As regards the selection of the tasks of the municipality sector, the local authorities have freedom both according to the former and the current legislation. The advantages of performing tasks through companies owned by the municipality include the flexible adaptation to market conditions and integration into the relation network of the economy. Some research works have proved, however, that their operation is rather risky. In the frames of the research I reviewed the reports of companies and compared the indices formed, evaluating primarily the profitability, indebtedness, asset structure and solvency. In regard to the liabilities of the examined companies, the dominance of short-term liabilities, increasing receivables and the profitable management were clear phenomena in most cases within the sample.