The National Treasury Management Agency is not "not prisoners" to plans to issue €9-13 billion of debt this year with its minimum funding needs set to be met next month.
But a second syndicated sale in 2017 is unlikely, its head of funding has said.
The NTMA has raised over €8 billion through bond sales and its first ever inflation-linked issue.
It will not stay out of the market in the second half so will likely at least end up somewhere between its stated funding range, Frank O'Connor told Reuters in an interview.
"If circumstances change and we feel we like markets and do something else so be it, we reserve that right. We have had a tradition of predicting the ranges reasonably well but we are not prisoners to the range," Mr O'Connor said.
He said he saw that issuance continuing by auction rather than a larger placement via a syndicate of banks which is not in the agency's thoughts at present.
However he said there was a "high chance" that the National Treasury Management Agency would issue a new 10-year benchmark bond at the latest at some stage next year.
Options over the next couple of years may also include more inflation-linked bonds, O'Connor said, anticipating debt that could be tied to either domestic or euro zone inflation rates and develop into public issues of benchmark size, which for that line of funding would be around €1 billion, he said.
With Ireland's refinancing needs set to rise over the next three years, the NTMA could also offer holders of the debt maturing in that period the opportunity to switch into longer-dated bonds.
One foray that is less likely is a debut dollar-denominated bond with US investors increasingly looking elsewhere having been early buyers of Irish debt when Dublin returned to bond markets in 2012 following an international bailout.
"The amount of the American investors watching and wanting to play our credit has dissipated. It's not that they are negative on the credit but they like to go for more return," he said.
