The 2026 reform of Business Property Relief — long trailed and now confirmed — represents the most significant narrowing of the UK inheritance tax planning landscape in a generation. The relief, which previously allowed qualifying business assets to pass free of inheritance tax, now operates within a capped framework that limits the benefit to £1M of qualifying business value.
The Remaining Shields
Despite the cap, three structurally sound planning options remain. First, the AIM market exemption — shares listed on the Alternative Investment Market continue to qualify for BPR outside the cap, provided the trading conditions are met. This creates a powerful incentive for family businesses to maintain or seek an AIM listing. Second, agricultural property relief remains uncapped, preserving the IHT-free status of qualifying agricultural land and buildings. Third, the woodlands and forestry exemption — often overlooked — provides a genuine tax-efficient vehicle for long-term capital preservation.
The window for implementing these strategies is open but narrowing. The rules take full effect from April 2027, and the transitional provisions favour early action. Families that restructure within the current tax year will secure positions that become progressively more expensive to achieve as the deadline approaches.