Asylum-seekers experience high levels of traumatic events pre-, post- and during migration. Poly-traumatisation is associated with complex post-traumatic stress disorder (CPTSD), which has not yet been extensively explored in this population. CPTSD is a prevalent and highly disabling disorder in the present population requiring culturally sensitive diagnostic and treatment approaches. In this service evaluation, we evidence the high prevalence of CPTSD in an asylum-seeking sample and its association with greater distress compared with PTSD. We outline the treatment needs of asylum seekers with CPTSD.