EN
The article aims to assess the adequacy of state aid provided to Polish enterprises during the COVID-19 pandemic. The research sample encompasses 21,687 non-financial enterprises classified as large, medium, and small, accounting for 32.7% of all non-financial enterprises in Poland falling into these groups. The article develops an original method for measuring the justification and accuracy of state aid directed to enterprises in response to the COVID-19 pandemic, utilising changes in firms’ sales revenues. The conducted analyses confirmed that the level of effectiveness of support policies varied significantly across economic sectors. In the first year of the pandemic, support policies were most effective in sectors P (education), Q (healthcare and social assistance), and I (accommodation and food service activities). In the second and third years of the pandemic, sectors Q and E (water supply; sewerage, waste management, and remediation activities) exhibited the highest effectiveness. The analyses also led to the conclusion that sectors with lower average firm size measured by sales revenues demonstrated higher effectiveness of support policies.