It is understood the National Treasury Management Agency, which borrows money on behalf of the country, is planning to raise between €2 billion and €3 billion.
The agency will issue a 20-year bond to raise the funds.
Today the NTMA named a series of banks as managers for the bond issue.
It has mandated Barclays, Cantor Fitzgerald, Danske Bank, HSBC, JP Morgan, and Morgan Stanley as joint lead managers for the bond.