What Is a Fractional CFO and Do You Need One?

A fractional CFO is an experienced Chief Financial Officer who works with your company on a part-time or project basis — typically 10 to 40 hours per month — providing the strategic financial leadership of a full-time executive at a fraction of the cost.

For companies between roughly $1M and $50M in annual revenue, this model often makes more sense than a full-time hire. A full-time CFO commanding $200,000–$400,000 in base salary plus equity is out of reach for most growth-stage businesses. But operating without anyone in that role leaves founders and CEOs making major financial decisions without the analytical infrastructure to support them well.

What a Fractional CFO Actually Does

The scope varies by engagement, but most fractional CFOs cover: financial modeling and scenario planning (what does the business look like at different growth rates, with or without a new hire, post-fundraise?), cash flow forecasting and management, preparation for a fundraise or acquisition (building the data room, preparing financial narratives, coaching founders on investor questions), KPI dashboard design and implementation, pricing strategy analysis, chart of accounts and financial systems setup, and coordination between the bookkeeper, CPA, and leadership team.

What they do not do: day-to-day bookkeeping (that is the bookkeeper's job), tax preparation (that is the CPA's job), or audit work. A fractional CFO sits above operations and focuses on the future, not the past.

How a Fractional CFO Differs From Your Other Finance People

Your bookkeeper records transactions. They keep your books clean and reconcile accounts monthly. This is backward-looking, transactional work.

Your CPA or accountant interprets your historical financial data for tax purposes and compliance. They may provide some planning, but their core job is backward-looking: what happened, and how do we report it correctly?

Your controller (if you have one) manages the accounting function, ensures accuracy, handles month-end close, and produces financial statements. This is operational and also backward-looking.

Your fractional CFO is forward-looking. They use the data from all of the above to build models, identify risks, structure deals, and advise on strategy. They answer: "Where are we going, how do we get there, and what could go wrong?"

When Do You Actually Need One?

Consider hiring a fractional CFO if: your revenue has crossed $1M and financial decisions are becoming complex enough to occupy significant CEO time; you are preparing to raise outside capital and need a polished financial story and model; your cash flow is inconsistent and you cannot clearly explain why; you are considering an acquisition, a significant new product line, or a major operational change; or you have recently received an acquisition inquiry and have no one to lead the financial diligence process.

What to Expect to Pay

Fractional CFO pricing typically runs $3,000–$15,000 per month depending on the scope, hours, and the individual's experience level. Engagements for fundraising or M&A preparation may be project-priced at $10,000–$50,000 for a defined deliverable. Some fractional CFOs take a small equity stake instead of or in addition to cash compensation for early-stage companies.

How to Evaluate Candidates

Ask for specific examples of businesses similar to yours they have worked with and what measurable impact they had. Ask how they price — do they charge by the hour, by a monthly retainer, or by project? Ask what their typical onboarding process looks like and how long before they start producing useful output. A good fractional CFO should be producing a financial model or cash flow forecast within the first 30 days.