PurposeJob burnout is a popular topic for researchers and a pressing issue for employees and employers. However, the most popular measure has become widely critiqued, and a new construct – the Burnout Assessment Tool (BAT) – has been offered as a better way to assess burnout.Design/methodology/approachThe study uses data from 1,022 employees across a wide range of occupations, sectors and industries. Confirmatory factor analysis (CFA) and odds ratio calculations are explored.FindingsThe present psychometric properties of the BAT construct are supported. Overall, 11.1% of employees met the high burnt-out risk threshold. Determinants of burnt-out risk were explored, with significant findings from high perceptions of organizational support, large firm-size, young age and long work hours found. No gender differences. The odds ratio provides greater insights into the risks associated with factors, especially working 55+ hours/week, which resulted in 580% higher risk of burnt-out risk.Research limitations/implicationsThe findings highlight the danger of burnt-out risk and provide a useful benchmark for those exploring the burnt-out risk rate.Originality/valueThe BAT has not been tested in New Zealand across a sample of employees. Given the large size and breadth of employees, this provides useful generalizability to the BAT-NZ. The determinants tested here are all unique to the literature and provide new insights.