Asset Deal vs Share Deal: Why the Buyer Wants One, the Seller Wants the Other, and Why UK Tax Usually Settles It
Michael King, PE Investment Manager · 9 min read ·
- In a share deal the buyer acquires the company's shares and inherits everything it owns and owes — every contract, employee, and hidden liability. In an asset deal the buyer cherry-picks specific assets and assumes only the liabilities named in the agreement
- The buyer's case for an asset deal is the tax step-up: it rebases the acquired assets to the price paid, generating fresh capital allowances and amortisation that shield future cash tax. A share deal leaves the company's existing tax base untouched
- The seller's case for a share deal is decisive in the UK. A corporate seller can escape tax on the gain entirely under the Substantial Shareholding Exemption; an individual pays a single Business Asset Disposal Relief charge of 18% on the first £1m. An asset deal double-taxes a corporate seller and costs 0.5% stamp versus up to 5% SDLT
- The tax asymmetry is why most UK private M&A completes as share deals. Sponsors buy the Topco shares and manufacture their tax shield through leverage, not a step-up. Asset deals return in distress, carve-outs, and where the buyer will not touch the target's history
Two Ways to Buy the Same Business, With Different Things Changing Hands
The choice is not cosmetic. In a share deal, the buyer purchases the shares of the target company from its shareholders. The company itself does not change — it keeps its name, its assets, its contracts, its employees, its bank accounts, and every liability it has ever incurred, known or not. Ownership of the corporate shell simply passes to a new parent.
In an asset deal (in UK practice a business and asset purchase), the buyer acquires named assets — plant, stock, intellectual property, goodwill, specific contracts — directly from the company, and assumes only the liabilities it expressly agrees to take. The selling company survives as an empty shell holding the cash proceeds, and the shareholders extract that cash separately. What transfers is a list, not an entity.
That single structural difference — buy the wrapper or buy the contents — drives every downstream consequence, and the two parties sit on opposite sides of almost all of them.
The Buyer Wants Assets for the Step-Up and the Liability Ring-Fence
A buyer has two reasons to prefer an asset deal, and the first is worth real money. Buying assets directly rebases their value in the tax accounts to the price paid — a step-up. Higher tax cost means higher capital allowances on qualifying plant and equipment and amortisation of acquired goodwill and intangibles, which reduces taxable profit and therefore cash tax for years afterward. In a share deal none of this happens: the company's assets keep their historic, usually much lower, tax base, and the premium the buyer paid earns no shield at all.
The second reason is risk. Because the buyer takes only the liabilities it names, it leaves behind the target's litigation, historic tax exposures, environmental claims, and any skeleton diligence failed to surface. The corporate history stays with the seller's shell. For a business with a messy past — or one where quality-of-earnings work raises more questions than it answers — that clean break is the whole point.
The Seller Wants Shares, and in the UK the Tax Code Agrees Emphatically
A seller prefers a share deal for a clean exit — sell the shares, receive the cash, walk away from the business and its liabilities in one step. In the UK the tax system turns that preference into a near-veto.
A corporate seller disposing of shares in a trading subsidiary can qualify for the Substantial Shareholding Exemption: hold at least 10% of the ordinary shares for a continuous 12 months in the six years before sale, and the gain is exempt from corporation tax entirely and automatically. Nothing remotely comparable exists for selling assets, where the gain is taxed at the 25% main corporation-tax rate. An individual seller pays a single capital gains charge, and on a share sale of a trading company can access Business Asset Disposal Relief — an 18% rate on the first £1m of qualifying lifetime gains from 6 April 2026, up from 14% the prior year and 10% before that — with the balance at 24%.
Then there is friction cost. Stamp duty on a share transfer is 0.5% of the consideration. An asset deal instead attracts Stamp Duty Land Tax on any UK property in the mix — up to 5% on non-residential land — and VAT unless the sale qualifies as a transfer of a going concern.
The Tax Asymmetry, Side by Side
Laid out in one place, the reason UK sellers hold the line becomes obvious. Every row that matters to the seller points the same way.
| Dimension | Share deal | Asset deal |
|---|---|---|
| What transfers | The whole company, all liabilities | Named assets, chosen liabilities |
| Buyer tax base | Unchanged (no step-up) | Stepped up to price paid |
| Corporate seller | Often exempt (SSE) | 25% CT on gain, plus tax to extract cash |
| Individual seller | CGT once; BADR 18% up to £1m | Tax in company, then again on distribution |
| Transfer tax | 0.5% stamp on shares | SDLT up to 5% on property; VAT unless TOGC |
| Employees | Stay with the company | Transfer automatically under TUPE |
| Contracts | Continue (subject to change-of-control) | Each needs assignment or novation |
The buyer wins one row — the tax base — and the seller wins the rest. In a negotiation between a willing buyer and a seller who can walk, the side with more rows and a credible alternative sets the structure.
Why Private Equity Almost Always Buys Shares
Sponsors are the clearest example of the share deal winning. A buyout is executed as a new acquisition vehicle — Bidco — purchasing the shares of the target's holding company, inside the Topco–Midco–Bidco structure that stacks equity and debt at the right levels. A sponsor does not chase an asset step-up, because it has a better tax shield available: the interest on the acquisition debt pushed into the structure, deductible against the target's own profits within the corporate interest restriction cap. Leverage, not a rebased balance sheet, is where the buyout's tax efficiency comes from.
The share deal's historic drawback — inheriting unknown liabilities — has also been largely neutralised. Warranty and indemnity insurance now transfers the risk of an undisclosed problem to an insurer, letting a buyer take the shares without pricing in the fear that pushed earlier generations toward assets. The one row the asset deal used to win on defence is now covered by a premium.
When It Flips Back to Assets
The default is not universal, and the exceptions are worth knowing because they are where an asset deal is the right answer rather than a concession.
Distress and insolvency. When a target is failing, a buyer purchases the trade and assets out of administration — frequently a pre-pack — taking the valuable operations and leaving the liabilities with the insolvent shell and its creditors. Buying the shares would mean buying the debt; nobody does that. Carve-outs. When the target is a division rather than a standalone company, there are no shares to buy until it is separated, so a corporate carve-out proceeds as an asset transfer of the relevant business. An untouchable history. Where diligence uncovers exposure a buyer will not insure or indemnify around, it may insist on assets to leave the problem behind, and pay the seller's tax cost to do so.
The Non-Tax Frictions That Also Favour Shares
Even setting tax aside, the asset deal is administratively heavier. Every material contract — customer agreements, leases, licences, supplier terms — must be individually assigned or novated, which means asking counterparties for consent and handing each of them a moment of leverage. In a share deal those contracts sit undisturbed inside the company, subject only to any change-of-control clause. Employees transfer automatically under TUPE in an asset deal, so the buyer cannot quietly leave people behind, and the associated consultation obligations add time. The share deal's speed and certainty are a genuine part of why it wins, not merely the tax.
The Verdict: The Buyer Argues Assets, the UK Seller Wins Shares
On first principles the buyer should want an asset deal — a step-up that shields future tax, and a wall between it and the target's past. On the facts of UK private M&A, it rarely gets one. The seller's tax position is too strong: an exemption or a single low-rate charge on shares against a double hit on assets, reinforced by lower transfer tax and a faster process. The buyer's step-up, real as it is, does not survive the price increase a rational seller demands to accept the worse structure.
So the market settles where the incentives point. The base case is a share deal, the sponsor recovers its tax efficiency through leverage rather than a rebased balance sheet, and the asset deal is reserved for distress, carve-outs, and the deals where a buyer will pay to leave the history behind. Knowing which situation you are in — and why — is the difference between reciting the two structures and understanding which one the room will actually use.
How It Is Tested in Interviews
The weak answer lists the mechanical differences and stops — buyer picks assets, seller sells the company. The strong answer names the tension and resolves it: the buyer wants the asset step-up, but the UK seller's tax position (SSE for a company, BADR for an individual, 0.5% stamp against SDLT and no double charge) is decisive, so the base case is a share deal. If pushed on private equity, explain that sponsors buy Topco shares and get their shield from debt interest, not a step-up. If pushed on when assets win, reach for distress, carve-outs, and unindemnifiable liabilities — and note that the US 338(h)(10) election removes the trade-off entirely, which is why the answer differs by jurisdiction.
Take Your Preparation Further
For how the price the parties argue over is actually struck, see Cash-Free, Debt-Free Explained, and for what happens to the balance sheet after a share deal completes, Purchase Price Allocation and Goodwill. For the wider sequence a deal runs through, see The M&A Process Explained, and for how sponsors stack the acquisition, The Topco–Midco–Bidco Structure.
Download the free M&A Process Cheat Sheet for the deal timeline end to end, and see the IB Interview Bible for model answers across M&A and deal structuring.
Ready for personalised feedback? Book a 1-on-1 mentoring session with an experienced IB/PE professional.
Frequently asked questions
What is the difference between an asset deal and a share deal?
In a share deal the buyer purchases the shares of the target company and takes it over whole — every asset, contract, employee, and liability, known or unknown, comes with it, because the company itself is unchanged and only its owner is new. In an asset deal (a business and asset purchase in the UK) the buyer instead acquires specific named assets directly from the company and assumes only the liabilities it expressly agrees to take, leaving the rest with the selling company's shell. The practical shorthand is that a share deal buys the wrapper and an asset deal buys the contents.
Why does a buyer usually prefer an asset deal?
Two reasons. First, an asset purchase steps up the tax base of the acquired assets to the price paid, which generates fresh capital allowances and amortisation and therefore shields future cash tax — a share deal leaves the company's historic, usually lower, tax base untouched, so the premium earns no shield. Second, because the buyer takes only the liabilities it names, it leaves the target's litigation, historic tax exposures, and any undiscovered problems behind with the seller's shell. In the UK the buyer often still ends up with a share deal, because the seller will not accept the worse tax outcome of selling assets without a price rise that erases the buyer's step-up benefit.
Why does a seller usually prefer a share deal in the UK?
Because UK tax makes a share sale dramatically cheaper for the seller. A corporate seller can qualify for the Substantial Shareholding Exemption — hold 10% of a trading subsidiary for 12 months and the gain is exempt from corporation tax automatically — while an asset sale is taxed at the 25% corporation-tax rate and then again when proceeds are extracted. An individual selling shares in a trading company pays a single capital gains charge and can use Business Asset Disposal Relief at 18% on the first £1m from April 2026. Stamp duty is also just 0.5% on shares, against SDLT of up to 5% on property in an asset deal, so almost every seller-favourable factor points to shares.
Do private equity firms buy assets or shares?
Almost always shares. A buyout is run through an acquisition vehicle, Bidco, that purchases the shares of the target's holding company inside the Topco–Midco–Bidco structure. Sponsors do not chase an asset step-up because they have a better shield available: the interest on the acquisition debt, deductible against the target's profits within the corporate interest restriction. Warranty and indemnity insurance covers the unknown-liability risk that historically pushed buyers toward assets, so the share deal keeps the tax and speed advantages without the old defensive drawback.
When is an asset deal actually used?
Mainly in three situations. In distress or insolvency, a buyer purchases the trade and assets out of administration — often a pre-pack — taking the valuable operations and leaving the liabilities with the insolvent shell, because buying the shares would mean buying the debt. In a carve-out, the target is a division rather than a standalone company, so there are no shares to buy until it is separated and the deal proceeds as an asset transfer. And where diligence uncovers exposure a buyer will not insure or indemnify around, it may insist on assets and pay the seller's extra tax to leave the problem behind. Note that in the US a Section 338(h)(10) election lets a legal share purchase be taxed as an asset purchase, removing the trade-off the UK buyer genuinely faces.