ISO 27001

The Statement of Applicability, row by row

Ask a certification auditor which document they read before any other and most will name the Statement of Applicability (SoA). It is where your risk work turns into a list of controls, and where every Annex A control you left out has to explain itself. Built well, it is short, honest and easy to test. Built badly, it is the first place an audit goes wrong.

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01 · Why it matters

One document that joins risk to controls

The SoA is the bridge between what you feared and what you run.

Clause 6.1.3 of ISO/IEC 27001:2022 asks you to treat the risks you assessed, and to compare the controls you chose against Annex A so nothing necessary is missed. The SoA is the record of that comparison. It covers all 93 Annex A controls and any extra controls you added from elsewhere.

The certification auditor
Uses it to plan sampling: every included control is something they may ask to see working.
Your customers
Some ask for it in vendor reviews to check that the controls they care about are in scope.
Your internal auditor
Uses it as the checklist for the year's internal audit programme.
You
It is the one page that shows what the ISMS promises, so it is where drift shows first.

02 · What it must hold

The four things every row records

Decision, reason, status, and a reason for each exclusion.

ElementWhat it recordsWhat the auditor checks
The controlEach Annex A control by number and name, plus any controls you addedThat all 93 appear, with none silently dropped
Included or excludedA plain yes or no for each controlThat the decision matches the risk treatment plan
WhyFor inclusions, the risk, law or contract behind it; for exclusions, the reason it is not neededThat the reason fits your scope and risks
Implementation statusWhether the included control is in place, partly in place, or plannedThat implemented controls have evidence behind them

The standard sets what the SoA must contain, not its format. A spreadsheet is the common choice because it filters well and sits beside the risk register. Treat it as documented information: version it, approve it, and keep the history.

03 · Deciding inclusion

Let the risk treatment decide, then check against Annex A

Inclusion is an output of risk work, not a guess made control by control.

  1. Finish the risk assessment and agree a treatment for each risk above your acceptance level.
  2. For each risk you chose to treat, list the controls that will reduce it. Those controls are included, with the risk ID as the reason.
  3. Add controls that a law, regulation or contract requires even where the risk score alone would not.
  4. Walk all 93 Annex A controls. For any you have not included, ask whether a risk was missed. If one was, go back to the register.
  5. What is left is your exclusion list. Each one now needs a reason that would survive a question.
  1. Risk treatmentThe strongest reason: the control reduces a named risk in the register.
  2. Legal or regulatoryA law or regulator expects it, such as a log or reporting duty in India.
  3. ContractualA customer agreement requires it, such as encryption or a breach notice period.
  4. Business choiceLeadership wants it as good practice. Acceptable, but say so plainly.

04 · Exclusions

Wording an exclusion so it holds

A good exclusion names a fact about your scope. A weak one names a preference.

Auditors do not object to exclusions. They object to exclusions that collapse after one question. The table is illustrative: the left column shows reasons tied to facts the auditor can check; the right column shows the question that exposes a weak reason.

ControlWording that usually holdsThe question that sinks a weak one
8.28 Secure codingWe write no software in scope. All systems are bought as configured SaaS; supplier controls cover the vendor's code.Then who maintains the scripts and integrations in your repository?
7.5 Protecting against physical and environmental threatsExcluded for owned premises: the scope holds no server rooms; cloud providers carry this, assessed under 5.23.Your office stores backup drives. Where are they kept?
8.30 Outsourced developmentNo development is outsourced. Contractors work under our own SDLC and are treated as staff.Your website was built by an agency last year. Is it in scope?
7.10 Storage mediaNo removable media is issued; USB storage is blocked by endpoint policy.Is the block enforced on every laptop, or only written in the policy?
5.16 Identity managementDo not exclude it with "not relevant". Almost every scope needs it.Who creates and removes user accounts, then?

Write the reason as a sentence about your organisation, not about the control. "Not applicable" on its own is not a reason.

05 · Starter template

A starter row layout

Six columns are enough. Illustrative rows below.

ControlApplies?ReasonLink to risk or sourceStatusOwner and evidence
5.23 Information security for use of cloud servicesYesAll production runs on one public cloudR-07, R-11ImplementedHead of platform; cloud review record
8.13 Information backupYesLoss of customer data would stop serviceR-03; customer contract clauseImplementedSRE lead; quarterly restore test
5.7 Threat intelligenceYesNew control; feeds vulnerability workR-14Partly implementedSecurity lead; monthly intel note
7.10 Storage mediaNoNo removable media issued; USB blockedNot applicableNot applicableIT lead; endpoint policy export

Owner and evidence column

The standard does not ask for it. Add it anyway: it turns the SoA into an audit plan and stops a control from being included with nobody running it.

06 · Keeping it alive

Keep the SoA in step with what you run

It changes whenever the risks, scope or controls change.

  • New risk or changed score. Re-check the controls tied to it, and the SoA rows they sit on.
  • Scope change. A new product, site or cloud account can turn an exclusion into an inclusion.
  • Status moves. A planned control that goes live moves to implemented, with evidence.
  • Before each audit. Read every exclusion again as if you were the auditor.
  • Management review. Report what changed in the SoA since the last review.
  • Copying a template's decisions. Inclusions that match no risk in your register are the first thing an auditor notices.
  • Everything included. Including all 93 looks safe but commits you to evidence for each one.
  • Status that is not true. Marking a control implemented before it runs turns a gap into a nonconformity.
  • No version history. If you cannot show what changed and who approved it, the document is uncontrolled.
  • Drift from the risk treatment plan. Two documents that name different controls for the same risk will be raised.

Sources: ISO/IEC 27001:2022, clause 6.1.3 and the Annex A control titles, described in our own words; Annex A control numbers follow the 2022 edition. The example rows are illustrative and describe no real organisation.

Questions about the SoA

Can we exclude a whole Annex A theme?

Rarely, and only with a reason for each control.

Each control is decided on its own. A fully remote company might exclude several physical controls, but it still has laptops, homes and perhaps a registered office, so some physical controls usually stay in.

Do we need to share the SoA with customers?

Not by rule; many choose to share it under NDA.

The standard does not require you to publish it. Customers often ask for it in vendor reviews. Sharing a version under a non-disclosure agreement is common practice.

Is the SoA printed on the certificate?

The certificate usually refers to the SoA version.

Certification bodies commonly cite the SoA version on the certificate alongside the scope, so a new version may need to be shared with them. Ask your body how it handles updates.

Who should approve it?

Someone with authority over the ISMS, usually leadership.

The approver should be able to accept the residual risk behind each exclusion. That is normally the ISMS owner or top management, recorded with a date and version.

Get an SoA that survives the first question.

An ISO 27001 gap analysis drafts the Statement of Applicability with your owners, from your own risk register.