Despite its proven effectiveness in preventing several diseases, including COVID-19, the distribution of hand-washing systems was not at the forefront of the health measures put in place in Cameroon. At the time of COVID-19, the acquisition of handwashing devices at home was the responsibility of households because they were not part of the equipment distributed free of charge such as masks or hydroalcoholic gel. As a result, the acquisition of handwashing facilities required enormous financial resources for households whose incomes were already declining due to the adverse effects of the crisis. The objective of this study was to assess the impact of the adoption the handwashing device on household health expenditures in Cameroon during periods of severe restrictions related to COVID-19.