This research brief provides an overview of the characteristics of households potentially at risk of double energy vulnerability. First, we ask what determines low-income households that are particularly affected by pricing CO₂ emissions. Based on this, we identify characteristics that are considered relevant for mapping households' vulnerability to rising carbon prices and look for suitable indicators that can quantify these categories. From the sum of identified characteristics, we identify vulnerable households and present preliminary results on how many households in Austria are potentially significantly affected by rising fuel and carbon prices.