “Don’t Let Carve-Out Costs Compromise Value Creation,” https://www.bcg.com/publications/2021/beware-of-separation-costs-compromise-value-creation
- PwC, “How expediting transition service agreement exits can unlock deal value,” https://www.pwc.com/us/en/services/consulting/deals/library/tsa-exit.html
- Bain & Company, “PE-Backed Carve-Outs Used to Be Reliable Winners. So What Happened?” Global Private Equity Report 2025, https://www.bain.com/insights/pe-backed-carve-outs-global-private-equity-report-2025/
