Full-Time vs. Fractional CFO

Full-Time vs Fractional CFO

The decision between a full-time permanent CFO and a fractional CFO is one of the most consequential financial leadership choices a growing business makes. Get it right and the business gets the CFO capability it needs at the right cost for its stage. Get it wrong and either the business pays for a permanent CFO before it can fully utilise one, or it runs without the financial leadership it needs at a critical growth point. Adrian Lawrence FCA, founder of FD Capital and a Fellow of the ICAEW, has placed both fractional and permanent CFOs for UK businesses since 2018 and sets out the framework below for making this decision well.

Call 020 3287 9501 to discuss your specific situation, or see our related guides: Outsourced vs Full-Time CFO | Fractional vs Part-Time vs Interim | Full-Time vs Fractional FD

The Core Distinction

A full-time permanent CFO is employed exclusively by one business, available every working day, building deep institutional knowledge and relationships over time, and accountable for the full range of finance function leadership. The annual cost of a full-time CFO in the UK ranges from £120,000 to £200,000+ in base salary, with employer’s National Insurance contributions, pension, bonus and benefits typically adding 30–40% to the total employment cost. For a CFO at £150,000 base, the true annual cost to the business is typically £195,000–£215,000.

A fractional CFO works across multiple businesses simultaneously, typically one to three days per week per client, on a day-rate or monthly retainer basis. They bring the same CFO-level experience and capability as a permanent appointment but deploy it across a portfolio of clients rather than dedicating it to a single employer. The monthly cost of a fractional CFO working two days per week for a business is typically £3,500–£6,000 — £42,000–£72,000 per year — at a quality level comparable to a full-time CFO costing twice that amount. For the fractional CFO service and day rate guide see our dedicated page.

When a Full-Time CFO Is the Right Answer

The business needs daily CFO-level involvement

If the business’s finance function requires CFO-level judgement, oversight and leadership every working day — because the volume of commercial decisions is high, the finance team is large, the reporting complexity is significant, or the business is in a rapid growth phase where financial governance is under pressure daily — then a fractional CFO working two days per week will not provide adequate coverage. A useful test: how many hours per week does the current finance leader spend on genuinely CFO-level work (strategic financial decisions, investor relations, board reporting, major commercial calls) versus operational and transactional finance work? If the answer is more than 20 hours per week, the business probably needs a full-time CFO.

The business is preparing for or has recently completed an equity event

Businesses that have recently raised institutional equity, are preparing for a fundraising round, or are PE-backed typically need a permanent CFO. Investors expect a full-time finance leader who is accountable, accessible and embedded in the business rather than dividing their attention across a portfolio of clients. The LP reporting cadence, board meeting preparation, investor relations and management information requirements of an equity-backed business generally justify full-time CFO employment from the point of Series A or PE investment onwards. For businesses in or approaching this stage see our CFO Executive Search service.

Revenue and scale exceed £30–40 million

At revenue above £30–40 million, most businesses have the finance function complexity — multiple legal entities, significant working capital, bank debt, employee headcount and regulatory requirements — to justify a full-time CFO. The finance function at this scale typically requires daily CFO oversight to manage effectively. Businesses at this scale that use a fractional CFO generally do so as a transitional arrangement while recruiting a permanent appointment, not as a long-term model.

The CFO role requires public company or AIM reporting obligations

AIM-listed or Main Market companies have regulatory reporting obligations, corporate governance requirements and investor relations demands that are incompatible with a fractional model. The CFO of a listed company must be available for regulatory announcements at short notice, investor meetings, analyst briefings and board governance activities that cannot be scheduled around a fractional commitment.

When a Fractional CFO Is the Right Answer

Revenue is below £15–20 million and growing

For most businesses below £15–20 million revenue, the daily CFO-level decision volume does not justify a full-time permanent appointment. A fractional CFO working two days per week provides the strategic financial oversight — the monthly board pack, the financial model, the cash forecast, the challenge to the commercial plan — while the operational finance work (management accounts, bookkeeping, VAT, payroll) is handled by an internal Finance Manager or Accountant. This structure delivers the CFO capability the business needs at a fraction of the permanent cost, freeing capital for growth investment.

The business needs CFO-level capability for a specific project or period

A fundraising round, a financial transformation project, a system implementation, an exit preparation process, or a period of particular complexity in the business — all of these create a temporary demand for CFO-level capability that is well-served by a fractional model. The fractional CFO is engaged for the duration of the project, delivers the required output, and the engagement ends when the need does. This is more flexible and cost-effective than hiring a permanent CFO and then managing them through a period when the role’s demands have reduced. See our Exit-Ready CFO page for the exit preparation context.

The business is between permanent CFO appointments

When a permanent CFO leaves and the business is running a search — which typically takes three to five months for a quality permanent appointment — a fractional CFO maintains continuity. The fractional CFO manages the board reporting, investor relations and finance team leadership throughout the search period, ensuring the business arrives at the point of permanent appointment with its financial function intact rather than having operated below capacity for several months. FD Capital handles both the fractional placement and the permanent search from the same brief where required.

The business is testing whether it needs a CFO at all

Some businesses are uncertain whether they have outgrown the Finance Manager or Financial Controller model and need CFO leadership. A fractional CFO engagement of three to six months provides a clear answer — either the fractional model meets the business’s needs and continues, or it becomes clear that the business needs full-time CFO presence and a permanent search begins. Either way, the business has made a well-informed decision rather than guessing.

The Decision Framework

Related CFO and Finance Director Services

Related pages: Fractional CFO | CFO Executive Search | Outsourced CFO | Interim CFO | Part-Time CFO | Outsourced vs Full-Time CFO | Full-Time vs Fractional FD | Fractional vs Part-Time vs Interim