IFS revenue composition spreadsheet A spreadsheet with total UK government revenues since 1946 and a breakdown of revenues since 1978. IFS revenue composition spreadsheet Share: Downloads IFS revenue composition spreadsheet (144.32 KB) Downloadable spreadsheet. Related content Composition of estates by value, among those reported to HMRC, 2020–21 Taxlab Data Item Distribution of estate values and average effective inheritance tax rate among taxpaying estates worth more than £300,000 and reported to HMRC, 2020–21 Taxlab Data Item Inheritance tax reductions for gifts before death, 2023–24 Taxlab Data Item Specific gift exemptions in inheritance tax Taxlab Data Item