Sustainable assessment has been proposed as an idea that focused on the contribution of assessment to learning beyond the timescale of a given course. It was identified as an assessment that meets the needs of the present in terms of the demands of formative and summative assessment, but which also prepares students to meet their own future learning needs. This paper reviews the value of such a notion for assessment; how it has been taken up over the past 15 years in higher education and why it might still be needed. It identifies how it has been a successful intervention in assessment discourse. It explores what more is needed to locate assessment as an intervention to focus on learning for the longer term. It shows how sustainable assessment can help bridge the gap between assessment and learning, and link to ideas such as self-regulation, students' making judgements about their own work and course-wide assessment.