Business Property Relief UK (2026): The £2.5m Cap, Who Qualifies & What's Changed

What Business Property Relief does

BPR allows business assets to pass on death (or by lifetime gift) with reduced or eliminated IHT — preventing family businesses from being broken up to pay a 40% tax bill. Without BPR, the death of a business owner could force an immediate sale of the business to fund the IHT liability.

The relief has been available since 1976 and, until April 2026, offered 100% IHT relief on all qualifying business assets regardless of value. The October 2024 Autumn Budget introduced a £2.5m combined cap (shared with Agricultural Property Relief) that took effect from 6 April 2026 — one of the most significant changes to IHT reliefs in decades.

How the April 2026 cap works: old vs new rules

Couples: The £2.5m allowance is per person, so a couple can pass up to £5m of qualifying business/agricultural assets at 100% relief, plus the standard nil-rate bands (£325,000 each) and RNRB (£175,000 each where applicable).

What qualifies for BPR — and what doesn't

The "wholly or mainly trading" test is applied to the business as a whole. A company that earns more than 50% of its revenue, assets, or staff time from investment activities rather than trading may lose BPR eligibility entirely — a critical issue for businesses that have accumulated significant cash reserves or non-trading assets.

The two-year ownership requirement

You must have owned the qualifying business property for at least two years immediately before the transfer — whether on death or as a lifetime gift. Key points:

• The two-year clock resets if you dispose of qualifying property and replace it with different qualifying property (unless the replacement qualifies under specific rules)
• A business that has been put on the market for sale loses BPR — even if the sale has not completed at the date of death
• A surviving spouse can "tack" the deceased's period of ownership onto their own when calculating the two years
• Newly acquired qualifying assets acquired within two years of death do not qualify — plan business restructuring timing carefully

AIM shares and the 2026 IHT change

Before April 2026, AIM-listed shares were one of the most widely used IHT planning tools: hold qualifying AIM shares for two years and they were 100% IHT-free, giving wealthy investors an alternative to life insurance or complex trust structures.

From April 2026, AIM shares are treated like other BPR assets — subject to the same £2.5m combined cap. An investor with £1m in AIM shares and a £2m qualifying business has only £500,000 of capacity left within the cap before the 50% relief tier applies.

Many AIM IHT portfolios were constructed on the assumption of unlimited 100% relief. Investors with large AIM holdings should review whether to: rebalance the portfolio; use the annual gift exemptions to reduce exposure; or consider alternative IHT planning alongside AIM investment.

Paying IHT on business assets in instalments

Where IHT is due on qualifying business assets above the £2.5m cap, executors can elect to pay the IHT in 10 equal annual instalments — now interest-free for assets within the cap tier and interest-charged for the 50% relief tier (from April 2026 reforms). This gives the family time to fund the tax from business income rather than forcing an immediate asset sale.

Instalment payment must be elected when submitting the IHT return. If the qualifying assets are sold before all instalments are paid, the remaining balance becomes due immediately.

Frequently asked questions

What is Business Property Relief (BPR)?

Business Property Relief (BPR) is an inheritance tax relief that reduces or eliminates IHT on qualifying business assets passed on death or given away during a lifetime. It was introduced in 1976 to prevent family businesses from being broken up to pay IHT on the owner's death. Until April 2026, qualifying assets received 100% relief (effectively zero IHT). From April 2026, a £2.5m combined cap applies — up to £2.5m qualifies for 100% relief; above that, only 50% relief is available (producing an effective 20% IHT rate on the excess).

What assets qualify for Business Property Relief?

Qualifying assets for BPR include: a sole trader business or share of a partnership; shares in an unquoted company (including AIM-listed shares, though AIM shares now only qualify for 50% relief); shares giving more than 25% control of a quoted company; certain assets used in a qualifying business (e.g., machinery or land used by a company or partnership in which you hold a controlling interest). Non-qualifying assets include: investment businesses (purely holding shares, property, or cash); excepted assets (cash or investments held by a trading company beyond its business needs); and property let to third parties in most circumstances.

What is the two-year ownership rule for BPR?

To qualify for BPR, you must have owned the qualifying business property for at least two years immediately before the transfer (either on death or as a lifetime gift). The two-year clock resets if you acquire new qualifying property, except in specific replacement property situations. A business that is put on the market for sale loses its BPR eligibility — so timing a sale around death is important to consider. Inherited qualifying property from a spouse can 'tack' the deceased's period of ownership onto the survivor's.

How does the April 2026 BPR cap affect estate planning?

From April 2026, the £2.5m combined cap on 100% relief (shared with Agricultural Property Relief) means that business owners with larger businesses face a significant IHT bill they may not have anticipated. Above £2.5m, the effective IHT rate on qualifying business assets is 20% (50% relief on the full 40% rate). Business owners should review their wills and succession plans urgently — particularly if they assumed 100% BPR would cover the entire business. Staged lifetime transfers, insurance arrangements, and instalment payment elections become more important.

What has changed for AIM shares and IHT in 2026?

Before April 2026, AIM-listed shares qualified for 100% BPR after a two-year holding period — making AIM shares one of the most popular IHT-planning tools for wealthy investors. From April 2026, AIM shares are subject to the same £2.5m combined cap as other business assets and no longer automatically qualify for 100% relief. The first £2.5m of qualifying AIM shares (combined with other BPR/APR assets) still qualifies for 100% relief; the excess qualifies for only 50%. This changes the economics of AIM portfolios as an IHT planning vehicle significantly.

Can I pass my business on death without selling it?

Yes — BPR means qualifying business assets can pass to beneficiaries at a reduced or zero IHT cost, without the business having to be sold to pay the tax bill. Where IHT is still due (above the £2.5m cap), IHT on qualifying business and agricultural assets can be paid in 10 equal annual instalments (interest-free under the new rules from April 2026 for assets within the cap; interest-charged for the 50% relief tier). This gives the family time to generate income from the business to fund the payments, rather than forcing an immediate sale.

Does my will need to change because of the April 2026 BPR reforms?

Possibly, yes. If your will was drafted on the assumption that 100% BPR would cover the entire business, you should review it in light of the £2.5m cap. Issues to address include: who inherits the business and who pays any IHT above the cap; whether to use instalment payment elections; whether lifetime transfers should be considered to use annual gift exemptions; whether a business protection life insurance policy in trust should fund the IHT liability; and whether the residuary estate has enough liquidity to pay any IHT due before probate.

Related guides

• How to Reduce Inheritance Tax UK: 12 Legal Strategies
• The 7-Year Rule for Inheritance Tax UK
• What Happens to Your Pension When You Die UK
• What Is Estate Planning UK? The Five Key Documents