Inheritance Tax Business Property Relief (BPR) Calculator UK 2025/26
Business Property Relief (BPR) is one of the most valuable reliefs in the UK Inheritance Tax system. It can reduce the value of qualifying business assets by 100% or 50% before IHT is calculated, potentially eliminating a very large IHT bill on family businesses, partnerships, and certain company shareholdings. For business owners building significant enterprise value, BPR has historically meant that those assets pass to heirs free from the standard 40% IHT charge.
However, the Autumn 2024 Budget announced a significant change: from 6 April 2026, the 100% BPR rate will be capped at £1 million per person. Assets above £1 million will attract only 50% relief rather than full exemption. This change fundamentally affects estate planning for many business owners and requires proactive review before the April 2026 effective date.
This calculator allows you to model BPR under both the current rules and the post-April 2026 cap, so you can see the IHT impact and plan accordingly. It covers the principal BPR rates and is designed for use alongside professional tax advice for actual estate planning decisions.
Key BPR Facts 2025/26
- 100% BPR: trading businesses, unquoted shares, AIM shares (qualifying companies)
- 50% BPR: controlling quoted company shares; personally-owned land/buildings used in business
- Minimum ownership period: 2 years before death
- From April 2026: 100% BPR capped at £1M per person; above £1M taxed at 50% relief only
- BPR lost entirely if business stops being a qualifying trading business
IHT Business Property Relief Calculator
Calculate the BPR available on business assets and the resulting IHT saving. Includes the April 2026 £1M cap for 100% relief.
This calculator covers the business asset in isolation. Full estate IHT depends on total estate value, residence nil-rate band, spousal exemption, and other reliefs. Always take professional advice for estate planning.
BPR Rates and Qualifying Assets Summary
| Asset Type | BPR Rate (pre-April 2026) | BPR Rate (post-April 2026) | Two-Year Rule |
|---|---|---|---|
| Sole trader / partnership business | 100% | 100% up to £1M; 50% above | Yes |
| Unquoted company shares (trading) | 100% | 100% up to £1M; 50% above | Yes |
| AIM-listed shares (qualifying company) | 100% | 100% up to £1M; 50% above | Yes |
| Controlling quoted company shares (>50%) | 50% | 50% | Yes |
| Land / buildings used in business (personally owned) | 50% | 50% | Yes |
| Investment company / mainly investment assets | 0% | 0% | N/A |
Understanding the April 2026 BPR Changes
Prior to April 2026, a business worth £5 million could pass entirely free of IHT through 100% BPR, generating a tax saving of £2 million (40% × £5M). After April 2026, the first £1 million remains 100% exempt, but the remaining £4 million receives only 50% relief — making £2 million taxable. At the 40% rate, this creates an IHT bill of £800,000 on what was previously a zero-tax estate item.
The combined agricultural and business property relief cap applies across the estate, meaning APR and BPR share the £1 million 100% relief threshold. Estates with both qualifying farming land and business assets need to plan how to allocate the £1M cap between the two reliefs for optimal tax outcomes.
Business owners who have been relying on BPR as their primary succession planning tool need to consider alternative or complementary strategies before April 2026. Options include lifetime gifts (PETs — potentially exempt transfers), family investment company structures, deferred payment arrangements, key person life insurance to fund the increased IHT liability, or accelerating business succession to heirs while values and reliefs are most favourable.
AIM Shares and BPR
AIM-listed shares have been popular in estate planning portfolios specifically because qualifying AIM companies attract 100% BPR after two years of ownership. This made AIM portfolios a relatively accessible way for high-net-worth individuals to shelter wealth from IHT while maintaining investment liquidity. The April 2026 £1M cap significantly changes this calculation.
The two-year holding period must be met at death, and the company must be a qualifying trading business at that point. AIM companies that move into investment activities, hold significant cash, or change their principal business can lose BPR eligibility — a risk that AIM BPR portfolio managers try to monitor through their selection criteria.
From April 2026, AIM portfolios above £1M will face partial IHT, making the net-of-tax return calculations for AIM BPR portfolios significantly different from the pre-Budget model. Advisers and investors will need to remodel holdings to account for the new cap.
Frequently Asked Questions
1. What is Business Property Relief (BPR) for Inheritance Tax?
BPR is a relief that reduces the value of qualifying business assets for IHT purposes, potentially to nil. It applies to trading businesses, interests in a business partnership, and shares in certain companies. The two rates are 100% (full exemption) and 50% (half value exempt). The relief was created to prevent family businesses from having to be broken up to pay IHT on the owner's death.
2. Which assets qualify for 100% BPR?
100% BPR applies to: an interest in an unincorporated trading business (sole trader, partnership); unquoted shares in a trading company (including AIM-listed shares which HMRC treats as unquoted for BPR purposes); and a controlling holding of unquoted company shares. The company or business must be a qualifying trading business — not mainly investment-based.
3. Which assets qualify for 50% BPR?
50% BPR applies to: a controlling shareholding in a quoted company (over 50%); land, buildings, or machinery owned personally but used in a business you control; and shares in an unquoted company where only a minority interest is held in some cases. The 50% rate means only half the asset value is exempt from IHT.
4. What is the April 2026 BPR cap announced in the Budget?
In the Autumn 2024 Budget, the government announced that from 6 April 2026, the 100% BPR rate will be capped at £1 million per person per estate. Business and agricultural property above £1 million will qualify for only 50% relief instead of 100%. This significantly affects estates with large business holdings and requires careful succession planning before April 2026.
5. How long do you need to own business assets to qualify for BPR?
You must have owned the qualifying business property for at least two years before death (or before the transfer if a lifetime gift). Assets inherited from a spouse or civil partner can inherit the deceased's ownership period for the two-year test. Assets must still qualify at the date of death, not just when originally acquired.
6. Do AIM shares qualify for BPR?
Yes. AIM-listed shares are treated as unquoted for BPR purposes and can qualify for 100% relief if the company is a qualifying trading business and has been held for at least two years. However, not all AIM companies qualify — investment companies, property companies, and businesses not trading do not qualify. From April 2026, the £1M cap will apply.
7. What is a 'trading business' for BPR purposes?
HMRC considers a business to be trading if its activities are wholly or mainly trading rather than investment. The 'wholly or mainly' test is generally interpreted as more than 50% of activities being trading. Businesses holding significant investment portfolios, letting property, or holding land for capital gain risk being classed as investment companies and losing BPR eligibility.
8. Can BPR and APR be claimed on the same assets?
Not generally on the same asset at the same time, but they can apply to different assets in the same estate. For example, a farming estate might claim APR on agricultural land and farmhouse, and BPR on business goodwill or non-agricultural trading activities. Where assets qualify for both, APR takes priority, and BPR applies to any balance not covered by APR.
9. Is BPR affected if business assets are held in a trust?
BPR can apply within trusts for periodic charges and exit charges. If qualifying business property is held in a discretionary trust, BPR may reduce the value used to calculate the 10-year anniversary charge. However, the rules are complex, the two-year ownership requirement applies at the trust level, and trustee investment powers need careful drafting to preserve eligibility.
10. Can you gift business assets to reduce IHT instead of relying on BPR?
Yes. Gifts of qualifying BPR assets made more than seven years before death are fully outside the estate regardless of BPR. However, if you die within seven years of the gift, taper relief and BPR both potentially apply. For assets where BPR provides 100% relief, gifting may not add IHT benefit but could affect control, dividend rights, and Capital Gains Tax depending on the structure.
11. What happens to BPR if a business stops trading before death?
If a qualifying business stops trading before the owner dies and the assets no longer meet the qualifying conditions at the date of death, BPR is lost entirely — even if the two-year ownership test was met during the trading period. This is a critical planning point for business owners considering winding down, selling, or retiring before death.
12. How does BPR interact with Capital Gains Tax on death?
On death, assets receive a CGT uplift to market value, meaning any unrealised gain is wiped out for CGT purposes. This means BPR assets that are fully exempt from IHT also benefit from CGT uplift — a very tax-efficient outcome for heirs who inherit and then sell. Post-April 2026, the partial BPR situation above £1M will still benefit from CGT uplift on the full value.