Irish corporation tax receipts jumped by almost 50% in 2015 and only 10 firms accounted for about 50% of receipts in the year — a windfall for the Exchequer resulted in a rise in receipts from €4.6bn in 2014 to €6.9bn in 2015. In 2014 Finfacts estimated that about 40 American firms accounted for two-thirds of Ireland’s headline exports in 2013.