IHT Business Property Relief 2026 UK: The New £1m Cap on BPR and APR Explained

The October 2024 Budget announced the most significant reform to business property relief (BPR) and agricultural property relief (APR) since they were introduced in their modern form in 1984 and 1992 respectively. The changes took effect from 6 April 2026: (1) THE OLD POSITION (BEFORE APRIL 2026): qualifying business property (sole trader businesses, partnership interests, unquoted shares including AIM, and qualifying assets) attracted 100% BPR — eliminating IHT on unlimited value. Agricultural property attracted 100% APR on agricultural value (with the same unlimited scope). A business owner with a business worth £10m could pass it to heirs free of IHT entirely; (2) THE NEW POSITION (FROM 6 APRIL 2026): (a) The first £1,000,000 of combined BPR and APR qualifying value per person attracts relief at 100% (IHT rate = 0% on this portion); (b) Any BPR/APR qualifying value ABOVE £1m attracts relief at only 50% (IHT rate = 20% on this portion — half the standard 40% rate); (c) The £1m cap applies per individual, not per estate — a married couple each has a £1m allowance, so combined £2m at 100%; (d) All other IHT reliefs and exemptions (NRB, RNRB, spouse exemption) remain available on top of the reformed BPR/APR; (3) AIM SHARES: from 6 April 2026, AIM-listed shares no longer qualify for 100% BPR. They attract 50% BPR only on their full value — i.e. the same rate as the above-£1m tranche under the reformed regime. The £1m 100% cap does NOT include AIM shares — AIM qualifying value is separately subject to 50% BPR; (4) INSTALMENT OPTION: qualifying business and agricultural property above the £1m 100% threshold (taxable at 20%) qualifies for the IHT instalments option under IHTA 1984 s.227 — IHT payable in 10 annual interest-free instalments, provided the property remains qualifying and is not sold; (5) WORKED EXAMPLE: sole trader business worth £2.4m; personal estate (home, savings) worth £600,000. Total estate = £3m. Available allowances: NRB £325,000; RNRB £175,000 (home to children). Net estate after allowances = £2.5m. BPR: first £1m at 100% = 0 IHT; remaining £1.4m at 50% BPR = 50% of 40% = 20% IHT on £1.4m = £280,000. Personal estate (£600,000 less NRB £325,000 less RNRB £175,000) = £100,000 at 40% = £40,000. Total IHT: £320,000. Under the pre-April 2026 rules, BPR at 100% on the entire business = £0; personal estate IHT = £40,000. The reform costs this estate £280,000 in additional IHT.

The reformed BPR/APR cap fundamentally affects the estate planning position of business owners and farmers with qualifying assets above £1m: (1) MOST AFFECTED: (a) Family business owners with businesses worth more than £1m — previously the entire business was BPR-exempt; now only the first £1m (per person) is fully exempt; (b) Farmers and landowners with qualifying agricultural property (farm, farmhouses, grazing land) worth more than £1m — the APR is subject to the same £1m cap; (c) AIM share investors — previously used AIM as an IHT planning vehicle (buy qualifying AIM shares, hold 2+ years, pass free of IHT); now only 50% BPR applies; (d) Partners in qualifying businesses — partnership interests are still qualifying business property but within the capped structure; (2) THE CONTINUING PRE-CAP RELIEFS: (a) BPR/APR remain available — the relief still exists, it is just capped at £1m per person at the 100% rate; (b) Businesses conducting genuine trading activities (not investment) still qualify; (c) The 2-year minimum holding period still applies; (d) Assets and activities that were excluded before (buy-to-let; investment holding companies; dealing in land) remain excluded; (3) BUSINESSES THAT REMAIN FULLY EXEMPT FOR THE FIRST £1M: EVERY qualifying business qualifies for full 100% BPR up to £1m. A sole trader business worth £800,000, or a partnership share worth £600,000, is still fully BPR-exempt. The reform only bites above £1m of combined qualifying value; (4) THE COUPLE ADVANTAGE: each member of a married couple or civil partnership has their own £1m cap. Jointly-owned qualifying assets can be structured to use both caps: a farming couple with £2m of qualifying agricultural land can — if structured correctly — potentially achieve 100% APR on the full £2m at death. HOWEVER: joint ownership must be genuine; tenancy-in-common shares may each attract separate relief; advice from a specialist agricultural solicitor and IHT planner is essential; (5) THE ANNUAL EXEMPTION AND GIFTING: the reform makes lifetime gifting of qualifying assets MORE attractive before death. A gift of qualifying business/agricultural property still benefits from BPR/APR on the transfer (reducing the chargeable value). Gifts made now may also benefit from taper relief if the donor survives 3+ years.

The interaction between reformed BPR, NRB, RNRB, and the death estate requires a careful step-by-step calculation: (1) THE CALCULATION ORDER: (a) Step 1: identify all estate assets; (b) Step 2: apply all available reliefs — deduct BPR/APR (first £1m at 100%; then 50% on the excess) from qualifying assets; (c) Step 3: deduct liabilities, funeral costs, and reasonable administration costs; (d) Step 4: apply the NRB (£325,000 per person); (e) Step 5: apply the RNRB (£175,000 per person) if the estate includes a qualifying residential interest passing to direct descendants; (f) Step 6: apply any TNRB and TRNRB from a predeceased spouse; (g) Step 7: apply the spouse/civil partner exemption on assets passing to the surviving spouse (these pass exempt regardless of the above); (h) Step 8: calculate IHT at 40% on the remaining taxable estate. Charitable giving of 10%+ of the net estate reduces the rate to 36%; (2) WORKED EXAMPLE — FARMER WITH LARGE FARM: Farm agricultural value = £2.5m; non-agricultural market value uplift = £500,000 (planning potential). Personal estate = £800,000 (house £450,000; investments £350,000). Spouse exemption: personal estate passes to spouse — IHT deferred to second death. APR on first death: first £1m at 100% → £0 IHT; remaining £1.5m at 50% APR → 20% on £1.5m = £300,000 IHT on farm. The market value uplift (£500,000) does NOT qualify for APR — only agricultural value qualifies. IHT on uplift = 40% × (£500,000 - NRB £325,000) = £70,000. Total first death IHT: £370,000 (farm + uplift; personal estate deferred). Under old rules: APR at 100% on full £2.5m agricultural value = £0; market uplift IHT same = £70,000. Reform costs: £300,000; (3) SPOUSE EXEMPTION STRATEGY: transferring qualifying assets to the surviving spouse does NOT use up the BPR/APR — the spouse then benefits from their OWN £1m cap on their death. By leaving the business/farm to the surviving spouse (spouse exemption at first death) and relying on both partners' caps at the second death, a couple can potentially pass up to £2m of qualifying value at 100%. The instalment option also helps with cash flow: the 20% IHT on amounts above £1m can be spread over 10 years interest-free while the business continues; (4) INTERACTION WITH TAPER RELIEF ON LIFETIME GIFTS: if qualifying business/agricultural property is gifted in the owner's lifetime, BPR/APR may apply to reduce the chargeable value of the gift. The reformed cap applies at the date of the gift if the gift is made after 6 April 2026. Gifts made before April 2026 may qualify under the old unlimited relief rules if the donor survives 7 years.

Business property relief under IHTA 1984 ss.103-114 has always had strict qualifying conditions — and the reformed regime retains them: (1) QUALIFYING PROPERTY AND RATES (FROM APRIL 2026): (a) Sole trader business or interest in a business (e.g. partnership share): BPR 100% up to £1m combined cap; 50% above (b) Unquoted shares or securities in an unquoted company: BPR 100% up to £1m combined cap; 50% above; (c) AIM-listed shares (shares on a recognised junior market): BPR 50% ONLY — no longer part of the 100% cap; (d) Quoted shares in a company in which the transferor has a controlling interest: BPR 50% — always was 50%; (e) Land, buildings, or machinery owned by the transferor and used mainly by a qualifying company or partnership of which the transferor is a partner: BPR 50%; (2) MINIMUM HOLDING PERIOD: qualifying property must have been owned for a minimum of 2 years immediately before the transfer (death or gift). There are exceptions for replacement property (IHTA s.107); (3) NOT QUALIFYING — EXCLUDED ACTIVITIES: BPR is denied where the business consists wholly or mainly of: (a) investment — managing, making, or holding investments (includes buy-to-let residential landlords; investment property companies holding let properties; SPVs holding investments); (b) dealing in investments; (c) dealing in land or buildings; (d) making or holding investments. A 50%+ investment activity business (by revenue, assets, or time) may lose BPR entirely. HMRC applies the 'wholly or mainly' test — more than 50% of the business by value and activity must be trading; (4) EXCEPTED ASSETS: even within a qualifying business, assets that are not used in the business (excess cash; non-business property; investments) are excepted assets and are excluded from BPR (IHTA s.112). Only the business-use portion qualifies; (5) FURNISHED HOLIDAY LETTINGS: post-HMRC Brander and other cases — FHL businesses may qualify for BPR if the service element is sufficiently significant to constitute a business rather than mere investment; the treatment has varied; HMRC has been challenging FHL BPR claims; specialist advice required.

The reform from April 2026 makes IHT planning for business owners and farmers significantly more complex — but several strategies remain available: (1) MAXIMISE USE OF BOTH SPOUSES' £1M CAPS: each spouse/civil partner has their own £1m cap. Ensuring qualifying assets are split between spouses (genuine co-ownership; tenancy-in-common) means a couple can access up to £2m of 100% BPR/APR at death. Equalisation of qualifying assets between spouses is one of the most immediate planning steps; (2) INSTALMENT OPTION (IHTA 1984 s.227): IHT on qualifying business/agricultural assets above the £1m cap (taxed at 20%) can be paid in 10 annual interest-free instalments, provided the asset is retained (not sold). This preserves cash flow for business continuation. If the asset is subsequently sold, the outstanding instalments become due immediately; (3) LIFETIME GIFTS OF QUALIFYING ASSETS: transferring business or agricultural assets to the next generation now, while the donor is alive, may be more efficient: (a) the transfer is a PET (or a CLT if to a trust); (b) BPR/APR reduces the chargeable value of the gift (using the same £1m cap rules); (c) if the donor survives 7 years, the gift is fully exempt; (d) even if the donor survives only 3-7 years, taper relief reduces the IHT further; (e) the recipient's own eventual estate may use their own BPR/APR £1m cap when they die; (4) FAMILY INVESTMENT COMPANIES (FICs): for cash and investment assets (which do not qualify for BPR), an FIC can be used to hold investments and facilitate succession. FIC shares may attract some (limited) BPR if the company has a genuine trading component; (5) TRUSTS — RELEVANT PROPERTY TRUSTS: placing qualifying business/agricultural assets into a discretionary trust before death: (a) CLT charged at 20% on value above NRB; (b) BPR/APR reduces the chargeable value at the date of the CLT; (c) ongoing 10-year periodic charges (IHTA s.64 — 6% of value above NRB) apply; but BPR/APR should apply to reduce the charge at each periodic charge date; (d) exit charges on distributions similarly reduced by BPR/APR; note: the £1m cap applies at the CLT date; the trust's ongoing qualifying assets get BPR/APR at each 10-year charge; (6) SEEK SPECIALIST ADVICE: the interaction of reformed BPR/APR with NRB, RNRB, taper relief, trusts, and gifting is complex. A farm or business worth £2-5m requires specialist IHT planning advice — a general solicitor's standard will is insufficient.