Integral economic loss of the society, connected with mental disease, were calculated by the author and presented. The author determined "direct" and "connected" state costs for psychiatric patients, and the volume of non produced national income (indirect costs) because psychiatric patients with temporal or constant disability are excluded from producing process. Financial state of psychiatric hospitals in Moscow was analysed and reserves for improvement of money spending were found out. Calculations of expenses of admission of patients with different diseases to Psychiatric Hospital N 1 by P.P. Kashenko in 1988 were performed. Principles of financing of psychiatric hospitals on the basis of clinical-statistic groups are discussed. The method of determination of prices for medical and diagnostic services to patients is presented.