Under the model of enterprise bargaining enshrined in the Fair Work Act 2009 (Cth), the primary mechanism for employees to exercise industrial power during negotiations in respect of future wages and conditions is protected industrial action. Access to protected industrial action is contingent upon the employees and their bargaining representatives having complied with a series of statutory prerequisites. The most significant of these is the requirement to hold a pre-strike ballot of the relevant employees to authorise the proposed action. Without approval in a ballot, any industrial action undertaken will be unprotected, leaving the union open to liability under common law and statute, and its members potentially subject to dismissal from employment. This article explores the effect of pre-strike ballots on union decision-making and enterprise bargaining. Drawing on statistical analysis of a cross section of protected industrial action ballot applications made to the Fair Work Commission over a period of 12 months, and grounded theory analysis of interviews with ballot applicants, employer respondents and key stakeholders.</p