Stock Sale 20% Tax vs Asset Sale 40-45% Tax | Seller Relief Eligibility | Buyer Negotiation Dynamics | 2026 Guide The choice between stock sale (selling company shares) and asset sale (selling individual business assets) has dramatic tax implications for sellers, often determining 15-25% of net proceeds. Stock sales in the UK typically attract 20% capital gains tax plus potential Entrepreneurs' Relief (now Growth Relief) reducing effective tax to 10-20% on eligible gains. Ass