Abstract
The article analyses the effectiveness of selected insolvency prediction models. Studies have been based on the 2006-2013 financial data from micro, small, medium and large enterprises. The effectiveness of such models as those of T. Maślanko, A. Hołda, B. Prusak, D. Hadasik, J. Gajdka and D. Stos, as well as the Poznań model, was analysed separately for groups of undertakings of different sizes (micro, small, medium and large). Moreover, the studies were based on the financial data of undertakings with bad and good financial condition. The final results and conclusions are a resultant of the usefulness of the analysed models in so distinguished groups of undertakings. The results of the studies allow for recommending certain models to be used in practice, including also tender procedures referred to in the Public Procurement Act.