How much does ISO 27001 cost?

By Sam Rivera, Founder, SentinelPanda · June 19, 2026 · 1 min read · ISO 27001

The certification body is a recurring line item SOC 2 does not have. Scope and internal time are still the bigger numbers.

The cost buckets

ISO 27001 has the same three buckets as SOC 2 — external auditor, tooling, and internal time — but the external one recurs more visibly. You pay an accredited certification body for the initial two-stage audit and then for annual surveillance audits across the three-year cycle, plus recertification.

What drives the auditor fee

Certification-body fees scale with the scope and size of your ISMS: number of people, sites, and the complexity of what is in scope. A focused ISMS around a single SaaS product and a small team is at the low end; broad scope across products and locations costs more and takes more audit days.

Internal time is the quiet cost

As with SOC 2, the under-estimated bucket is your own team's hours: building the ISMS, running internal audits and management reviews, and collecting evidence. The management-system requirements (audits, reviews, corrective action) add recurring internal effort that a SOC 2 does not, which is the real cost difference.

Scope down to control it

The cheapest ISO 27001 is the smallest one that covers what your buyers care about — a tight scope, one service, a clean boundary. SentinelPanda keeps the evidence and audit cadence continuous so the internal-time bucket stays small; an accredited body still performs the certification.