This paper aims to find out how intense is the competition in Polish commercial banks loan market. Using Panzar – Rosse H-statistics and applying several estimation techniques (GLS, one-step GMM and two-step GMM) we find that this intensity is sensitive to the estimator applied. Upon analysis of results, one can conclude that competition evolves differently across years in Poland. In some years, competition was relatively high, as the H-statistics reached the level of 0.75, which is relatively close to perfect competition. In other years it gradually decreased reaching its bottom line in 2010, and took upward trend in 2011 and 2012. Generally, the values of our competitive environment measure indicate at monopolistic competition in Poland.