Asset sale vs share sale: the difference that shapes every UK exit
Whether a buyer purchases your company's shares or just its assets changes who is liable for what, how much tax you pay, and how complicated completion becomes.
Why this distinction matters before it matters
Most founders assume an acquisition is an acquisition. In practice, almost every UK trade sale is structured as either a share sale or an asset sale, and the choice affects tax, liability, employees, contracts and how much negotiating pain happens before completion. Buyers and sellers often want different structures for different reasons, so understanding both sides helps founders spot where the real negotiation is happening, which is rarely just the headline price.
Share sale: the buyer takes the whole company
In a share sale, the buyer purchases the shares in your limited company directly from the shareholders. The company itself does not change. It keeps its name, its contracts, its employees, its bank accounts, its trading history and, critically, its liabilities. The buyer effectively steps into the shoes of the previous owners.
For founders and other shareholders this is usually the preferred route. You are selling something you own personally (shares), so the proceeds go straight to you, and in the UK this is typically treated as a capital gain rather than income. Reliefs exist for qualifying business disposals that can reduce the tax due, but the availability and rate of any relief depends on rules that change, so this is always one to check with HMRC’s current guidance or an accountant rather than assume from a previous deal.
Because the company continues exactly as it was, contracts with customers, suppliers and landlords generally do not need to be renegotiated or reassigned, unless those contracts contain change-of-control clauses that require consent or notice. Employees also transfer automatically since they remain employed by the same legal entity; there is no need to invoke TUPE because nothing about their employer has changed.
The trade-off is risk. Because the buyer is acquiring the whole legal entity, they inherit everything sitting inside it: historic tax liabilities, undisclosed contractual disputes, pension obligations, warranty claims from old customers, anything. This is exactly why due diligence on a share sale tends to be extensive, and why warranties, indemnities and sometimes escrow or retention arrangements feature heavily in the sale and purchase agreement. Buyers are effectively asking sellers to stand behind the company’s past.
Asset sale: the buyer picks what it wants
In an asset sale, the buyer does not purchase the company at all. Instead, the company itself sells specific assets, such as intellectual property, equipment, customer contracts, goodwill, stock or a particular product line, to the buyer. The company, as a legal entity with its own shareholders, keeps existing after the sale, now holding cash (or other consideration) instead of the assets it sold, plus whatever liabilities were not transferred.
This structure is attractive to buyers because it lets them cherry-pick what they want and leave behind what they do not, such as old litigation, pension deficits or unwanted contracts. It also generally means less exposure to unknown historic liabilities, since those stay with the original company rather than passing to the buyer.
For sellers, an asset sale is usually messier. Individual contracts often need to be formally assigned or novated, which can require third-party consent from customers, landlords or lenders, adding time and negotiation to the process. Employees connected to the transferred business typically do transfer under TUPE (Transfer of Undertakings, Protection of Employment), which brings its own consultation and notification obligations that need careful handling.
Tax treatment also differs. Because it is the company selling the assets, not the shareholders selling shares, any gain is usually taxed at the corporate level first. If the shareholders then want to extract the resulting cash from the company, for example via dividend or liquidation, that can trigger a second layer of tax. This double-taxation risk is one of the main reasons founders often push for a share sale where they have the choice, and it is worth modelling both scenarios with a tax adviser before agreeing heads of terms.
Why buyers and sellers often want different things
Buyers frequently prefer asset sales because they limit inherited risk and let them leave unwanted liabilities behind. Sellers frequently prefer share sales because of cleaner tax treatment and a simpler, faster path to walking away with cash. In practice the eventual structure is a negotiation, and it can be influenced by the buyer’s own corporate structure, the presence of valuable contracts that are hard to assign, or specific liabilities that the buyer is unwilling to take on under any circumstances.
What founders should actually do
Decide early, ideally before serious negotiations start, which structure a prospective buyer is proposing, since it changes what due diligence looks like, what warranties you might be asked to give, and what your net proceeds could actually be after tax. Get a tax adviser involved before agreeing heads of terms rather than after, because restructuring a deal late in the process to fix an unfavourable tax outcome is difficult and sometimes impossible. And check current guidance on capital gains, business asset reliefs and corporation tax rates directly with HMRC, since these figures and thresholds change and should never be assumed from memory or an old deal.
Where to check the details
HMRC’s guidance on capital gains and business disposals sets out current tax treatment. The UK government’s business guidance on selling a business is a useful starting point, and MoneyHelper offers general guidance for anyone navigating a significant personal financial event like a business sale.