Inspection Data Summary Report (IDSR) 2025
The IDSR provides a concise summary and analysis of school data to aid inspectors in preparation for Ofsted inspections. Inspectors use the IDSR alongside other tools to triangulate the data and gain a full understanding of the evidence to gain a comprehensive insight.
Leaders are encouraged to be familiar with their school's IDSR and use it proactively to inform self-evaluation and improvement planning.
Important: The IDSR contains sensitive information and must be stored securely in compliance with data protection regulations (GDPR and Data Protection Act 2018).
Overview of Key Changes
- Initial release on 4 November 2025, with multiple updates scheduled throughout the academic year - typically in December, February and May, but additional updates may occur as new data becomes available.
- Presented as a standard web view, with the option to save or print (document length ranges from 60 to 182 pages).
- New Methodology: Enhanced interpretation and statistical analysis using standard deviations (SD), confidence intervals (CI), and statistical significance, alongside multi-year averages, trends and gap trend analysis for disadvantaged pupils.
- Minimum threshold for data suppression changed to 5 or fewer pupils.
- Expanded Multi-Academy Trust (MAT) Information.
- Expanded Contextual data section including local area deprivation banding and Children in Need (CIN) percentages.
- Additional Alternative provision (AP) placement details.
- Key Stage 2 English Grammar, Punctuation and Spelling (EGPS) and Early Years Foundation Stage (EYFS) national data now included in the Achievement section.
- Expanded the range of qualifications such as T levels, included in the Key stage 4 and 16-18 Achievement sections.
- New Feature: Introduction of a Report Card section summarising key contextual and performance measures to be included in Inspection reports. Plus, a Pupil Movement section for secondary phase only.
Access is through Ofsted IDSR log-in or DfE's Analyse School Performance (ASP) using a DfE Sign-in account
OFSTED is hosting a webinar for school leaders: Sign up to the IDSR webinar on 3 December.
You may also be interested in the guidance accompanying the IDSR and the latest OFSTED blog Our renewed inspection framework: what we've learned from pilots - Ofsted: education
