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How to Build a Risk Register: A Practical Guide for SMEs

A risk register is the foundation of any security programme. Here's how to build one that's practical, useful, and doesn't end up as a spreadsheet nobody opens.

Every cybersecurity framework — ISO 27001, NIST CSF, NIS2, DORA — requires a risk management process at its core. But for most Irish SMEs, "risk management" sounds like something that belongs in a large corporate with a dedicated risk team.

It doesn't. A practical risk register can be built in a day, maintained in hours per quarter, and gives you a clear, defensible picture of your security exposure. Here's how to do it.

What a Risk Register Actually Is

A risk register is a structured document (or tool) that records:

  • The risks your organisation has identified
  • The likelihood and potential impact of each risk
  • Your current controls and how effective they are
  • Your residual risk after controls are applied
  • Your decision on how to treat each risk
  • Who owns each risk and when it was last reviewed

That's it. The sophistication can vary enormously — from a well-structured spreadsheet to a dedicated GRC platform — but those are the core elements.

Step 1: Define Your Scope

Before identifying risks, decide what you're protecting. Your information assets. At minimum, this includes:

  • Data: customer records, financial data, employee records, intellectual property
  • Systems: servers, cloud services, SaaS applications, endpoint devices
  • Processes: how data is handled, who has access, how it flows between systems
  • Third parties: suppliers and partners who access or process your data

You don't need a perfect asset inventory before starting a risk register — but having a rough list helps you think about what could go wrong and to whom.

Step 2: Identify Your Risks

Work through your assets and ask: what could go wrong? Common categories for Irish SMEs:

External threats: - Phishing attacks leading to credential theft - Ransomware encrypting business data - Business Email Compromise (BEC) / payment fraud - Exploitation of known vulnerabilities in internet-facing systems - DDoS attacks disrupting services

Internal threats: - Accidental data leakage (emailing the wrong person, misconfigured cloud storage) - Insider misuse of access rights - Unintentional policy violations (using personal devices, shadow IT)

Process and compliance risks: - Failure to meet GDPR breach notification obligations - Inability to recover from a ransomware incident within acceptable timeframes - Supplier security failure impacting your data

Physical risks: - Theft of devices - Unauthorised physical access to systems

Don't try to identify every possible risk. Focus on what's realistic given your business, your sector, and your threat landscape.

Step 3: Score Your Risks

For each risk, assign:

Likelihood: How probable is this risk materialising in the next 12 months? - 1 = Rare / 2 = Unlikely / 3 = Possible / 4 = Likely / 5 = Almost certain

Impact: If it happened, how bad would it be? - 1 = Negligible / 2 = Minor / 3 = Moderate / 4 = Major / 5 = Critical

Inherent risk score = Likelihood × Impact (1–25)

Then document your existing controls for each risk and re-score:

Residual risk score = Likelihood × Impact after controls

This gives you a heatmap of where your programme needs to focus.

Step 4: Decide How to Treat Each Risk

For each risk, you have four options:

  • Treat (mitigate): Implement or improve controls to reduce the risk
  • Tolerate (accept): The residual risk is within your appetite — no further action required
  • Transfer: Shift the financial impact via cyber insurance or contractual liability
  • Terminate (avoid): Stop the activity that creates the risk

Every risk needs a documented treatment decision and an owner. "We'll look at it" isn't a treatment.

Step 5: Keep It Live

A risk register that's updated once and never touched is a compliance artifact, not a management tool.

Build in: - Quarterly review: Rescore risks, update control status, check treatment plans - Event-triggered review: After an incident, a significant change, or a new regulation - Annual reset: Full re-identification exercise to catch emerging risks

Assign a risk owner for each entry — the person accountable for ensuring the treatment plan is followed.

Common Mistakes to Avoid

  • Too many risks: A 200-row risk register is unmanageable. Focus on your top 20–30 risks to start
  • No owners: Every risk needs a named owner, not "the IT team"
  • No treatment plans: Identifying a risk without a treatment decision is just a list of worries
  • Scores that never change: If your residual risk scores haven't moved in 12 months, your programme isn't progressing
  • Board-inaccessible format: Your risk register should be summarisable for a non-technical board in 5 minutes

Using Shield IQ to Manage Your Risk Register

Shield IQ's risk module uses a 5×5 grid with qualitative scoring and FAIR-lite quantitative loss expectancy for high-priority risks. Treatment plans are tracked on a Kanban board, risks are linked to controls and assets, and the dashboard gives you a board-ready summary.

You can import your existing risks in bulk — no 200-row manual entry — and the AI from your compliance assessment automatically suggests risks based on your assessment responses.

Build your risk register at app.shieldiqcyber.com — free to start.

No credit card. No setup. Up and running in minutes.