Aims: To identify the characteristics of carers and their recipients (geriatric cancer survivors), carer psychological morbidity/resilience, and psychological variables and carer/survivor characteristics predictive of subjective carer burden. Methods: Of 100 anticipated respondents, 76 carers of geriatric cancer survivors aged ≥ 70 years completed a cross-sectional questionnaire including study-specific questions on carer/survivor demographics and health characteristics alongside standardised measures of depression, anxiety, stress, coping, quality of life, mindfulness, and subjective burden. Results: Carers were mainly female, elderly (M = 65 years) spouses, not working, sole care-giving 35+ hours per week. Survivors were on average 76 years old, 53.9% male, on average 3.3 years since diagnosis, mainly reporting no or limited symptoms. According to the DASS21, 19.1% and 23.6% of carers reported moderate-to-extremely severe anxiety and depression, respectively. Daughters compared to spouses showed higher degrees of psychological morbidity, as did those caring for survivors > 5 years post-diagnosis. Given that all psychological variables assessed in the current study were significantly associated (p < .02) with subjective carer burden, all variables with moderate univariate associations r ≥ .30 were included in a linear regression. A significant model (p = .000) accounted for 59% of subjective carer burden variability (adjusted R2). Of individual predictors, higher depression (β = .34), use of emotion-focused coping (β = .30), and greater years since diagnosis (β = .25) were significant. Other predictors (stress, quality of life, problem-focused, and dysfunctional coping) were not significant. Conclusions: The Brief Assessment Scale for Caregivers of the Medically Ill (BASC), a 14-item measure of subjective carer burden appears to be a short and easy-to-administer scale and thus could be successfully employed as a screening tool for psychological morbidity (or resilience) in carers of geriatric cancer survivors. Future research should trial the BASC for identifying at-risk individuals who may require further psychological intervention.