Side-by-sideGlobalISO/IEC 27005

ISO/IEC 27005 ISO/IEC 27005 vs NIST SP 800-30

This comparison page helps choose the right risk-management approach by scope, evidence, approval, and review requirements.

Applied to this decision area, this page focuses on scope, ownership, evidence, review triggers, and escalation criteria supported by source-linked risk-management guidance.

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Author

Sorena AI

Published

May 9, 2026

Updated

May 9, 2026

Sections

Structured answer sets in this page tree.

Primary sources

Cited legal and guidance references.

Publication metadata

Sorena AI

Published May 9, 2026

Updated May 9, 2026

Overview

The comparison explains which method fits your risk context, what evidence to keep, and how to make review and ownership explicit for ISO/IEC 27005 risk work.

ISO/IEC 27005 vs NIST SP 800-30 side-by-side comparison

ISO/IEC 27005 vs NIST SP 800-30: scope, duties, evidence, and decision rule

This comparison identifies when ISO/IEC 27005 is the right operating model, when NIST SP 800-30 controls the analysis, and how to reuse evidence without mixing sources.

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First framework

ISO/IEC 27005

Use ISO/IEC 27005 when you need the primary management-system frame for information security risk work: scope, owners, evidence, review, and improvement all sit in one operating model.

Second framework

NIST SP 800-30

Use NIST SP 800-30 when you need a detailed risk-assessment method: identify threats, vulnerabilities, likelihood, and impact, then document the result in a repeatable assessment record.

ISO/IEC 27005 vs NIST SP 800-30: scope, duties, evidence, and decision rule
Dimension	ISO/IEC 27005	NIST SP 800-30	Operational implication
Scope and covered activity	ISO/IEC 27005 is guidance for managing information security risks in an ISMS context, so it is the better anchor when the decision is about the full risk-management process. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 is guidance for conducting risk assessments, so it is the better anchor when the decision is about how to assess a specific risk or threat scenario. NIST SP 800-30 Rev. 1Sources 1	Use ISO/IEC 27005 to frame the program and NIST SP 800-30 to support the assessment work inside that frame. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Who must act	ISO/IEC 27005 ownership should sit with the team that runs the ISMS or the related risk-management process, because the work depends on management-system ownership, evidence, and review discipline. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 ownership should sit with the team performing the risk assessment, because the work is about analyzing a specific risk, threat source, vulnerability, or impact set. NIST SP 800-30 Rev. 1Sources 1	Do not copy owners from one side to the other; assign the management-system owner separately from the assessment owner. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Trigger or threshold	ISO/IEC 27005 work is triggered by management-system needs such as scope definition, implementation, audit readiness, customer assurance, control gaps, incidents, supplier change, or review cycles. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 work is triggered by the need to assess a risk question, such as a new threat, vulnerability, system change, or decision that needs a documented risk analysis. NIST SP 800-30 Rev. 1Sources 1	If the question is how to run the risk program, start with ISO/IEC 27005; if the question is how to assess one risk scenario, start with NIST SP 800-30. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Core obligations	ISO/IEC 27005 expects management-system discipline: define the scope, assign owners, keep evidence current, and review the risk process on a schedule. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 expects assessment discipline: identify threats, vulnerabilities, likelihood, impact, and uncertainty, then record the rationale for the risk result. NIST SP 800-30 Rev. 1Sources 1	Use ISO/IEC 27005 for ongoing governance and NIST SP 800-30 for the analytical work that supports each assessment. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Evidence and records	ISO/IEC 27005 evidence should show the management system operating: scope, risk criteria, treatment decisions, approvals, reviews, and improvement actions. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 evidence should show the assessment logic: sources, scenarios, likelihood, impact, uncertainty, and the documented risk determination. NIST SP 800-30 Rev. 1Sources 1	Keep the management-system record on the ISO/IEC 27005 side and the assessment record on the NIST SP 800-30 side, then link them where they support the same decision. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Timing and cadence	ISO/IEC 27005 timing follows the management-system calendar: implementation, audit, certification, review, supplier, incident, or change cycles. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 timing follows the assessment need: it is refreshed when a new threat, vulnerability, system change, or decision requires a current risk analysis. NIST SP 800-30 Rev. 1Sources 1	Track dates separately so an ISO review cycle does not get mistaken for a new risk assessment, and a NIST assessment does not get treated like the whole management system. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Enforcement or assurance route	ISO/IEC 27005 is usually tested through certification audits, internal audits, customer assurance, management review, or governance review, depending on how the organization adopts it. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 is usually tested through the quality of the risk assessment itself: whether the threats, vulnerabilities, likelihood, impact, and uncertainty are explained well enough to support the decision. NIST SP 800-30 Rev. 1Sources 1	Use ISO/IEC 27005 to show the program is run consistently, and use NIST SP 800-30 to show each assessment is reasoned and documented. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Overlap and reuse	ISO/IEC 27005 can supply reusable management-system evidence, control operation records, risk decisions, and review outputs. ISO/IEC 27005:2022 standard pageSources 1	NIST SP 800-30 can reuse some of that evidence when the risk question, scope, owner, and time period are the same. NIST SP 800-30 Rev. 1Sources 1	Reuse evidence only after checking scope, actor, date, data type, service, supplier, and acceptance criteria; otherwise keep separate records. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2
Practical decision rule	Use ISO/IEC 27005 when the main work is building, operating, reviewing, or proving a management-system or standards-based control process. ISO/IEC 27005:2022 standard pageSources 1	Use NIST SP 800-30 when the main work is answering a specific risk-assessment question and documenting the likelihood and impact reasoning behind the answer. NIST SP 800-30 Rev. 1Sources 1	If both apply, keep the ISO/IEC 27005 management-system record visible and use NIST SP 800-30 to support the risk analysis inside it. ISO/IEC 27005:2022 standard pageSources 1 NIST SP 800-30 Rev. 1Sources 2

Comparison row 1

Scope and covered activity

ISO/IEC 27005

ISO/IEC 27005 is guidance for managing information security risks in an ISMS context, so it is the better anchor when the decision is about the full risk-management process.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 is guidance for conducting risk assessments, so it is the better anchor when the decision is about how to assess a specific risk or threat scenario.

NIST SP 800-30 Rev. 1

Operational implication

Use ISO/IEC 27005 to frame the program and NIST SP 800-30 to support the assessment work inside that frame.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 2

Who must act

ISO/IEC 27005

ISO/IEC 27005 ownership should sit with the team that runs the ISMS or the related risk-management process, because the work depends on management-system ownership, evidence, and review discipline.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 ownership should sit with the team performing the risk assessment, because the work is about analyzing a specific risk, threat source, vulnerability, or impact set.

NIST SP 800-30 Rev. 1

Operational implication

Do not copy owners from one side to the other; assign the management-system owner separately from the assessment owner.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 3

Trigger or threshold

ISO/IEC 27005

ISO/IEC 27005 work is triggered by management-system needs such as scope definition, implementation, audit readiness, customer assurance, control gaps, incidents, supplier change, or review cycles.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 work is triggered by the need to assess a risk question, such as a new threat, vulnerability, system change, or decision that needs a documented risk analysis.

NIST SP 800-30 Rev. 1

Operational implication

If the question is how to run the risk program, start with ISO/IEC 27005; if the question is how to assess one risk scenario, start with NIST SP 800-30.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 4

Core obligations

ISO/IEC 27005

ISO/IEC 27005 expects management-system discipline: define the scope, assign owners, keep evidence current, and review the risk process on a schedule.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 expects assessment discipline: identify threats, vulnerabilities, likelihood, impact, and uncertainty, then record the rationale for the risk result.

NIST SP 800-30 Rev. 1

Operational implication

Use ISO/IEC 27005 for ongoing governance and NIST SP 800-30 for the analytical work that supports each assessment.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 5

Evidence and records

ISO/IEC 27005

ISO/IEC 27005 evidence should show the management system operating: scope, risk criteria, treatment decisions, approvals, reviews, and improvement actions.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 evidence should show the assessment logic: sources, scenarios, likelihood, impact, uncertainty, and the documented risk determination.

NIST SP 800-30 Rev. 1

Operational implication

Keep the management-system record on the ISO/IEC 27005 side and the assessment record on the NIST SP 800-30 side, then link them where they support the same decision.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 6

Timing and cadence

ISO/IEC 27005

ISO/IEC 27005 timing follows the management-system calendar: implementation, audit, certification, review, supplier, incident, or change cycles.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 timing follows the assessment need: it is refreshed when a new threat, vulnerability, system change, or decision requires a current risk analysis.

NIST SP 800-30 Rev. 1

Operational implication

Track dates separately so an ISO review cycle does not get mistaken for a new risk assessment, and a NIST assessment does not get treated like the whole management system.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 7

Enforcement or assurance route

ISO/IEC 27005

ISO/IEC 27005 is usually tested through certification audits, internal audits, customer assurance, management review, or governance review, depending on how the organization adopts it.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 is usually tested through the quality of the risk assessment itself: whether the threats, vulnerabilities, likelihood, impact, and uncertainty are explained well enough to support the decision.

NIST SP 800-30 Rev. 1

Operational implication

Use ISO/IEC 27005 to show the program is run consistently, and use NIST SP 800-30 to show each assessment is reasoned and documented.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 8

Overlap and reuse

ISO/IEC 27005

ISO/IEC 27005 can supply reusable management-system evidence, control operation records, risk decisions, and review outputs.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

NIST SP 800-30 can reuse some of that evidence when the risk question, scope, owner, and time period are the same.

NIST SP 800-30 Rev. 1

Operational implication

Reuse evidence only after checking scope, actor, date, data type, service, supplier, and acceptance criteria; otherwise keep separate records.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Comparison row 9

Practical decision rule

ISO/IEC 27005

Use ISO/IEC 27005 when the main work is building, operating, reviewing, or proving a management-system or standards-based control process.

ISO/IEC 27005:2022 standard page

NIST SP 800-30

Use NIST SP 800-30 when the main work is answering a specific risk-assessment question and documenting the likelihood and impact reasoning behind the answer.

NIST SP 800-30 Rev. 1

Operational implication

If both apply, keep the ISO/IEC 27005 management-system record visible and use NIST SP 800-30 to support the risk analysis inside it.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Practical decision rule

How should teams decide between ISO/IEC 27005 and NIST SP 800-30 for compliance planning?

Use ISO/IEC 27005 when the question is how to run the ongoing information security risk-management process for the ISMS.
Use NIST SP 800-30 when the question is how to conduct and document a specific risk assessment.
Reuse evidence only where the same owner, scope, time period, system, supplier, data type, and acceptance criteria apply.

ISO/IEC 27005:2022 standard page NIST SP 800-30 Rev. 1

Section 1

What decision should teams make about ISO/IEC 27005 vs NIST SP 800-30 under ISO/IEC 27005 Information Security Risk Management?

For this comparison, define whether the decision is required by a standard, contract, customer assurance process, or internal model before choosing evidence and ownership.

The first decision is whether ISO/IEC 27005 vs NIST SP 800-30 changes scope, risk, control selection, evidence, certification readiness, customer commitments, or regulatory mapping. If it does, treat it as an accountable management-system decision rather than a side note.

ISO/IEC 27005 is useful when it turns broad intent into repeatable work: make information security risk decisions consistent, explainable, comparable, and usable by risk owners and control owners. Teams should record who owns the decision, what evidence supports it, and when the review date falls due.

Define the scope for ISO/IEC 27005 vs NIST SP 800-30 before assigning controls or requesting evidence.
Tie each claim to a decision record, an owner, and current evidence rather than a policy label alone.
Review the record whenever assets, threats, suppliers, business processes, controls, or risk appetite change and at planned risk review intervals.

Sources for this answer

ISO/IEC 27005:2022 standard page

This ISO listing supports the ISO/IEC 27005 side of the comparison by identifying it as guidance for managing information security risks in an ISMS context.

ISO/IEC 27001:2022 standard page

This ISO listing supports the ISMS context because ISO/IEC 27005 risk work is used alongside ISO/IEC 27001 requirements.

Section 2

Which records should prove ISO/IEC 27005 vs NIST SP 800-30 is implemented correctly?

Evidence should be collected where the work actually happens. For ISO/IEC 27005, that usually means risk criteria, scenario library, asset and threat assumptions, likelihood and impact rationale, inherent and residual ratings, treatment decisions, approvals, review dates, and control links.

A strong evidence set tells a visitor, auditor, customer, or decision owner what was decided, why it was reasonable, who approved it, and when it must be reviewed again.

Artifact-specific evidence: risk criteria, scenarios, likelihood and impact rationale, treatment decisions, residual-risk approvals, and review records.
Decision record: scope, assumption, risk or obligation, owner, approval, and date.
Operation record: ticket, log, review, test, contract clause, register entry, or control sample showing the process ran.
Review record: result, exception, corrective action, next owner, and next review date.

Sources for this answer

ISO/IEC 27001:2022 standard page

This ISO listing supports the ISMS context because ISO/IEC 27005 risk work is used alongside ISO/IEC 27001 requirements.

NIST SP 800-30 Rev. 1

This NIST publication supports the comparator side by identifying SP 800-30 Rev. 1 as guidance for conducting risk assessments.

Section 3

How should teams turn ISO/IEC 27005 vs NIST SP 800-30 into a repeatable workflow?

Build the workflow around a small number of durable checkpoints: intake, classification, owner assignment, evidence request, decision, review, and escalation. This keeps the work usable across audits, customer assurance, and operational reviews.

Avoid overfitting the workflow to one audit cycle. The same record should help during normal operations, change review, incident response, supplier review, or management review depending on the topic.

Intake: describe the system, service, supplier, control, incident, AI system, or process affected.
Classification: decide whether this is scope, risk, treatment, evidence, contract, incident, privacy, continuity, or AI governance work.
Escalation: route exceptions to the person or forum that can accept risk or fund remediation.

Sources for this answer

NIST SP 800-30 Rev. 1

This NIST publication supports the comparator side by identifying SP 800-30 Rev. 1 as guidance for conducting risk assessments.

ISO/IEC 27005:2022 standard page

This ISO listing supports the ISO/IEC 27005 side of the comparison by identifying it as guidance for managing information security risks in an ISMS context.

Recommended next step

Operationalize ISO/IEC 27005 vs NIST SP 800-30

Define owner, evidence requirements, evidence requests, and the next review date before approval.

Assessment workflow

Open Assessment Autopilot for ISO/IEC 27005

Convert ISO/IEC 27005 vs NIST SP 800-30 into accountable tasks, evidence requests, and review checkpoints.

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Talk to Sorena

Talk through ISO/IEC 27005 vs NIST SP 800-30 implementation

Review your current scope, evidence gaps, and next implementation steps.

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Section 4

What mistakes make ISO/IEC 27005 vs NIST SP 800-30 weak or hard to audit?

When implementation documentation is not tied to a real owner, system, supplier, recovery target, control sample, risk decision, and operations context, it can appear complete but leaves no defensible evidence when reviewed.

Another failure is mixing standards and regulations without stating which source creates the requirement. Use ISO standards to structure management-system practice, and use legal sources separately when a binding obligation applies.

Do not cite a standard title as evidence that a process is operating.
Do not reuse an old audit artifact after the scope, service, supplier, or risk has changed.
Do not hide exceptions; record them as risk acceptance, corrective action, or management-review inputs.

Sources for this answer

ISO/IEC 27005:2022 standard page

This ISO listing supports the ISO/IEC 27005 side of the comparison by identifying it as guidance for managing information security risks in an ISMS context.

ISO/IEC 27001:2022 standard page

This ISO listing supports the ISMS context because ISO/IEC 27005 risk work is used alongside ISO/IEC 27001 requirements.

Section 5

How should teams review and improve ISO/IEC 27005 vs NIST SP 800-30 over time?

Review should happen when assets, threats, suppliers, business processes, controls, or risk appetite change and at planned risk review intervals. If the review changes the decision, update the register, workflow, control evidence, or contract record that downstream teams rely on.

Improvement is strongest when the same evidence supports multiple needs: certification audits, customer assurance, regulatory mapping, supplier governance, incident reviews, and management review.

Set a review date and a change-trigger rule.
Track findings until closure and connect them to corrective actions or risk acceptance.
Use management review to decide resourcing, risk appetite, scope changes, and evidence quality.

Sources for this answer

ISO/IEC 27001:2022 standard page

This ISO listing supports the ISMS context because ISO/IEC 27005 risk work is used alongside ISO/IEC 27001 requirements.

NIST SP 800-30 Rev. 1

This NIST publication supports the comparator side by identifying SP 800-30 Rev. 1 as guidance for conducting risk assessments.

Primary sources

References and citations

ISO/IEC 27001:2022 standard page

iso.org

Referenced sections

This ISO listing supports the ISMS context because ISO/IEC 27005 risk work is used alongside ISO/IEC 27001 requirements.

"Information security management systems - Requirements"

ISO/IEC 27005:2022 standard page

iso.org

Referenced sections

This ISO listing supports the ISO/IEC 27005 side of the comparison by identifying it as guidance for managing information security risks in an ISMS context.