The tax reliefs that matter on a practice sale are the ones with a two-year qualifying clock — which means the decisive work happens years before completion, or it does not happen at all. By the time a buyer is in diligence, the structural choices that set your tax bill have already been made. This is the part of selling that rewards reading early and punishes reading late.

The relief that does the work

Business Asset Disposal Relief — the successor to Entrepreneurs’ Relief — reduces the rate of Capital Gains Tax on qualifying disposals. It has been steadily withdrawn in value, and the direction is one way:

Set that against the main rates for assets other than residential property in 2026-27: 18% on gains falling within the basic income tax band, and 24% above it, with higher-rate taxpayers paying 24% on all gains. The annual exempt amount is £3,000.

The comparison is the point. BADR was once a 10% rate against a 20% alternative — a halving. At 18% against 24% it is now a six-point saving for a higher-rate taxpayer, still worth having on a large gain, but no longer the dominant consideration it was. Anyone whose sale planning was built around the old arithmetic should look at it again.

The relief is capped at a £1 million lifetime limit of qualifying gains, not £1 million per disposal. Spouses and civil partners each have their own limit, which is why ownership structure between them is a question worth asking early rather than at completion.

The two-year clock is the whole story

To qualify on the sale of all or part of a business, two things must have been true for at least two years up to the date of sale: you were a sole trader or a business partner, and you had owned the business for at least two years.

Where you are selling shares in a company, the conditions are tighter and equally retrospective. For at least two years the company must have been your “personal company” — meaning you held at least 5% of both the shares and the voting rights — you must have been an employee or office holder, and the company’s main activities must have been trading rather than investment.

Every one of these conditions is measured backwards from the sale. Nothing you do in the final months of a transaction can create a qualifying period that was not already there.

That is why restructuring shortly before a sale is a hazard rather than a fix. Incorporating, changing shareholdings, bringing in a spouse, altering voting rights — each of those can reset or fail a two-year test that was otherwise about to be satisfied. The time to take advice about structure is when a sale is a plan, not when it is a process.

Asset sale or share sale changes the answer

The legal route your practice must take — set largely by whether you hold an NHS contract and whether you are incorporated, as our guide to how to sell a dental practice sets out — also determines the shape of the tax question.

On an asset sale, the business sells its assets. Where the practice is unincorporated, the gain arises to the individual owners. Where it is a company selling its own assets, the proceeds land inside the company, and getting them out to the shareholder is a second, separate taxable step — a point that surprises principals who think of the company’s money as their money.

On a share sale, the shareholder sells shares and the gain arises to them directly, which is the cleaner route to a personal gain and the reason share sales are usually preferred by sellers of incorporated practices. Buyers frequently prefer the opposite, because assets come without the company’s history. That tension is one of the real negotiations in a practice sale, and it is a tax negotiation as much as a legal one.

What this means for your practice

Three practical consequences, none of which require a tax adviser to notice:

• Read about tax at the “thinking about it” stage. Two years is the qualifying period on the relief that matters. If a sale is three years away, you have time to fix a structure; if it is three months away, you have a rate, not a choice.
• Know which side of 6 April a completion falls on. The BADR rate has stepped up on 6 April in two consecutive years. A completion date is a negotiable term, and where a rate change straddles it, that term has a value.
• Do not restructure to solve a sale problem without checking the tax clock. The changes most often proposed late — incorporating, adjusting shareholdings, adding a family member — are precisely the ones that interact with two-year tests.

Two things this page deliberately does not cover, because they were not verifiable to a primary source here and a half-answer would be worse than none: the VAT treatment of a practice sale, and the reliefs around incorporation and holdover. Both are real, both can matter, and both belong to your accountant rather than to an explainer.

For how the sale itself is structured, see how to sell a dental practice; for what the business is worth in the first place, how a dental practice is valued; and for the wider picture, our guide to buying and selling a UK dental practice. The ongoing VAT position of a trading practice — which is a different question from the tax on selling it — is covered in VAT on dental treatment.

This is an explanation of structure and published rates. It is not tax advice, and a practice sale is exactly the kind of transaction where the specifics — your ownership history, your entity, your other gains — change the answer materially. Take the structure here and take the facts to your accountant.