HMRC Inheritance Tax Enquiries Hit Six-Year High of 4,940 as Crackdown Intensifies

The Quick Take

• HMRC opened 4,940 formal inheritance tax enquiries in the last financial year — an 18% increase and the highest in six years.
• The surge follows a government-led crackdown on inheritance tax avoidance and non-compliance by UK households.
• Chartered accountants Price Bailey obtained the data, pointing to intensified HMRC enforcement across family trusts, agricultural relief, and business relief structures.

The UK's HM Revenue and Customs opened 4,940 formal inheritance tax enquiries in the most recent financial year — an 18% jump and the highest investigation rate in six years. The surge follows explicit government policy directives to reduce inheritance tax avoidance, a mandate that has intensified scrutiny of family trusts, agricultural property relief claims, and business relief structures used to shelter estates from the 40% inheritance tax rate applied above the nil-rate band. Data sourced from chartered accountants Price Bailey points to a sustained enforcement posture that is fundamentally reshaping UK estate planning strategies and creating a more adversarial relationship between HMRC and wealth advisors.

Heightened HMRC enforcement creates incremental advisory fee income for UK private client lawyers, tax advisors, and chartered accountancy firms as wealthy families restructure estates under elevated audit risk. Wealth management firms Quilter and St. James's Place, which rely on inheritance tax planning products, face client uncertainty during the enforcement spike — high-net-worth individuals may pause new trust formations or insurance policy set-ups until HMRC's audit focus becomes clearer. The broader UK wealth management sector sees mixed signals: enforcement drives advisory demand but reduces product sales during uncertainty phases, while insurance-backed IHT planning products like whole-of-life policies may see demand acceleration as families seek simpler compliant structures.

HMRC's formal guidance update on agricultural property relief and business relief — following recently announced policy changes — will determine which estate planning vehicles become preferred structures under the new enforcement environment. The Office of Tax Simplification's forthcoming inheritance tax review timeline is the key policy variable: any structural simplification of IHT would reduce dispute frequency and advisory complexity. The macro variable is UK property valuations — rising property values mechanically push more estates over the nil-rate band, creating a larger HMRC enforcement target pool regardless of avoidance activity, and sustaining elevated enquiry volumes even without additional policy intent.

Synthesized from 1 source.