Fractional vs in house FD
Choosing the right financial leadership is a critical decision for any growing business.
As financial complexity increases, standard annual tax returns and basic accounting may no longer suffice to provide the direction and insight needed to make strategic choices.
At this point, business owners often find themselves weighing up two options: hiring a fractional FD or recruiting a full time in house FD.
Understanding the differences between these two options in terms of cost, time commitment, and operational impact helps determine which aligns best with your business goals.
Costs
Financial investment is often the primary factor to consider when choosing between a Fractional FD and an in house FD. Comparing salary costs and other employment expenses highlights the financial implications of both options.
In house FD expenses
A permanent, full time Finance Director requires an annual salary, often ranging from £90,000 to over £150,000 depending on location and experience. Beyond the salary, overheads can accumulate due to employment liabilities such as:
15% Employer National Insurance contributions
Workplace pension contributions
Performance bonuses and equity options
Benefits packages such as private healthcare and company vehicles
Recruitment agency fees, which typically cost between 15% and 20% of the first year's salary
These additional expenses can easily increase the expenditure by 30% or more, creating a large, fixed overhead on the monthly profit and loss statement.
Fractional FD expenses
A fractional FD works on a part time, retained, or daily basis, allowing businesses to pay purely for the time and expertise needed. Typical retainers range from £1,500 to £4,000 per month, depending on the required scope and days allocated.
Because a fractional FD operates as an external consultant or through a service agreement, there are no statutory benefits, national insurance liabilities, or severance risks involved.
The fractional FD model converts a fixed salary into a flexible operational expense that scales up or down as business requirements change.
Time
Time is another factor that differs significantly between a full time in house FD and a fractional FD. Evaluating how much time the business actually requires prevents paying for unused capacity.
In house FD time efficiency
An in house FD is present every working day and available for spontaneous meetings, immediate decisions, and leadership of the internal finance team.
Small or mid sized businesses often don’t generate 40 hours per week worth of senior, high level strategic work. Consequently, an in house FD may spend significant time managing day to day bookkeeping, chasing invoices, or handling administrative tasks that lower level staff could process at a lower cost.
Fractional FD time efficiency
A fractional FD typically spends between one and four days per month working inside a business. Their allocated time is focused on high value outcomes, such as:
Long term strategic planning and cash flow modelling
Preparing board level reports of key metrics
Setting up robust internal financial systems
Assisting with investment readiness or banking relationships
The strategic focus of a fractional FD remains entirely on driving commercial growth.
Pros and cons of a fractional FD vs an in house FD
In house and fractional FDs both offer advantages depending on organisational maturity, transaction volume and operational complexity.
Pros of an in house FD
Full dedicated attention: 100% of working hours belong to one business, building deep organisational knowledge and cultural alignment.
Immediate availability: Senior advice is available instantly on site for daily operational challenges.
Direct team supervision: Daily line management of bookkeepers and junior accountants.
Cons of an in house FD
High fixed overhead: Permanent salaries create heavy commitments that persist even during revenue downturns.
Single perspective: An employee's exposure is limited to one company, which can narrow perspective compared to active external consultants.
Single person dependency: Operational momentum risks stalling if the full time hire takes leave or resigns.
Pros of a fractional FD
Cost effective strategic insight: Access to senior expertise without committing to an executive salary package.
Broad industry experience: Fractional professionals work across multiple sectors simultaneously, bringing fresh insights, modern software recommendations, and best practices.
Flexibility: Work scope can scale up during major projects like a fundraising or system migration, then scale back down during quieter periods.
Reduced recruitment risk: If the arrangement does not deliver results, notice periods are short, and there are no employment tribunal risks.
Cons of a fractional FD
Limited presence: A fractional FD is not sitting in the office every day to tackle sudden operational challenges immediately.
Divided attention: Because fractional professionals serve multiple clients, scheduling urgent meetings outside agreed days requires forward planning.
Choosing between a fractional FD and an in house FD
Deciding between these two finance leadership structures comes down to company turnover, complexity, and growth stage.
When to choose an in house FD
Recruit an in house FD when transaction volume and operational scale demand constant, full time management.
If a business manages multiple entities, complex international trade, or large internal departments needing daily executive direction, the continuous presence of a permanent hire justifies a full time investment.
When to choose a fractional FD
A fractional FD is ideal if your business generates between £0.5m and £25m in revenue, has an established bookkeeper or team handling transactions and doing basic reporting, but lacks senior oversight to drive profitability.
The fractional FD bridges the gap for companies that need clear financial direction, better margins, and rolling cash flow projections without the corporate overheads.
Need help choosing between an in house and fractional FD?
Choosing between a fractional and in house FD doesn’t have to be complicated.
If your business is ready for strategic financial oversight and growth guidance without executive overheads, contact The FD Consultant to explore how a fractional FD can support your business.
