ISO 27001 Certification – Absolutely Everything You Need to Know

In this article we’ll explore what ISO 27001 certification is, why you need it, and how to achieve it.

By achieving ISO 27001 certification, you give your customers the signal that you mean business when it comes to information security, and more importantly, their information security.

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What is ISO 27001?

ISO 27001 is the leading international standard for information security. Simply put, it’s a set of guidelines and best practices required to create and maintain an effective information security management system (ISMS).

An ISMS is a framework of policies, procedures and controls designed to monitor and protect your organisation’s sensitive data.

By implementing an ISMS, you can better protect your information and assets from cyber threats, data breaches, and other security risks.

What is ISO 27001 Certification?

ISO 27001 certification is an independent verification that confirms that your organisation’s ISMS aligns with the ISO 27001 standard. 

An accredited certification body conducts an audit of your organisation’s ISMS. Here, they check whether the correct risk assessments, policies and controls are being implemented and developed. If all requirements are met, your ISO 27001 certificate is issued and your organisation is ready to rock.

By achieving ISO 27001 accreditation, existing and potential clients, partners and stakeholders can see that you are committed to continual improvement by implementing an ISMS that adheres to global best practices.

Mandatory Requirements for ISO 27001 Certification

Before an external ISO 27001 certification audit can happen, here are the requirements that must be in place:

• ISO 27001:2022 Clause 4.1 Understanding The Organisation And Its Context
• ISO 27001:2022 Clause 4.2 Understanding The Needs And Expectations Of Interested Parties
• ISO 27001:2022 Clause 4.3 Determining The Scope Of The Information Security Management System
• ISO 27001:2022 Clause 4.4 Information Security Management System (ISMS)
• ISO 27001:2022 Clause 5.1 Leadership And Commitment
• ISO 27001:2022 Clause 5.2 Information Security Policy
• ISO 27001:2022 Clause 5.3 Organisational Roles, Responsibilities And Authorities
• ISO 27001:2022 Clause 6 Planning
• ISO 27001:2022 Clause 6.1.1 Planning General
• ISO 27001:2022 Clause 6.1.2 Information Security Risk Assessment
• ISO 27001:2022 Clause 6.1.3 Information Security Risk Treatment
• ISO 27001:2022 Clause 6.2 Information Security Objectives And Planning To Achieve Them
• ISO 27001:2022 Clause 7.1 Resources
• ISO 27001:2022 Clause 7.2 Competence
• ISO 27001:2022 Clause 7.3 Awareness
• ISO 27001:2022 Clause 7.4 Communication
• ISO 27001:2022 Clause 7.5.1 Documented Information
• ISO 27001:2022 Clause 7.5.2 Creating And Updating Documented Information
• ISO 27001:2022 Clause 7.5.3 Control Of Documented Information 
• ISO 27001:2022 Clause 8.1 Operational Planning And Control 
• ISO 27001:2022 Clause 8.2 Information Security Risk Assessment
• ISO 27001:2022 Clause 8.3 Information Security Risk Treatment 
• ISO 27001:2022 Clause 9.1 Monitoring, Measurement, Analysis, Evaluation
• ISO 27001:2022 Clause 9.2 Internal Audit 
• ISO 27001:2022 Clause 9.3 Management Reviews
• ISO 27001:2022 Clause 10.1 Continual Improvement
• ISO 27001:2022 Clause 10.2 Non Conformity and Corrective Action

How to get ISO 27001 Certified

The ISO 27001 certification process is notorious for being complicated, expensive and slow. At High Table, we’ve turned this on its head. Our aim is to make ISO 27001 accessible for everyone, and now there’s light at the end of the tunnel.

3 routes to ISO 27001 Certification

There are 3 routes to ISO certification:

1. By following an ISO 27001 toolkit and doing it yourself (10x faster and 30x cheaper)
2. By subscribing to a faceless online ISMS portal (fees, fees and more fees)
3. By hiring a consultant (who will charge the earth to do the job for you)

The ISO 27001 Certification Process Explained

To achieve ISO 27001 certification, there’s a strict process to follow. You’ll need to demonstrate to the auditors that your ISMS is in great shape and fully complies with the standard. You can read more in our previous article, ISO 27001 Certification Process: what to expect and how to prepare

It is summarised here:

1. Identify the information assets that need protection and the processes that need to be included in the Information Security Management System (ISMS).
2. Identify the risks to the information assets and evaluate their impact. This helps to prioritise which risks to address first and what controls to implement.
3. Once the controls have been identified, the organisation needs to implement them. 
4. Conduct internal audits to make sure that the ISMS is operating properly and meets the ISO 27001 standard.
5. Conduct a management review of the ISMS to make sure it’s meeting the organisation’s goals and objectives.
6. An external certification body will perform an audit to determine whether the ISMS meets the ISO 27001 standard. If it does, ISO 27001 certificate granted. Done and dusted.

Accredited ISO 27001 Certification Bodies

All of the certification bodies presented on this list are ISO 27001 accredited certification bodies.

What are Accredited ISO 27001 Certification Bodies?

Accredited ISO 27001 certification bodies are independent third-party organisations that audit your Information Security Management System (ISMS) and issue official ISO/IEC 27001 certificates.

Crucially, to issue a globally recognised certificate, the certification body must be accredited by a national accreditation body that belongs to the International Accreditation Forum (IAF).

What Are ISO 27001 Accreditation Bodies?

While certification bodies are the ones that actually audit businesses and issue ISO 27001 certificates, ISO 27001 Accreditation Bodies are the authoritative, nationally recognised entities that audit and approve the certification bodies themselves.

Accreditation bodies are the answer to the question, who watches the watchers. The auditors of the auditors. They ensure that certification bodies maintain strict standards of competence, integrity, and impartiality.

Accreditation Bodies vs Certification Bodies

Feature / Attribute	Accreditation Body (AB)	Certification Body (CB)
Core Role	Audits and accredits certification bodies (“checkers of the checkers”).	Audits organisations/businesses and issues official ISO 27001 certificates.
Who They Audit	Certification bodies (audit firms and their auditor competence).	Businesses, tech companies, service providers, and institutions.
Primary Goal	Ensures auditors operate impartially, ethically, and to global standards.	Evaluates whether an organisation’s ISMS meets ISO/IEC 27001 requirements.
Governing Standard	ISO/IEC 17011 (Requirements for accreditation bodies).	ISO/IEC 17021-1 & ISO/IEC 27006 (Requirements for audit bodies).
Authority Level	Government-backed or sole designated national authorities.	Independent commercial or non-profit auditing organisations.
Global Oversight	Members of the International Accreditation Forum (IAF).	Accredited by IAF member National Accreditation Bodies.
Real-World Examples	UKAS (UK), ANAB (US), DAkkS (Germany), JAS-ANZ (Aus/NZ).	BSI, NQA, TÜV SÜD, SGS, Bureau Veritas, Schellman, DNV.
Certificate Output	Grants official accreditation status/mark to auditing firms.	Issues the accredited ISO 27001 certificate to your company.

Global ISO 27001 Accreditation Bodies Listed

Accreditation rules vary by country, but most major national bodies belong to the International Accreditation Forum (IAF) to ensure global trust and mutual acceptance.

Accreditation Body	Abbreviation	Country / Region
United Kingdom Accreditation Service	UKAS	United Kingdom
ANSI National Accreditation Board	ANAB	United States
Joint Accreditation System of Australia and New Zealand	JAS-ANZ	Australia & New Zealand
Deutsche Akkreditierungsstelle	DAkkS	Germany
Standards Council of Canada	SCC	Canada
China National Accreditation Service for Conformity Assessment	CNAS	China
Comité Français d’Accréditation	COFRAC	France
National Accreditation Board for Certification Bodies	NABCB	India
Ente Italiano di Accreditamento	ACCREDIA	Italy
Japan Accreditation Board	JAB	Japan
Raad voor Accreditatie	RvA	Netherlands
Entidad Nacional de Acreditación	ENAC	Spain
Singapore Accreditation Council	SAC	Singapore
Korea Accreditation Board	KAB	South Korea
General Coordination for Accreditation	CGCRE / INMETRO	Brazil
South African National Accreditation System	SANAS	South Africa
Swiss Accreditation Service	SAS	Switzerland
Entidad Mexicana de Acreditación	EMA	Mexico
Swedish Board for Accreditation and Conformity Assessment	SWEDAC	Sweden
Turkish Accreditation Agency	TÜRKAK	Turkey
Akkreditierung Austria	AA	Austria
Instituto Português de Acreditação	IPAC	Portugal

How to Check a Certification Bodies Accreditation Status

Verifying whether a Certification Body (CB) is genuinely accredited, or validating an ISO 27001 certificate issued by one, requires looking beyond the marketing copy on a website.

To ensure an auditor is qualified to issue an internationally recognised ISO/IEC 27001 certificate, you must follow the official verification hierarchy: Check the Certificate → Verify the Certification Body → Validate with the National Accreditation Body.

The Step-by-Step Verification Process

Step 1: Examine the Certificate for Required Marks

A valid, accredited ISO 27001 certificate must visually display specific details:

• The Certification Body Logo (e.g., BSI, NQA, TÜV SÜD)
• The Accreditation Body Logo (e.g., UKAS, ANAB, DAkkS)
• The IAF MLA Mark (International Accreditation Forum logo, proving global cross-border validity)
• Certificate Details: A unique certificate number, legal business name, physical address, issue/expiry dates, and the formal Scope of Certification.

Warning Sign: If a certificate only features the auditing company’s private logo without a recognised national accreditation mark (like UKAS or ANAB), it is likely an unaccredited certificate.

Step 2: Search Official Verification Databases

Never rely solely on a PDF printout or a website badge. Use official databases to verify active status:

Option A: Global Verification via IAF CertSearch

The IAF CertSearch database (iafcertsearch.org) is the central worldwide registry managed by the International Accreditation Forum.

• Enter the Company Name or Certificate Number.
• The portal checks in real time whether the certificate exists, whether the issuing Certification Body is accredited, and whether that accreditation body is an active IAF signatory.

Option B: Direct Verification via National Accreditation Bodies

If you want to verify that a specific Certification Body is legally authorised to issue ISO 27001 certificates in a specific region, search the national accreditation body’s official directory.

Step 3: Check the ISO/IEC 27001 Specific Scope

Holding accreditation for general ISO standards (like ISO 9001 Quality Management) does not automatically mean an auditor is accredited to assess Information Security.

When looking up a Certification Body on a national database (such as UKAS or ANAB):

1. Download their official Schedule of Accreditation (a legal PDF listing their approved technical competencies).
2. Look specifically for ISO/IEC 27001 (or ISO/IEC 27006 governing security management systems).
3. Confirm that their accreditation covers your specific industry sector (e.g., Software Development, Financial Services, Data Processing).

Red Flags of Non-Accredited “Certificate Mills”

To protect your business from spending money on a certificate that enterprise procurement teams will reject, look out for these common warning signs:

• Self-Auditing Conflict: A firm claims they can design/write your ISMS policies and conduct the final ISO 27001 certification audit themselves. ISO/IEC 17021-1 strictly forbids accredited bodies from offering implementation consultancy to audit clients.
• Instant Certification: They promise a fast-track certificate in under 7 days without conducting formal, separate Stage 1 (Documentation Review) and Stage 2 (Evidence & Controls Audit) phases.
• No Database Record: Missing IAF or National Accreditation logos on the final PDF, or the issuing body and certificate cannot be matched or validated against IAF CertSearch or national registries like UKAS CertCheck.

Always check an audit firm before you sign a deal. Follow these simple steps to make sure they are real and keep your business safe.

Does Accredited Certification Matter?

When preparing for ISO/IEC 27001, organisations often discover a vast difference in price, effort, and timeframe between different auditing firms. Some providers offer rapid, low-cost “ISO 27001 certificates” in a matter of days, while accredited audit firms require a rigorous, two-stage evaluation process.

The core difference comes down to accreditation. Simply put: Yes, accredited certification matters immensely. Obtaining an unaccredited ISO 27001 certificate often results in wasted budget, rejected enterprise proposals, and a false sense of security.

What Makes a Certificate “Accredited”?

An accredited certificate is issued by a Certification Body (CB) that has been independently evaluated and audited by a recognised national accreditation body (such as UKAS in the UK, ANAB in the US, or DAkkS in Germany).

Because these national bodies belong to the International Accreditation Forum (IAF) and sign the Multilateral Recognition Arrangement (MLA), an accredited ISO 27001 certificate carries universal, global trust across international borders.

Key Reasons Why Accredited ISO 27001 Certification Matters

1. Enterprise Buyers and Procurement Teams Will Inspect It

Major corporate clients, enterprise procurement departments, and government buyers do not accept ISO 27001 certificates at face value. During vendor risk assessments, third-party risk management (TPRM) teams routine check for:

• An official national accreditation mark (such as the UKAS Crown & Tick or ANAB logo).
• An active listing on the global IAF CertSearch database or national registers (like UKAS CertCheck).

If your certificate was issued by an unaccredited provider, enterprise clients will typically reject it and require you to complete extensive security questionnaires or undergo a third-party audit anyway.

2. Universal International Acceptance

Cross-border trade requires trust that translates globally. Thanks to the IAF MLA framework, a single UKAS-accredited or ANAB-accredited ISO 27001 certificate is recognised as equivalent in over 100 countries. An unaccredited certificate issued by a private local entity holds no regulatory or legal standing overseas.

3. Real Security Risk Reduction

ISO 27001 is designed to protect your organisation’s sensitive data, operational resilience, and customer trust. Accredited certification bodies follow strict standards (ISO/IEC 17021-1 and ISO/IEC 27006) to ensure auditors possess genuine information security expertise.

• Accredited Audits: Formally test your controls, interview risk owners, review technical evidence, and challenge your Information Security Management System (ISMS).
• Unaccredited “Cert Mills”: Frequently conduct superficial visual checks without testing technical efficacy, leaving critical vulnerabilities undiscovered.

4. Prevention of Conflicts of Interest

Under international accreditation rules, an accredited body is strictly prohibited from consulting on your ISMS implementation and then auditing you for certification. This strict separation guarantees complete objectivity and impartiality. Unaccredited providers frequently grade their own homework by selling implementation templates or coaching and then certifying their own work.

Comparing Accredited vs. Unaccredited ISO 27001 Certification

Evaluation Factor	Accredited ISO 27001 Certification	Unaccredited / Self-Issued Certificate
Independent Oversight	Overseen by government-backed national bodies (UKAS, ANAB, DAkkS).	None (issued by an independent private entity without oversight).
Enterprise Acceptance	Universally accepted by enterprise procurement & TPRM teams.	Frequently rejected during vendor risk evaluations.
Global Recognition	Recognised worldwide via the IAF Multilateral Recognition Arrangement.	Limited or non-existent outside the issuing entity.
Auditor Competence	Auditors are rigorously vetted, qualified, and peer-reviewed.	Varies widely; no mandatory qualification standards.
Verification Directory	Verifiable on IAF CertSearch and national databases.	Cannot be independently verified on national registries.
Commercial Value	High ROI; opens doors to enterprise deals and RFP requirements.	Low ROI; often requires re-auditing with an accredited body later.

How to Ensure You Are Getting an Accredited Audit

Before signing a contract with an auditing firm or certification body, take these three validation steps:

1. Ask for the Accreditation Mark: Confirm that the final certificate will bear an official IAF-recognised national accreditation mark (e.g., UKAS, ANAB, DAkkS).
2. Verify the Auditor’s Scope: Request their official Schedule of Accreditation to verify they are approved to issue certificates specifically under ISO/IEC 27001.
3. Check Impartiality: Ensure the certification body is not offering to write your policies or build your ISMS framework for you.

ISO 27001 Certification Benefits

Getting ISO 27001 certified doesn’t just benefit your customers, it’s a no-brainer decision for your business, too. Here’s why:

• Can help you win bigger, meatier clients – who doesn’t want that?
• Can help you hold onto existing business
• Many of the ISO 27001 conditions also satisfy GDPR and data protection requirements, which will show regulatory bodies you mean business when it comes to risk management 
• ISO 27001 accreditation will help you build and maintain a sound reputation
• Data breeches are expensive – ISO 27001 will keep you on the right side of the law
• Implementing IS0 27001 will help you streamline your processes

The difference between ISO 27001 certification and compliance

If your organisation is following some or all of the ISO 27001 guidelines, this is known as compliance with the ISO 27001 standard.

If a certification body has audited your ISMS and have deemed it in compliance with the ISO 27001 standard, this is ISO 27001 certification, and this is what leads to bigger and better opportunities for your business.

Why your business needs ISO 27001 certification 

Does your organisation handle personal information, financial data or intellectual property? Then you should implement ISO 27001. If you deal with any kind of confidential information (who doesn’t these days?) getting your ISO 27001 certificate is important.

Big or small, the size of your organisation does not matter when it comes to getting ISO 27001 certified. You could be a one-man-band trying to win a significant client, or a small startup desperate to bid for a lucrative tender, whatever your situation – clients and stakeholders need assurance that their information is safe.

More organisations than ever expect suppliers to be ISO 27001 certified, so, if you’re not, Houston, you may have a problem. ISO 27001 certification is your information security badge of honour. Without it, you’re missing the opportunity to showcase your commitment to protecting your clients’ information, and you could find yourself missing out on business altogether.

Why organisations choose ISO 27001 certified suppliers

ISO 27001 certification is used as part of securing the supply chain and addressing supplier risks. Here’s a list of the reasons organisations say they prefer ISO 27001 certified suppliers:

• ISO 27001 is the recognised and respected standard for information security management
• Confident that their sensitive information and data is protected from security threats
• Confirms the supplier’s commitment to following international best practices
• Saves them time and effort authenticating the supplier’s security procedures
• Can help build trust and with customers and stakeholders
• Minimises the risk of data breaches and cyber attacks
• Offers a competitive edge over suppliers who are not ISO 27001 certified
• Can save on costs due to improved security measures and risk management
• Can create a culture of continuous improvement and ongoing risk assessment

How to prepare your business for ISO 27001 certification

Every organisation is unique with different needs, which affects the level of preparation required. It depends how big your business is, as well as how compliant you are with the ISO 27001 standard to begin with. You can read more in our previous article, ISO 27001 Certification Process: what to expect and how to prepare

Here’s a summary of how to prepare for ISO 27001 certification:

1. Undertake a gap analysis to uncover where you company is failing to meet the standard.
2. Devise an implementation plan that demonstrates how you will address these gaps.
3. Educate your team on the requirements and how you plan to align with the standard.
4. Make sure all ISMS documents are up to date, including policies and procedures.
5. Perform internal audits to give you peace of mind that your ISMS is functioning as it should, and that your staff are up to speed on what is required.
6. Book your certification audit with a certification body

How much does ISO 27001 certification cost?

The cost of getting ISO 27001 certified completely depends on the path you take.

You’ll need to cover two sets of ISO 27001 Certification Cost in the certification process:

1. The cost to implement and run the ISO 27001 ISMS 
2. The cost to book the certification audit 

What you end up paying depends on these factors:

• The size of your business
• How risky you are seen to be
• The UKAS accredited certification body you decide to go with

The question is, do you want to do it yourself, or instruct someone to do it for you? 

You can read the Ultimate Guide to ISO 27001 Certification Cost for a complete breakdown and pricing.

How long does it take to get ISO 27001 certified?

The ISO 27001 certification process is different for every business and takes as long as it takes. As a rough guide, factor in around 3 months: 30 days to implement the information security management system and ISO 27001 itself, plus a further 60 days to implement and evidence the required controls.

Here are some stumbling blocks that can impact the process:

• Your ability to book a certification audit based on their availability
• Your ability to implement and evidence the required ISO 27001 controls

Does ISO 27001 expire?

Once you’ve been accredited, your certification will last three years, but your auditor will expect your ISMS to be continually monitored, maintained and improved. Annual surveillance audits will ensure that your ISMS continues to meet the ISO 27001 standard throughout that time, and, when the three years are up, it’s time for recertification. This process will reassess your ISMS, including Clauses 4-10 and each applicable Annex A control.

How to fast-track your ISO 27001 certification

You’ve reached the exciting bit.

First, ask yourself these questions: 

1. Would you feel comfortable waiting around for months whilst the ISO 27001 consultant you’ve hired to get you certified drags the process out far longer than required?
2. Would you be happy knowing you’re paying way over the odds for the privilege?
3. Would you enjoy wasting months of their time and effort writing soul-destroying documents and policies?

We’re guessing your answers were along the lines of (f*ck) no.

Then this one’s for you.

10 ISO 27001 Certification Myths – Busted!

1. It is Only for Large Enterprises

While large enterprises often benefit significantly from ISO 27001, it’s equally applicable to small and medium-sized businesses (SMBs). The standard provides a framework that can be tailored to fit organisations of all sizes. We have helped organisations with only 1 employee to get certified.

Regardless of size, all organisations face information security risks. ISO 27001 offers a structured approach to identify, assess, and mitigate these risks, helping businesses protect their valuable assets.

2. ISO 27001 Certification Guarantees Complete Security

ISO 27001 is a risk based management system. It establishes a framework for continuous improvement and risk management, but it doesn’t guarantee absolute security. The only thing that it can guarantee is that you know what your information security risks are and that you are managing them, even if that means just accepting them.

3. ISO 27001 is Primarily a Technical Standard

While ISO 27001 does address technical controls, its focus is on the overall management of information security. It requires a holistic approach, encompassing people, processes, and technology. Technology makes up only a third of the annex a controls and less than a fifth of the standard over all.

4. ISO 27001 is Too Expensive

To be fair, it is. At least it can be. The cost of ISO 27001 certification can vary but if you shop around the cost can be reasonable. Doing it yourself with an ISO 27001 toolkit can vastly reduce your costs.

5. ISO 27001 is Only Relevant to Cybersecurity

While cybersecurity is a significant component of ISO 27001, it is not it’s focus as the standard also addresses a broader range of information security risks, including human resources, supplier management, physical security, data privacy, and business continuity.

6. ISO 27001 Certification is a One-Time Requirement

ISO 27001 is an ongoing processes of annual certification and audit based on a core principle of continual improvement. It is far from a one and done approach as organisation’s must continuously monitor their information security landscape and adapt their ISMS accordingly.

7. ISO 27001 Certification is a Quick Process

The process of implementing ISO 27001 can be quick and straightforward. It is a management system that has a standard approach. There are two areas where the standard can take time:

1. Implementing controls to mitigate risks: the annex a controls that mitigate information security risks can take some time to implement if your business maturity is low. This will completely depend on how mature your business operations and technical security implementations are.
2. Getting the certification body to issue the certificate: the process of getting a certification body to issue the ISO 27001 certificate is based on two audits that are 30 days apart and a further 30 days for them to issue the paper. The minimum timeline is therefore going to be 60 days but getting the audits booked in is based on their availability and can take many months. You can expect the process to take around 9 months in time elapsed.

8. ISO 27001 Certification is Only for Organisations with Sensitive Data

While organisations handling highly sensitive data benefit greatly from ISO 27001, it’s also valuable for businesses of all types. Any organisation that wants to protect its information assets can benefit from the standard.

In a competitive market, demonstrating a strong commitment to information security can give businesses a distinct advantage. ISO 27001 certification can signal to customers, partners, and investors that an organisation takes data protection seriously.

9 .ISO 27001 Certification is a Guarantee of Compliance

While ISO 27001 can help organisations comply with various regulations and industry standards, it’s not a direct substitute for specific compliance requirements. Organisations must still assess their individual compliance needs and tailor their ISMS accordingly.

10. It’s essentially a marketing gimmick

Without a doubt, it will give your sales and marketing team a significant edge in winning business and help you stand out from the competition. It is also the case that many people will not do business with you if you do not have it but that said, there operational benefits to having ISO 27001 certification that will ensure you are secure and protecting your customer and employee data.

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