A survey was conducted to assess psychiatrists' knowledge and attitudes regarding the costs of various psychiatric treatments. Psychiatrists (n = 500) were randomly selected from the membership of the Ohio Psychiatric Association. The survey explored several aspects of psychiatrists' knowledge of costs, including estimated prices of 24 specific psychiatric treatments (frequently used psychotropic medications, laboratory tests, and inpatient and outpatient procedures) as well as their level of confidence in their estimates. The survey also asked a series of attitude/opinion questions and specific demographic data. The psychiatrists (n = 265, 59% response) perceived that knowing the costs of treatments was an important consideration when choosing a particular treatment. Psychiatrists' actual knowledge of the costs of treatment was inconsistent with their beliefs of the importance of knowing the costs as well as their reported confidence in their knowledge of costs. Information about the costs of psychiatric treatments is an important clinical consideration and a program to improve clinicians' knowledge of the costs of psychiatric treatment could occur during residency training.