The Revenue Commissioners has recouped a total of €179.4m between April and June and published a list of tax defaulters from whom it has received €17.56m.
There were four cases in which the amount of tax owed was more than €1m.
The biggest individual case involves a tax settlement of €2,565,442 by solicitor Barry Fitzgerald of Forster Street, in Galway.
The next highest settlement was by fisherman Cornelius Minahane, of Curramore, Filane Castletownbere, who had to pay €1,192,843.25.
Another Galway solicitor, Gerard A Moylan of Lake Road, Loughrea, settled for €1,286,842.14.
The fourth settlement exceeding €1m was by business and management consultant Paul McGlade of Upper Merrion Street, Dublin 2.
He paid the Revenue Commissioners €1,024,184.80.
Also on today's list of tax defaulters is Fine Gael councillor Anne Devitt of Lispopple, in Swords.
The Fingal councillor made a settlement of €50,000 for under-declaration of income tax and capital gains tax.
The €50,000 included interest and penalties of €20,497.00.
The owner of a lapdancing club in Dublin's Leeson Street also made a substantial settlement with the Revenue Commissioners.
Mary Cullen, who is listed as a private members' club proprietor of Lower Leeson Street, Dublin 2, paid €261,736 for under-declaration of VAT and PAYI/PRSI.
The 87 tax defaulters named in today's list reached their settlements with the Revenue Commissioners between April and June this year.
38 of the published settlements were for amounts exceeding €100,000.
Tax defaulters are only liable to be named publicly if the total amount of tax, interest and penalties owed exceeds €30,000; where the penalty exceeds 15% of the amount of the tax owed, and where there has been no voluntary disclosure.
Of the 87 settlements, 36 relate to the so-called special investigations involving Ansbacher and bogus non-resident accounts, offshore funds, and single premium insurance products cases.