Asset Purchase vs Share Purchase: UK Tax Implications in 2026

The Fundamental Tension

When a business changes hands in the UK, the transaction can be structured either as a share purchase (where the buyer acquires the shares of the target company) or an asset purchase (where the buyer acquires specific underlying assets of the business). The structure has profound tax consequences for both parties -- and the two sides of the negotiating table will almost always want different things.

Understanding why each party has their preferred structure, and where the negotiation levers are, is essential for anyone involved in buying or selling a UK business.

The Seller's Perspective

Share Sale: The Preferred Route

From a seller's perspective, selling shares is almost always preferable. Here is why:

Single capital event. The seller disposes of their shares and receives proceeds directly. There is no corporation tax event inside the company, and no question of how to extract the proceeds afterwards.

Capital gains tax rates. Gains on share disposals are taxed at CGT rates -- 10% (basic rate) or 20% (higher/additional rate) for 2026/27. Compare this to dividend income tax rates of up to 39.35% or employment income up to 45%.

Business Asset Disposal Relief. If the seller qualifies for BADR, the entire gain is taxed at just 18% up to the GBP1 million lifetime limit. For a seller extracting GBP500,000 of value, BADR can reduce the effective tax rate dramatically compared to any alternative.

Cleanness. Once the shares are sold, the seller is largely done. The buyer takes on all assets and liabilities of the company.

Asset Sale: Less Attractive for Sellers

In an asset sale, the company sells its underlying assets -- goodwill, plant, equipment, stock, contracts. This creates a tax event inside the company (corporation tax on the gain), and then the seller must extract the proceeds from the company, creating a second tax event (dividend income tax or further CGT on a later liquidation).

Example of double taxation:

• Company sells goodwill for GBP400,000, purchased at nil (self-generated). Corporation tax at 25% on GBP400,000 = GBP100,000.
• Remaining GBP300,000 distributed as dividend to higher-rate shareholder: GBP300,000 x 33.75% = GBP101,250.
• Total tax: GBP201,250 on GBP400,000 of value -- an effective rate of over 50%.

Compare this to a share sale with BADR: GBP400,000 x 18% = GBP72,000. The difference is stark.

The Buyer's Perspective

Asset Purchase: The Preferred Route

Buyers strongly prefer asset purchases for several reasons:

Cherry-picking assets. The buyer can acquire only the assets they want -- goodwill, customer lists, certain equipment -- and leave behind unwanted liabilities such as employment disputes, tax investigations, or environmental obligations.

Step-up in base cost. In an asset purchase, the buyer's base cost for each acquired asset is the price paid. This means future disposals of those assets start from the current market value, reducing future CGT exposure. In a share purchase, the original historic base costs carry over inside the company.

Capital allowances on plant and equipment. When plant and machinery are acquired in an asset deal, the buyer can claim capital allowances (including the Annual Investment Allowance up to GBP1 million per year) on the full purchase price allocated to those assets.

Goodwill amortisation. Fixed-rate amortisation of purchased goodwill at 4% per year is available for tax purposes under intangible fixed assets rules -- though subject to important restrictions on related party transactions (see below).

No inherited liabilities. The buyer does not acquire the target company's corporation tax history, pending litigation, or regulatory liabilities. In a share deal, these come with the package.

Share Purchase: Buyer's Concerns

Buyers accepting a share deal typically require:

• Extensive warranties and indemnities from the seller covering known and unknown liabilities
• A retention (escrow amount held back from proceeds) to cover warranty claims
• Tax due diligence covering at least six years of corporation tax history
• Representations on employment matters, ongoing litigation, and regulatory compliance

The cost of this due diligence and the risk of inheriting unexpected liabilities make share purchases more expensive and complex for buyers to manage.

Stamp Duty and SDLT

One area where the structures diverge significantly is transfer taxes.

Share Purchase

A share purchase attracts Stamp Duty at 0.5% of the consideration. This is a modest charge. On a GBP1 million share purchase, Stamp Duty is GBP5,000.

Asset Purchase Including Property

If the acquired assets include UK land or property, the buyer pays Stamp Duty Land Tax (SDLT) on the property element at full commercial rates:

• 0% on the first GBP150,000
• 2% on GBP150,001 to GBP250,000
• 5% on amounts above GBP250,000

Where a business has significant property (a retail chain, a care home group, a property developer), the SDLT cost of an asset deal can run to hundreds of thousands of pounds. This is one scenario where even buyers may prefer a share deal.

For mixed-use or commercial transactions, SDLT does not include the 3% surcharge that applies to residential purchases.

Goodwill Amortisation in Asset Deals

When a buyer acquires a business's goodwill as part of an asset purchase, they may be able to claim a corporation tax deduction for the amortisation of that goodwill over its useful economic life -- or at the statutory 4% per annum fixed rate under the intangible fixed assets (IFA) regime.

Example: Buyer acquires goodwill for GBP500,000. At 4% per annum, they claim GBP20,000 per year as a deduction against corporation tax profits. Over 25 years, the full cost is written off.

At 25% corporation tax (above the GBP250,000 profit threshold), this deduction saves GBP5,000 per year in tax.

The Related Party Restriction

The ability to amortise purchased goodwill for tax purposes is significantly restricted where the acquisition is from a related party. Under ICTA 2009 and subsequent amendments, goodwill acquired from a related individual (including the seller who retains a connection to the business) does not qualify for the intangible fixed assets regime for tax purposes. The amortisation charge is disallowed.

This restriction was introduced to prevent the common pre-2015 planning arrangement of incorporating a business and immediately selling the goodwill to the company, claiming deductions inside the company while the individual paid CGT on the gain.

HMRC defines related parties broadly. Where a shareholder sells a business to their own company, or sells a business and then becomes an employee or director of the purchasing company, the restriction is likely to apply.

Buyers should factor this into negotiations. If the related party restriction applies, the tax amortisation benefit disappears, reducing the value of an asset deal to the buyer.

Bridging the Buyer-Seller Gap

Because sellers want share deals and buyers want asset deals, there is always a negotiation gap. This is typically bridged by:

Price adjustment. The buyer pays a higher price in a share deal to compensate for the lack of step-up in asset costs and the assumption of historic liabilities. The seller accepts a lower price in an asset deal to reflect their worse tax position.

Retention of proceeds. In a share deal, buyers often retain a portion of the purchase price for twelve to twenty-four months to cover warranty claims. This is less necessary in an asset deal.

Earn-outs. Where the business value depends on future performance, earn-out arrangements allow the purchase price to vary. These have their own complex tax treatment -- CGT timing rules mean that earn-out receipts can fall into later tax years, which may be beneficial or harmful depending on circumstances.

Corporation Tax on Asset Disposals

When a company sells assets as part of an asset deal, it pays corporation tax on any gains at the prevailing rates:

• 19% on profits up to GBP50,000
• 25% on profits above GBP250,000
• Marginal relief between GBP50,000 and GBP250,000 (effective rate up to approximately 26.5%)

If the company has accumulated trading losses, these can offset the gains and reduce or eliminate the corporation tax charge -- one reason sellers may prefer an asset deal if significant brought-forward losses exist.

Plant and machinery sold above their written-down value (tax base cost) triggers a balancing charge -- the excess is added to profits and taxed as income.

Practical Checklist for Buyers

Before agreeing to a share versus asset deal, buyers should:

• Conduct thorough tax due diligence covering corporation tax, VAT, PAYE, and R&D claims
• Obtain detailed tax warranties covering at least six years
• Consider whether the target company has unresolved HMRC enquiries
• Assess employment liabilities under TUPE (Transfer of Undertakings)
• Calculate the SDLT cost if property is included
• Determine whether goodwill amortisation will be available or restricted

Practical Checklist for Sellers

Sellers should:

• Confirm BADR eligibility at least two years before any planned sale
• Consider restructuring share classes to ensure all shareholders qualify
• Review any potential anti-avoidance concerns (particularly Transactions in Securities rules)
• Take advice on whether an MVL post-asset-sale could improve the extraction of proceeds
• Consider the interaction with any earn-out arrangements

Conclusion

The asset versus share purchase debate sits at the heart of almost every UK business sale. Sellers want shares; buyers want assets. The gap between their preferences is filled by price adjustments, warranties, retentions, and commercial negotiation.

For sellers, a share sale with BADR at 18% is almost always the gold standard. For buyers, asset purchases offer cleaner balance sheets, capital allowances, and -- where the related party restriction does not apply -- goodwill amortisation. Understanding both perspectives allows both sides to negotiate from a position of knowledge.

Professional advice from a tax adviser experienced in M&A transactions is essential before committing to either structure.