HMRC Business Records Reconstruction Expert Witness UK

Business records reconstruction is HMRC's technique for estimating undeclared turnover where business records are inadequate or incomplete. HMRC applies mark-up analysis (applying expected profit margins to purchases), lifestyle analysis (comparing personal expenditure to declared income), and industry comparisons to produce a figure for undeclared income.

Tax expert witnesses challenge whether the correct methodology was applied and whether the figures are supportable. HMRC publishes guidance on approved reconstruction methods, including the cash flow method, the mark-up/margin method, and the lifestyle method. Where HMRC fails to follow its own approved methods, a tax expert witness can demonstrate the correct approach and produce more reliable results.

In one notable case, HMRC relied on a forensic accountant's reconstruction showing undeclared takings of £600,000. Independent expert review indicated the HMRC report relied on flawed and untested data, ignored actual circumstances, and did not accord with HMRC's own approved reconstruction methods, the correct figure was £100,000.