Purpose | Guide the ISMS owner through building and maintaining a Statement of Applicability (SoA) that will hold up under audit. |
Applies to | ISO/IEC 27001:2022 Annex A controls (93 controls, 4 themes). |
Audience | ISMS Manager / Information Security Lead, and anyone preparing or updating the SoA. |
Owner | ISMS Manager / Information Security Lead |
Approved by | Chief Executive Officer (CEO), or designated Management Representative |
Review cycle | Annually, or upon significant change to scope, infrastructure, premises, or risk profile |
1. Purpose
This SOP describes how to build and maintain a Statement of Applicability (SoA) for an ISO/IEC 27001:2022 Information Security Management System (ISMS). It sets out the step-by-step process for working through the Annex A control set, deciding applicability, writing justifications, and assigning implementation status — and gives concrete rules for two scenarios that come up often when scoping a smaller or service-only organization.
2. What the SoA Is (Brief Overview)
The Statement of Applicability is a mandatory ISMS document (ISO/IEC 27001:2022, Clause 6.1.3d). For every control in Annex A, it records:
Whether the control is applicable to the organization's ISMS (Y/N);
The justification for including or excluding it;
The organization's documentation/evidence that implements it; and
Its current implementation status.
Annex A groups all 93 controls into four themes:
Theme | Covers | Reference range | Count |
Annex A 5 | Organizational controls | 5.1 – 5.37 | 37 controls |
Annex A 6 | People controls | 6.1 – 6.8 | 8 controls |
Annex A 7 | Physical controls | 7.1 – 7.14 | 14 controls |
Annex A 8 | Technological controls | 8.1 – 8.34 | 34 controls |
Each row of the SoA typically captures the following columns:
Column | What it captures |
Ref | The Annex A clause number (e.g. 5.1, 7.3, 8.20). |
Annex A Control | The control title as written in ISO/IEC 27001:2022 Annex A. |
Applicable (Y/N) | Whether the control applies to this organization's ISMS scope. |
Justification for Inclusion / Exclusion | The specific, auditable reason the control is included or excluded — tied to the organization's actual scope, assets, and activities. |
Related Documentation / Evidence | The policy, procedure, or record that implements the control (or governs the vendor that does). |
Implementation Status | Implemented, Partially implemented, or Not applicable — see legend below. |
Implementation status is recorded against a fixed legend:
Status | Meaning |
Implemented | Control is fully in place and operating, supported by a documented policy/procedure and evidence. |
Partially implemented | Control is partly in place; further work, rollout, or formal documentation is planned and tracked. |
Not applicable | Control is excluded from the ISMS scope; a specific justification is recorded in the Justification column. |
3. Step-by-Step Procedure
Confirm the ISMS scope statement first. The SoA must align to it — know the organization's legal boundaries, locations, people, services, and any technology/infrastructure it owns or operates before marking anything applicable or not.
Work through Annex A control by control, theme by theme (Organizational → People → Physical → Technological). Do not skip controls — every one of the 93 needs an explicit Y/N decision.
Decide applicability (Y/N) for each control using the decision rule in Section 4.
Write a specific justification for each decision. Tie it to the organization's actual scope, assets, and activities — generic text such as “N/A” or “not needed” will not withstand audit scrutiny.
Map related documentation/evidence — the policy, procedure, or record that implements the control (or that governs oversight of a vendor delivering it).
Assign an implementation status (Implemented / Partially implemented / Not applicable) consistent with the Y/N decision.
Route the completed SoA for review and approval by the document owner (e.g. CEO or ISMS Manager) before it is used as an audit record.
Set the review cadence: at minimum annually, and immediately after any significant change to scope, premises, infrastructure, risk profile, or organizational structure.
4. Applicability Decision Rules
4.1 General rule
The default posture is that a control applies. Exclusion is the exception, not the norm, and must be defensible at audit. Use this test for every control:
Does the activity, asset, or environment the control governs genuinely not exist in the organization, and is it not planned? → Mark Not Applicable (N), with a specific reason.
Does the activity/asset exist but is delivered or hosted by a third party (e.g. a cloud provider)? → The control is still Applicable (Y). Record that it is inherited from the vendor, and rely on the supplier-management controls (5.19–5.22) to provide oversight — do not mark it N just because a vendor performs it.
4.2 Scenario A — No physical office / physical security out of scope
Applies to fully remote organizations with no company-owned or leased premises. In this case, mark the premises-specific controls under Annex A 7 (Physical controls) as Not Applicable, with a justification along the lines of:
“The organization has no physical premises; staff operate remotely from locations not owned, leased, or managed by the organization. Physical security perimeter, entry, and monitoring controls are therefore not applicable to the ISMS scope.” |
This does not mean every Physical control can be blanket-excluded — several still apply through the remote working / asset management policies even without an office:
Ref | Control | Typical treatment* | Why |
7.1 | Physical security perimeters | Typically N | No owned/leased premises to define a perimeter for. |
7.2 | Physical entry | Typically N | No office entry points to control. |
7.3 | Securing offices, rooms and facilities | Typically N | No offices, rooms, or facilities exist. |
7.4 | Physical security monitoring | Typically N | No premises to monitor (CCTV, alarms, etc.). |
7.5 | Protecting against physical & environmental threats | Often still Y | May still apply to home/remote workspaces, or be inherited from a cloud/coworking provider. |
7.6 | Working in secure areas | Typically N | No designated secure areas exist. |
7.7 | Clear desk and clear screen | Often still Y | Applies to remote/home workspaces via the remote working policy, even with no office. |
7.8 | Equipment siting and protection | Typically N | No company-sited equipment to protect. |
7.9 | Security of assets off-premises | Often still Y | Applies whenever staff use laptops/devices remotely. |
7.10 | Storage media | Often still Y | Applies if any physical or removable media is used or issued to staff. |
7.11 | Supporting utilities | Typically N | No premises with power/cooling/utilities to protect. |
7.12 | Cabling security | Typically N | No office cabling to secure. |
7.13 | Equipment maintenance | Often still Y | Applies if the organization issues and maintains any equipment (laptops, phones). |
7.14 | Secure disposal or re-use of equipment | Often still Y | Applies whenever company-owned equipment is retired or reassigned. |
* Confirm each “typical” treatment against the organization's actual facts (e.g. a coworking membership, storage of physical files, or company-issued hardware can bring a control back into scope).
4.3 Scenario B — No infrastructure / service-only organization
Applies to organizations that do not own, build, or operate any IT infrastructure, network, or production systems — e.g. a services/consulting business that runs entirely on third-party SaaS tools and does no software development. In this case, mark the infrastructure- and network-specific controls under Annex A 8 (Technological controls) as Not Applicable, with a justification along the lines of:
“The organization does not own, operate, or host any IT infrastructure, network, or production systems, and does not develop software. Infrastructure- and development-related controls are therefore not applicable to the ISMS scope.” |
Ref | Control | Why it is typically Not Applicable |
8.6 | Capacity management | No owned infrastructure/systems whose capacity needs monitoring. |
8.9 | Configuration management | No systems or servers to configure or harden. |
8.14 | Redundancy of information processing facilities | No processing facilities exist to make redundant. |
8.16 | Monitoring activities | No systems/network to monitor for anomalous behaviour. |
8.17 | Clock synchronization | No systems generating logs that need synchronized clocks. |
8.18 | Use of privileged utility programs | No systems with utility programs to restrict. |
8.19 | Installation of software on operational systems | No operational systems onto which software is installed. |
8.20 | Networks security | No organization-operated network to secure. |
8.21 | Security of network services | No network services are provided or operated. |
8.22 | Segregation of networks | No network environment to segregate. |
8.27 | Secure system architecture and engineering principles | No systems are architected or engineered by the organization. |
8.28 | Secure coding | No software is developed in-house. |
8.29 | Security testing in development and acceptance | No development activity to test. |
8.31 | Separation of development, test and production environments | No such environments exist. |
8.34 | Protection of information systems during audit testing | No information systems exist to protect during audit/testing. |
Endpoint, identity, and data-handling controls almost always remain applicable even in this scenario, because staff still use devices and handle business data:
Ref | Control | Why it usually stays Applicable |
8.1 | User endpoint devices | Staff still use laptops/phones to deliver the service. |
8.2 / 8.3 | Privileged access rights / Information access restriction | Staff still hold accounts and access to SaaS tools and business data. |
8.5 | Secure authentication | Login/MFA to email, SaaS, and business systems still applies. |
8.7 / 8.8 | Malware protection / Vulnerability management | Endpoint devices still need protecting and patching. |
8.10 – 8.13 | Information deletion, data masking, DLP, backup | Business data still exists and is still processed, stored, and needs protecting. |
8.24 | Use of cryptography | Data in transit/at rest on endpoints and SaaS tools still needs encrypting. |
8.32 | Change management | Still applies to any change affecting information or access, even without owned infrastructure. |
5. Common Pitfalls
Excluding a control without a specific, auditable reason — “not needed” or “N/A” alone will not pass the audit.
Treating a vendor-delivered control as Not Applicable instead of Applicable-with-inherited-implementation (governed via supplier oversight controls).
Blanket-excluding an entire Annex A theme (e.g. all of Annex A 7 or all of Annex A 8) instead of assessing each control on its own facts.
Leaving the SoA out of sync with the ISMS scope statement and risk assessment — all three must tell the same story.
Forgetting to re-review the SoA when the organization opens/closes an office, adopts or drops infrastructure, or changes its service model.
6. Review, Approval and Maintenance
The SoA is a controlled ISMS record. It must be reviewed and formally approved by the document owner (typically the CEO or ISMS Manager) before being relied on as an audit record, and re-reviewed at least annually or whenever scope, infrastructure, premises, or risk materially change. Version history and approval dates should be tracked in the document header, consistent with the organization's document control procedure.
