The purpose of this study was to describe health promotion behaviors and work productivity loss in informal caregivers of individuals with advanced stage cancer. Using a cross-sectional, correlational design, 70 caregivers completed measures of health behaviors, mood, social support, and burden. Absenteeism and presenteeism were evaluated in employed caregivers (n = 40). Caregivers reported low levels of physical activity. The mean percentage of work productivity loss due to caregiving was 22.9%. Greater work productivity loss was associated with greater number of caregiving hours, higher cancer stage, married status, and greater anxiety, depression, and burden related to financial problems, disrupted schedule, and health. Nurses should assess caregivers and provide health promotion interventions, which may ultimately reduce the economic impact of caregiving. [Copyright John Wiley and Sons, Ltd.]