The article is about the important and widely discussed issue of the financial evaluation of the effciency of coaching, mentoring and trainings. Me authors question how human development projects should be treated in accounting: more as operational costs or long term investments. Mey explain when projects are pro&table and how to measure the profitability of such projects. Me article presents the main assump-tions and methods of the financial evaluation of coaching, mentoring and training eficiency. Me authors present the Kirkpatrick ’s Model and Philips’ Model. Finally the authors present the results of an evaluation study that they conducted in Polish conditions using the mentioned methods.