Business Relief (often called Business Property Relief, or BPR) can cut the value of a qualifying business or its assets for Inheritance Tax by either 100% or 50%. A trading business, an interest in one, or unquoted company shares can qualify for full relief, while certain assets used by a business attract half relief. Two years of ownership is normally required. A significant reform takes effect from 6 April 2026, so it pays to understand where you stand now.

Business Relief is one of the most valuable tools in Inheritance Tax planning for business owners. Used correctly, it can pass a family firm to the next generation with little or no Inheritance Tax to pay. Used carelessly, or misunderstood, it can leave an estate facing a bill nobody planned for. This guide explains how the relief works, what qualifies, and how the rules change from April 2026.

What is Business Relief and how much can it save?

Business Relief reduces the value of relevant business property when Inheritance Tax is calculated, usually on death but sometimes on lifetime gifts into trust. The relief comes in two rates. At 100%, the qualifying value is taken out of the Inheritance Tax calculation entirely. At 50%, half the value is removed. Because the standard Inheritance Tax rate is 40% above the nil rate band, full relief on a valuable trading business can save hundreds of thousands of pounds. The relief applies automatically where the conditions are met, but the executors must claim it and be ready to evidence it.

What qualifies for 100% relief?

The following normally qualify for 100% Business Relief:

  • A business, or an interest in a business, that trades rather than invests. This includes a sole trader operation or a share in a partnership.
  • Shares in an unlisted (unquoted) company, whatever the size of the holding.

The key word is trading. A wholesale, manufacturing, retail, professional services or similar operating business is the classic case. The relief attaches to the business as a going concern, which includes the goodwill and working assets that sit inside it. If you run your company through a limited company structure, the shares themselves are the relievable asset, which is one reason the choice between operating as a sole trader or a limited company matters for succession as well as tax.

What gets 50% relief instead?

Some assets attract only half relief. The main examples are:

  • Property, premises, buildings or machinery owned personally by the deceased but used in a business they were a partner in or controlled.
  • A controlling shareholding in a listed (quoted) company, meaning holdings that give more than 50% of the voting rights.
  • Business assets held in a trust that the deceased had the right to benefit from.

A common situation is the director who owns the trading premises personally and lets the company use them. The premises can attract 50% relief, while the company shares attract 100%. Getting the ownership structure right, well before it matters, can make a large difference to the final figure.

How long must you own the asset?

You must normally have owned the business or asset for at least two years immediately before death for relief to apply. There are limited exceptions, for example where an asset replaced another qualifying asset, or where it was inherited from a spouse or civil partner who had themselves owned it. The two year clock is one of the most overlooked conditions. A business acquired shortly before death, or shares issued very recently, may fail the test even though everything else looks in order.

Which businesses are excluded?

Relief is denied where a business consists wholly or mainly of dealing in securities, stocks or shares, holding investments, or holding and letting property. In practice this is where most Business Relief disputes arise. HMRC looks at what the business actually does, not what it is called. A furnished holiday letting operation, a property portfolio, or a company sitting on large cash reserves can all be challenged as “wholly or mainly investment”, which pushes the relief to nil. Mixed businesses are judged in the round, so the balance of activity, assets, income and management time all count. This is precisely the sort of judgement HMRC likes to test, which is where good record keeping and professional support earn their place.

What is changing from 6 April 2026?

This is the most important change to Business Relief in a generation. From 6 April 2026:

  • A new combined allowance of £2.5 million applies to the value of property qualifying for 100% Business Relief or 100% Agricultural Relief, or both. Qualifying value up to £2.5 million keeps full 100% relief.
  • Value above the £2.5 million allowance receives 50% relief rather than 100%. In effect this means an effective Inheritance Tax rate of 20% on the excess. The allowance was first announced at £1 million in the Autumn Budget 2024; on 23 December 2025 the government raised it to £2.5 million before it took effect. Any unused part of the allowance can be transferred to a surviving spouse or civil partner, so a couple can pass on up to £5 million of qualifying business or agricultural property with full relief, on top of their other Inheritance Tax allowances.
  • Shares that are unlisted but traded on markets not meeting HMRC’s definition of “listed”, such as AIM, move to 50% relief in all circumstances, and these do not benefit from the £2.5 million allowance.
  • Inheritance Tax on qualifying business and agricultural property can be paid in equal annual instalments over ten years, interest free.

For estates with substantial trading businesses, this reform can create a real Inheritance Tax charge where none existed before. It makes early planning, accurate valuations and clean records more important than ever. Business owners should also keep an eye on the interaction with Business Asset Disposal Relief and Corporation Tax when weighing up whether to gift, sell or retain a business.

Where can I read more?

Business Relief sits within a wider set of business tax rules. Our accountancy and tax guide covers the reliefs and returns that owner managed businesses meet most often. If a claim is likely to matter to your estate, take advice while options are still open.

Business valuations and Business Relief claims are exactly the kind of judgement HMRC scrutinises, and defending a “wholly or mainly investment” challenge or a disputed valuation can mean months of correspondence and significant professional fees. A Solar Protect tax investigation insurance policy covers up to £100,000 of your accountant’s fees with no excess, so your adviser can respond in full without the cost falling on you. Get a quote to protect your business and your estate.

Reviewed by Matthew Bartlett, Director, Solar Protect. Last reviewed 6 October 2026. This guide is general information, not personalised tax or financial advice. Figures are correct for the 2025/26 and 2026/27 UK tax years at the time of writing.