Abstract
The paper presents the practical application of the provision of Art. 91.2a of the Public Procurement Act of 29 January 2004 when awarding public supply and service contracts. The author has noted frequent irregularities in the application by the contracting authorities of the price as the sole tender evaluation criterion. Examples of costs that may be incurred in connection with public contract awards have been given. Practical methods for taking into account the costs incurred e.g. in connection with purchasing electrical equipment or fuel have also been indicated.