This article discusses the need for a comprehensive and efficient cost tool to measure the financial burden of food allergy on households. The current tool, the Food Allergy Economic Questionnaire (FA-EcoQ), has limitations such as its length and lack of questions on economic precarity. To address these limitations, the authors propose conducting a scoping review to evaluate and compare different questionnaires assessing the household financial costs of food allergy. The review will include studies that focus on the development, validation, reliability, or applicability of questionnaires specifically designed to measure the household cost of food allergy. The findings from this review will help inform the selection of a food allergy cost questionnaire and highlight gaps and limitations in existing cost measures.