Leo Varadkar has said there's no Plan B if a programme for government isn't passed this week.
Members of Fine Gael, Fianna Fáil and the Greens will continue to cast votes today ahead of the results being announced on Friday.
f they're approved, Micheál Martin will be elected as Taoiseach on Saturday.
But Varadkar has admitted there isn't a back up plan.
"To be frank - there isn't.
"I know there are some people in my party counselling me and advising me to have a Plan B on the shelf, but I decided not to do that, because we entered these coalition talks in good faith with Fianna Fáil and the Greens.
"I thought it would have been an act of bad faith having a Plan B on the shelf, so we don't have that."
