Abstract Background Based on the annual Country Health Profiles, we can see the difference in population behaviour across EU countries and the associated health risks. At first glance, the so-called post-communist countries are characterised by above-average per-capita harmful consumption of sin goods, alcohol and tobacco. Is this harmful consumption associated with increased healthcare costs? Methods The idea of the study is based on balanced panel-data published in Country Health Profiles. The member countries were divided into groups based on their health risk scores - high risk (above average), and low risk (below average). The group of countries with high risk is mostly composed of post-communist countries. The detailed per-capita annual data for the period 2013-2021 was collected, such as GDP, consumption of sin goods, alcohol, and tobacco. The analysis is based on fixed-effects linear regression models, following recent recommendations on suppressing the excessive role of statistical-inference tools. Results We built various models for different groups of countries, and in this abstract, we present results for the group of post-communist countries - a simple model of harmful consumption (sin goods, GDP) and a more complex model (alcohol, tobacco, GDP). The results show that in the case of the post-communist countries group, for a fixed level of GDP per capita, higher consumption of sin goods by EUR 1 per capita corresponds with total healthcare expenditures higher by EUR 0.244 per capita. For a fixed level of GDP per capita and tobacco consumption per capita, higher consumption of alcohol by EUR 1 per capita corresponds with total healthcare expenditures higher by EUR 1.367 per capita. Conclusions Harmful consumption has a multiplier effect in the health sector; besides direct impact, it influences an increase in healthcare expenditures. More emphasis should be placed on prevention and awareness of consumers to reduce harmful consumption. Key messages • For fixed GDP per capita, higher harmful consumption corresponds with higher healthcare costs in post-communist countries. • For fixed GDP per capita and tobacco consumption per capita, a €1 higher alcohol consumption corresponds with more than €1 higher healthcare expenditure in the post-communist countries.