ISO 27001 Certification Cost in 2026: Audit Fees, Audit Days and the Full Breakdown

ISO 27001 certification cost for most organizations runs from about $10,000 to $75,000 or more across the three-year certificate cycle, according to Drata’s cost guide (February 2026), with smaller companies at the low end. Treat that low end with care: Vanta puts the Stage 1 and Stage 2 audit at $14,000 to $16,000 and each annual surveillance audit at $6,000 to $7,500, so the certification body’s audits alone come to $26,000 to $31,000 over three years. That fee follows the number of people inside your ISMS scope; readiness help, a compliance platform, the penetration testing behind Annex A 8.8 and 8.29, and your own staff time make up the rest.

Invadel is a penetration testing company, not a certification body, so we do not issue ISO 27001 certificates. We price one line and publish it: the testing evidence described on our ISO 27001 penetration testing page, from $4,200 for an external network test and $1,500 for a validated vulnerability scan, or both as one vulnerability assessment and penetration testing (VAPT) engagement. Every test is fixed in writing and includes a free retest; all our prices are on the pricing page.

ISO 27001 certification cost at a glance

Ranges come from cost guides by Vanta, Drata and Secureframe (three compliance platform vendors) and AWS Marketplace list prices. Where they differ, the table shows each.

Budget line	Who provides it	Published range	Required?
ISO/IEC 27001 and 27002 standards	ISO or a national standards body	About $244 (Drata) to $350 (Vanta) for both	You need the text
Gap analysis	A consultant, a platform or your team	$5,000 to $8,000 (Vanta, Drata)	Optional
Implementation consultant	An ISO 27001 consultant	About $30,000 (Vanta); about $38,000 on average, at $1,400 to $1,800 a day (Secureframe, citing Pivot Point Security)	Optional
Compliance platform	Vanta, Drata and others	$25,000 a year plus $7,500 for ISO 27001 (Drata on AWS Marketplace)	Optional
Policies and procedures	Your team, a consultant or templates	$5,000 to $15,000 or more if outsourced (Drata)	The documents are required; paying for them is not
Internal audit (Clause 9.2)	An objective employee or an outside internal auditor	$0 to $6,000 (Vanta); $5,000 to $15,000 (Drata)	Yes, at planned intervals (in practice, before each yearly audit)
Penetration testing and scanning	An independent testing firm	$5,000 to $20,000 (Vanta); Invadel from $4,000 (API) or $4,200 (external network) per test, $1,500 per scan; our US penetration testing price index has the wider market	Not named; expected as evidence for 8.8 and 8.29
Remediation and security tools	Your team and your vendors	Upwards of $10,000 for security tools, by staff size and number of tools (Vanta); remediation depends on what the gap analysis and penetration test find	Depends on the gaps
Stage 1 and Stage 2 audit	An accredited certification body	$14,000 to $16,000 (Vanta); $10,000 to $50,000 (Secureframe)	Yes
Surveillance audits, years 1 and 2 of the certificate	The same certification body	$6,000 to $7,500 each (Vanta); about $5,000 (Drata)	Yes
Recertification audit, year 3	The same certification body	$14,000 to $16,000 (Vanta); $15,000 to $50,000 (Drata)	Yes, to keep the certificate
Staff time	Engineering, IT, HR and leadership	About 400 internal hours a year to maintain controls (Vanta)	Always

We sell only the testing row.

ISO 27001 audit cost: what the certification body charges

A certification body sells audit days: its quote is the days it calculates for your scope, times its day rate, plus travel for on-site visits. Ask for both numbers, because a lump sum hides which is high.

Audit days come from a chart, not a guess

Accredited bodies follow ISO/IEC 27006-1:2024, which sets the starting time for an initial audit from the number of people working under your organization’s control inside the ISMS scope. The chart below is High Table’s reproduction of it. The body then adjusts for factors such as IT complexity, information sensitivity, outsourcing and the number of sites.

People in the ISMS scope	Initial audit time (Stage 1 plus Stage 2)
1 to 10	5 days
11 to 15	6 days
16 to 25	7 days
26 to 45	8.5 days
46 to 65	10 days
66 to 85	11 days
86 to 125	12 days
126 to 175	13 days
176 to 275	14 days
276 to 425	15 days
426 to 625	16.5 days
626 to 875	17.5 days
876 to 1,175	18.5 days

So the scope statement is your biggest audit-cost lever: an ISMS covering the 40 people who build and run your product starts from 8.5 audit days, and one covering a 300-person company from 15. High Table notes a body can cut days by up to 30% for a very limited scope if it justifies the cut; a quote more than 30% below the chart with no written reason is worth questioning: ask how the body counted your people and confirm its accreditation.

Turning audit days into a budget: the day rate

Certification bodies rarely publish a day rate, and we found none that does, so ask for it in every quote. As a published reference point, High Table’s UK guide (linked above) uses £1,250 a day in its cost calculator and gives £1,500 per auditor day as its UK baseline. At those rates, the 8.5 days for a 40-person scope come to £10,625 to £12,750 before travel and the body’s adjustments. US bodies quote in dollars and their rates differ, so use the sum to sanity-check a quote, not to set a budget.

Stage 1, Stage 2 and the three-year cycle

Stage 1 reviews the ISMS design: scope, risk assessment, Statement of Applicability, and evidence of an internal audit and management review. Stage 2 samples records to confirm the ISMS and its controls operate; most bodies quote both together. The certificate is then valid for three years, maintained through annual surveillance audits and a recertification audit (NQA, an accredited certification body).

High Table puts surveillance at about a third of the initial audit fee, because each visit samples part of the ISMS. Recertification re-examines the whole system, and Vanta and Drata both price it in the same range as the original audit.

Choose an accredited certification body

Any firm can sell an ISO 27001 certificate, but only an accredited certification body can issue an accredited one, and that is the certificate customers and procurement teams check (ISO notes accreditation is not compulsory; NQA explains how accredited certificates are recognized internationally). Accreditation bodies oversee those bodies (in the United States, ANAB, part of ANSI, and IAS), and since January 1, 2026 the arrangement that recognizes accredited certificates across countries has been run by the Global Accreditation Cooperation (Global ACI), which replaced IAF and ILAC. An unaccredited certificate is cheaper because no accreditation body oversees the audit, and a procurement team that checks IAF CertSearch will not find it there.

The auditor cannot also be your consultant: BSI, for example, states that its certification arm cannot certify a management system another part of the BSI Group consulted on, so implementation help and the audit come from separate firms. And every certificate must now be to ISO/IEC 27001:2022, because the transition from the 2013 edition ended on October 31, 2025 (IAF MD 26). Audits now also cover Amendment 1:2024 (February 2024), which adds to Clause 4.1 a requirement to determine whether climate change is a relevant issue, and to Clause 4.2 a note that interested parties can have climate-related requirements.

Preparation and implementation costs

Do it yourself, hire a consultant, or buy a platform

• Do it yourself. The smallest invoice and the largest call on your staff: expect months of a senior person’s time.
• Hire a consultant. A consultant (about $30,000 per Vanta) writes the documents, facilitates the risk assessment and often runs the internal audit.
• Buy a platform. Drata’s listing prices the platform at $25,000 a year for a 100-person organization, plus $7,500 a year for the ISO 27001 framework (list prices as checked on November 11, 2026). A platform collects evidence and maps controls; it does not make your risk decisions, run your penetration test or issue the certificate. If a bundle includes the audit, compare it on the audit days it buys.

Gap analysis, policies and the risk assessment

A professional gap analysis costs $5,000 to $8,000 (Vanta, Drata), but you can run the first pass with our ISO 27001 checklist, covering every clause, the mandatory documents and all 93 Annex A controls. Outsourced documentation runs $5,000 to $15,000 or more (Drata), but Clause 5.2 names only one policy, and our free ISO 27001 policy templates cover it plus the topic-specific policies Annex A 5.1 adds. The risk assessment (Clauses 6.1.2 and 8.2) belongs to your team or consultant, not us; our security risk assessment guide walks through a method that produces dated, owned results.

Internal audit and training

Clause 9.2 requires internal audits at planned intervals, and certification bodies expect one completed before Stage 2. Vanta’s range starts at $0 because an employee can do it, but the auditor must be objective and cannot audit their own work, so small companies often hire an outside one ($5,000 to $15,000 per Drata). Awareness training runs about $1,000 a year or less (Secureframe), or up to $15,000 a session when a consultant delivers it (Vanta).

The penetration testing line: what it costs from us

ISO 27001 never says “penetration test.” Annex A 8.8 requires you to obtain information about technical vulnerabilities, evaluate your exposure and act on it; 8.29 requires security testing in development and acceptance; and Clause 9.1 requires you to evaluate whether the ISMS is effective. Many certification auditors expect a recent independent test as evidence for 8.8 and 8.29, and its results feed the 9.1 evaluation. Which compliance frameworks require penetration testing compares ISO 27001 with SOC 2, PCI DSS and others.

Here is what each component costs from us, fixed in writing before work starts:

Test	Annex A controls it evidences	Invadel fixed price, from
Validated vulnerability scan, up to 250 devices	8.8	$1,500 per scan
Validated vulnerability scan, 251 to 1,000 devices	8.8	$2,500 per scan
Web application penetration test, Small, including the APIs the app consumes	8.8, 8.26, 8.29	$5,200
Web application penetration test, Medium	8.8, 8.26, 8.29	$7,800
API penetration test	8.8, 8.29	$4,000
External network penetration test	8.8, 8.20	$4,200
Internal network penetration test	8.8, 8.20, 8.22	$6,000
Cloud penetration test	5.23, 8.8	$6,800
Microsoft 365 or Google Workspace assessment	5.15, 8.5	$4,200
Secure code review	8.28	$4,800

Any of these reports can also feed the independent review in Annex A 5.35. Three typical ISMS scopes, priced from those starting points:

ISMS scope	What we would test	Invadel price, from
20-person SaaS, one product on one cloud account	Web application Small, external network	$9,400
150-person SaaS with a public API on its own cloud account	Web application Medium, API, cloud	$18,600
Office-based firm whose ISMS covers the corporate network and Microsoft 365	External network, internal network, Microsoft 365 assessment	$14,400

Add validated scans at the cadence your 8.8 procedure sets: quarterly scans of up to 250 devices come to $6,000 a year, each with a free re-scan. The vulnerability scanning pricing and web application testing cost guide show what moves each tier, and the cost calculator adds up starting prices before scoping. For the network line, see external network penetration testing cost.

Every test includes executive and technical reports mapped to Annex A, an attestation letter, the findings platform and the free retest; reports upload cleanly into Vanta, Drata and Secureframe. Senior in-house testers do the work, and onboarding starts within 24 hours of a signed proposal. See the sample report your auditor would receive, or send your ISMS scope through the scoping questionnaire for a written price the same day.

When to buy it, so you buy it once

Test one to three months before Stage 2, so the auditor sees retested, closed findings, then within the twelve months before each surveillance visit; our ISO 27001 penetration testing page has the full timing table. A scan sold as a test (see penetration testing vs vulnerability scanning) or a test with no retest costs more later. Auditors check that each finding was risk-rated, then fixed or formally accepted; vulnerability remediation shows how to record that. If other drivers apply to you as well, our guide on how often to test sets out the cadence for each.

ISO 27001 cost over three years: what recurs

The certification year carries the one-off costs, but the cost of ISO 27001 certification over the cycle is set by what repeats.

Line	Certification	Years 1 and 2 (surveillance)	Year 3 (recertification)
Standards and gap analysis	Once	No	No
Consultant	Heaviest	Optional, a few days	Optional
Compliance platform	If used	Every year	Every year
Internal audit and management review	Yes	Every year	Yes
Penetration test and scans	Before Stage 2	Before each surveillance visit	Before recertification
Certification body	Stage 1 and Stage 2	About a third of the initial fee	Close to the initial fee

Three-year totals for the three example scopes

Audit plus testing only, for one certificate cycle: one test set before Stage 2 and one before each of the two surveillance visits, at our starting prices, plus Vanta’s published audit fees.

ISMS scope	Testing, three annual rounds, from	Certification body audits (Vanta)	Three-year total, from
20-person SaaS, one product on one cloud account	$28,200	$26,000 to $31,000	$54,200 to $59,200
150-person SaaS with a public API on its own cloud account	$55,800	$26,000 to $31,000	$81,800 to $86,800
Office-based firm, corporate network and Microsoft 365	$43,200	$26,000 to $31,000	$69,200 to $74,200

Vanta’s range is not tied to headcount, so the 150-person scope, which starts from more audit days than the 20-person one, will sit above it. The totals leave out scans, a platform, a consultant, the internal audit and staff time.

What moves the cost, and how to lower it

1. Draw the ISMS scope tightly. Audit days follow headcount in scope, so a scope around the product and its team costs less than the whole company. Keep it honest: excluding systems customers care about makes the certificate worth less to them.
2. Compare accredited bodies on days and day rates. Get two or three quotes covering the full three-year cycle, so surveillance and recertification fees are fixed on day one.
3. Watch sites and travel. More locations mean more audit time, though sampling means not every site is visited; ask how the body samples sites and which audits can run remotely.
4. Reuse what you have. If you hold SOC 2, much of the control evidence carries over, though the ISMS clauses do not, and one penetration test mapped to both serves both audits. ISO 27001 vs SOC 2 shows the overlap, and the SOC 2 cost guide prices that report line by line.
5. Arrive at Stage 2 ready. A major nonconformity must be corrected before the certification decision, and verifying the fix can mean extra billed audit days. Run the internal audit early enough to fix what it finds.

Frequently asked questions

How much does ISO 27001 certification cost for a small business? Drata puts most organizations at $10,000 to $75,000 or more over the three-year cycle, with smaller companies at the low end, but Vanta’s audit fees alone total $26,000 to $31,000. A company with 16 to 25 people in scope starts from 7 audit days under the 27006-1 chart, so a tight ISMS scope is the biggest saving.

How much does an ISO 27001 audit cost? The initial certification audit runs $14,000 to $16,000 per Vanta and $10,000 to $50,000 per Secureframe. The fee is audit days times the body’s day rate, so ask for both.

What is a typical ISO 27001 auditor day rate? Certification bodies rarely publish one. High Table’s UK guide works from £1,250 to £1,500 per auditor day; US bodies quote in dollars. Ask each body for its day count and its day rate in writing.

How much does ISO 27001 cost each year after certification? Each surveillance audit, in years one and two of the certificate, runs $6,000 to $7,500 per Vanta. On top of that come the lines that repeat: the internal audit, the penetration test and scans, and the compliance platform if you use one.

How long does ISO 27001 certification take? NQA says well-managed projects with experienced internal resources can certify in two to three months, and that six months or more is not uncommon.

How much of the ISO 27001 budget is penetration testing? With us, from $4,000 for an API test or $4,200 for an external network test, and from $9,400 for a typical small SaaS scope (web application plus external network), against $14,000 to $16,000 for the initial certification audit (Vanta). ISO 27001 does not name the test, but Annex A 8.8 and 8.29 are most easily evidenced with one; ISO 27001 penetration testing covers what auditors expect.

Can an individual be ISO 27001 certified? No. ISO 27001 certification applies to organizations, per NQA. Lead Auditor and Lead Implementer credentials are personnel certifications, bought separately from your company’s certificate.

Is ISO 27001 certification worth the cost? It is when customers ask for it: enterprise and European buyers often require the certificate in security questionnaires or contracts, and one certificate answers many questionnaires. If no buyer asks, compare it with a SOC 2 report in ISO 27001 vs SOC 2 before committing to the three-year cycle.

The short version

ISO 27001 certification costs most organizations $10,000 to $75,000 or more over the three-year cycle (Drata), though Vanta’s audit fees alone come to $26,000 to $31,000. The certification body’s fee follows the number of people in your ISMS scope, so the scope statement is your biggest lever. The testing line is the one we price, fixed in writing with a free retest: see ISO 27001 penetration testing and our published prices, or scope your ISO 27001 test for a written number the same day.