Special advisers for Taoiseach Micheál Martin, Tánaiste Leo Varadkar and Green Party leader Eamon Ryan are set to cost taxpayers at least €1.5m a year, the Irish Independent can reveal.
The Coalition leaders have 17 special advisers between them, with salaries ranging from €74,000 to as much as €180,000.
The Government has come under opposition criticism for the number of advisers being appointed by the party leaders.
The most highly paid are Mr Martin, Mr Varadkar and Mr Ryan's chiefs of staff.
Deirdre Gillane, Mr Martin's chief of staff, is entitled to pay of €180,276 as she is on the deputy secretary salary scale for the civil service.
Brian Murphy, Mr Varadkar's chief of staff - now and in the last government - is in line for the same salary.
The €180,276 is actually just over €8,000 more than the €172,263 Mr Varadkar will be paid after government ministers agreed to waive 10pc of their salaries.
Transport Minister Eamon Ryan has joint chiefs of staff - Anna Conlan and Donall Geoghegan. They are both on the assistant secretary salary scale of between €139,628 and €159,725.
Details of the salary scales for special advisers came in response to parliamentary questions from Labour leader Alan Kelly and Social Democrats co-leader Catherine Murphy. The precise pay for each adviser was not revealed.
The Department of the Taoiseach did not provide the Irish Independent with details on how much three advisers who work part-time are paid.
But the cumulative total salaries for the 14 full-time special advisers - based on the figures for the lower end of the salary scales - comes to at least €1.5m. Mr Martin has six special advisers, including deputy chief of staff Pat McPartland who is on the assistant secretary salary scale of €139,628 to €159,725.
NUI Galway professor Alan Ahearne is Mr Martin's economic adviser. He is listed as part-time on a salary scale described as "assistant secretary equivalent".
Mr Varadkar also has six special advisers, with his head of policy and programme implementation, John Carroll, on the assistant secretary scale.
Nine of the advisers to the three leaders are on the principal officer salary scale that starts at €87,325. They include advisers to Mr Martin, Kevin Dillon, Gráinne Weld and Diarmuid Lynch, who worked in Fianna Fáil's policy and research office; and three advisers to Mr Varadkar: Angela Flanagan, Philip O'Callaghan and Clare Mungovan.
Mr Ryan has one full-time adviser on the principal officer salary scale, Eamonn Fahey, and two others who work part-time in the same bracket, David Healy and Niamh Allen.
A government statement said special advisers have been appointed since the early 1990s. "They perform an essential role in government, providing external expertise, acting as a liaison between a minister and their department and with the wider civil service, and monitoring implementation of the Programme for Government," it said.
They provide briefings and advice on a wide range of policy matters and are required to be available to advise their minister at all times, it added.