Cognitive behavioural therapy (CBT) is an effective treatment for generalized anxiety disorder, but there is still room for improvement. The aim of the present study was to examine the potential benefit of enriching CBT with kundalini yoga (Y‐CBT). Participants consisted of treatment resistant clients at a community mental health clinic. A total of 32 participants enrolled in the study and 22 completed the programme. After the Y‐CBT intervention, pre‐post comparisons showed statistically significant improvements in state and trait anxiety, depression, panic, sleep and quality of life. Results from this preliminary study suggest that Y‐CBT may have potential as a promising treatment for those suffering from generalized anxiety disorder. Copyright © 2014 John Wiley & Sons, Ltd. Key Practitioner Messages Yoga‐enhanced cognitive behavioural therapy (Y‐CBT) may be a promising new treatment for those suffering from generalized anxiety disorder. Y‐CBT may also reduce depression in those suffering from generalized anxiety. Y‐CBT may reduce depression and anxiety in a clinic population where clients suffer from multiple diagnoses including generalized anxiety disorder.