Outsourced Financial Controller Services: When Does Your Business Need One?

Many growing businesses reach a point where their finance function is no longer quite good enough.

The bookkeeper keeps the transactions moving. The external accountant handles the year-end accounts and tax. But management accounts may be late, financial controls may need strengthening and the CEO may not have the information needed to make confident commercial decisions.

This is often where an outsourced Financial Controller can make a significant difference.

In this episode, we look at what an outsourced Financial Controller does, when a business needs one and why using a qualified FC on a fractional basis can be an attractive alternative to employing a full-time Financial Controller.

What Is an Outsourced Financial Controller?

There are two different models commonly described as outsourced Financial Controller services.

One is where an accountancy firm effectively takes over part of the finance function, providing services such as bookkeeping, accounts production and tax.

The other is the fractional model.

This involves an experienced ACA, ACCA or CIMA-qualified Financial Controller working directly with the business, typically for one to three days a week.

Accountancy Capital specialises in this second model.

The business gets a genuine Financial Controller rather than simply another bookkeeping service, but only pays for the amount of senior finance expertise it actually needs.

What Does an Outsourced FC Do?

A fractional Financial Controller can take responsibility for many of the same functions as a permanent FC.

That can include:

• Managing the month-end close
• Overseeing management accounts
• Presenting financial information to the CEO or board
• Managing the year-end audit
• Strengthening financial controls
• Reviewing reconciliations
• Overseeing the existing finance team
• Monitoring cash flow and working capital
• Supporting budgets and forecasts
• Dealing with bank or investor information requests
• Providing commercial financial advice

The key difference is that the work is delivered over one, two or three days each week rather than five.

Who Needs an Outsourced Financial Controller?

The businesses that often benefit most are those with revenue of around £2 million to £12 million.

They may already have a bookkeeper or accounts assistant handling transactional finance, but they lack qualified FC-level oversight.

There are several common triggers.

The business has grown beyond the capabilities of the existing bookkeeper.

Management accounts are consistently late or unreliable.

The external accountant has suggested that the company needs stronger internal financial management.

A bank or investor is requesting more sophisticated financial information.

The company is preparing for a fundraising, acquisition or sale.

Or the CEO simply needs someone who can take ownership of the finance function.

In these situations, employing a full-time FC may not yet be justified.

That is where the fractional model becomes particularly useful.

Outsourced FC Versus a Permanent FC

A full-time Financial Controller is a major commitment.

According to Accountancy Capital's current 2026 figures, a London permanent FC can have a total employment cost of approximately £105,000–£147,000 in the first year, including salary, employer costs, benefits and recruitment.

A two-day-per-week fractional FC is estimated at approximately £47,000–£83,000 in the first year, including recruitment.

From the second year onwards, the estimated fractional cost is approximately £39,000–£68,000 compared with £93,000–£125,000 for a permanent FC.

The important point is that the fractional model is not simply about paying less.

It is about matching the amount of FC-level work to the actual needs of the business.

If the business genuinely needs one or two days of senior financial management each week, employing someone for five days may be unnecessary.

Outsourced FC Versus a Bookkeeper

This is one of the most important distinctions.

A bookkeeper is responsible for recording financial transactions and keeping the accounting records up to date.

A Financial Controller is responsible for the quality and control of the finance function.

If the CEO cannot rely on the monthly management accounts, the balance sheet contains unresolved issues, the audit is becoming difficult or financial information is not available when needed, the business may have outgrown its existing structure.

The answer is not necessarily to replace the bookkeeper.

The bookkeeper can continue doing the transactional work.

The outsourced FC provides the senior oversight.

That can create a much stronger finance function without immediately building a large permanent team.

What Makes a Good Fractional FC?

The person matters enormously.

A fractional Financial Controller should have genuine FC experience and be capable of becoming productive quickly.

They need to understand the business, identify weaknesses in the finance function and improve the quality of financial information without requiring months of training.

There is also an important distinction between a professional who has deliberately chosen a fractional career and a permanent FC who is temporarily accepting part-time work while searching for another full-time position.

An experienced fractional professional is used to working efficiently across different businesses and bringing lessons from one environment into another.

Accountancy Capital specifically focuses on qualified professionals who have chosen the fractional or portfolio model.

How Many Days Do You Need?

One day per week may be enough for a relatively straightforward business with an established bookkeeper.

Two days can provide considerably more capacity for management accounts, controls, audit management and commercial support.

Three days may be appropriate where the finance function is more complex or the company is undergoing significant change.

The objective is not to buy as many days as possible.

It is to determine how much senior financial management the business genuinely requires.

What Should Be in the Brief?

A good outsourced FC brief should explain:

• The size and sector of the business
• Current finance team
• What the bookkeeper or accountant currently handles
• Accounting system, such as Xero, Sage, QuickBooks or NetSuite
• Number of days required
• Required month-end timetable
• Specific areas where the finance function needs improvement
• Budget for the engagement

This allows the recruiter to identify someone whose experience matches the actual requirement rather than simply finding an accountant who is available.

Why Accountancy Capital?

Accountancy Capital places outsourced and fractional Financial Controllers across the UK.

Its network includes ACA, ACCA and CIMA-qualified professionals with proven FC experience.

Candidates are matched according to factors including business size, sector, ownership structure, accounting system and the specific responsibilities required.

The objective is to find a Financial Controller who can contribute immediately and provide the level of financial oversight the business actually needs.

Find Out More

If your business has outgrown its bookkeeper, is not getting enough financial management from its current arrangements or needs stronger controls without committing to a full-time FC, an outsourced Financial Controller could be the right solution.

Find out more about Accountancy Capital's outsourced Financial Controller services:

https://www.accountancycapital.co.uk/outsourced-financial-controller-services/

Final Thoughts

The decision to use an outsourced Financial Controller is really about getting the right level of expertise at the right stage of business growth.

You may not need a full-time Financial Controller.

But you may have reached the point where a bookkeeper and external accountant are no longer enough.

A fractional FC can sit between those two levels, providing qualified financial management, reliable management accounts, stronger controls and senior financial oversight for one, two or three days a week.

For a growing business, that can be a highly practical way to strengthen the finance function without taking on the cost and commitment of a permanent appointment.

And when the business eventually reaches the point where it genuinely needs a full-time Financial Controller, it can make that appointment from a much stronger financial and organisational position.