ISO 27001 certification cost: what founders actually pay in 2026

ISO 27001 certification has two distinct cost buckets that most people conflate.

The audit fee is what you pay the certification body — the accredited firm that will inspect your ISMS and stamp your certificate. This is the non-negotiable, external spend.

The readiness cost is everything you do to prepare before the auditor walks in: implementing controls, writing policies, training staff, and tooling up. This is where costs vary wildly, and where you have the most control.

Most "ISO 27001 cost" content adds them together and gives you a number. That's misleading. They have completely different levers.

A Stage 1 and Stage 2 audit from an accredited certification body — Bureau Veritas, BSI, SGS, DNV — will typically run between $8,000 and $20,000 for a startup with 10–50 employees.

What moves that number:

• • Employee count. Auditors price by scope. More people = more man-days to assess.
• • Site count. Fully remote companies often pay less. Multiple offices add cost.
• • Auditor brand. BSI charges a premium. Smaller regional bodies charge less for the same accreditation.
• • Surveillance audits. Your certificate lasts 3 years. Year 2 and Year 3 annual surveillance audits run $3,000–$6,000 each.

One thing that doesn't affect the audit price: how well-prepared you are. The auditor charges for time, not for how clean your controls are.

This is the part that blows budgets.

A consultant-led engagement — where an external firm runs your ISO 27001 project end to end — will cost $20,000 to $60,000. Enterprise-focused firms will quote $80,000+.

If you use a compliance platform instead (Vanta, Drata, Probo), the tool cost is typically $6,000 to $15,000 per year, but your team still has to do the actual work.

If you do it mostly yourself with a lean platform and one day a week from your CTO: $8,000 to $20,000 total, including the audit.

The honest breakdown for a 20-person SaaS company doing it properly, not cutting corners:

A penetration test.

Most auditors will expect to see evidence of a recent pentest before they sign off. It's not formally mandatory in ISO 27001:2022, but in practice most certification bodies treat it as standard for Annex A control 8.8 (management of technical vulnerabilities).

A basic pentest from a reputable firm runs $3,000 to $8,000 for a standard web application. If you don't budget for it, you'll find out at the worst moment — during Stage 1.

For more nuance on when a pentest is required, see Do you need a pen test for ISO 27001?

Consultants sell time. Platforms sell tooling.

If you have no compliance knowledge internally and no time to build it, a consultant gets you to the finish line faster. You're paying for expertise and project management, not just deliverables.

If you have a technically literate CTO who can own the project, a platform is almost always the better value. The platforms structure the work, track evidence, generate the required documentation, and reduce the audit to a relatively predictable exercise.

The trap: assuming that paying a consultant means you don't need a platform, or vice versa. Some companies pay for both and end up with duplicate work and two different sets of documentation. Pick one model before you start.

Roughly the same, with one key difference: ISO 27001 gives you an internationally recognised certificate that never expires until de-certified, while SOC 2 gives you a point-in-time report valid for 12 months.

If your customers are primarily in Europe, ISO 27001 is almost always the better investment. North American enterprise buyers are more likely to ask for SOC 2.

If you're not sure, the short version: ask the three prospects who've actually raised it what they want. Don't guess.

For SOC 2 numbers, see what SOC 2 costs.

Before you commit to a budget, answer these:

• • Who is actually asking for ISO 27001? Named prospects with real deals, or a vague "we should probably have it"?
• • Is a Stage 1 + Stage 2 audit enough, or does the prospect require surveillance audits too?
• • Do you have an existing pentest? If not, add $5,000 to your budget immediately.
• • Will the CTO own this, or do you need a consultant? Decide before you engage anyone.
• • Do you have a scope document? Narrowing scope (e.g., excluding certain systems) reduces your audit fee.

Getting ISO 27001 certified is achievable in 3–6 months for most startups. The cost is controllable if you go in with a clear scope and a realistic estimate of internal time.

If you're going through ISO 27001, Probo gets your team audit-ready with less than 10 hours of their time, maps your controls automatically, and tracks evidence in one place.

See how Lucis got ISO 27001 certified with Probo, or talk to us about your scope and budget.