Several factors can force retirees to go to paid work. Catastrophic health-care expenditure (CHCE) is one of the driving forces for retirees to go to paid work. This cross-sectional study was based on 6,307 Iran retirees’ data. Xu method was used to calculate CHCE, and a logit model was estimated to show the association between CHCE and bridge employment. Other control variables were added to the model. The findings showed that there was positive relationship between CHCE and bridge employment. Retirement pension had negative relationship with work after retirement. Prevalence of work after retirement was higher in people who lived in rural region and increased due to increase in household size. The financial constraint was the main pushing factor for the retiree to go to paid work. Thus, covering retirees with health insurances and identifying and listing diseases that may face the retirees with CHCE are some possible efforts to decrease CHCE.