Business Property Relief and Inheritance Tax
Business Property Relief (BPR) is one of the most powerful inheritance tax reliefs available to UK estate owners. At its most generous, it eliminates IHT entirely on qualifying business assets — saving up to 40p in tax for every pound of business value. Following the April 2026 Budget reforms, the relief has been significantly restructured. This guide explains what qualifies, what the new limits mean in practice, and how to plan around the changes.
Key BPR Thresholds for 2026/27
What Is Business Property Relief?
Business Property Relief reduces the value of qualifying business assets for inheritance tax purposes. The relief is applied before IHT is calculated, meaning a £1,000,000 business qualifying for 100% BPR contributes nothing to the taxable estate.
BPR was introduced to prevent family businesses from being broken up to pay inheritance tax on the death of an owner. The principle is that productive business assets should pass intact to the next generation, preserving employment and economic activity.
The relief is claimed on the IHT return (form IHT400 with supplementary form IHT413). HMRC scrutinises BPR claims carefully, particularly where the business holds significant investment assets or where ownership conditions are borderline.
What Assets Qualify for Business Property Relief?
BPR applies to different asset types at different rates.
| Asset type | Relief rate | Notes |
|---|---|---|
| A sole trader business or share in a partnership | 100% | Must be a trading business — not primarily investment |
| Shares in an unquoted trading company | 100% | Includes AIM-listed shares (50% from April 2026) |
| Shares in a quoted company where you had control | 50% | Control = more than 50% of voting rights |
| Land, buildings, or machinery owned personally and used in a partnership or company you control | 50% | Must be used in the business at date of death |
| Shares in a quoted company (minority holding) | No relief | Ordinary listed shares do not qualify |
| Investment property or buy-to-let | No relief | Primarily investment businesses are excluded |
| Cash or liquid investments held in a business | Partial or none | HMRC may attribute investment assets proportionally |
Relief rates depend on the asset type and ownership structure. From April 2026, the combined APR/BPR allowance applies.
Conditions for Claiming Business Property Relief
To qualify for BPR, the following conditions must all be met:
The two-year ownership rule is the most commonly missed condition. BPR is not available if you owned the business or shares for less than two years before death. If you are planning ahead, ensure any BPR-qualifying investments are held for the full qualifying period.
1. Two-year ownership: The asset must have been owned continuously for at least two years immediately before the date of death (or the date of a chargeable lifetime transfer).
2. Trading business requirement: The business must be wholly or mainly a trading business. HMRC uses a 'wholly or mainly' test — broadly, more than 50% of the business activity must be trading rather than investing. Businesses that hold significant investment assets (cash, portfolios, rental property) alongside trading activity are at risk of failing this test.
3. Not a binding contract for sale: If the business was subject to a binding sale contract at the date of death, BPR is not available.
4. Active business at date of death: The business must still be trading at the date of death. A dormant or wound-up business does not qualify.
5. Not excepted assets: Certain assets within a qualifying business are excluded from BPR — primarily assets not used for business purposes, and assets held as investments.
The April 2026 BPR Reforms: What Changed
The Autumn 2024 Budget introduced the most significant changes to BPR in decades, taking effect from 6 April 2026. The reforms affect business owners, farmers, and AIM share investors differently.
| Asset | Before April 2026 | From April 2026 |
|---|---|---|
| Sole trader / partnership / unquoted shares | 100% relief — no limit | 100% relief on first £2.5M combined APR/BPR, then 50% above |
| AIM shares | 100% relief | 50% relief — effectively a 20% IHT rate |
| Agricultural property (APR) | 100% relief — no limit | Shares the £2.5M combined allowance with BPR |
| Combined APR + BPR above £2.5M | N/A | 50% relief — effectively 20% IHT rate |
The April 2026 reforms introduce a combined cap on APR and BPR for the first time.
The £2.5M allowance is per person, not per asset. Where a deceased held both agricultural property and qualifying business assets, the allowance is shared between them. Married couples each have their own £2.5M allowance, but unlike the nil rate band, unused BPR/APR allowance cannot be transferred between spouses.
For most small business owners with estates below £2.5M in qualifying assets, the practical effect is unchanged — full 100% relief continues to apply. The changes bite most significantly for larger farming estates, family businesses with high asset values, and investors holding large AIM portfolios.
AIM Shares and BPR After April 2026
AIM-listed shares in qualifying trading companies have historically been a popular BPR planning tool because they could be bought and sold like ordinary shares while qualifying for 100% IHT relief after a two-year holding period.
From April 2026, AIM shares qualify for 50% relief only, making them subject to an effective IHT rate of 20% (50% relief on a 40% tax rate). This is still preferential compared to ordinary listed shares, which attract the full 40% rate, but substantially less attractive than the previous 100% relief.
For investors who built AIM portfolios specifically for IHT planning, the reform reduces — but does not eliminate — the tax advantage. The two-year ownership requirement and investment risk remain unchanged. Specialist financial advice is recommended before making or continuing AIM investments for IHT purposes.
AIM shares carry significant investment risk. They are typically less liquid and more volatile than main market shares. The IHT benefit should never be the sole reason for holding AIM investments — the underlying investment case must stand on its own merits.
Worked Examples
James is 68 and runs a successful sole trader plumbing business. He has owned the business for 12 years. His estate also includes his home and savings.
| Main residence | £420,000 |
| Business assets (sole trader) | £800,000 |
| Savings & ISAs | £95,000 |
| Personal possessions | £20,000 |
| Total gross estate | £1,335,000 |
| BPR on business (100% — under £2.5M allowance) | −£800,000 |
| Net taxable estate | £535,000 |
| Less NRB + RNRB | −£500,000 |
| Taxable amount | £35,000 |
| Estimated IHT (40%) | £14,000 |
Without BPR, James's taxable estate would be £835,000 above his thresholds — an IHT bill of £334,000. BPR reduces the bill to £14,000, saving £320,000 in tax. The two-year ownership condition is met comfortably after 12 years.
Helen is 72 and holds shares in an unquoted family manufacturing company valued at £4,000,000. She has no agricultural property. Her other assets total £600,000.
| Unquoted company shares | £4,000,000 |
| Other assets | £600,000 |
| Total gross estate | £4,600,000 |
| BPR: 100% on first £2,500,000 | −£2,500,000 |
| BPR: 50% on remaining £1,500,000 | −£750,000 |
| Net business value after BPR | £750,000 |
| Total taxable estate | £1,350,000 |
| Less NRB (£325,000) | −£325,000 |
| Less RNRB (assume qualifying) | −£175,000 |
| Taxable amount | £850,000 |
| Estimated IHT (40%) | £340,000 |
Under the pre-April 2026 rules, full 100% BPR on the entire £4,000,000 would have reduced the business to zero for IHT purposes, leaving only £600,000 in the estate — well within the thresholds. The reform introduces a significant liability for larger business estates. Early planning — including life insurance written in trust to cover the liability — is important.
Common Mistakes When Claiming Business Property Relief
| Mistake | Why it matters | What to do |
|---|---|---|
| Assuming all business assets qualify | Investment assets within a business (excess cash, portfolios, rental properties) may be excluded proportionally | Identify which assets are trading assets and which are investment assets — get a specialist valuation |
| Missing the two-year ownership rule | BPR is not available if the asset was owned for less than two years | Plan transfers and acquisitions carefully; document ownership dates |
| Overlooking the April 2026 £2.5M cap | Pre-2026 planning assumed unlimited 100% relief — this no longer applies above £2.5M | Remodel the estate with the new cap; consider life insurance in trust for the residual liability |
| Treating AIM shares as 100% exempt | From April 2026, AIM relief is 50% only | Update any AIM portfolio IHT modelling; consider whether the investment case still justifies the holding |
| Not combining APR and BPR correctly | Agricultural and business property share the same £2.5M allowance | Model both reliefs together — the combined cap applies, not separate caps |
| Failing to document the trading status | HMRC may challenge borderline trading/investment businesses | Keep clear records of business activity, turnover mix, and asset use |
Professional advice is recommended for estates involving business assets or the April 2026 reforms.
Frequently Asked Questions
What is Business Property Relief and how does it work?
Business Property Relief (BPR) is an inheritance tax relief that reduces the taxable value of qualifying business assets by 50% or 100%. A sole trader business qualifying for 100% BPR contributes nothing to the taxable estate, regardless of its value (subject to the £2.5M combined APR/BPR allowance from April 2026). BPR is claimed on the IHT return after death and applies automatically if the conditions are met — there is no advance registration required.
Do I need to have owned my business for 2 years to claim BPR?
Yes. The two-year ownership condition is a hard requirement. The asset must have been owned continuously for at least two years immediately before the date of death. There is a replacement property rule — if you sold a qualifying business and reinvested in another qualifying business within three years, the combined ownership periods can be aggregated. But in general, BPR planning requires a minimum two-year lead time.
Can I claim BPR on shares in my family company?
Yes, provided the company is an unquoted trading company and you have owned the shares for at least two years. From April 2026, 100% relief applies on the first £2.5M of combined APR and BPR qualifying assets, with 50% relief above that. The company must be primarily a trading business — companies that hold significant investment assets alongside trading activity may only receive partial relief.
Are AIM shares still good for IHT planning after April 2026?
AIM shares still offer preferential IHT treatment compared to main market shares — 50% relief results in an effective IHT rate of 20% rather than 40%. However, the previous 100% relief has gone. For investors who held AIM shares specifically for full IHT exemption, the change materially affects the planning benefit. The investment risks of AIM shares — lower liquidity, higher volatility — are unchanged. Specialist advice is important before making or retaining AIM investments for estate planning purposes.
What happens if my business holds a lot of cash?
Excess cash held in a business that is not required for trading purposes is known as an 'excepted asset' and does not qualify for BPR. HMRC will attribute a proportion of the business value to investment assets and restrict the relief accordingly. The definition of 'required for trading' is fact-specific, but as a general principle, cash beyond 12-18 months' working capital requirements is at risk of challenge. Retaining documented evidence of why cash reserves are required for trading purposes is important.
Can BPR be transferred between spouses like the nil rate band?
No. Unlike the nil rate band and residence nil rate band, unused BPR allowance cannot be transferred from a deceased spouse to the survivor. Each person has their own £2.5M BPR/APR allowance from April 2026, but it is use-it-or-lose-it on death. This makes early planning more important — if the first spouse to die holds qualifying business assets within their own estate, those assets should be structured to use their allowance on the first death where possible.
Model Your Business Assets in the Full IHT Calculator
Use Estate Map to calculate inheritance tax on your full estate including business assets, the April 2026 APR/BPR reforms, the £2.5M allowance, and the impact on your overall IHT position.
Calculate my IHT →This guide provides general information only and does not constitute financial or tax advice. Business Property Relief rules are complex and depend on individual circumstances. Always seek advice from a qualified financial adviser, solicitor, or chartered tax adviser before making estate planning decisions.