Fractional CFO vs Full-Time CFO: Costs, Benefits and When to Hire
For most growing businesses, a fractional CFO delivers the same strategic finance leadership as a full-time hire at a fraction of the cost: our clients typically save 30–50% compared with a full-time CFO. The right choice depends on how many days of senior finance work you genuinely need each week.
There is a point in every growing company when the founder stops being able to run the numbers alone. Cash gets tight despite strong sales. Investors start asking for a five-year model. The board wants KPIs, not a bank balance. Your accountant files on time, but nobody is telling you what to do next.
That is the moment most leadership teams start asking whether they need a CFO. The next question is harder: should you hire one full-time, or bring in a fractional, part-time CFO for a few days a week?
This guide compares the two options on cost, capability and flexibility, with real 2026 figures for the UK and the US, so you can make the call with confidence.
What is a fractional or part-time CFO?
A fractional CFO is an experienced chief financial officer who works with your business part-time, usually one to three days a week, on an ongoing basis. You get board-level finance leadership without the salary, benefits and long notice period of a permanent executive.
The term is often used alongside part-time CFO and outsourced CFO. In practice they describe the same thing: senior finance expertise, sized to what your business needs today and scaled up or down as you grow.
A fractional CFO is not a bookkeeper or an accountant. Bookkeepers record transactions and accountants handle compliance and statutory accounts, which look backwards. A CFO looks forwards, setting the financial strategy, managing cash, building forecasts and leading conversations with investors, lenders and buyers.
For a deeper introduction, read our guide: What Is a Fractional CFO?
Fractional CFO vs full-time CFO: the real cost
A fractional or part-time CFO working two days a week costs about £130,000 a year in the UK, against £173,000–£309,000 for a full-time CFO in year one. In the US the figures are about $173,000 against $296,000–$480,000.
The salary is only the start. A permanent CFO also brings employer taxes, pension contributions, benefits and a recruitment fee. A fractional CFO invoices a day rate, and that day rate is the whole cost.
In the UK (year one)
Full-time CFO: £173,000–£309,000
- Salary: £120,000–£200,000
- Employer National Insurance (15%): £17,000–£29,000
- Pension and benefits: £12,000–£30,000
- Recruitment fee (20–25% of salary): £24,000–£50,000
- Time to start: 3–6 months
Fractional CFO, 2 days a week: £129,600
- Day rate of £1,200 for 9 days a month (108 days a year), and nothing else: no National Insurance, pension, benefits or recruitment fee
- Time to start: often within a week
In the US (year one)
Full-time CFO: $296,000–$480,000
- Salary: $200,000–$300,000
- Payroll taxes, health insurance and 401(k) match (28–35% of salary): $56,000–$105,000
- Recruitment fee (20–25% of salary): $40,000–$75,000
- Time to start: 3–6 months
Fractional CFO, 2 days a week: $172,800
- Day rate of $1,600 for 9 days a month (108 days a year), and nothing else: no payroll taxes, benefits or recruitment fee
- Time to start: often within a week
Fractional figures are based on 9 days a month for two days a week. Need just one day a week? That’s 4 days a month, or £57,600 a year in the UK and $76,800 in the US.
There are softer costs too. A full-time hire usually comes with a three-to-six-month notice period, and a wrong hire at this level can set a business back a year. With a fractional CFO you can change the number of days, or the person, without that risk.
Want the numbers for your business? Try our cost savings calculator.
5 signs your business needs a CFO
If two or more of these sound familiar, it is time to bring in senior finance leadership.
- You are profitable on paper but always short of cash. Revenue is growing, yet payroll week still feels tense.
- You are planning to raise investment. Investors expect a credible model, clean numbers and someone who can defend them.
- The founder is still doing the finance. Every hour the CEO spends in spreadsheets is an hour not spent on customers or the team.
- You have no budget or cash forecast. You cannot say with confidence where the business will be in six months.
- You are expanding, acquiring a business or preparing for sale. Each brings tax, structuring and due diligence questions.
For more on timing, see when should a business hire a CFO.
When a full-time CFO makes more sense
A full-time CFO becomes the better option once your business consistently needs more than three days a week of senior finance leadership. That usually happens when:
- revenue passes roughly £15–20 million ($20–25 million), with a sizeable finance team to lead
- you run several entities across different countries or tax regimes
- you operate in a heavily regulated sector, such as FCA-regulated financial services
- you are preparing for an IPO or managing a constant pipeline of acquisitions
Even then, many businesses start fractional. It gives them senior support straight away, time to define what the permanent role should look like, and a chance to see whether the fractional CFO could step into it. When you are ready, our recruitment service can find your permanent hire. If you need full-time cover for a fixed period, an interim CFO bridges the gap.
How to choose the right fractional or part-time CFO
The best fractional CFO is one who has already solved your next problem in a business like yours. Five questions to ask:
- Have they done this before, at your stage? A CFO who has led a Series A raise or an exit brings a playbook, not a learning curve.
- Do they know your sector? SaaS metrics, property finance and e-commerce margins each have their own language.
- Are they strategic and hands-on? Early-stage businesses need someone who will build the model and also fix the month-end.
- How flexible is the engagement? Look for no long-term lock-in, with the option to add or reduce days as your needs change.
- What will success look like in 90 days? Agree clear outcomes up front, such as an investor-ready model or a weekly cash forecast.
At Hire CFO, we match you with a vetted CFO who has relevant sector experience, usually within a week. You agree the number of days, and there is no long-term contract.
Frequently asked questions
How much does a part-time CFO cost in the UK and US?
In the UK, a fractional or part-time CFO typically costs around £1,200 per day. In the US, expect around $1,600 per day. At one day a week that is about £4,800 or $6,400 a month.
Is a fractional CFO the same as a part-time CFO?
Yes. Both describe an experienced CFO who works with your business for a set number of days rather than full-time. “Outsourced CFO” is also used for the same arrangement.
How quickly can a fractional CFO start?
With Hire CFO, often within a week. A full-time CFO search typically takes three to six months, plus a notice period.
What is the difference between a fractional CFO and an interim CFO?
A fractional CFO works part-time on an ongoing basis. An interim CFO works full-time for a fixed period, for example to cover a departure, lead a transaction or steady the business through a turnaround.
The bottom line
If your business needs strategic finance leadership but not five days a week of it, a fractional or part-time CFO is the smarter choice. You get senior expertise in cash flow, forecasting, fundraising and growth for a fraction of the cost and commitment of a full-time hire, and you can scale up as the business does.
Hire CFO provides experienced fractional and part-time CFOs to businesses across the UK and US, with offices in London, New York and Los Angeles. Tell us what you need, agree the number of days, and we will match you with the right CFO.
Book a free discovery call or get a quote today.
