Aims Family intervention (FI) is recommended in national guidance to be offered to all service users accessing an early intervention in psychosis (EIP) team, due to the consistent evidence base in reducing relapse and rehospitalisation rates. However, FI implementation is poor nationally. Although barriers have been identified at the level of staff member and the organisation, there is a paucity of research identifying service user perspectives. Methods A qualitative questionnaire design was used to explore service user perspectives of behavioural family therapy (BFT) within a specialist EIP service in northwest England. Results Most participants contacted reported they lacked knowledge and understanding of BFT, with 54% reporting that this intervention had not been offered to them. This finding was unexpected and is inconsistent with the offer of BFT documentation in their clinical notes. Reasons for accepting BFT included to increase understanding of family members and for them to also be supported. Reasons for declining BFT included a preference for one‐to‐one interventions and not wanting family involved in their care. Conclusions National guidance on FI for psychosis is not reliably being translated to clinical practice, with many participants reporting that they were not offered this intervention. A key factor in accepting or declining an offer of BFT appeared to be whether participants wanted family members to be involved in their care. A lack of understanding of the BFT approach was evident, it is recommended that the offer of FI in psychosis is improved for service users to make an informed decision.