Ask ten firms what a fractional CFO costs and you will get ten different answers, most of them vague. "It depends" is true, but it is not useful when you are trying to budget for the next quarter. This post sets out the real ranges, what drives them, and what you should expect for your money.
What a fractional CFO actually is
A fractional CFO is a senior finance leader who works with your business for part of the week or month, rather than full time. You get board-level financial thinking: cash management, forecasting, fundraising support, pricing decisions, without carrying a six-figure salary on your payroll.
It is not a bookkeeper with a better job title, and it is not a consultant who parachutes in for a workshop and disappears. A good fractional CFO sits close to the business, knows the numbers cold, and is in the room (or on the call) when decisions get made. Some businesses want the same depth applied more operationally day to day. That is closer to a fractional finance director, and the line between the two roles often comes down to how hands-on you need someone to be with the finance team itself.
What drives the price
Four things move the number more than anything else.
Experience. A CFO who has taken a company through a raise, a sale, or a major restructure charges more than someone earlier in their career. You are paying for judgement built from having seen things go wrong before, not just qualifications.
Days per month. Most engagements run two to four days a month. A business with a live fundraise or a messy systems migration will need more days than a stable business that just needs monthly reporting kept sharp.
Complexity. Multiple entities, international VAT, complex cap tables, or a board that expects a polished pack every month all add time. Simplicity is cheaper than complexity, which is one more reason to fix your systems early.
Deal work. Supporting a fundraise, a sale, or an acquisition is a different intensity of work to steady-state reporting. Expect higher rates or a separate fee structure when a CFO is running diligence or negotiating terms alongside you. This kind of fundraising and M&A support is usually priced and scoped separately from ongoing retainer work.
The real ranges
Based on current UK market guides for 2025 and 2026, here is what you should expect to see quoted:
- Day rates: typically £600 to £1,500 per day, depending on experience and location.
- Experienced boutique operators: commonly sit at £900 to £1,400 per day. This is where most established, senior fractional CFOs price themselves.
- Monthly retainers: with a typical two to four days a month, most engagements land between £2,000 and £6,000 per month.
If a quote falls well outside these bands, ask why. Cheaper is not automatically worse, but it usually means less experience, fewer days, or a narrower scope than you think you are buying.
Fractional versus full-time: the real comparison
A full-time CFO or FD in the UK typically commands a salary of £120,000 to £180,000 or more, before you add employer's National Insurance, pension contributions, a bonus scheme, and the cost of benefits. Add a six-month search process, recruiter fees that often run to 20% or more of first-year salary, and the risk of a bad hire, and the all-in cost of a full-time senior finance leader climbs well past the headline salary.
Compare that to a monthly retainer of £2,000 to £6,000 for two to four days a month, and the maths becomes straightforward for most growing businesses. You get senior experience without a full-time cost base, and you can flex the days up around a raise or a sale, then back down once things settle.
The trade-off is availability. A fractional CFO is not in the building five days a week. For most founders, that is a fair exchange for the cost saving and the seniority it buys.
What should be included
Price alone tells you little. Before you sign anything, be clear on what is actually in scope. A proper engagement should include:
- A monthly board pack that is genuinely readable, not a 20-page PDF nobody opens.
- A rolling cash flow forecast, updated regularly, not once a quarter.
- Input on the systems and tools behind the modern finance function, so your numbers are fast and trustworthy rather than reconstructed by hand each month.
- Direct access when you need it, not a fixed once-a-month call and radio silence in between.
If any of these are missing from a proposal, ask for them to be added or ask why they are not there.
Questions to ask before you hire
- What exactly is included in the day rate or retainer, and what counts as extra?
- How many days a month, and can that flex up around a raise or a sale?
- What does the reporting pack actually look like? Ask to see a sample.
- What tools and systems do they expect you to have, or will they help you set up?
- Have they done this before at your stage, in your sector, through the event you are heading towards?
Transparency should be the baseline, not the differentiator. If a firm cannot give you a straight answer on price in the first conversation, that tells you something about how the rest of the relationship will run.
Ready to talk numbers for your business specifically? Book a call and we will give you a straight answer, not a brochure.