PurposeThe COVID-19 pandemic has caused a decline in overall consumption, but luxury sales within offline department stores rose significantly. This study identifies changes in the market environment variable (i.e. pandemics) and their impact on clothing consumption behavior. Moreover, it examines consumer behavior characteristics and provides implications for future fashion marketing and merchandising strategies.Design/methodology/approachThis study analyzed post-pandemic consumption trends by obtaining luxury brand sales data from the Korea National Statistical Office and department stores. Moreover, it investigated luxury consumption fluctuation after the pandemic and statistically analyzed the characteristics of luxury consumers by customer level (CL) that affected sales.FindingsThe results of the study showed that offline (online) clothing consumption at mass markets has decreased (increased) since the pandemic, whereas sales of luxury fashion brands at offline department stores have grown. Moreover, the in-depth analysis showed a significant sales decline (increase) for clothing-centered (leather-centered) luxury brands.Practical implicationsIf such a trend in luxury brand consumption continues, current polarization is expected to be maintained. Therefore, the study’s findings can be used as basic data in strengthening luxury brands and planning products.Originality/valueThis is the first work to undertake a comparative study of fashion consumer behavior, before and after the pandemic, involving the mass and luxury markets in South Korea.