I am advised by Revenue that the removal of the Employee Tax Credit and the Earned Income Tax Credit for individuals with incomes above €100,000 would have yielded an estimated €170 million and €205 million on a first and full-year basis respectively in 2019, the latest year for which fully-analysed data are available.
These estimates do not take account of any potential changes in taxpayer behaviour resulting from the proposed change; for example, a taxpayer on an income of €101,000 would have a lower after-tax pay than a taxpayer on an income of €100,000. The estimates are also based on assumptions on the distribution of credits within taxpayer units.