HMRC told us that its ultimate objective is to reduce the overall tax gap, and it hopes the increase in its compliance activity will reduce the tax gap over the next few years.13 The Office for Budget Responsibility (OBR) has forecast a reduction in the tax gap from 4.8%, at the time it did its calculations, to 4.4% by the end of the forecast period which, if achieved, is expected to equate to an additional annual yield of £7.5 billion.14 Allowing for different levels of wealth