ISO 27001 cost, like SOC 2, is mostly not the audit. The certification audit from an accredited body is one line; building and evidencing the information security management system (ISMS) and its Annex A controls is the larger investment. All-in for a small-to-mid company, expect a range comparable to SOC 2 or somewhat higher.
Book a 15-minute review →The cost pieces: the certification audit (a two-stage initial assessment by an accredited body, then annual surveillance audits), readiness and ISMS build-out (risk assessment, Statement of Applicability, policies, and closing control gaps), tooling, and internal time. The certification body's fee is a minority of the total; the ISMS work dominates.
The ISMS is what makes ISO distinct: unlike a point-in-time report, ISO 27001 certifies that you run a management system - so you're building and maintaining risk assessments, a Statement of Applicability across the 93 Annex A controls, and evidence the system operates. That ongoing operation is the real cost and the real value.
How to keep it down: the same lever as every framework - generate evidence from monitoring rather than manual effort, and reuse it. If you already have SOC 2, much of the control work carries over, because the underlying controls overlap heavily.
MDRwatchdog maps continuous monitoring to the Annex A controls and supports your Statement of Applicability with live evidence, keeping the ISMS current between surveillance audits - so the ongoing cost stays manageable. The certificate itself is issued by an accredited body; we provide readiness and evidence. Not legal advice.
All-in for a small-to-mid company is comparable to SOC 2 or somewhat higher, with the accredited-body audit fee only a minority of the total - the ISMS build-out and evidence work dominate.
ISO certifies an ongoing management system (ISMS) with initial plus annual surveillance audits, so there's continuous operation cost - but the control work overlaps heavily with SOC 2 if you already have it.
Generate control evidence from monitoring rather than manual effort, reuse work from any existing framework, and keep the ISMS current continuously rather than scrambling before surveillance audits.
MDRwatchdog provides security monitoring and compliance evidence to support readiness. It is not a certification and not legal advice. Certification and formal audits are performed by the appropriate authorized bodies (a C3PAO for CMMC, a licensed CPA firm for SOC 2, an accredited body for ISO 27001).