Fine Gael will hold a Dáil vote on protecting Ireland's 12.5% Corporation Tax rate next week.
Party leader Enda Kenny has said there are "genuine fears" the Fianna Fáil/Green coalition will sacrifice the low rate as part of bailout negotiations.
He is also calling on Sinn Féin to clarify its position on Corporation Tax and state whether it will back Fine Gael's Private Members Debate on the issue.