The scope of research into long-term outcomes of psychogenic nonepileptic seizures (PNES) has broadened in recent years, to take into account of social, economic, psychiatric, and other outcome measures. The quantity of long-term outcome information remains limited, to a great extent because of practical difficulties in obtaining good long-term outcome information in this patient group. Because of differing methodology and other factors, the available studies are difficult to compare directly. Nonetheless, they agree that most patients continue to report seizures long term. Healthcare use outcome appears better, with many patients not accessing medical care for seizures. However, many patients have poor psychiatric and economic outcomes. The reasons for this are poorly understood, but may relate more to underlying psychological processes than to the seizures themselves. A better understanding of the psychological underpinnings of PNES will allow more informative study of outcome and thus of the impact of interventions. However, obtaining good outcome information in PNES patients remains a major challenge and may be difficult in some medical systems.