ISO 27001 Cost 2026: Real Price Ranges by Line Item

ISO 27001 certification cost in 2026 is set mostly by audit days: an accredited certification body needs 5 auditor days for a 10-person organization and 12 days for about 100 people, and published US day rates are $1,500 to $2,200. Around that audit fee sit the consulting or implementation work, an internal audit, tooling and two surveillance audits over the three-year certificate cycle. Every figure below links to the standards body, accreditation body or firm that published it.

Last updated: October 5, 2026. Third-party figures are in US dollars unless marked otherwise. Truvo Cyber figures are rounded US-dollar ranges for SMBs of up to 100 people, based on 2025 and 2026 engagements.

ISO 27001 certification audit cost: audit days times day rate

The ISO 27001 certification audit fee equals the number of auditor days multiplied by the certification body's day rate. The days come from a table in ISO/IEC 27006-1, the standard certification bodies must follow, and they scale with the number of people working under the organization's control.

1. ISO/IEC 27006-1:2024 sets the requirements for bodies certifying ISO 27001 management systems; it was published in March 2024 and replaced ISO/IEC 27006:2015 (ISO, 2024).
2. Under the ISO/IEC 27006 audit-time table, a Stage 1 plus Stage 2 audit takes 5 auditor days for 1 to 10 people (Intertek audit-day chart).
3. The same table sets 7 auditor days for 16 to 25 people and 8.5 days for 26 to 45 people (Intertek).
4. The table sets 10 auditor days for 46 to 65 people, 12 days for 86 to 125 people and 14 days for 176 to 275 people (Intertek).
5. Under ISO/IEC 27006-1:2024, freelancers and contractors count toward headcount for audit-time purposes, whether or not they are employees (usd AG, 2025).
6. Accredited ISO 27001 auditors in the US charge $1,500 to $2,200 per audit day (Consilien, 2026).
7. At a typical UK day rate of £1,250, a 5-day initial audit costs about £6,250 (GRC Solutions, 2025).
8. A combined Stage 1 and Stage 2 audit costs $6,000 to $12,000 for organizations under 25 people, $9,000 to $18,000 for 25 to 100 people and $15,000 to $35,000 for 100 to 500 people (BD Emerson, 2026).

The dollar column multiplies the published day count by the published US day-rate range. Certification bodies can adjust days up or down for complexity, and they add travel for on-site work, so treat the table as the baseline a quote starts from.

In Truvo Cyber engagements in 2025 and 2026, certification bodies quoted about $6,500 to $8,000 for the initial certification of a small SMB scope of fewer than 10 people, and about $4,000 a year for surveillance.

No US accredited certification body publishes a public ISO 27001 fee schedule. Firms such as Schellman quote fixed fees after scoping, which is why the audit-day table is the most reliable way to predict a quote.

ISO 27001 three-year cycle cost: surveillance and recertification

ISO 27001 certification is a three-year cycle: an initial audit, two annual surveillance audits and a recertification audit. The surveillance and recertification fees are recurring costs.

9. Surveillance audits each take about one third of the initial certification audit time, and the recertification audit takes about two thirds (Schellman, updated 2025).
10. The IAF's general accreditation rule sets annual surveillance at about 1/3 of initial audit time and recertification at about 2/3, and caps reductions in audit time at 30% (IAF MD 5:2023).
11. ISO 27001 surveillance audits cost $4,000 to $12,000 per year (BD Emerson, 2026).
12. ISO 27001 maintenance costs $6,000 to $25,000 per year after the first year (Consilien, 2026).
13. A 100-person organization's three-year ISO 27001 total comes to around $135,000 in one published estimate (BD Emerson, 2026).

ISO 27001 cost by driver: what moves the price

ISO 27001 cost is set by five drivers: headcount, ISMS scope, consulting help, the standard and tooling, and whether SOC 2 already exists.

ISO 27001 consulting and implementation cost

ISO 27001 implementation help is a separate invoice from certification, because accreditation rules keep the certification body independent of the work it certifies.

14. ISO 27001 consultants charge $15,000 to $60,000 to implement an ISMS (BD Emerson, 2026).
15. Total first-year ISO 27001 cost is $15,000 to $50,000 for organizations under 50 users and $50,000 to $150,000 for 50 to 250 users (Consilien, 2026).
16. Outsourced ISO 27001 internal audits cost $5,000 to $15,000 (BD Emerson, 2026).
17. For most SMBs, a Truvo Cyber ISO 27001 internal audit costs USD $5,000 to $15,000 as a fixed fee set by ISMS scope.

The ISO 27001 internal auditor guide covers what to check before hiring one.

ISO 27001 scope and headcount

ISO 27001 scope decides how many people and sites count toward audit days. A scope that covers one product and its cloud infrastructure keeps the in-scope headcount, and the audit-day count, lower than a scope that pulls in all of corporate IT and multiple offices. The certificate must still cover what customers ask about, so scope to the product under procurement review.

ISO 27001 standard and transition costs

The ISO 27001 standard itself is a small, fixed cost; the 2022 transition was the large one, and it has passed.

18. ISO/IEC 27001:2022 costs CHF 155 from the ISO store, is 19 pages long and was published in October 2022 (ISO).
19. Amendment 1:2024 to ISO/IEC 27001:2022, which adds climate action changes, is free (CHF 0) (ISO).
20. All ISO/IEC 27001:2013 certificates expired or were withdrawn at the end of the transition period on October 31, 2025 (IAF MD 26:2023).
21. In Canada, accredited certification bodies had to issue initial and recertification audits only to ISO/IEC 27001:2022 from April 30, 2024 (Standards Council of Canada, 2023).

ISO 27001 cost when SOC 2 already exists

ISO 27001 costs less when a SOC 2 program already exists, because much of the security control work is shared. What ISO 27001 adds is the management system: the ISMS, risk treatment, the Statement of Applicability, management review and internal audit. The SOC 2 vs ISO 27001 comparison maps where the two overlap and how to sequence them.

ISO 27001 adoption: how many organizations hold the certificate

ISO 27001 is held by close to 100,000 certified organizations worldwide, which is why enterprise and European buyers ask for it by name.

22. The ISO Survey 2024 counted 96,709 ISO/IEC 27001 certificates covering 179,877 sites (ISO Survey 2024, via Global Standards; ISO Survey).

Total first-year ISO 27001 cost: add the invoices

The total first-year ISO 27001 cost is the sum of separate invoices from different parties. For an organization of about 50 people, the sourced ranges add up like this:

How to lower ISO 27001 cost without weakening the certificate

ISO 27001 cost drops most when headcount in scope, timing and framework overlap are decided early.

The ISO 27001 Accelerator settles those decisions at the start of a fixed program that aims for certification-ready in eight weeks.

1. Scope to the product buyers are reviewing. Fewer in-scope people means fewer audit days, every year of the cycle.
2. Get three certification body quotes against the same scope. Compare day counts first, then day rates.
3. Check accreditation before price. Buyers check that the certificate comes from an accredited certification body; an unaccredited certificate is a second cost later.
4. Build once for SOC 2 and ISO 27001. Shared controls cut the second framework's cost; the SOC 2 compliance hub covers the SOC 2 side.
5. Use the certificate in sales. An ISO 27001 certificate and Statement of Applicability answer much of the security questionnaire work that slows enterprise deals.

How to cite this page

Truvo Cyber. (2026, October 5). ISO 27001 Cost 2026: Real Price Ranges by Line Item. https://truvocyber.com/blog/iso-27001-cost

Frequently Asked Questions

How much does ISO 27001 certification cost in 2026?

ISO 27001 certification audit fees depend on audit days and day rates: a 10-person organization needs 5 auditor days under the ISO/IEC 27006 table, and US day rates are $1,500 to $2,200 (Consilien, 2026). Total first-year cost including implementation is $15,000 to $50,000 for organizations under 50 users (Consilien, 2026).

How many audit days does ISO 27001 certification take?

ISO 27001 Stage 1 and Stage 2 audits together take 5 auditor days for 1 to 10 people, 10 days for 46 to 65 people and 14 days for 176 to 275 people, under the audit-time table in ISO/IEC 27006.

How much do ISO 27001 surveillance audits cost?

ISO 27001 surveillance audits take about one third of the initial audit time each year (Schellman, 2025) and cost $4,000 to $12,000 per year in one published estimate (BD Emerson, 2026).

How much does the ISO 27001 standard cost to buy?

ISO/IEC 27001:2022 costs CHF 155 from the ISO store, and Amendment 1:2024 is free.

How long is an ISO 27001 certificate valid?

An ISO 27001 certificate is valid for three years, with surveillance audits in years two and three and a recertification audit before it expires.

Truvo Cyber builds and operates ISO 27001 programs as a fractional security team, separate from the certification body that audits them. The ISO 27001 certification service page sets out what that covers.