Corporate Carve-Outs Explained: How TSAs, Stranded Costs and Dis-Synergies Decide Whether the Discount Is Worth It
Michael King, PE Investment Manager · 10 min read ·
- A carve-out sells a business unit that has never existed as a standalone company. It shared finance, IT, HR, procurement and treasury with a parent, so the profit shown in the group accounts is not the profit it would earn alone. The whole exercise is rebuilding that fiction into a number a buyer can underwrite
- The gap is large and it is where the money is. If the group allocated £15m of central costs to a division that will cost £25m to run on its own, standalone EBITDA is £10m below the marketed figure — and at a 9x multiple that £10m is £90m of enterprise value, argued before a line of the SPA is drafted
- Two things bridge the gap and both are traps. The TSA (transition services agreement) is the parent running the orphaned functions for 12–24 months while the buyer stands up its own — cheap certainty that becomes an expensive dependency if the exit slips. Separation costs — one-time stand-up, dis-synergies, stranded costs — typically run 1–5% of revenue, and up to ~13% for a deeply integrated business
- Buyers demand a carve-out discount — a 2–5% separation-risk haircut, plus 5–15% for complexity — but that discount is priced compensation for a hard job, not free alpha. It only becomes a return for the buyer who can actually execute the separation. For everyone else it is a fair price for work they cannot do
A Carve-Out Sells a Business That Has Never Existed on Its Own
A carve-out is the sale of a division, subsidiary or product line out of a larger parent — a conglomerate pruning a non-core arm, a corporate raising cash, an activist forcing a break-up. It is not the sale of a company. It is the sale of a piece of one, and that distinction is the entire subject.
A standard M&A target is already a legal entity with its own accounts, its own finance team, its own IT and its own bank relationships. A carve-out target has none of that as its own. It has been sharing the parent's central functions — often the parent's customer contracts, systems and even staff — for its whole life. On the day it is sold it has to become a company, and someone has to pay for that.
This is why a carve-out is one of the messier processes in M&A, and why the same asset draws a lower price from a parent than it would as a clean, freestanding business. The discount is not a bargain hiding in plain sight. It is the market pricing the fact that the buyer is not buying a company — it is buying the right, and the obligation, to build one.
Carve-Out Financials: The Group Number Is Not the Standalone Number
The first thing a buyer distrusts is the EBITDA, because the way a parent allocates shared costs to a division rarely reflects what that division would actually pay to run alone. Carve-out financials — the standalone or "as-if" accounts a seller prepares — are an attempt to answer that, and the buyer's diligence is an argument about whether they go far enough.
The mechanics mirror a Quality of Earnings exercise, but in reverse. A QoE strips optimistic add-backs out of an inflated EBITDA; a carve-out diligence adds real standalone costs in, because the group number omits them. Both land at the same destination — a maintainable figure the buyer will pay a multiple on — and in a carve-out the omitted cost is where a disciplined buyer claws back price.
The TSA Is a Bridge and a Trap
No buyer can stand up a finance system, an ERP, a payroll and a set of vendor contracts on completion day, so the parent keeps running them for a while under a transition services agreement. The TSA is the plumbing that lets a carve-out close before the buyer is ready to operate — and it is the single most underrated risk in the deal.
A TSA typically runs 12 to 24 months, priced at the parent's cost plus a margin, covering IT, finance, HR, and sometimes procurement or logistics. It is a bridge: it buys the buyer time to build permanent capability. It is also a trap, because the parent has every incentive to exit the relationship and none to make it comfortable, and every month of overrun is a month of paying a former owner to run your business at a mark-up.
The value is in getting off it. PwC and others have found that exiting TSAs early is where a meaningful share of a carve-out's value uplift comes from — of the 8–11% uplift a well-run separation can add, roughly 5–7% comes from cutting the TSA short. The buyer who treats the TSA as a deadline to beat captures that; the buyer who treats it as a comfort blanket pays for the parent's overhead twice.
Stranded Costs, Dis-Synergies, and the Four Buckets of Separation Cost
The cost of turning a division into a company is not one number, and lumping it together is how buyers underestimate it. It sorts into four buckets, and each behaves differently — some are one-time cash, some are permanent drags on the margin.
| Bucket | What it is | Nature |
|---|---|---|
| One-time separation costs | Standing up IT and ERP, legal-entity setup, rebranding, severance, relocating people and operations, adviser fees | Cash, up front. Roughly 1–5% of revenue, up to ~13% for a deeply integrated carve-out. Hits equity returns, not the headline EBITDA multiple |
| Transitional service costs | The TSA fees paid to the parent while its systems still run the business | Temporary. Cost-plus, for 12–24 months. Ends only when the buyer builds its own capability — so it is a cost of speed, not a permanent one |
| Dis-synergies | Lost scale in shared services and procurement, underutilised facilities, lost cross-selling to the rest of the group | Permanent. A recurring margin drag that lowers standalone EBITDA for good — the mirror image of the synergies a strategic buyer models on the way in |
| Stranded costs | The parent's problem: overhead the divested unit used to absorb that does not shrink when it leaves | Seller-side. Explains why sellers push hard for a clean exit and a fast TSA wind-down — the longer the tail, the longer they carry cost against a smaller base |
The Carve-Out Discount Is Priced Compensation, Not Free Alpha
Buyers routinely pay less for a carve-out than for the equivalent standalone business, and it is tempting to read that discount as an inefficiency to be harvested. It is usually the opposite — a fair price for a job most buyers are not equipped to do.
The discount has two components. A separation-risk discount of roughly 2–5% covers the things that can go wrong on the way to a clean break — an IT cutover that slips, a regulatory approval that lingers, a TSA that overruns. On top of that, a complexity discount of anywhere from 5% to 15% reflects how entangled the unit is with its parent: the more shared infrastructure, the higher the number. Neither is generosity. Both are the buyer pricing risk it will have to carry.
The discount converts into return only for the buyer who can actually execute the separation on time and on budget. For a sponsor with a carve-out playbook and an operating team that has stood up standalone finance and IT before, the 10% discount is real value, because it can hit the separation plan the price assumes. For a buyer without that capability, the discount is exactly the compensation it will spend — and often overspend — building the company. The price is efficient; the edge is operational.
Why Carve-Outs Are a PE Favourite Despite the Complexity
If carve-outs are this messy, the obvious question is why private equity chases them — and the answer is that the mess is the moat. A clean, freestanding business in a competitive auction attracts every strategic and every sponsor, and the price reflects it. A carve-out narrows the field to buyers who can underwrite the separation, and a narrower field is a cheaper entry.
There is a value-creation angle too. A division inside a conglomerate is frequently under-managed — starved of capital, buried under group overhead, run to the parent's agenda rather than its own. Freed and given a dedicated management team and its own incentive package, it can grow faster as an independent company than it ever did as an orphan inside a group. That is the conglomerate discount in reverse: the sponsor buys the neglected unit at the group's blended, discounted multiple and re-rates it as a focused standalone business at exit.
The Verdict: The Discount Belongs to the Buyer Who Can Do the Separation
A carve-out is the clearest example in M&A of a price that is fair and an opportunity that is not evenly distributed. The financials are honestly discounted for a reason — the standalone cost is real, the separation cost is real, the dis-synergies are permanent, and the execution risk is genuine. Nobody is leaving money on the table.
The return comes from converting that discount into a business, and that is an operational skill, not a modelling one. The buyer who wins is the one who has rebuilt the standalone P&L honestly, sized the separation cost without flinching, and — above all — can get off the TSA early and stand up a real company. The discount is not the alpha. The capability to earn it is. For a student, that is the buy-sider's read: a carve-out is priced correctly for the market and mispriced only for the specific buyer who can do what the price assumes.
Careers: Carve-Outs Are Where Operational and Financial Diligence Meet
For an analyst or associate, a carve-out is the deal type that forces the two halves of diligence together. The financial workstream rebuilds the standalone P&L — stripping the parent's cost allocation and inserting the true standalone cost, the reverse of a QoE. The operational workstream — usually alongside a separations adviser — builds the TSA schedule, sizes the one-time costs, and maps every shared system that has to be untangled. Neither number means anything without the other.
Take Your Preparation Further
A carve-out touches almost every deal-execution topic at once, so read it alongside them. For the diligence that rebuilds the EBITDA, see Quality of Earnings; for the flip side of the dis-synergy maths, Synergies in M&A; and for why a parent trades below the sum of its parts in the first place, Sum-of-the-Parts Valuation. For how a messy target with no clean standalone balance sheet forces a particular price mechanism, see Locked-Box vs Completion Accounts, and for the diligence the seller runs to get ahead of all this, Vendor Due Diligence.
To structure the process end to end, download the free M&A Process Cheat Sheet, and for the full set of PE interview questions and model answers — including how to walk through a carve-out under pressure — see the PE Interview Masterclass.
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Frequently asked questions
What is a corporate carve-out?
A carve-out is the sale of a division, subsidiary or product line out of a larger parent company, rather than the sale of a whole standalone company. Because the divested unit shared functions like finance, IT, HR and procurement with its parent, it has to be turned into an independent business as part of the deal. That separation — and who pays for it — is what makes a carve-out different from, and more complex than, a standard acquisition.
What is a transition services agreement (TSA) in a carve-out?
A TSA is a contract under which the selling parent continues to run certain functions — typically IT, finance, HR and sometimes logistics — for the divested business for a period after completion, usually 12 to 24 months, at cost plus a margin. It lets the deal close before the buyer has built its own standalone capability. The value is in exiting it early: a large share of a carve-out’s value uplift comes from getting off the TSA ahead of schedule, because every month of overrun is a month paying the former owner to run your business at a mark-up.
Why is carve-out EBITDA different from the EBITDA in the group accounts?
Inside a group, a division shares central functions and is charged an allocated slice of the parent’s overhead that is often lower than what those functions would cost to run standalone. Once the unit is independent it must replicate its own finance, IT, HR, insurance and treasury — usually at a higher cost than the group allocation. Standalone EBITDA is therefore lower than the group number. Rebuilding the true standalone P&L, and inserting that cost uplift, is the core of carve-out financial diligence — the reverse of a Quality of Earnings exercise, which strips add-backs out.
What are stranded costs and dis-synergies?
Stranded costs are the parent’s problem: overhead the divested unit used to absorb that does not disappear when the unit leaves, now spread across a smaller remaining business. Dis-synergies are the buyer’s problem: the permanent loss of scale in shared services, procurement, facilities and cross-selling that a standalone business suffers. Dis-synergies matter most because they lower maintainable EBITDA for good, so they are multiplied by the exit multiple rather than paid once — a £4m recurring dis-synergy at 9x is £36m of value.
Why do private equity firms like carve-outs?
Two reasons. First, complexity narrows the buyer field: a messy carve-out that requires a real separation capability attracts fewer bidders than a clean standalone business, so entry is cheaper. Second, divisions inside a conglomerate are often under-managed and starved of capital, so a sponsor can buy the unit at the group’s discounted blended multiple, give it a dedicated team and incentives, and re-rate it as a focused standalone business at exit — the conglomerate discount captured in reverse. The catch is that the discount only becomes a return for a buyer that can actually execute the separation.