Share sale vs asset sale — what's the difference for founders?
By SuLe · Updated 3 June 2026
In a share sale the buyer acquires the whole company — assets, contracts and liabilities together — and the shareholders sell their shares for capital gains treatment. In an asset sale the buyer cherry-picks specific assets, leaves liabilities behind, and TUPE automatically transfers employees. Founders almost always prefer a share sale.
Key facts
- Share sale: the buyer takes the company whole, liabilities included; sellers get capital gains tax treatment.
- Asset sale: the buyer selects assets and leaves liabilities; the company, not the shareholders, is the seller.
- TUPE is irrelevant to a share sale (the employer is unchanged) but automatically transfers staff in an asset sale.
- Asset sales risk double tax — the company taxed on gains, then shareholders taxed extracting the proceeds.
- Founders almost always prefer selling shares; buyers sometimes prefer assets to avoid inheriting liabilities.
What is the core difference?
The two deals sell different things. In a share sale, the shareholders sell their shares, so the buyer ends up owning the company exactly as it is — every asset, contract, employee and liability comes along.
In an asset sale, the company itself sells chosen assets — the IP, the customer contracts, the equipment — and keeps its liabilities. The buyer picks what it wants; the old company (and its shareholders) keeps the rest.
That single distinction — selling the company versus selling its assets — drives the tax, the employees and the risk allocation that follow.
Why do founders prefer a share sale?
Two reasons: cleaner tax and a clean exit. When shareholders sell shares, they get capital gains tax treatment on their gain, potentially with Business Asset Disposal Relief, and they walk away from the company entirely.
An asset sale keeps the company alive holding cash and liabilities, which then has to be extracted and wound down — often triggering a second layer of tax. The buyer also leaves the founders holding whatever liabilities were not transferred.
So for sellers, the share sale hands over the whole problem and produces a single, capital-taxed payout. That is why it is the founder default. [More: What is a founder secondary and when can I sell some of my shares?]
Why might a buyer want an asset sale?
Risk. A buyer purchasing shares inherits everything, including hidden debts, litigation or tax exposures it may not have found in diligence. Buying assets lets it leave those risks with the old company.
Cherry-picking is the other draw: the buyer takes the profitable product line or the IP and ignores loss-making contracts or unwanted staff. That flexibility is valuable to a cautious buyer.
The trade-off is more consents and transfers — each contract, licence and asset may need assigning individually — which makes asset deals more administratively fiddly than a single sale of shares.
How does TUPE affect an asset sale?
TUPE — the Transfer of Undertakings (Protection of Employment) Regulations — automatically moves employees to the buyer when a business or part of it is sold as assets, carrying their existing terms and continuity of employment with them.
In a share sale, TUPE simply does not apply: the employer is the company, and the company has not changed hands — only its owners have. Staff stay on exactly as before.
For an asset sale, TUPE means the buyer cannot quietly leave employees behind, and dismissals connected to the transfer are heavily restricted. This is a major planning point in any asset deal.
| Share sale | Asset sale | |
|---|---|---|
| What is sold | The shares (whole company) | Selected assets |
| Liabilities | Pass to the buyer | Stay with the old company |
| Seller | The shareholders | The company |
| Seller tax | Capital gains for shareholders | Company taxed on gains, then extraction |
| Double-tax risk | Generally no | Yes |
| Employees | Stay — TUPE not engaged | Transfer automatically under TUPE |
| Consents | Fewer — one sale | More — each asset/contract |
What documents run the deal?
A share sale runs on a share purchase agreement (SPA): price and structure (completion accounts or locked box), warranties and indemnities from the sellers, a disclosure letter, restrictive covenants on the founders, and completion mechanics. Warranty caps, baskets and time limits are heavily negotiated.
An asset sale uses a business or asset purchase agreement plus a raft of transfer documents — IP assignments, contract novations, property transfers — reflecting the piece-by-piece nature of the deal.
Either way, warranties allocate risk between buyer and seller, and the disclosure exercise is where sellers protect themselves. [More: What is a share purchase agreement (SPA)?]
Worked example
Sam and Aisha built a developer-tools company and receive a £4m offer. The buyer initially proposes an asset sale: it wants the core product IP and the engineering team but not an unresolved supplier dispute.
Under that structure, their company would sell the assets, be taxed on the gain, and then Sam and Aisha would face tax again extracting the cash and winding the company down — two layers on one deal. The engineers would transfer under TUPE on their existing terms.
Their solicitor pushes for a share sale instead: the buyer takes the whole company, the founders get capital gains treatment on a single payout, and the supplier dispute is handled through warranties and an indemnity rather than left stranded. The buyer agrees, with a price adjustment for the risk.
Where founders go wrong
Accepting an asset sale without modelling the tax
— the double-tax hit can shrink your net proceeds well below a share-sale equivalent.Forgetting TUPE in an asset deal
— staff transfer automatically with protected terms; transfer-related dismissals are tightly restricted.Underestimating asset-sale admin
— each contract and licence may need individual consent or novation, delaying completion.Treating warranties as boilerplate
— caps, baskets and time limits decide your real exposure after the deal closes.
Related questions
Which is better for founders — share sale or asset sale?
Founders almost always prefer a share sale. The buyer takes the whole company including liabilities, sellers get capital gains treatment on the proceeds, and there is usually no double tax. An asset sale leaves liabilities and risks the company being taxed on gains before you extract the cash.
What is the double-tax problem in an asset sale?
The company is taxed on any gain when it sells its assets, and then shareholders are taxed again when they extract the remaining cash. Two layers of tax on one deal is why founders resist asset sales unless the buyer insists.
Does TUPE apply to a share sale?
No. In a share sale the employer — the company — does not change, so employees simply stay put and TUPE is not engaged. TUPE bites on an asset sale, automatically transferring employees to the buyer on their existing terms.
Why would a buyer want an asset sale?
To cherry-pick the assets they want and leave the liabilities behind. Buyers worried about hidden debts, litigation or unknown liabilities often prefer buying assets so those risks stay with the old company rather than following the deal.
What tax treatment do sellers get on a share sale?
Selling shares is a capital gains tax disposal for the shareholders, and Business Asset Disposal Relief may reduce the rate if you qualify. Rates have changed recently, so check the current rate before you rely on any net figure.
Whether you sell shares or assets reshapes your tax bill, your employees' position and what liabilities you keep — and buyers push for the structure that suits them, not you. A SuLe solicitor can model both routes and negotiate the SPA or asset agreement so the deal works for the sellers. Book a free consultation with a startup solicitor before you agree the structure.
Keep reading: What is a share purchase agreement (SPA)? · What is a founder secondary and when can I sell some of my shares? · What is an earn-out in an acquisition? · What legal prep does a startup need before an exit? · What happens to employee options when a startup is acquired? · How do liquidation preferences play out in an exit waterfall?
Primary sources: Companies Act 2006
