Finding an efficient treatment for tinnitus attracts the interest of researchers worldwide. Cognitive behavioural therapy (CBT) is one of the widely researched methods used in tinnitus management. The aim of this study was to investigate what proportion of patients complete the full treatment and evaluate their characteristics. There were 266 patients invited to take part in this study. After the initial assessment session 181 of the participants were invited to take part in CBT sessions; 57 of those were discharged after the first session and 56 declined to take part in further sessions. Only 46 participants completed the full course of CBT. It is very interesting that there were no significant differences in initial assessment results between participants that were discharged after the first session and those who were offered to continue the therapy. This indicates that psychometric measures are not always enough to decide about further treatment. Another interesting issue that this study revealed was the fact that participants who declined attending further CBT sessions were older and did not have as severe insomnia as participants who decided to continue. As authors indicated it would be useful to investigate if younger tinnitus sufferers assign their insomnia to tinnitus. Additionally, it would be interesting to explore further why participants decide to stop treatment at some point. There is also a need to design a randomised controlled trial in order to evaluate how efficient CBT is. This is another reason why this study was important as obtained results may be helpful for future research on effectiveness of the CBT treatment.