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An increasingly important component of invasive species management involves the formal assessment of risks associated with particular species becoming invasive and causing impact. We evaluated recent developments in risk assessment (RA) for alien species, with special emphasis on species‐based pre‐border assessments for intentional introductions. Our aim was to identify important advances and key challenges.

Global.

A literature review was done to determine which approaches have been developed and fine‐tuned over the last two decades, which of these have worked best and which are most widely used. We identified priorities for improving our ability to assess risks.

The review is divided into sections on various types and foci of RAs: invasion stage, taxon, ecosystem, assessment method and impact type. RAs for plants are the most advanced, with the Australian …