Background: Cognitive-communication disorders (CCDs) are common in the traumatic brain injury (TBI) population. Despite this, there has been limited research that explores the long-term impacts of reduced cognitive-communication functioning on daily life for this population. Aims: To identify the long-term impacts of cognitive-communication impairment as reported by adults with TBI and their significant others. Methods & Procedures: A qualitative descriptive approach grounded in phenomenology was used. Semi-structured, one-on-one interviews were conducted with adults with CCDs following TBI (n = 16) and their significant others (n = 12) to explore their lived experiences. Outcomes & Results: Reflexive thematic analysis revealed an overarching theme of 'The pervasive and unyielding impacts of cognitive-communication changes on daily life following TBI'. Within this overarching theme, three subthemes were identified: (1) self-awareness of communication changes; (2) fatigue; and (3) self-identity and life roles. Conclusion & Implications: The findings from this study highlight the long-term negative impacts of reduced cognitive-communication functioning on daily life. Health professionals supporting this population should consider ways to reduce the significant impact CCDs have on the lives of adults following TBI and their significant others. In addition, the findings highlight the importance of long-term rehabilitation services following TBI, with further research needed that explores how these services can be optimised.