A business that needs finance leadership but cannot justify a full-time executive has two outside options that sound alike and work differently. The fractional model sells hours: an experienced finance executive serves many clients at once, typically eight to fifteen, allocating a few hours a week or a fixed number of days a month to each. The dedicated model sells engagements: the executive takes on a deliberately limited number — often three to five — and treats each as a seat they occupy rather than a client they visit. Both put a capable person in front of the owner. The difference is in what that person can know, which decides what they can catch.
How the fractional model works in practice
A weekly or biweekly call, a monthly review of financial statements prepared by someone else, a board deck when there is a board, and project work — a financing, a model, a pricing analysis — billed by the hour or the day; the executive works from summary reports because there is no time to work from anything else, relies on the client's bookkeeper or controller for the close and the data, and allocates attention by urgency across the portfolio, which means a client with a crisis gets the hours that week and the others get the standing call; the model is honest about this — it is senior judgment applied at intervals — and for a business with a strong controller and occasional strategic needs, intervals are enough.
How the dedicated model works in practice
The executive owns the close, or builds it; builds the operating data — in a therapy group, session-level economics, utilization against break-even, the payer file; in an e-commerce brand, contribution after advertising by SKU and channel; in a software company, cohort economics and gross margin with hosting in cost of revenue — from the source systems rather than receiving it from a report; owns the 13-week cash forecast and refreshes it; attends the operating meetings where decisions are made, not only the finance review; and carries a fixed monthly calendar — close by business day ten, management report by twelve, forecast every Monday — that holds because the engagement count is capped; the model is also honest about its constraint: the executive can take only so many seats, which is why it is sold by the engagement and not by the hour.
The context gap, concretely
The mispriced payer contract is visible only in net revenue per session computed from remittance data — a fractional executive sees the income statement line for insurance revenue; the cash crunch in week twelve is visible only in a forecast built from the aging by payer and the premium calendar — a fractional executive sees last month's balance sheet; the clinician at 89 percent utilization who is about to resign is visible only in the scheduling data read weekly — a fractional executive sees payroll; the add-on whose synergies are not materializing is visible only when acquired-growth is separated from same-store in the pack — a fractional executive sees consolidated revenue growing; none of these is a failure of intelligence, and a fractional executive shown the detail would see it instantly; the gap is that the hours model does not include the time to build and read the detail, and the detail is where the money is.
What each model delivers well
Fractional: senior perspective on a decision the owner has already framed, a financing process, a board-ready deck, a model for a specific question, interim cover between controllers, a sounding board for an owner who has a capable finance team underneath; dedicated: the finance function itself where one does not exist or does not work — the close, the operating economics, the forecast, the payer or pricing or margin file, the management report, the compensation and growth models, the lender or buyer readiness — and the standing presence in the business that catches problems in the data before they arrive in the bank balance.
Where fractional is the right fit
The business has a controller who runs a clean accrual close and produces reliable statements; the operating economics are already measured and the owner reads them; the need is episodic — a raise, a sale, a board cadence, a project; the business is small enough that the owner holds the operating detail and needs judgment, not reconstruction; or the budget supports only a few hours a month and the owner understands that is what is being bought.
Where dedicated is the right fit
The books are cash-basis, late, or untrusted; the operating economics have never been computed — profit per session, contribution per order, margin by customer; the owner is deciding from the bank balance; the business is at the stage transitions where the finance function must be rebuilt — the second location, the first institutional lender, the add-on, the exit process; a sponsor or board expects a pack by a date every month; or the owner has already tried the hours model and found that problems kept arriving fully formed.
The cost comparison is not the comparison
Both models are priced in a range, and either can be more or less expensive than the other depending on scope and hours; the meaningful comparison is what each produces — a fractional engagement at a given monthly fee produces a defined set of reviews and projects, and a dedicated engagement at its fee produces a finance function on a calendar; the owner should price what they need, not the label.
The questions that tell you which you are buying
How many clients does the executive serve at once; who performs the close, and on what date; who builds the operating economics, from which systems; who owns the cash forecast and how often it is refreshed; which operating meetings does the executive attend; what is delivered on which business day each month; what happens in a crisis at another client; and is the fee for hours or for the function — the answers sort the offer into one model or the other regardless of what it is called.
The hybrid that often works
A dedicated CFO for the finance function and the operating rhythm, with a specialist brought in by the hour for a transaction, a tax structure, or a system implementation; the dedicated executive coordinates the specialists and keeps the business's data ready for them, which is where the specialists' hours go furthest.
What the models have in common. Both are outside the business and must earn the owner's trust with results; both depend on the quality of the bookkeeping underneath them, which is why the first act of either should be an honest assessment of the books; both are better than no finance leadership for a business past a few million in revenue; and both fail if the owner treats them as a reporting service rather than as a partner in the decisions.
Why the distinction matters now
The market uses "fractional" for every outside CFO arrangement, which lets a many-client hours model and a few-client engagement model be sold under one word; an owner who needs the function and buys the hours discovers the gap at the worst time — when the cash crunch, the diligence finding, or the departing clinician arrives already formed; naming the models separately is the only way to buy the right one.
Worked example
A behavioral health group with 19 clinicians and US$3.8 million in revenue engaged a fractional CFO for eighteen months at a fixed monthly fee, then moved to a dedicated engagement. What each period produced:
| Area | Fractional period (18 months) | Dedicated period (first 12 months) |
|---|---|---|
| Close | Bookkeeper's cash-basis books, reviewed monthly; 6–8 weeks behind | Accrual close by business day 10 from month 2 |
| Session economics | Not built; revenue by payer from the income statement | Contribution per session by clinician, payer, site; two payers found below cost |
| Cash | Monthly balance-sheet review; two payroll-week scrambles | 13-week forecast; one floor breach seen 9 weeks out and covered |
| Payer contracts | Auto-renewed; one rate letter accepted | Contract calendar; one renegotiation (+11% and authorization relief) |
| Turnover | 26%; discussed as a culture issue | Leading-indicator dashboard; retention program funded on cost per departure; 15% |
| Growth | Second site opened on demand; no model | Site model with ramp and credentialing lag; 120-day decision gate |
| Projects delivered | Lender package for a US$150,000 line; board deck for the owner's advisory board | Lender package resized to US$400,000 on the receivables cycle; sale-readiness baseline |
| Owner's own view | "Helpful calls; the problems still showed up first" | "The problems show up in the Monday report" |
Illustrative figures for a hypothetical organization; not a client's data.
The fractional executive was capable and the projects were well done. The gap was the function: nobody owned the close, the economics, or the forecast, so the group's recurring problems arrived fully formed between the monthly reviews. The dedicated engagement built the function first and then used it.