Fractional or full-time CFO: match the role to the hours of work
Updated 16 October 2026
A chief financial officer, or CFO, turns the books into decisions about price, cash, hiring and capital. A company can hire one full time or engage one for part of each month. The part-time arrangement is called a fractional CFO. Both do the same kind of work. The choice comes down to how many hours of that work the company has each month, and whether three conditions for a full-time seat are present. The examples on this page use round figures as an illustration.
What a fractional CFO does
A fractional CFO works with the company for a set number of days each month and owns the forward-looking finance work. That work includes the annual budget, a 13-week cash forecast, margin and pricing analysis, scenario models for a hire or a new location, and the package a lender or investor asks for. The engagement is sized to the work in front of the company, and it can grow or shrink with that work.
The recording work sits underneath. A bookkeeper enters transactions and reconciles accounts, and a controller closes the month and checks the figures. A fractional CFO plans from those books. Averan's guide on whether you need a fractional CFO covers the step before this one.
A distribution company asks for four pieces of CFO work in a month: an update to the 13-week cash forecast (6 hours), a price review on its top 20 products (8 hours), a model of a second warehouse (6 hours) and the monthly leadership meeting (4 hours). That is 24 hours. A full-time role at 40 hours a week averages 173 hours a month, so this company's CFO work fills 13.8% of a full-time seat. The figures are an illustration.
Three triggers for a full-time CFO
A full-time CFO fits when one or more of three conditions hold. First, finance decisions come up daily and cannot wait for the next scheduled day. Second, the operation needs someone on site every day to lead a finance team. Third, the company is raising institutional capital or preparing for a sale, and the investors expect a dedicated executive.
When none of the three holds, a full-time CFO often fills the spare hours with controller work. The company then pays executive pay for month-end tasks a controller handles. Averan's page on the bookkeeper, controller and CFO seats sets out who does what.
A manufacturer with one plant reviews the three triggers. Pricing decisions come up weekly and can wait two days, so the first trigger is absent. The finance team is two people led by a controller, so the second is absent. The owners plan to bring in a private equity investor in 18 months, so the third is present. One trigger out of three points to a fractional CFO now and a plan to hire full time before the investor process starts. The figures are an illustration.
The two arrangements side by side
| Fractional CFO | Full-time CFO | |
|---|---|---|
| Time with the company | Set days each month | Every working day, on site |
| Cost structure | Monthly fee sized to the scope | Salary, bonus, benefits and often equity |
| Scope | Forecasts, pricing, models, lender and board work on a schedule | The same work daily, plus leading the finance team |
| Start time | Days to weeks | An executive search, often months |
| Fits when | None of the three triggers is present | One or more triggers is present and the hours fill the week |
The table compares structure. A company comparing actual prices asks each fractional firm for a written scope and fee, and asks a recruiter for the pay range of a CFO in its market.
A company needs 24 hours of CFO work a month in its current year. It expects 60 hours after it opens a second site, which is 34.6% of a 173-hour month. A fractional engagement covers both stages by adding days. If the company later reaches 140 hours a month and a trigger appears, the role is 80.8% of a full-time seat, and the full-time hire becomes the next step. The figures are an illustration.
Moving from fractional to full time
Most growing companies follow one path. A bookkeeper or controller keeps the books accurate. A fractional CFO plans from those books. When the hours and a trigger line up, the company hires a full-time CFO. The fixed cost stays low during the years when the CFO work is part time.
A fractional CFO can also help with the hire. The fractional CFO writes the job description, sits in on interviews and hands over the forecast, the models and the reporting calendar. The new CFO starts with a working set of files. Averan's finance executive search service covers that step.
Watch for one risk on the fractional side. A fractional role that grows to full-time scope, without the title, pay or authority of a full-time CFO, leaves both sides short. Review the hours each quarter so the arrangement changes before that happens.
A fractional CFO logs 30 hours in January, 38 in February and 52 in March for a services company, 120 hours across the quarter. The average is 40 hours a month, up from 24 a month a year earlier, a rise of 16 hours. The owner and the CFO agree to add two days a month and to review again in June. The figures are an illustration.
What this means for an owner
Count the hours of CFO work the company has each month and divide by 173, the hours in an average full-time month. Then check the three triggers: daily decisions, a team to lead on site, and institutional capital or a sale. If the share is small and no trigger is present, a fractional CFO covers the work. Review the hours each quarter. A controller keeps the books accurate under either arrangement.
CFO work from Averan
Averan Advisors provides fractional CFO work on a monthly scope, built on books that its controller service closes each month. When the hours call for a full-time hire, Averan helps write the role and hand over the work.
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If you want this done for you
What happens next
Reading about it and having it done are different things. Here is exactly what happens if you want the second one.
- The call takes thirty minutesYou describe the business and where the numbers are letting you down. We give you an expert view of your situation, and what we would start with. There is no pitch deck.
- We look at the fileYou give us read access to the books as they are. We come back with what is wrong, what it will take to fix, and whether the answer is bookkeeping, controller work, or something else.
- We send a written scope and a priceIt lists what we do each month, what you get, the date it lands and the fee. We agree it before anything starts, and it does not change unless you agree.
- We take over the books and close the first monthWe set up access and systems and enter the opening balances. The first close lands on the date in the scope, and every one after it does too.