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Introduction Unplanned hospital readmission (UHR) following surgical procedures reflects patient outcomes. While adult readmission studies are abundant, limited research exists in paediatric populations, especially in the context of neurosurgery. Methods and analysis This protocol outlines a systematic review aimed at identifying reasons for unplanned readmissions (30-day and 90-day readmissions) and risk factors following paediatric neurosurgical procedures. Narrative synthesis, sensitivity analyses, subgroup analyses, and meta-analysis, when appropriate, will be done. Ethics and dissemination There are no primary data involved and no access to confidential patient information. The findings aim to contribute to refining clinical practice, enhance patient counselling, and optimise healthcare resource utilisation in paediatric neurosurgical care. PROSPERO registration number CRD42023455779.