ISO 27001 Certification Cost Explained

Key Takeaways

• ISO 27001 certification cost is between £5,000 and £50,000
• ISO 27001 certification takes on average 6 months to complete
• The cost is based on your number of employees, complexity and how you implement it

How much does ISO 27001 Certification Cost?

The cost of getting ISO 27001 certification is not a single price but a combination of different expenses, typically ranging from £5,000 to £50,000. The total cost depends on factors like the size of your organisation and how complex its operations are. The entire process usually takes about six months to complete.

A breakdown of ISO 27001 Certification Costs

The total cost can be divided into four main parts:

1. Preparation Costs

Before you start, you’ll need copies of the key documents, which cost around £300. You might also choose to get a professional gap analysis to see what you need to fix, which can add between £3,500 and £10,000 to the cost.

2. Implementation Costs

This is where the biggest cost differences can be found. You can use an ISO 27001 toolkit for about £500. However, hiring a consultant or using a full-service platform could cost up to £40,000. Other costs include training your staff, which can be around £50 per person, and the time your own employees spend on the project, which is often the largest hidden cost.

3. Audit Costs

You will need to pass an official audit. The main certification audit is a two-stage process. Its cost is based on the number of employees, with an average daily rate of £1,250. You also have to conduct internal audits, which can cost anywhere from £3,500 to £10,000.

4. Ongoing Costs

Certification is not a one-time event. You’ll have annual check-ups called surveillance audits, which cost about one-third of the initial certification audit. Every three years, you’ll need a full recertification audit. Other continuous expenses include maintaining your security system with either your own staff or an external company.

The 2025 Changes to ISO 27001 Certification Costs

This is a good time to talk about the 2025 changes to ISO 27001 certification costs. The costs are primarily based on market consultant day rates. In simple terms, the certification body calculate how many days they need to audit you and multiply that by the day rate cost of the consultant that will do the work. The 2025 update to ISO 27001 costs is based on the average day rates and the typical industry average day rates in 2025 are £1,250 per day. An increase of 20% in costs over the 2024 rates.

Factors Affecting ISO 27001 Certification Costs

ISO 27001 certification costs can vary significantly based on several factors. Getting these factors wrong can lead to a rapid and substantial increase in expenses.

1. The Size of Your Organization

The size of your company is a primary factor. The larger your organization, the more a certification body will charge you. This is a simple and straightforward relationship: more employees and more complex systems generally require a more extensive audit. This factor is largely outside your direct control, but you should be prepared for its impact on the cost.

2. The Scope of Your Certification

Defining the scope of your ISO 27001 certification is crucial. You need to clearly specify what is in scope and what is out of scope. A broader scope means more work for your organization to prepare and more areas for the auditor to assess, which directly increases the cost. Spending time to accurately define your scope can help manage these expenses.

3. The Number of Locations

Once you’ve defined your scope, you must consider the number of physical locations included. If multiple sites are part of the certification scope, an auditor will need to visit each one. More locations mean more on-site visits, which leads to higher costs due to travel and time.

4. The Certification Body You Choose

The cost of certification can also depend on the specific certification body you select. Fees can vary between different bodies, and generally, larger, more well-known certification bodies tend to charge more. It’s wise to compare different companies to find one that fits your budget. For a list of reputable options, you can refer to resources on the best ISO 27001 certification companies, the best ISO 27001 certification companies.

ISO 27001 Certification Cost Video

In this video, ISO 27001 Certification Cost Explained Simply, I will explain the cost of ISO 27001 certification in a simple way. I will show you the real costs and what you should expect to pay.

I have found the main expenses tied to getting certified and how to compare prices. By the end of this video, you’ll know what services you need and what a fair price is for your certification.

What is ISO 27001 Certification?

First, let us understand what ISO 27001 certification is. ISO 27001 certification is the requirement of the ISO 27001 standard to be independently audited against your compliance to, and ability to meet the requirements of the ISO 27001 standard. The current version of the ISO 27001 standard is called in full ISO/IEC 27001:2022 Information security, cybersecurity and privacy protection — Information security management systems — Requirements

According to the ISO ‘Certification to ISO/IEC 27001 is one way to demonstrate to stakeholders and customers that you are committed and able to manage information securely and safely.’

It is a two stage process compromised of two separate audits that are typically 30 days apart.

The Stage 1 audit will focus on your information security management system and the Stage 2 audit will focus on the operation of information security processes and controls.

On successfully completing both audits you will be recommended for certification and approximately 30 days later be issued with your ISO 27001 certificate.

ISO 27001 Certification Cost Calculator

An ISO 27001 certificate is a widely recognized standard for information security management. Earning this certificate requires you to pass two audits. The overall cost of certification is determined by the number of days a consultant spends on-site. The next logical question is, “How many days will the consultant audit you so you can estimate the cost?”

How Certification Costs Are Calculated

The number of audit days is usually based on how many employees you have. While it may seem like a simple metric, this is the guidance certification bodies use to calculate costs. This approach is standard across all organizations that offer ISO 27001 certification. The guidance is provided in the ISO/IEC 27006-1:2024 standard, which outlines the requirements for bodies that audit and certify information security management systems.

Below is a table showing the recommended audit days based on an organisation’s size. While daily rates vary by certification body, you can use the average rate of £1,250 to estimate your total costs.

Number of employees	Number of Audit Days	Estimated ISO 27001 Cost
1 -10	5	£6250
11 – 15	6	£7500
16 – 25	7	£8750
26 – 45	8.5	£11250
46 – 65	10	£12500
66 – 85	11	£13750
86 – 125	12	£15000
126 – 175	13	£16250
176 – 275	14	£20625
276 – 425	15	£21875
426 – 625	16.5	£23125
626 – 875	17.5	£24375
876 – 1175	18.5	£25625
1176 – 1550	19.5	£26875
1551 – 2025	21	£28125
2026 – 2675	22	£29375
2676 -3450	23	£30625
3451 – 4350	24	£31875
4351 – 5450	25	£33125
5451 – 6800	26	£34375
6801 – 8500	27	£35625
8501 – 10700	28	£36875

ISO 27001 Cost Breakdown

The total cost of ISO 27001 certification actually includes

• Preparation Costs
• Implementation Costs
• Certifications Costs
• On Going Costs

In the following section we will explore these in a little more detail and breakdown the costs and options.

ISO 27001 Preparation Costs

Getting ready for ISO 27001 involves two key steps. First, you get a copy of the official standard. This document tells you exactly what you need to do. Second, you assess how your current setup compares to the standard. This helps you figure out where you stand.

The initial cost for getting the needed standard documents is typically about £300. However, these costs can rise if you decide to hire a professional to perform a gap analysis and readiness check for you.

Here is a quick look at the preparation costs:

• ISO 27001 preparation costs range from £300 to £10,000.
• The ISO27001:2022 and ISO27002:2022 Standard Documents cost around £300.
• A Gap Analysis (which is optional) can cost between £3,500 and £10,000.

Now, let’s look at those costs in more detail.

ISO27001 and ISO 27002 Standard Documents

You’ll need two documents to set up a system that keeps information secure. ISO 27001 is the document for the management system itself. ISO 27002 gives you the specific controls and instructions to follow.

Understanding the Documents

• ISO 27001: This standard sets out the rules for an Information Security Management System (ISMS). Think of it as a blueprint for managing how your organization handles sensitive information. It helps you assess risks and protect against them. Download ISO 27001
• ISO 27002: This one is like a detailed guidebook. It provides practical advice and examples for the security measures mentioned in ISO 27001. It helps you choose and apply the right security controls, such as access controls, cryptography, and physical security. Download ISO 27002

Gap Analysis

After you determine the standard, you’ll need to figure out how close you are to meeting it. This is where you identify the gaps and the work needed to close them.

You can either hire an ISO 27001 expert to do the gap analysis for you or do it yourself, (How to do an ISO 27001 gap analysis).

ISO 27001 Implementation Costs

The process of creating and putting into effect the policies, procedures, and controls for an information security management system (ISMS) will require both time and money. You’ll either invest your own time to do it yourself or pay someone else to do it for you. This phase involves building and implementing your ISMS.

The costs to implement ISO 27001 can vary widely, from around £500 to £40,000. Here’s a quick look at the typical costs involved:

• ISO 27001 Toolkit (Option 1): This is the most affordable choice, usually costing about £500. It provides you with templates and guides to do the work yourself.
• ISO 27001 Consultant (Option 2): Hiring a consultant is the more expensive route, with costs often reaching £40,000. They will guide you through the entire process.
• ISO 27001 Platform (Option 3): This option also costs around £40,000 and provides software to manage your ISMS implementation.

Other Potential Costs

Besides the main implementation options, you should also consider these additional expenses:

• ISO 27001 Training: This is an optional cost, but it can be very helpful. Training courses might cost around £2,500.
• Staff Training: You need to train your staff on the new security procedures. This can cost about £50 per employee.
• Internal Resources: This cost is hard to predict as it depends on how much of your team’s time is spent on the project.

These costs give you a clearer picture of what to expect when planning your ISO 27001 implementation.

Let me explain the ISO 27001 implementation costs in a little more detail.

The ISO 27001 Toolkit

Creating an Information Security Management System (ISMS) can be expensive and difficult. You can save a lot of money, time, and effort by doing it yourself with a proven ISO 27001 Toolkit. Using a toolkit reduces the overall costs associated with ISO 27001 certification and avoids the high prices of software platforms.

Using a Consultant

Hiring an ISO 27001 consultant is a common and effective way to get certified. Consultants bring their experience and the necessary tools to the job. They are best suited to help you implement information security controls that fit your organisation’s specific needs, risks, and budget. A consultant can assist as much or as little as you need, including sitting in on the certification audit with you.

A typical consultant’s fee is about £20,000, or around £1,250 to £1,500 per day.

Choosing a Platform

ISO 27001 platforms vary in what they can do, but they are usually aimed at larger companies. Their main purpose is to store documents and automate tasks. This is typically the most expensive choice because you will still need an ISO 27001 expert to help you use it effectively.

Training Your Staff

When you implement ISO 27001, you must have someone who is trained or experienced in it. If you are not using a consultant, you should consider official ISO 27001 training. You can choose between ISO 27001 Lead Implementeror ISO 27001 Lead Auditor training to get a certificate of competence.

ISO 27001 requires training for all staff. It is a good idea to include this when you build your management system and create a culture of information security. Many providers offer complete training packages for this purpose.

Internal Costs

The biggest hidden cost you’ll face is the cost of internal resources. In my experience, this is also the most often overlooked cost.

It’s hard to guess the exact cost of your team’s time, but the loss of productivity is often your highest expense. The impact of ISO 27001 affects the whole company and requires changes to daily operations. This means your employees will inevitably spend less time on their main job duties. This represents both a culture change and an operational change for the entire company.

A Comparison of ISO 27001 Implementation Options and Costs

Let me summarise the implementation cost options and compare them for you.

Do It Yourself	Consultant	Employee	Contractor
£500	£5k to £40k	£40k+ per year	£40k to £160k
30 to 90 days duration	6 to 12 months duration	6 to 12 months duration	6 to 12 months duration
Comes with all templates, policies, guides	Comes with all templates, policies, guides	Needs to write all policies	Will write all policies
Track record of delivery and certification	Track record of delivery and certification

ISO 27001 Audit Costs

This guide covers the costs associated with ISO 27001 audits, including both internal and annual certification audits. We’ve previously discussed the total certification cost, but other audits are also necessary.

Summary of Audit Costs

Here is a quick look at the typical expenses:

• Certification Audit: £1,000 – £50,000
• Internal Audit: £3,500 – £10,000
• Stage 1 & 2 Certification Audit: £6,250 – £40,000
• Surveillance Audit: £3,000 – £10,000 per year

The list of the best ISO 27001 certification companies.

Lets’s break down the audit costs in a little more detail so you can understand them.

Internal Audit

An ISO 27001 certification requires internal audits. You must perform at least one complete internal audit before you can go for the official certification audit.

An ISO 27001 audit has two requirements: the person conducting the audit must be independent of the area being audited, and they must be qualified to perform audits. While you can do this yourself with some restrictions, most people prefer to hire outside help.

ISO 27001 Certification Audits

The ISO 27001 certification process includes two separate audits. The cost is based on the number of employees you have. The first audit, known as the Stage 1 audit, is where the auditor reviews your information security management system and all related documents.

The Stage 2 audit is a practical demonstration. You will show the auditor your security controls and provide real examples of how they work.

Once certified, your certificate is valid for three years. However, you’ll need to pass annual surveillance audits to keep it. These audits are a recurring cost that many people don’t consider when budgeting.

ISO 27001 Surveillance Audits

Surveillance audits are the yearly check-ups needed to maintain your ISO 27001 certification. Each year, until your re-certification audit, a certification body will conduct a small audit to ensure that your management system is still working effectively.

The cost of a surveillance audit is typically about a third of the cost of your initial certification audit. This is a mandatory requirement, and if you fail to complete it, your certificate will be revoked.

ISO 27001 Re-certification

Every three years, you’ll go through a full re-certification audit. This audit is exactly like your first one, with the same process and cost. While you can expect the price to be higher due to inflation, the overall process is identical.

Here’s an example of the typical costs:

• Year 1: £6,000 to £12,000
• Year 2 & 3: £2,000 to £5,000 each year

After year three, the process begins again with the re-certification audit, which has the same cost as Year 1.

ISO 27001 On Going Costs

Maintaining ISO 27001 certification involves costs beyond the initial certification fee. ISO 27001 is a management system that requires continuous effort and improvement, which means you should budget for several ongoing expenses.

Staffing Costs

You’ll need to allocate resources to manage your information security system. Your choice of staffing will influence costs:

• Full-time employee: Expect to pay an annual salary ranging from £40,000 to £60,000.
• External consultant: Costs are typically lower, around £12,000 to £36,000 per year.
• Existing staff member: If you use a current employee, you’ll need to pay for their training, which can cost £2,000 to £5,000 per year.

Yearly Audit Costs

To keep your certification, a third-party organization will audit you every year. This is a three-year cycle:

• Years 1 and 2: Budget for audit costs of about 33% of your first-year certification fee.
• Year 3: You’ll have a full audit again, similar to the first one, which will incur the same full cost.

Running the System

Operating your Information Security Management System (ISMS) and its controls has a cost. This could mean hiring new staff or using existing employees’ time, diverting them from their regular duties to perform necessary tasks.

A significant operational cost will be for internal audits. The standard requires you to audit yourself regularly. For this task, you’ll likely need an expert who is independent of the departments being audited. This self-audit requirement is detailed in ISO 27001 Clause 9.2 Internal Audit. You can learn more about how to conduct an internal audit yourself by reading available guides.

Top 5 ISO 27001 Hidden Costs

The following are the hidden costs that people do not consider when implementing ISO 27001

• Annual internal audit costs – the cost of conducting the internal audits and the time staff will need to make available to be audited.
• Annual certification audit costs – the cost of annual certification surveillance audits.
• Recertification audit costs – the cost of recertification every 3 years.
• Internal productivity costs – the costs of changes to the way you work and the time needed by staff to run a management system as well as the time needed to be audited.
• ISO 27001 Costs – if you choose a software platform you will have license and training costs.

Common Errors in ISO 27001 Certification Expenses and How to Avoid Them

Based on my experience, people often make these mistakes regarding the cost of ISO 27001 certification.

1. Lack of Understanding

The most frequent error people make is not knowing what they need and what choices are available. They are often influenced by clever marketing. They believe the hype that the process is difficult when it is, in fact, not. As a result, they accept the high prices that are often mentioned without questioning them.

2. Failing to Compare Prices

Another common mistake is not comparing prices from different providers. A certification that is accredited is an accredited certification, regardless of who provides it. While you might believe the hype that these organisations are not profit-driven, they are. The truth is that costs can vary significantly. You should do your research and obtain at least three quotes. Select the ISO 27001 Certification Body that best fits your financial needs, values, and requirements.

How to reduce your ISO 27001 Certification Costs

I specialise in helping people do ISO 27001 themselves and having helped over 5,000 organisations get ISO 27001 certified, these are my expert tips for reducing costs:

• Get the scope right: focus the scope of the ISO 27001 certification on the thing that your customer wants to be certified for. Narrow the scope to reduce complexity and cost.
• Do It Yourself: the ISO 27001 standard is a straight forward standard and easy to implement yourself without the need for expensive consultants or software.
• Get a copy of the High Table ISO 27001 Toolkit: all of the documents, training and support you need is available for less than the cost of an entry level iPhone.

ISO 27001 Certification Cost FAQ