US multinationals owe HMRC £4.6bn in unpaid tax

US-based companies could be faced with an additional £4.6bn in UK tax bills for the year ending 31 March 2018 as HMRC's clampdown on companies diverting profits overseas ramps up. The tax gap was up 35% from £3.4bn in the previous year, according to research from Pinsent Masons, which calculates US-based multinationals account for 17% of the total amount of tax that HMRC was targeting last year, with a total of £27.8bn in underpayments by large corporates. The most recent figures, obtai...