Abstract Background Worldwide percentages of people with mental health problems are substantial and increased during the COVID pandemic (to about 25 % in the general population). E-mental health has potential to help with waiting lists, rising health care costs and work pressure. To reach the desired effects, participants need to use the technology as intended. Non-usage though is a common problem. Research question is: what elements obstruct the intention to use e-mental Health interventions, plus what are barriers to bridging the intention-behaviour gap? Methods In a qualitative study, semi-structured interviews were conducted (interview guide). We recruited patients who were invited for an e-mental health intervention in a Dutch general practice but did not start the intervention. Data saturation occurred with 11 patients. Open, axial and selective coding was done on the transcribed interviews using the software ATLAS.ti. Results Five main themes were associated with non-use: 1) ‘Expectations about the eHealth in general’ were neutral to positive. 2) ‘thresholds to start e-mental health’ were: negative expectations about the content, lacking mental capacity due to mental problems, missing personal contact, the therapy with the mental health professional in general did not fit their needs or aversion towards more screen time. 3) ‘lack of planning’. 4) lacking encouragement from mental health professional 5) ‘Expectations from therapy in general’. (a.o. face-to-face contact and tailoring) Conclusions Embedding the e-mental health more into regular therapy has potential to overcome non-usage. The mental health care professional has social influence to increase usage, by a clear and convincing introduction plus joint review of the exercises during consultations. This study needs to be repeated in other clinical settings. Future research should also include age (computer use) and disease prognosis to define when e-mental health is a suitable solution for patients. Key messages • E-mental health interventions have potential to help with waiting lists, rising health care costs and workload, but non usage is a problem. • Embedding the e-mental health more into regular therapy has potential to overcome non-usage.