What a Fractional CFO actually does
A fractional CFO provides strategic financial leadership without the full-time commitment. They typically work 2-3 days per week, focusing on high-impact activities that drive growth and improve financial performance.
Key responsibilities include:
- Strategic financial planning: Multi-year models, scenario planning, unit economics
- Fundraising support: Pitch deck financials, due diligence, investor relations
- Board reporting: Monthly board packs, KPI dashboards, financial narratives
- Cash flow management: 13-week rolling forecasts, working capital optimization
- Financial infrastructure: Systems implementation, team building, process improvement
- M&A support: Buy-side/sell-side transactions, integration planning
Live Fractional CFO Missions
Fractional CFO — Series B FinTech
Fractional CFO — SaaS Scale-up
Fractional CFO — PE Portfolio
Rate Index for Fractional CFOs
UK market rates, Q2 2026
When to hire a Fractional CFO
- Scaling from £2m to £10m revenue
- Preparing for Series A or B funding
- Post-acquisition integration
- International expansion planning
- Turnaround or restructuring
- Exit preparation (2-3 year horizon)
- Maternity/paternity cover
Outside IR35 considerations
Fractional CFO engagements typically qualify as Outside IR35 when properly structured. Key factors supporting Outside IR35 status:
- Multiple concurrent clients (portfolio career)
- Use of own limited company and professional insurance
- Project-based scope with defined deliverables
- No mutuality of obligation beyond agreed days
- Right of substitution (though rarely exercised)
- Financial risk and opportunity for profit/loss
Always conduct proper IR35 assessment using CEST or professional advice. Ensure contracts reflect the genuine working relationship.
What does a fractional CFO do?
A fractional CFO provides senior financial leadership on a part-time basis, typically 1-4 days per week. They handle strategic financial planning, fundraising support, board reporting, cash flow management, and building financial infrastructure for growth.
How much does a fractional CFO cost?
Fractional CFOs in the UK typically charge £950 to £1,600 per day, with a median of £1,250. Rates vary based on company stage, complexity, and specific expertise required. This represents significant savings versus a full-time CFO salary of £150-250k plus benefits.
When should I hire a fractional CFO?
Common triggers include: preparing for Series A/B fundraising, annual revenue reaching £2-10m, needing board-level financial reporting, planning international expansion, or preparing for exit/acquisition.
Is a fractional CFO Outside IR35?
Most fractional CFO arrangements qualify as Outside IR35 due to: working for multiple clients, using own equipment, financial risk, substitution rights, and genuine business-to-business relationships. Always confirm with IR35 assessment.
Fractional CFO vs Finance Director?
A fractional CFO typically brings 15+ years experience including C-suite roles, versus 8-12 years for a Finance Director. CFOs focus on strategy, fundraising, and board engagement, while FDs often handle more operational finance.
How many days per week does a fractional CFO work?
Most fractional CFOs work 2-3 days per week per client. Start-ups often begin with 1-2 days, scaling to 3-4 days during fundraising or rapid growth phases.