Audit

ISO 27001 evidence checklist: control by control

14 September 2026 · 9 min read · CertAssist

The artefact each Annex A control needs, who produces it, and how big a sample the auditor is likely to ask for.

An ISO 27001 evidence checklist is the list of artefacts you hand an auditor to prove each control is operating, not merely written down. It has two halves. The first is the documented information ISO/IEC 27001:2022 names by clause, which is the same for every organisation. The second is the evidence for the Annex A controls your Statement of Applicability marks applicable, which is specific to you. ISO publishes no such list. This page sets it out, control by control, with the artefact, its owner and the sample auditors commonly ask to see.

Diagram showing the two halves of an ISO 27001 evidence checklist: the fixed documented information named by clauses 4 to 10, and the variable Annex A evidence covering the 93 controls split into 37 organisational, 8 people, 14 physical and 34 technological controls

What counts as evidence in an ISO 27001 audit?

Evidence in an ISO 27001 audit is a dated record that a control was actually applied, produced by the process that performs the control rather than written for the auditor. A policy saying access is reviewed quarterly is intent. The completed review, with the user list, the reviewer's name, the date and the tickets for accounts removed, is evidence. The auditor's test: could this artefact exist if nobody had done the work? If so, it is not evidence.

What documents does an ISO 27001 evidence checklist have to include?

ISO/IEC 27001:2022 names a fixed set of documented information across clauses 4 to 10, and an ISO 27001 evidence checklist has to include all of it whichever Annex A controls you applied. The standard names what must exist, not how to format it, so these can sit in twelve files or three, as long as each is controlled, dated and available at the audit.

ClauseDocumented information the auditor will ask for
4.3The scope of the ISMS, including what is excluded and why
5.2The information security policy, with an approval date and an owner
6.1.2The information security risk assessment process
6.1.3The risk treatment process and the Statement of Applicability
6.2Information security objectives and the plan to achieve them
7.2Evidence of competence for the people holding ISMS roles
8.2The results of the risk assessments you actually ran
8.3The results of risk treatment
9.1Monitoring and measurement results
9.2The internal audit programme and the internal audit reports
9.3The results of management review
10.2Records of nonconformities and the corrective action taken

Get the Statement of Applicability right first, because it is what the auditor reads to decide what else to ask for. Every applicable control becomes a line on your evidence checklist, and every exclusion needs a justification. If yours is not written, start with how to write a Statement of Applicability your auditor will accept.

What evidence does each Annex A control need, control by control?

Annex A of ISO/IEC 27001:2022 holds 93 controls in four themes: 37 organisational controls numbered 5.1 to 5.37, 8 people controls numbered 6.1 to 6.8, 14 physical controls numbered 7.1 to 7.14, and 34 technological controls numbered 8.1 to 8.34. You owe evidence only for the applicable ones. The table covers those auditors sample most often at a first certification audit.

Bar chart of the four ISO 27001:2022 Annex A themes showing 37 organisational controls numbered 5.1 to 5.37, 8 people controls numbered 6.1 to 6.8, 14 physical controls numbered 7.1 to 7.14 and 34 technological controls numbered 8.1 to 8.34, totalling 93 controls, with the dominant evidence type for each theme
Annex A controlEvidence the auditor asks forOwner
A.5.1 Policies for information securityApproved policy set, each policy carrying an owner, a version and an approval dateISMS owner
A.5.9 Inventory of information and other associated assetsAsset register export showing owner, classification and date of last reviewIT
A.5.15 Access controlAccess control policy plus the role to permission mapping actually in forceIT
A.5.18 Access rightsOne completed access review: user list, named reviewer, date, and tickets for accounts removedIT
A.5.19 to A.5.22 Supplier relationshipsVendor register, security clauses in a signed contract, latest review of a critical supplierISMS owner
A.5.24 to A.5.28 Incident managementIncident procedure, incident log, and one closed incident end to end with timestamps and lessonsSecurity lead
A.6.1 ScreeningBackground check records for recent hires, with consent recordedHR
A.6.3 Awareness, education and trainingCompletion report for the current cycle, listing every named employee and their dateHR
A.6.5 Responsibilities after terminationCompleted leaver checklist for a recent departure, with access removal timestampsHR and IT
A.8.2 Privileged access rightsCurrent privileged account list, the approval behind each, and evidence they are reviewedIT
A.8.8 Management of technical vulnerabilitiesScan report, the remediation tickets it produced, and your own fix timeframes per severityEngineering
A.8.13 Information backupBackup configuration, a successful job log, and a dated restore test with its resultIT
A.8.16 Monitoring activitiesAn alert that actually fired, who saw it, and what was done about itSecurity lead
A.8.24 Use of cryptographyEncryption settings at rest and in transit, key management rules, and who holds the keysEngineering
A.8.32 Change managementOne change end to end: request, test, approval and release, inside the audited periodEngineering

Notice how many rows name a person and a date rather than a document. Most first-time ISO 27001 findings are not missing controls. They are controls that cannot produce a dated record showing the control ran as claimed.

How many samples does an ISO 27001 auditor ask for, and how far back?

ISO/IEC 27001 prescribes no sample size and no retention period anywhere in the standard, so any checklist quoting a fixed number as an ISO requirement is wrong. The auditor sets the sample from your population size and the control's risk. The period is set by you: whatever interval your own policy states is what you are measured against. Writing "quarterly" in an access control policy then running two reviews a year is a nonconformity. Writing "twice yearly" and running two is not.

Table diagram of ISO 27001 evidence sampling showing typical sample sizes and lookback periods for access reviews, new starters, leavers, changes, incidents, backup restore tests, training completion, internal audits and management reviews, with a note that ISO 27001 itself prescribes no sample size
Evidence typeSample commonly requestedPeriod it must cover
Access reviewsOne completed review, sometimes twoYour own policy cycle
New startersTwo to five recent hiresSince the ISMS started operating
LeaversTwo to five recent departuresSince the ISMS started operating
ChangesThree to ten spread across the periodThe audited period
IncidentsThe full log, one walked end to endThe audited period
BackupsConfiguration plus at least one restore testYour own test interval
TrainingThe whole current cycle, not a sampleThe current training cycle
Internal auditThe full programme and every reportSince the last audit
Management reviewEvery review heldSince the last audit

Two rows catch small teams out. Training and management review are not sampled, they are checked in full, so one employee missing from the training report is visible immediately. Running your own ISO 27001 internal audit first is the cheapest way to find that.

What makes an ISO 27001 auditor reject evidence?

An ISO 27001 auditor rejects evidence for four recurring reasons, none about the control being weak. No date, or a date outside the audited period, makes an artefact unusable. Evidence produced for the audit rather than by the process, such as a screenshot taken that morning to stand in for a review that never ran, is rejected on sight. A mismatch with your own documents, where the policy says one thing and the record another, becomes a nonconformity. And an artefact with nobody attributable on it proves little: an access review with no named reviewer shows only that a list was exported. See also what auditors really look for in your evidence.

How should you organise ISO 27001 evidence before the audit?

Organise ISO 27001 evidence by control, not by system or team, because the auditor navigates by control and every minute spent hunting for an artefact is billed to you. Build the index from the Statement of Applicability so the two cannot drift apart, then record three things against each applicable control: the artefact, who owns producing it, and the date it was last produced. Fix that list before collecting anything, because deciding what counts once is cheaper than gathering the same screenshot twice. This is what CertAssist is built for: every Annex A control on one board with an evidence checklist per control, editable policy templates, and read-only auditor access. CertAssist does not connect to your systems and does not pull your data, so there is nothing to integrate and nothing to breach.

When is an ISO 27001 evidence checklist not enough?

An ISO 27001 evidence checklist will not carry you through certification on its own in three cases. If your controls are not actually running, the checklist just documents the gap faster. If your scope is complex, with multiple legal entities, regulated data or a large physical estate, you need a consultant to shape the scope and the risk assessment. And if you need continuous monitoring across hundreds of cloud accounts, an integrated platform will serve you better. That is a real trade-off: integrations buy automated collection and ongoing monitoring in exchange for granting a vendor standing access to your systems. A checklist earns its keep in the common case, a team of roughly 5 to 200 people certifying for the first time. Whatever you use, an accredited certification body still has to perform the audit and issue the certificate.

ISO 27001 evidence questions people actually ask

What is on an ISO 27001 audit evidence list?
An ISO 27001 audit evidence list has two parts. The first is the documented information named by clauses 4 to 10: the ISMS scope, the information security policy, the risk assessment and treatment processes, the Statement of Applicability, the objectives, and records of competence, monitoring, internal audit, management review and corrective action. The second is one artefact per Annex A control that your Statement of Applicability marks applicable.

What is an ISO 27001 controls evidence checklist?
An ISO 27001 controls evidence checklist maps each applicable Annex A control to the specific artefact that proves it operates, the person who produces that artefact, and the date it was last produced. It is built from your Statement of Applicability rather than from the full 93 controls, because you only owe evidence for the controls you declared applicable. Keeping the two aligned prevents the most common audit finding.

What is evidence of competence in ISO 27001?
Evidence of competence is what Clause 7.2 of ISO/IEC 27001:2022 requires you to retain for the people holding roles in your ISMS. In practice it is a qualification, a training certificate, a role description matched to a named person, or a documented record of relevant experience. It applies to your internal auditor and ISMS owner in particular, and a small team can satisfy it with a short competence record per role.

Who can perform an ISO 27001 audit?
Internal audits under Clause 9.2 can be performed by anyone competent and impartial, including your own staff or a contractor, provided they do not audit work they built themselves. The certification audit is different: only an accredited certification body can issue an ISO 27001 certificate, and accreditation is traceable through the International Accreditation Forum. Consultants and software vendors cannot certify you.

How long does an ISO 27001 audit take?
Certification is split into a Stage 1 documentation review and a Stage 2 audit of the controls in operation, usually a few weeks apart. Audit duration is set by the certification body from your headcount and scope complexity, not by ISO/IEC 27001 itself, so a small single-site organisation takes far less auditor time than a multi-entity one. Ask your certification body for the audit day calculation in the quote.

Related guides

ISO/IEC 27001 is maintained by ISO/IEC JTC 1/SC 27.

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