I am advised by the Revenue Commissioners that the number of income earners that would be additionally exempted from the Universal Social Charge (USC) by increasing the USC threshold from €13,000 to €19,572 is estimated to be in the order of 277,000.
These figures are estimates from the Revenue tax forecasting model using latest actual data for 2013, the latest year for which data is available, adjusted as necessary for income, self-employment and employment trends in the interim. They are estimated by reference to 2016 incomes and are provisional and may be revised.