Abstract Background Healthcare services, also those provided by nurses, are challenged by the increasing care demands of an ageing population and people with chronic conditions. To improve care efficiency and quality, now and in the future, nurses must have competencies regarding self-management support of patients, electronic communication, preventive care, and engaging relatives in care. This study aimed to assess primary care registered nurses’ (RNs) time allocation to these competencies and their perceived needs for further development of these competencies. Methods A mixed methods design was used, involving a nationwide survey (n = 303) and focus groups (12 participants), both with RNs working in community care services or general practitioners (GPs) practices. Survey data were analysed descriptively, and focus group transcripts underwent qualitative thematic analysis. Results The majority of RNs invest significant time in client self-management support (90%), preventive care (82%), and involving relatives in care (74%). RNs also recognized an increasing demand for these competencies in the future and the need to motivate patients and relatives to self-manage their health. Furthermore, RNs reported that competencies regarding electronic communication skills will become extra important in the future, yet currently only 37% dedicate substantial time to this. RNs face challenges in effectively utilizing electronic communication with patients and thus need opportunities to improve digital skills. Additionally, RNs desire enhanced collaboration with other healthcare professionals, such as GPs and medical specialists. Conclusions RNs’ limited time allocation and perceived inadequacy in electronic patient communication, underscore the importance of targeted training in this area, and prioritizing this by healthcare organizations. In addition, fostering collaboration between nursing staff and other healthcare professionals could support future proof nursing in primary care. Key messages • Nurses demonstrate resilience in addressing healthcare challenges, emphasizing client care, prevention and family engagement. • Training nurses in competencies for electronic communication with patients is essential to meet the anticipated increase in demand for this aspect in their practice.