ISO 27001 is one of the most requested security certifications in the UK, but pricing is famously opaque. Ask three consultants and you'll get three very different numbers. This guide breaks down what a UK small business realistically pays in 2026, and — just as importantly — where that money actually goes.
The key thing to understand up front is that the certificate itself is only a fraction of the total. The real cost sits in preparation, tooling and internal time.
The certification body audit
This is the fee paid to an accredited certification body to run your Stage 1 and Stage 2 audits and issue the certificate. For a small business of roughly 10 to 50 people, this typically lands somewhere between £4,000 and £8,000 for the initial certification, followed by smaller annual surveillance audit fees in years two and three. Pricing scales with headcount, number of sites and scope complexity, so a tightly scoped certification is cheaper than a sprawling one.
Consultancy and preparation
This is where numbers vary most. A hands-on consultant who builds your management system for you can cost anywhere from £8,000 to £25,000 or more, depending on how much they do. At the other end, businesses that self-manage the process using templates and software spend far less — sometimes nothing beyond their tooling and internal time. Most small businesses sit somewhere in the middle, using light-touch guidance where they need it.
Tooling and software
Managing ISO 27001 on spreadsheets is possible but expensive in hidden ways: version chaos, lost evidence and hours of manual chasing before every audit. Dedicated GRC software carries an annual cost, but it usually pays for itself in reduced consultancy hours and dramatically less audit preparation time.
The cost everyone forgets: internal time
The single largest cost for most organisations is rarely on any invoice. It's the time your team spends writing policies, running the risk assessment, gathering evidence and preparing for the audit. Underestimating this is the most common reason ISO 27001 projects overrun on both time and budget.
How SnapGRC keeps the cost down
SnapGRC is built to attack the two most expensive line items: consultancy and internal time. Pre-built control templates and a guided structure reduce your reliance on paid consultants, while centralised evidence collection and control tracking cut the audit-preparation scramble that eats so many hours. For a small business trying to certify without a large budget, that's where the real savings come from.
If you want to estimate your own likely cost, start by scoping tightly and understanding exactly which controls apply — SnapGRC's free ISO 27001 tools make that first step straightforward.
