Capital Gains Tax on Business Sales — What UK Owners Need to Know

The tax treatment of a business sale is one of the most significant financial considerations in exit planning — and one that is often left too late. Decisions made in the years before a sale can have a profound effect on what you actually keep from the proceeds. Understanding the key concepts before you need them is essential.

Note: Tax legislation changes. This article reflects the position following the October 2024 Autumn Budget. Always take qualified tax advice specific to your situation before making any decisions.

Capital Gains Tax on Business Sales

When you sell your business — whether as a share sale or an asset sale — any gain above your base cost (broadly, what you originally paid or invested) is typically subject to Capital Gains Tax.

Following the 2024 Budget, the Capital Gains Tax rates applying to business disposals are:

• Basic rate taxpayers: 18% on business gains.
• Higher and additional rate taxpayers: 24% on business gains.

The rate applicable to business gains was increased in the 2024 Budget (from 10% and 20% respectively for most asset classes). However, Business Asset Disposal Relief (BADR) — formerly Entrepreneurs’ Relief — continues to provide a reduced rate in qualifying circumstances.

Business Asset Disposal Relief (BADR)

BADR reduces the effective CGT rate on qualifying business disposals to 10% on gains up to a lifetime limit of £1 million.

To qualify for BADR, the following conditions must generally be met for at least two years prior to the disposal:

• You must be an employee or officer of the company.
• You must hold at least 5% of the ordinary share capital and at least 5% of the voting rights.
• You must be entitled to at least 5% of the distributable profits and 5% of the assets on a winding-up.

For a business owner who has held shares for more than two years and meets the above conditions, BADR at 10% applies on the first £1 million of lifetime gains. Gains above £1 million are taxed at the standard rate (18% or 24% depending on your overall income for the year).

On a sale generating, for example, a £2 million gain, BADR could reduce your total CGT bill by approximately £80,000 compared to the standard rate (assuming higher-rate taxpayer status). On larger gains, the differential is proportionally smaller as a percentage but no less real in absolute terms.

The Employee Ownership Trust Exemption

The most significant CGT opportunity available to UK business owners is the EOT exemption. Sales of shares to qualifying Employee Ownership Trusts are currently free from Capital Gains Tax with no upper limit on the exemption.

For owners with gains significantly above the £1 million BADR limit, this exemption makes the EOT route substantially more tax-efficient than a trade sale in net terms, even if the gross sale price is lower. At a 24% CGT rate on gains above £1 million, the tax saving on a £3 million gain above BADR threshold is £720,000. That is a large number to leave on the table without careful consideration.

The 2024 Budget made some changes to the EOT rules, including requirements around the seller’s ongoing involvement, the composition of the trustee board, and anti-avoidance provisions. These changes are important to understand before proceeding — but they do not fundamentally undermine the EOT’s tax advantages for genuine employee ownership transitions.

Share Sale vs Asset Sale

Business sales can be structured either as a share sale (the buyer acquires the shares in your company) or as an asset sale (the buyer acquires the business assets — goodwill, customer contracts, equipment, intellectual property — from the company). The tax implications differ significantly.

In a share sale, you personally sell the shares you hold. Any capital gain accrues to you personally and is subject to CGT (potentially with BADR relief). The transaction is relatively clean — the buyer acquires the company with all its assets, liabilities, and history.

In an asset sale, the company sells its assets. Any gain on the assets is taxed at the corporate level, and extracting the proceeds as cash typically involves additional tax. Asset sales are often favoured by buyers (who acquire a cleaner set of assets without inheriting historic liabilities) but are generally less tax-efficient for sellers.

Most acquisitions of profitable UK SMEs are structured as share sales, partly because of seller tax preference and partly because it is the simpler structure for going-concern businesses.

Structuring for Tax Efficiency: Key Considerations

Timing of the sale

The tax year in which a disposal occurs affects the rate of CGT payable — and in some circumstances, spreading proceeds across two tax years can be advantageous. This requires careful planning in advance.

Earn-outs

Where part of the consideration is deferred — payable based on future performance rather than on completion — the tax treatment of the earn-out can be complex. In some cases, the full CGT liability may arise on completion even if payment of part of the consideration is deferred. Seek advice early on earn-out structures.

Growth shares and management incentives

If you have granted EMI options or other equity to members of your management team, the tax treatment of those instruments on a sale needs to be considered carefully — both for the employees and for the implications on deal structure.

Business Investment Relief and reinvestment

Some reliefs allow CGT to be deferred or reduced on reinvestment of business sale proceeds into qualifying investments. These are worth exploring with your tax adviser as part of post-exit financial planning.

The Most Important Point

Tax planning for a business exit is not a last-minute exercise. Many of the most effective tax strategies — BADR qualification, EOT structuring, management incentive arrangements, share structure — require decisions and actions to be taken months or years before the sale. Starting exit planning early gives you the time to structure your affairs tax-efficiently.

This article is an overview, not advice. Always take qualified tax and legal advice specific to your circumstances before making decisions that affect your tax position.

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