The Government is expected to reveal how it will spend the Apple tax windfall on Budget Day.
Taoiseach Simon Harris told a Fine Gael meeting last night that he hopes to reveal how €14 billion will be spent on October 1st.
He has already hinted that it will be used for infrastructure.
IDA CEO Michael Lohan told Breakfast Business the money must be invested in infrastructure.
"We've been very clear over many years of what's necessary to create the right conditions from the FDI perspective," he said.
"We've been very clear that we need to continue to invest in infrastructure.
"It's not just for enterprise it's actually for society as a whole.
"Our economy has grown, our population has grown and we need to be sure we keep at pace with that."
Mr Lohan said the country is coming into the process "from a point of real strength" - pointing to good demographics and finances.
He added that the ruling hasn't been raised with him "in terms of concern" by client companies.
An Apple iPhone in front of Government Buildings in Dublin. Image: Sam Boal/Rollingnews.ieEarlier this week Mr Harris told Newstalk the money should be spent on a legacy project.
"You can't spend this money on recurrent day-to-day spending," he said.
"You only get it once so you can only invest it and spend it once.
"You can spend it on things that are called one-off [projects] - you can absolutely invest it in infrastructure, you can absolutely invest it in capital.
"I think that's the space we should be looking at".
Mr Harris said the country has "very serious constraints" when it comes to infrastructure and things that make us competitive.
There has been widespread speculation as to where the Apple tax money will go - with calls for more hospitals, housing and even an Olympics 2036 bid among the suggestions.
Reporting by: Stephanie Rohan
