What is a Fractional CISO?
Understanding part-time security leadership for modern businesses
Key Takeaways
- 1Fractional CFOs work 1-3 days per week, providing senior expertise without full-time costs
- 2UK day rates range from £800 to £1500, depending on experience and sector
- 3Typical engagements save 50-70% compared to full-time executive hires
- 4Ideal for startups, scale-ups, and SMEs needing strategic leadership
- 5No employment overhead: no pension, NI, benefits, or notice periods
Fractional CISO Definition
A Fractional CISO (also known as a vCISO or virtual CISO) is an experienced cybersecurity executive who works part-time across multiple organisations. They provide the strategic security leadership of a full-time CISO at a fraction of the cost, typically working 1-3 days per week per client.
What Does a Fractional CISO Do?
Develop and execute cybersecurity strategy
Report to the board and executive team on security posture
Manage compliance programmes (ISO 27001, SOC 2, GDPR)
Lead incident response and business continuity planning
Evaluate and manage security vendors
Build security awareness culture
Assess and mitigate cyber risks
Cost Comparison
Fractional vs Full-Time Executive
Your Potential Savings
£180k+
Time Allocation
How fractional executives spend their time
UK Fractional Executive Day Rates
Compare day rates across C-suite roles
Fractional vs Interim vs Full-Time
Choose the right engagement model
| Aspect | Fractional | Interim | Full-Time |
|---|---|---|---|
| Time Commitment | 1-3 days/week | 4-5 days/week | 5 days/week |
| Duration | Ongoing/flexible | 3-12 months | Permanent |
| Annual Cost | £50-150k | £150-300k | £200-400k+ |
| Best For | SMEs, startups, scale-ups | Crisis, transitions | Large enterprises |
| Flexibility | ★★★ High | ★★☆ Medium | ★☆☆ Low |
Costs are indicative UK market rates. Actual costs vary by role, experience, and sector.
Calculate Your Day Rate
Calculate Your Potential Income
Based on 2.5 days/week x 2 clients x 48 working weeks. CFO UK average day rate: £1000.
BetaThis calculator provides rough estimates for illustration only. Actual rates and salaries vary based on location, experience, industry, and market conditions.
Related Executive Roles
Complementary leadership for your organisation
Frequently Asked Questions
Everything you need to know
A fractional CISO is a part-time Chief Information Security Officer who provides strategic cybersecurity leadership to organisations on a flexible basis, typically 1-3 days per week.
Industry Resources & Authority Links
Related Pages
The Fractional Executive Trend
Industry data on the rise of fractional leadership
of executives who moved to fractional work report higher job satisfaction
Source: Harvard Business Review ↗Platform Stats
Founder's background
📊 CISO Market Snapshot
💰 CISO Day Rates
Based on 2026 market data for UK CISO roles.
