A realistic estimate for European tech companies — including the line items that don't appear on most proposals but end up on your invoice anyway. Cash costs and internal time.
ISO 27001 Implementation Estimator
01Company Profile
2
The people who will own the ISMS project internally — typically IT, security, or ops staff, not developers. Most Series A startups have 1–3 people in this function.
IT/security staff in EU: €60k–€100k fully loaded. Used to price the opportunity cost of their time on the ISMS project.
02Scope & Security Maturity
15
Cloud services, SaaS tools, and infrastructure components in scope
Cloud-native0.88×
Hybrid1.0×
On-premise1.18×
1Initial
2Developing
3Defined
4Managed
5Optimised
Processes documented; some controls in place but not consistently measured.
Already have one of these? It reduces implementation effort.
SOC 2−10%
NIST CSF−7%
Standardbasic tooling
Using oneVanta / Drata / Sprinto
Manualspreadsheets
Standard security tooling is included in base costs. A compliance platform reduces effort by ~18%; manual evidence collection adds ~30%.
03SOC 2 Specifics
Type II is what enterprise customers actually require. Type I is faster but most prospects will ask for Type II within 18 months — meaning two audits.
✓
Securityrequired
Availability+12%
Confidentiality+10%
Privacy+15%
03Implementation Approach
Advisory partner handles documentation, risk treatment, control implementation, and audit prep. Your team participates but doesn't run it (~2–4 weeks internal time).
BARE market rate: €1,000–€1,500
Auto-set from engineer cost
ISO 27001 · Year 1 estimate
—
Cash costs only. Internal time cost shown below.
Opportunity cost: IT / security staff time
—
—
Effort
—
person-days
Duration
—
weeks
Audit Days
—
ISO 27006
Internal FTE
—
required
Effort by phase
Cost breakdown — Year 1 cash costs
Advisory / consultant fees—
Internal labour cost—
Security tooling awareness + vuln scanning—
Compliance automation platform Vanta / Drata—
Penetration test external, required—
Certification body audit—
Opportunity cost IT/security staff time, not invoiced—
Re-audit risk 40% probability × €8k–€18k—
Realistic Year 1 total—
💡Implementation insights
Year 2 ongoing costs
Surveillance audit—
Security tooling (annual)—
Advisory retainer (ISMS maintenance)—
Annual total—
Figures are indicative, anchored to ISO 27006:2015 audit day tables and European market data (BSI, DNV, Bureau Veritas rates). Actual costs depend on ISMS scope, documentation maturity, and choice of certification body. BARE engagements are fixed-fee — you'll know the number before we start.