--- title: "UK Online Safety Act Service Scope and Categorization" canonical_url: "https://www.sorena.io/artifacts/uk/online-safety-act/service-scope-and-categorization" source_url: "https://www.sorena.io/artifacts/uk/online-safety-act/service-scope-and-categorization" author: "Sorena AI" description: "Grounded service scope and categorisation guide for the UK Online Safety Act covering Part 3 logic, likely to be accessed by children, Category 1, 2A." published_at: "2026-02-21" updated_at: "2026-02-21" keywords: - "UK Online Safety Act category 1" - "category 2A" - "category 2B" - "Ofcom register categorised services" - "service scope online safety act" - "Online Safety Act categories" - "Category 1 service" - "Category 2A service" - "Category 2B service" --- **[SORENA](https://www.sorena.io/)** - AI-Powered GRC Platform [Home](https://www.sorena.io/) | [Solutions](https://www.sorena.io/solutions) | [Artifacts](https://www.sorena.io/artifacts) | [About Us](https://www.sorena.io/about-us) | [Contact](https://www.sorena.io/contact) | [Portal](https://app.sorena.io) --- # UK Online Safety Act Service Scope and Categorization Grounded service scope and categorisation guide for the UK Online Safety Act covering Part 3 logic, likely to be accessed by children, Category 1, 2A. *Scope Guide* *Categories and Duty Layers* ## Service Scope and Categorization Do not mix baseline duties with categorised service duties. The first question is whether the service is a regulated Part 3 service. The second is whether it later enters Category 1, 2A, or 2B. UK OSA work gets cleaner when you split it into layers. Layer one is basic Part 3 coverage for regulated user-to-user and search services. Layer two is whether the service is likely to be accessed by children. Layer three is whether the service becomes a categorised service with extra transparency, accountability, or user empowerment duties. ## Treat categorisation as an overlay, not the starting point The Act imposes base duties on in-scope services before category-specific duties arrive. Many teams lose time by jumping straight to Category 1 debates instead of finishing the base illegal-content and child-safety analysis. Keep the base duties live even if the service is not yet on an Ofcom register. - Complete baseline Part 3 scope analysis first - Track category signals separately in governance reporting - Avoid delaying core controls while waiting for category confirmation ## Use the live implementation sequence The government states that the threshold regulations for Category 1, 2A, and 2B were laid on 16 December 2024. Ofcom expected to publish the register of categorised services in summer 2025 and to consult on additional duties from early 2026. That means teams should plan for category exposure before formal listing if the service is near threshold or strategically likely to be included. - Track user scale, functionality, and other threshold related characteristics - Prepare for annual transparency reporting if category exposure is realistic - Pre-build terms, complaints, and internal metrics needed for extra duties ## Watch the categories that change operational design Category 1 services carry the most visible extra user empowerment and terms of service duties. Category 2A covers major search services and Category 2B covers other categorised user-to-user services. The right preparation is not only legal analysis. It is building reporting, metrics, user controls, and complaints data in a way that can scale into the category regime. - Category 1: terms enforcement consistency and adult user control tooling - Category 2A and 2B: transparency and accountability planning - All categories: clean metrics definitions before reporting is mandated *Recommended next step* *Placement: after the scope or definition section* ## Use Service Scope and Categorization as a cited research workflow Research Copilot can take Service Scope and Categorization from clarifying scope and applicability with cited answers to a reusable workflow inside Sorena. Teams working on Service Scope can keep owners, evidence, and next steps aligned without copying this guide into separate documents. - [Open Research Copilot for Service Scope and Categorization](/solutions/research-copilot.md): Start from Service Scope and Categorization and answer scope, timing, and interpretation questions with cited outputs. - [Talk through Service Scope](/contact.md): Review your current process, evidence gaps, and next steps for Service Scope and Categorization. ## Primary sources - [Online Safety Act 2023](https://www.legislation.gov.uk/ukpga/2023/50/contents?ref=sorena.io) - Primary legislation for scope, duties, risk assessment, enforcement, transparency, and complaints provisions. - [Online Safety Act explainer](https://www.gov.uk/government/publications/online-safety-act-explainer/online-safety-act-explainer?ref=sorena.io) - Current government implementation status, deadlines, and plain language explanation of the regime. - [Statement of Strategic Priorities for Online Safety](https://www.gov.uk/government/publications/statement-of-strategic-priorities-for-online-safety?ref=sorena.io) - July 2025 strategic priorities for Ofcom, including safety by design, age assurance, and small but risky services. ## Related Topic Guides - [UK Online Safety Act Age Assurance Options | Age Estimation, Verification, and Child Access Controls](/artifacts/uk/online-safety-act/age-assurance-options.md): Grounded age assurance guide for the UK Online Safety Act covering January 2025 pornography guidance, highly effective age assurance. - [UK Online Safety Act Applicability Test | Regulated Service, Exemptions, and UK Scope](/artifacts/uk/online-safety-act/applicability-test.md): Grounded UK Online Safety Act applicability test covering regulated user-to-user and search services, Schedule 1 exemptions, provider pornography scope. - [UK Online Safety Act Checklist | Scope, Risk, Child Safety, Moderation, and Evidence](/artifacts/uk/online-safety-act/checklist.md): Audit-ready UK Online Safety Act checklist covering service scope, illegal risk assessment, child access and child risk assessment, moderation, complaints. - [UK Online Safety Act Children Safety Duties | Child Access, Child Risk, and Age Assurance](/artifacts/uk/online-safety-act/children-safety-duties.md): Grounded guide to UK Online Safety Act children safety duties covering section 81 timing, children access assessments, children risk assessments. - [UK Online Safety Act Compliance Program | Governance, Controls, and Ofcom Readiness](/artifacts/uk/online-safety-act/compliance.md): Program design guide for UK Online Safety Act compliance covering governance, scope, assessments, moderation, age assurance, complaints, metrics. - [UK Online Safety Act Content Moderation and Appeals | Complaints, Terms Enforcement, and Redress](/artifacts/uk/online-safety-act/content-moderation-and-appeals.md): Grounded guide to UK Online Safety Act moderation and appeals requirements covering sections 21, 32, 71, and 72, complaints design, terms enforcement. - [UK Online Safety Act Deadlines and Compliance Calendar | 2023 to 2026 Milestones](/artifacts/uk/online-safety-act/deadlines-and-compliance-calendar.md): Grounded UK Online Safety Act calendar covering 26 October 2023 enactment, 31 January 2024 offences, 16 December 2024 illegal harms codes. - [UK Online Safety Act Enforcement and Penalties | Ofcom Notices, Penalties, and Escalation](/artifacts/uk/online-safety-act/enforcement-and-penalties.md): Grounded UK Online Safety Act enforcement guide covering Ofcom information notices, senior manager naming, confirmation decisions. - [UK Online Safety Act FAQ | Scope, Child Duties, Categories, and Ofcom Enforcement](/artifacts/uk/online-safety-act/faq.md): Practical FAQ on the UK Online Safety Act covering who is in scope, what changed in 2025, child access and risk assessments, age assurance, category duties. - [UK Online Safety Act Illegal Content Duties | Illegal Harms, Priority Offences, and Risk Assessments](/artifacts/uk/online-safety-act/illegal-content-duties-explained.md): Grounded guide to UK Online Safety Act illegal content duties covering user-to-user and search services, illegal content risk assessments. - [UK Online Safety Act Penalties and Fines | GBP 18 Million, 10 Percent Revenue, and Liability](/artifacts/uk/online-safety-act/penalties-and-fines.md): Grounded penalty guide for the UK Online Safety Act covering the GBP 18 million or 10 percent worldwide revenue cap. - [UK Online Safety Act Requirements | Sections, Deadlines, Controls, and Evidence](/artifacts/uk/online-safety-act/requirements.md): Detailed UK Online Safety Act requirements guide mapping scope, illegal content duties, child safety duties, terms enforcement, complaints, categorisation. - [UK Online Safety Act Risk Assessment Template | Illegal Content and Child Safety Template](/artifacts/uk/online-safety-act/online-safety-risk-assessment-template.md): Practical UK Online Safety Act risk assessment template covering service profile, harms inventory, controls, residual risk, child access, child safety. - [UK Online Safety Act Risk Assessments Playbook | How to Run Illegal and Children Risk Reviews](/artifacts/uk/online-safety-act/risk-assessments-playbook.md): Operational playbook for UK Online Safety Act risk assessments covering sequencing, ownership, evidence collection, control design. - [UK Online Safety Act vs EU Digital Services Act | Scope, Child Safety, and Enforcement Differences](/artifacts/uk/online-safety-act/online-safety-act-vs-dsa.md): Practical comparison of the UK Online Safety Act and the EU Digital Services Act covering regulated service models, illegal content frameworks. --- [Privacy Policy](https://www.sorena.io/privacy) | [Terms of Use](https://www.sorena.io/terms-of-use) | [DMCA](https://www.sorena.io/dmca) | [About Us](https://www.sorena.io/about-us) (c) 2026 Sorena AB (559573-7338). 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