The economic changes of recent years have had a significant impact on household consumer behavior. Following the changes caused by the COVID-19 epidemic, consumers had to face high inflation. These macro-level changes significantly impacted households and made budget planning difficult. This study aims to prepare and validate the methodology aimed at the composition and sustainability analysis of consumer baskets in different regions of Hungary. As a pilot study, the Reference Budget is determined based on focus group discussions with family types specified by the statistical office of the Western Hungary region, which represents the threshold value that households need for subsistence. Using the Hypothetical Household Tool (HhoT), this value compares the after-tax income for each type of household and analyses whether there is overspending in the examined cases. After that, based on the research participants’ answers, sustainability calculations are performed based on the consumer basket’s composition, thus validating that overspending is not sustainable.