Owners google “fractional CFO” for one of two reasons. Either the numbers are late and wrong, or the numbers are fine and nobody acts on them. The title only fits one of those. Here is the job, the jobs it is not, and how to tell which one you have.
The job
A fractional CFO builds and owns the financial model the business runs on. In practice that means four things:
- The model. Revenue, margin, labor and cash, connected, so a change in one shows up in the others before it shows up in the bank account.
- The cash forecast. Thirteen weeks out, checked against actuals every week, so the surprise in week 9 gets seen in week 2.
- Capital and pricing decisions. Whether to take the loan, whether to raise the price, whether the new hire pays for itself, with the arithmetic attached.
- Board-ready numbers. A monthly close you can trust and a one-page view a lender, partner or buyer can read.
The difference from a consultant: a consultant recommends and leaves. A fractional CFO owns the model and the number, and is still there when the recommendation meets a real org chart.
What it is not
Bookkeeping and accounting are not on the list. Recording transactions, reconciling the bank, running payroll, filing the sales tax return: that is a bookkeeper and an accountant, and they are cheaper per hour than a CFO for a reason. If your books are three months behind, hiring a fractional CFO first is paying a strategist to do data entry. Fix the bookkeeping, then bring in someone to read what it says.
A fractional CFO is also not a guarantee of results and not an auditor. The model is only as honest as the inputs.
Where the CFO line blurs into COO
In an owner-run company the two titles share one desk. The model says labor is 38 percent of revenue and should be 30. That is a CFO finding. Getting it to 30 means changing the schedule, the dispatch rules and who owns the overtime decision. That is COO work. The same person can cover both when the business is small enough that the owner is still the integration layer for every cross-functional decision.
If you are not sure which side your problem sits on, read how to know whether you need a fractional CFO or a fractional COO. The short version: numbers wrong or late is a bookkeeping problem, numbers right and unused is a decision problem, and a decision problem is what the CFO and COO titles exist for.
The revenue band
Published market rates for a fractional CFO run $3,000 to $12,000 a month or $150 to $500 an hour (source: Eightx, 2026). For a fractional COO, $3,000 to $15,000 a month, with $5,000 to $10,000 common at $8M to $50M in revenue for 15 to 30 hours a week (source: Kamyar Shah, 2026).
The fit is roughly $2M to $20M. Below $2M the model is usually simple enough that a good bookkeeper and a quarterly conversation cover it, and the monthly rate is too large a share of profit. Above $20M the decision load is daily and the business needs a full seat, not a fraction of one.
Inside that band, the signs are consistent: the owner is the integration layer for every cross-functional decision, the monthly numbers arrive after the decision that needed them, or growth has outrun the management cadence.
How to find out which one you need
Do not guess the title. The $7,500 diagnostic reads the business over two weeks, books plus management interviews, then delivers three quantified findings, each with its arithmetic and its cost, and a 90-day plan sequenced by what pays first. It is a fixed fee, scoped before it starts, and up to $5,000 of it is credited against any implementation started within 30 days. If you stop after the plan, the plan is yours.
That is the sane starting point, because the findings tell you whether the live problem is a model problem, a decision problem or a bookkeeping problem, and only one of those needs a CFO.