What Is a Fractional CFO? What They Do and What It Costs

A fractional CFO is a senior finance executive who runs your financial strategy part-time, usually one to three days a week, on a retainer or a defined project. You get someone who has held the role before, without the salary, equity and onboarding of a permanent hire.

That part is easy to say. The harder question is what they actually do once they are engaged.

The honest answer is that it depends on your business, your stage, and what is keeping you up at night financially. There are patterns, though, in how fractional CFOs work, what they focus on, and the outcomes they deliver.

This guide breaks down the day-to-day reality of working with a fractional CFO, the deliverables you should expect, what the role costs in Australia, the US and the UK, and how it differs from a bookkeeper, an accountant, or a full-time finance hire.

What a Fractional CFO Actually Owns

At its simplest, a fractional CFO owns the financial function of your business without sitting in your office five days a week.

Owning the financial function is a vague phrase, so here is what it looks like in practice.

Strategic Financial Planning

A fractional CFO builds the financial roadmap for your business. That means annual budgets, multi-year forecasts, and scenario planning that shows what happens if revenue grows faster or slower than expected.

They work with you to understand your business model, unit economics and growth assumptions, then stress-test whether your plans are financially viable.

This is different from what your accountant does. Your accountant tells you what happened last quarter. Your fractional CFO tells you what is likely to happen next quarter and what you need to do about it now.

Cash Flow Management and Forecasting

Cash flow kills more businesses than bad ideas do. A fractional CFO monitors your runway, predicts cash shortfalls before they happen, and helps you decide when to spend, when to hold, and when to raise.

They build rolling 13-week cash flow forecasts that show exactly when money comes in and goes out. It is the tool that tells you whether you can hire that next person, sign that lease, or wait another month.

Good fractional CFOs also find working capital improvements. Can you negotiate better payment terms? Are customers paying on time? Is inventory tying up cash unnecessarily? They find the levers that free up capital without cutting into growth.

Financial Reporting and KPI Development

Most founders look at profit and loss statements and bank balances. Fractional CFOs build reporting frameworks that drive decisions.

That includes monthly management accounts designed for operators rather than tax compliance. They identify the five to ten metrics that matter most for your business model and create dashboards that track them consistently.

For businesses with boards or investors, they prepare investor reports, board packs and quarterly updates that communicate financial performance in a way that builds confidence and keeps everyone aligned.

They also establish the rhythm. Monthly closes happen on time. Variance analysis explains why actual results differ from budget. Nothing gets swept under the rug.

Fundraising and Investor Relations

If you are raising capital, a fractional CFO becomes indispensable. They build the financial components of your pitch deck, create detailed models that investors will interrogate, and prepare you for due diligence.

The work is understanding what investors look for at different stages, how to position your unit economics, and what questions will come up in every meeting.

During due diligence, they manage the data room, respond to investor queries, and make sure your financial records can withstand scrutiny. After the round closes, they often stay involved in investor reporting and board management.

Even outside an active raise, a fractional CFO can keep your business fundraise-ready with clean books, clear metrics and a coherent financial narrative.

Systems, Processes and Team Building

As businesses grow, spreadsheets break. A fractional CFO implements the systems and processes that let you scale without chaos.

That might mean selecting and implementing accounting software, building approval workflows, or creating financial policies around expenses, procurement and revenue recognition.

They also build or manage your finance team. That could involve hiring a bookkeeper, training an existing team member, or scoping what a full-time finance hire should look like when you are ready for one.

The goal is a finance function that keeps working when the fractional CFO is not there. They build infrastructure the business keeps.

What a Fractional CFO Does Not Do

It helps to understand what sits outside the scope of a typical engagement.

Most fractional CFOs do not do bookkeeping. They will not be processing invoices, reconciling bank statements or entering transactions into your accounting system. They oversee that work and make sure it is done correctly, but the data entry itself usually sits with a bookkeeper or finance administrator.

They are also not tax accountants. They will work closely with your tax adviser and make sure your financial structure supports tax efficiency, but they are not preparing your BAS, VAT or sales tax returns, or lodging your company return.

Fractional CFOs generally stay out of operational minutiae unless there is a strategic reason. They are not approving every purchase order or managing supplier relationships day to day. Their focus is decision support and financial strategy.

Understanding these boundaries sets realistic expectations and makes sure you have the right supporting functions in place.

How Fractional CFO Engagements Are Structured

Most engagements fall into one of three models, each suited to different needs.

Ongoing Retainer

The most common structure. The fractional CFO works a set number of days per month, typically one to three, on an ongoing basis. They attend leadership meetings, manage the monthly close, and act as a continuous strategic partner.

This suits businesses that need consistent financial leadership but cannot justify a full-time hire. It gives you continuity, relationship depth, and someone genuinely embedded in the business.

Pricing depends on the CFO's experience, your business complexity and the time commitment. The ranges for each market are set out in the cost section below, and current day rates by role are in our fractional executive rates guide.

Project-Based Engagements

Some businesses need a fractional CFO for a specific initiative rather than ongoing support. That might be preparing for a raise, implementing new financial systems, or cleaning up historical financials.

Project engagements have defined scope, timeline and deliverables. They are often more intensive upfront, perhaps two to three days per week for eight to twelve weeks, then step down or conclude entirely.

This model suits businesses with capable internal finance teams who need expert support for something beyond their current capability.

Hybrid Arrangements

Many engagements start as projects then transition to retainers, or move between higher and lower intensity depending on business cycles.

A fractional CFO might work three days per week leading up to a fundraise, then drop to one day per week for ongoing financial management after the round closes.

Flexibility is one of the advantages of the model. The structure should serve your needs rather than force you into a rigid arrangement.

What a Fractional CFO Costs in Australia, the US and the UK

Fractional CFO retainers vary by market, by the number of days engaged, and by how complex the business is. Multiple entities, international operations and regulated industries all add scope, and scope adds days.

Australia: $8,000 to $20,000 AUD per month, from roughly one day a week at the lower end to three days a week at the top. A full-time CFO costs $280,000 to $340,000 AUD a year once salary, superannuation, payroll tax and workspace are counted. The full breakdown is in our Australian fractional vs full-time CFO comparison.

United States: $8,000 to $18,000 USD per month. A full-time CFO costs $320,000 to $540,000+ USD a year in true employer cost once FICA, health insurance and 401(k) matching are added. See the US cost guide for the detail.

United Kingdom: £5,000 to £14,000 GBP per month. A full-time CFO costs £280,000 to £420,000+ GBP a year once employer National Insurance, pension contributions and on-costs are included. The UK fractional vs full-time CFO comparison walks through the numbers.

In every market, the retainer is usually the whole cost. A fractional CFO engages as a contractor, so there is no leave liability, no recruitment fee and no redundancy exposure on top.

Deliverables You Should Expect

Whatever the structure, clear deliverables make these engagements work. Here is what you should typically receive.

First 30 Days

A good fractional CFO spends their first month in diagnostic mode. They will review your current financial position, assess your systems and processes, meet the leadership team, and identify the biggest risks and opportunities.

You should receive a financial health assessment that outlines where you stand, what is working, what is not, and a prioritised roadmap for the next six to twelve months. This becomes your mutual agreement on what matters most.

They will also establish quick wins. That might mean fixing a glaring reporting gap, renegotiating a supplier contract, or identifying an immediate cash flow issue that needs attention.

Monthly Deliverables

Once established, expect a regular cadence of outputs. Monthly management accounts covering profit and loss, balance sheet and cash flow statement, delivered within ten working days of month-end, with commentary that explains the story behind the numbers.

A cash flow forecast that extends at least 90 days forward and is updated monthly. A KPI dashboard tracking your critical metrics with trend analysis and variance explanations.

You should also have regular strategic conversations. Whether that is a monthly meeting, participation in leadership discussions, or ad-hoc access, the relationship needs communication channels beyond delivering reports.

Quarterly and Annual Deliverables

Quarterly board reports if you have a board or investors. These synthesise financial performance, progress against plan, and the decisions or concerns that need board input.

Annual budgets and strategic plans, typically built collaboratively in Q4 for the following year, tying financial plans to strategic goals with assumptions documented.

Many fractional CFOs also run quarterly business reviews that step back from month-to-month detail and assess whether you are on track strategically, whether your business model assumptions still hold, and what needs to change.

Fractional CFO vs Other Financial Roles

Confusion arises because several roles touch financial matters. Here is how a fractional CFO fits into the wider picture.

A bookkeeper records transactions, reconciles accounts, and manages accounts payable and receivable. Essential work, though it looks backwards and focuses on compliance and process.

An accountant prepares financial statements, lodges tax returns, and ensures compliance with accounting standards and tax law. They typically engage quarterly or annually and focus on historical accuracy and regulatory requirements.

A fractional CFO is forward-looking and strategic. They use the data that bookkeepers record and accountants validate to drive business decisions, plan for growth, and manage financial risk.

These roles complement each other. A well-functioning finance stack might include a part-time bookkeeper, an external accounting firm for tax and compliance, and a fractional CFO for strategic leadership. That combination often costs less than one full-time CFO salary while covering all bases.

If you are weighing full-time against fractional, ask yourself whether you have 40+ hours per week of strategic CFO work. Pre-Series B, usually not.

When a Fractional CFO Adds the Most Value

Fractional CFOs are not right for every business at every stage. Here is when they typically deliver outsized impact.

Scaling Through Growth Stages

You have found product-market fit and revenue is growing, but financial systems have not kept pace. Decisions are being made on instinct rather than data. Cash flow feels unpredictable. This is the classic inflection point.

They build the financial infrastructure that lets you scale confidently. Companies that navigate the $2M to $10M revenue journey successfully almost always have strong financial leadership, fractional or otherwise.

Preparing for Fundraising

Investors will dissect your financials. A fractional CFO makes sure you can withstand that scrutiny while building the financial narrative that supports your valuation and growth story.

They also help you work out how much to raise, what milestones that capital needs to achieve, and how to structure the round. These are not questions you want to figure out mid-process.

Navigating Financial Complexity

As businesses mature, financial complexity increases. You might be managing multiple entities, international transactions, complex revenue models or inventory. A fractional CFO brings experience with these scenarios and implements proper controls and reporting.

They also matter during difficult periods. If you are managing a turnaround, navigating a cash crunch, or restructuring operations, experienced financial leadership can be the difference between survival and closure.

Building Towards Exit

If you are two to three years from a potential exit, a fractional CFO helps position the business for maximum value. That means cleaning up cap tables, implementing robust financial controls, and building the quality of earnings buyers expect.

Many successful exits involved a fractional CFO who spent 18 to 24 months getting the business deal-ready well before any formal process began.

How to Choose a Fractional CFO

Look for relevant industry experience, strong references from similar-stage businesses, and the ability to explain complex financial concepts in plain language.

Questions Worth Asking

• How many companies at our stage have you worked with?
• What does your typical engagement structure look like?
• How do you measure success?
• Can you provide client references?
• What systems do you recommend, and why?

In early conversations, a strong candidate should ask as many questions as they answer. Anyone prescriptive before understanding your business is a red flag.

Frequently Asked Questions

How much does a fractional CFO cost?

Retainers typically run $8,000 to $20,000 AUD per month in Australia, $8,000 to $18,000 USD in the US, and £5,000 to £14,000 GBP in the UK, depending on days engaged, experience and complexity. A full-time CFO costs $280,000 to $340,000 AUD, $320,000 to $540,000+ USD, or £280,000 to £420,000+ GBP a year once on-costs are included, so a one-day-a-week engagement typically costs under half the full-time figure in all three markets.

How many days per week does a fractional CFO typically work?

Most engagements range from one to three days per week, or four to twelve days per month. Early-stage businesses might need only one day per week, while scale-ups preparing for fundraising might need three. The commitment flexes with your needs.

What size business needs a fractional CFO?

Typically businesses between $1M and $20M in revenue get the most value. Below $1M, a good bookkeeper and accountant often suffice. Above $20M, you are usually ready for a full-time CFO. Treat these as rough guidelines. Complexity matters more than revenue.

How is a fractional CFO different from a financial consultant?

Fractional CFOs are embedded in your business as part of the leadership team and carry ongoing responsibility for outcomes. Consultants typically deliver a report and move on. A fractional CFO owns the financial function and is accountable for results.

Can a fractional CFO help with fundraising?

Yes. Fundraising preparation and support is one of the most common reasons businesses engage one. They build financial models, prepare due diligence materials, support investor presentations, and often participate in negotiations and term sheet discussions.

What is the typical length of a fractional CFO engagement?

Ongoing engagements often last 18 to 36 months, and many continue longer. Project-based work might be two to six months. The relationship typically evolves as your needs change, and the best fractional CFOs help you plan for what comes next, whether that is transitioning to full-time or building internal capability.

Do I still need a bookkeeper if I have a fractional CFO?

Yes. Fractional CFOs do not typically do bookkeeping work, and they rely on accurate bookkeeping to provide strategic guidance. The bookkeeper records what happened. The fractional CFO explains what it means and what to do about it.

How do I know if a fractional CFO is any good?

Look for relevant industry experience, strong references from similar-stage businesses, and the ability to explain complex financial concepts in plain language. In your first conversations they should ask as many questions as they answer. The best fractional CFOs are business partners who happen to specialise in finance.

Hiring a Fractional CFO

Fractionus connects businesses with vetted fractional CFOs who own strategy, cash and capital from day one. No recruitment fees, no agency markups.

Book a call and meet a shortlist in days.