How much does ISO 27001 certification really cost?
Updated 26 March 2026
ISO 27001 is the global standard for information security management. Costs range from $15k for a small startup to $500k+ for a large enterprise. Enter your details below for a tailored estimate.
Your Organisation Profile
Small business or growing startup
Drives training and audit day estimates
Each additional site increases audit days
Some security measures but undocumented
First-Year Certification Cost
$34k-$114k
Gap analysis, ISMS, controls, internal audit, certification body
Annual Surveillance (Year 2)
$4k-$16k
CB surveillance audit + tools + refresher training
Cost Breakdown by Phase
Recertification Cost (Year 3)
$9k-$32k
Full re-audit every 3 years - typically less than initial
3-Year Total Investment
$47k-$162k
Year 1 + Year 2 surveillance + Year 3 recertification
Implementation Timeline
6-10 months
From kickoff to certification awarded
Certification Body Fee Only
$4k-$12k
Stage 1 + Stage 2 audit fees paid to the accredited CB
Your estimated first-year investment: $34k-$114k
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Frequently Asked Questions
How much does ISO 27001 certification cost?
ISO 27001 certification costs vary by organisation size and maturity. Small organisations (under 50 staff) typically spend $15,000-$50,000 for first-time certification. Mid-size organisations (50-250 staff) spend $50,000-$150,000. Large enterprises spend $150,000-$500,000+. Annual surveillance audits in years 2 and 3 run 30-40% of the initial certification audit fee.
What does ISO 27001 certification include?
ISO 27001 certification involves: a gap analysis (assessing current state vs. the standard), ISMS development (policies, risk register, Statement of Applicability, procedures), implementation of selected Annex A controls, an internal audit, a management review, and then a two-stage certification audit by an accredited certification body. Stage 1 is a documentation review; Stage 2 is the full on-site assessment.
How long does ISO 27001 implementation take?
Implementation typically takes 6-18 months depending on organisation size, current security maturity, and available internal resources. Small organisations with a dedicated project lead can achieve certification in 6-9 months. Larger enterprises with complex IT environments typically need 12-18 months.
How often does ISO 27001 need to be renewed?
ISO 27001 certification is valid for 3 years. Annual surveillance audits are required in year 1 and year 2 to maintain the certificate. In year 3, a full recertification audit is required. Surveillance audits typically cost 30-40% of the initial certification audit fee.
Can we implement ISO 27001 without a consultant?
Yes, but it is challenging without experience. Most organisations use an external consultant for gap analysis and ISMS framework development, then handle implementation internally. A consultant typically costs $10,000-$60,000 depending on scope and their level of ongoing involvement. Using an ISMS platform (Vanta, Drata, Sprinto) can reduce consultant dependency and speed up implementation significantly.
What is the difference between ISO 27001 and SOC 2?
ISO 27001 is an internationally recognised certification awarded by accredited certification bodies. It covers information security management broadly. SOC 2 is a US-originated attestation report focused on cloud and SaaS service providers, covering security, availability, processing integrity, confidentiality, and privacy. ISO 27001 is preferred by European buyers; SOC 2 is standard for US SaaS enterprise sales. Many organisations pursue both.