For most UK scale-ups, fractional finance delivers more strategic value, more flexibility, and a significantly lower cost than building an in-house finance team. Here is how the two models compare, and how to know which one is right for your business.
Running a growing business without strong financial leadership is one of the most common mistakes UK founders make. You reach a point where your bookkeeper cannot give you forward-looking insight, but a full-time CFO feels premature. Fractional finance closes that gap.
A fractional finance model gives your business access to experienced finance professionals on a part-time, retained basis. It is a fast-growing alternative to the traditional in-house team, and for many UK scale-ups, it is simply the smarter choice.
This guide breaks down the key differences, costs, and trade-offs so you can make a confident, informed decision.
What is fractional finance?
Fractional finance is a model where a business engages an external team of finance professionals on a retained, part-time basis. The team typically covers the equivalent of a CFO, financial manager, and analyst, all embedded into the business at a fraction of the cost of full-time employees.
In the UK, fractional finance has grown significantly as a solution for businesses between £1m and £20m in revenue. At this stage, the finance function needs to be more strategic, but a full-time hire is not yet commercially justified.
Finovate Advisory UK, based in Bath, specialises in embedding experienced fractional finance teams into UK businesses. Their model covers everything from commercial strategy and cash flow management to compliance and capital planning.
What is an in-house finance function?
An in-house finance team means directly employing your finance professionals. For large businesses, this makes sense. For scaling businesses, the cost and complexity can be prohibitive.
In the UK, a full-time CFO commands a salary of between £100,000 and £250,000 per year, excluding employer National Insurance contributions, pension, and benefits. Add a financial controller at £60,000 to £90,000, and you are looking at a high fixed cost before the first strategic insight lands.
Beyond salary, there is the recruitment timeline to consider. Finding and onboarding a senior finance professional in the UK typically takes three to six months. During that period, your business continues without the strategic oversight it needs.
In-house vs fractional finance: 5 key differences
These are the five dimensions that matter most when comparing the two models:
1. Cost
A full-time finance team costs £150,000 to £350,000 or more per year in salaries alone. A fractional finance retainer typically costs between £2,000 and £8,000 per month, depending on scope. For businesses in the £1m to £15m revenue range, the savings are substantial.
2. Speed to value
Recruiting an in-house finance team takes months. A fractional finance provider onboards within weeks and brings pre-built frameworks from day one. Finovate Advisory UK backs its retainer with a two-month money-back guarantee: if measurable value is not delivered, you receive a refund.
3. Breadth of expertise
An in-house hire is one person with one profile. A fractional finance team is exactly that: a team. Finovate Advisory UK assigns a CFO-level lead, a financial manager, and analytical support to every engagement. That breadth is almost impossible to replicate with a single hire at the same cost.
4. Flexibility
A full-time hire is a fixed cost. Fractional finance scales with your business. As your revenue grows or a specific project demands more capacity, the engagement scope can increase without the overhead of a new hire. This is particularly valuable for businesses approaching a fundraise, acquisition, or period of rapid growth.
5. Risk
A mis-hire at CFO level is expensive. Recruitment fees, notice periods, and severance can easily cost six figures. With a fractional finance provider, performance is built into the engagement model. Poor results end the relationship cleanly, without the legal or financial complexity of an employment dispute.
The 5C Framework: what you get with Finovate Advisory UK
Finovate Advisory UK uses its proprietary 5C Framework across every client engagement. This framework ensures your finance function is fully covered across five dimensions that actually move the needle:
- Commercials: Identifying your key value drivers and ensuring every financial decision is commercially grounded. From pricing strategy to margin improvement and revenue model design.
- Cash: Providing a forward view of your cash position, mapping your working capital cycle, and helping you make decisions that protect and optimise your liquidity.
- Compliance: Managing the full scope of statutory, tax, and governance requirements so your business is always investment-ready. From HMRC submissions to investor due diligence readiness.
- Capital: Helping you understand and systematically build the value of your business, from structuring and shareholder planning to valuation modelling and capital raising support.
- Cadence: Bringing rhythm and structure to your finance function through clear reports, clear responsibilities, and consistent accountability, so your business runs on information, not instinct.
This framework is not generic consulting. It is a proprietary Finovate methodology, built and refined over more than a decade of working with UK and global scale-ups. Learn more about the Finovate Advisory UK approach on our Fractional Finance page.
When does in-house finance make sense?
Fractional finance is not the right answer for every business. An in-house model makes sense when:
- Your business exceeds £20m to £30m in revenue and requires a full-time, dedicated finance function.
- Regulatory requirements in your sector mandate a directly employed finance director.
- Your business model requires daily, on-site financial oversight at a senior level.
- You have already outgrown a fractional model and need full-time capacity to match your complexity.
For businesses below these thresholds, the trade-offs almost always favour a fractional model. The Institute of Chartered Accountants in England and Wales (ICAEW) notes that a growing number of UK SMEs are adopting fractional and outsourced finance functions as a cost-effective path to professional financial oversight.
The verdict: which model wins for UK scale-ups?
For UK businesses generating between £1m and £15m in revenue, fractional finance consistently outperforms the in-house model on cost, speed, flexibility, and strategic breadth. The in-house model earns its place at higher revenue levels, but below that threshold, the case for fractional finance is difficult to argue against.
The most important outcome is that your finance function stops being a compliance cost and starts being a growth engine. Whichever model achieves that, faster and at the right cost, is the right choice.
Finovate Advisory UK works with UK scale-ups that are ready to make that shift. Their fractional finance retainer covers all five dimensions of the 5C Framework from month one, backed by a money-back guarantee. Contact the team by filling in our contact form to find out if fractional finance is the right fit for your business.