Aims The purpose of this study was to validate patient's primary caregiver and their nurse's perception of patient discharge readiness assessment and their association with postdischarge medical consumption. Design The study employed a descriptive research, prospective longitudinal study design. Method The study was performed in a ward of a medical centre in Taipei, Taiwan, from June 2017–May 2018. Obtained data were analysed using an independent t test, one‐way ANOVA and logistic regression approach.