July 2026. Dutch SaaS and IT vendors often get both asks: SOC 2 Type II from US enterprise and ISO 27001 from European chain and government. Duplicate audits cost money — smart overlap is possible.
Core differences
- ISO 27001: certifiable management system (ISMS), Annex A, surveillance, internationally recognised.
- SOC 2: auditor report on Trust Services Criteria (security, availability, etc.), often US-focused.
- ISO = structural PDCA; SOC 2 = point-in-time assurance over chosen criteria.
Use overlap
One risk register, one control catalogue, one evidence map tagged ISO/SOC. Many controls (access, change, logging, vendor) are identical — document mapping and avoid parallel uploads.
When which?
US customers only: SOC 2 may suffice. EU/NIS2/DORA chain: ISO 27001 remains leading. Both markets: plan combined internal audit and evidence prep. More: compare ISO frameworks.
In 2026 some US buyers accept ISO 27001 alongside SOC 2 — ask explicitly which report they need before starting a second audit.
Evidence map for both frameworks
Build a matrix: control description, ISO Annex A ref, SOC TSC criterion, evidence location, owner. In audit or questionnaire you reference one folder with tags — no duplicate uploads.
Internal audit can cover both criteria sets in one round when scope overlaps. Plan external audits smartly: some certification bodies and SOC auditors accept combined planning with shared evidence prep.
Discuss in management review which market has priority and when a second audit makes sense versus customer acceptance of ISO alone.
Next steps in your ISMS
Turn this article into one concrete action in your risk register or improvement plan: owner, deadline, expected evidence. Discuss progress in the next management review — auditors and chain partners want decisions, not policy intent alone. Link where possible to existing ISO 27001, NIS2 or GDPR documentation so you do not maintain parallel folders.
Questions on scope, certification or chain requirements? Use our readiness overview and knowledge base for deeper guidance. This article does not replace legal or audit advice for your situation.
Share relevant findings briefly with line management and procurement — compliance becomes workable when the whole organisation recognises the same priorities. Repeat the chosen action quarterly in team meetings and update evidence locations in your SoA or control plan so surveillance samples are easy to answer.
What to do this week
Pick one concrete action from this article, assign an owner and add it to your risk or improvement register with a deadline. Share briefly in team meetings so compliance is something the line recognises. Repeat quarterly in management review so leadership sees progress, not only intent.
Note: this article is educational and does not replace legal, privacy or audit advice for your specific situation.
Evidence and governance
Record who owns the measures in this article and how you prove operation in the sample period — logs, tickets, approved changes or exercise reports. Certification bodies and chain partners do not accept intent without samples. Link evidence locations to your SoA or control plan so internal and external audit use the same sources.
Chain and contracts
Many 2026 requirements come via customers, not only formal law scope. Align contract SLAs with your ISMS: incident notification, audit rights, patch timelines and exit. Document where contract is stricter than internal policy — management review must explicitly accept that gap or plan investment.
Continual improvement
Plan a short quarterly review: what worked, which near-miss stood out, which control needs extra attention? Record three improvement actions with owners — that is what ISO 27001, NIS2 and GDPR supervision want to see: PDCA in practice, not paper only.
Knowledge base and readiness
For deeper guidance see our knowledge base on ISMS, ISO 27001, NIS2 and GDPR. Use the readiness overview to compare priorities with your current maturity. This article is educational; engage specialists for legal or audit decisions.
Evidence and governance
Record who owns the measures in this article and how you prove operation in the sample period — logs, tickets, approved changes or exercise reports. Certification bodies and chain partners do not accept intent without samples. Link evidence locations to your SoA or control plan so internal and external audit use the same sources.
Chain and contracts
Many 2026 requirements come via customers, not only formal law scope. Align contract SLAs with your ISMS: incident notification, audit rights, patch timelines and exit. Document where contract is stricter than internal policy — management review must explicitly accept that gap or plan investment.