Abstract Background In the Pomorskie Voivodeship (Poland), there are statistically 1,379 out-of-hospital cardiac arrest cases. Not all affected people receive help. Despite the continued installation of AEDs in public spaces, the public is reluctant to use them. Sudden cardiac arrest has a high mortality rate. Methods The following aims were assumed in the study: Estimation of the level of risk of cardiac arrest in outpatient conditions among the population of the Pomorskie Voivodeship according to national and global data, CBA and CUA for three options - current, zero and 100% AED use. During the research, an original questionnaire was used. The answers were collected during direct interviews with the respondents and by making the form available via the Internet. 20,971 responses were included in the analysis. Data collected in registers and inventories of major public administration offices (ie 123 municipalities) regarding the location of devices in public space were used to assess the degree of AED prevalence. Cost data was taken from information databases and directly from medical entities. The economic analysis was based on the use of the CBA and CUA pharmacoeconomic analysis. Results Pharmacoeconomic analysis showed a level of investment unprofitability. There is a significant difference between the profitability results made for the levels of current, zero and 100% AED use. Statistical analysis showed relationships between gender, place of residence, education level and knowledge about AED among the inhabitants of the Pomeranian Voivodeship. Conclusions The low level of AED equipment operation and the unsatisfactory level of knowledge among the inhabitants of the Pomeranian Voivodeship contribute to a very low level of investment profitability. Key messages Education is the key to optimizing public spending. The level of profitability of public investment depends on various social factors.