Virtual CFO vs. Full-Time CFO: Which Does Your Business Actually Need?

It’s not about cost — it’s about fit

The virtual vs. full-time CFO decision is usually framed as a cost question. But the real question is: what does your business need right now? A full-time CFO who’s underutilised is worse value than a fractional CFO who’s perfectly calibrated to your stage.

When a virtual CFO is the right choice

A fractional CFO typically suits companies with £500K–£10M in revenue, where the financial complexity is real but doesn’t require five days a week of senior attention. Common triggers include: you’re outgrowing your bookkeeper, you’re preparing for a fundraise, your board wants better reporting, or you need to implement financial systems and processes.

When you need a full-time CFO

A full-time CFO becomes necessary when the business reaches a scale where financial decisions are happening daily and require institutional knowledge. Typically this means £10M+ revenue, 50+ employees, multi-entity structures, or active M&A. At this point, you need someone who is embedded in every strategic conversation, every day.

The cost comparison

A full-time CFO in the UK costs £120K–£200K in salary, plus pension, benefits, and equity. A fractional CFO engagement typically costs £2,500–£8,000 per month. That’s a 60–85% saving. For companies below the £10M threshold, the fractional model delivers equivalent strategic value at a fraction of the investment.

The hybrid path

Many companies start with a fractional CFO and transition to a full-time hire as they scale. The fractional CFO can even help recruit their replacement, ensuring the handover preserves institutional knowledge. This is often the smartest path: get board-level financial leadership now, at a cost that matches your stage, and upgrade when the business demands it.

Making the decision

Ask three questions. First: do I need financial strategy every day, or every week? Second: is my financial complexity driven by scale or by stage? Third: would a £150K salary be better invested in growth? If the answers point to ‘weekly’, ‘stage’, and ‘yes’, a fractional CFO is the right choice.