The Revenue Commissioners made unpublished tax settlements of more than €1.36 billion during the course of last year.
The enormous tax haul related to 62,418 separate disclosures, Revenue said, though more than €1 billion of the total related to just a small number of cases.
They said the top 20 unpublished settlements were worth €1.052 billion, for an average of around €52.6 million each.