Web-based portals enable patients to access their electronic health records, including test results and clinical documents, from anywhere with Internet access. Some portals also serve as a means of two-way communication between patients and healthcare professionals and provide a platform for the recording of patient-entered data such as home blood pressure readings. Such systems are designed to encourage patient participation in the management of their condition, and ultimately to increase patient empowerment and self-management, which are associated with improved clinical outcomes. As an example of portal use in patients with renal conditions, we discuss the PatientView portal, which is offered free of cost to patients under the care of renal physicians in the UK. We present an account of its various features and briefly describe the user experience. Previous studies examining the impact of this portal on patient care have been very positive; it appears to be popular among users and overall levels of satisfaction with the service are high. As the use of patient portals increases, we discuss barriers to the more widespread use of portals. We offer suggestions on how the care of patients with renal conditions can be enhanced in the future by further developing the existing features, learning from experiences of other patient portals and providing better integration of portal use into the current model of care.