Fractional CFO hourly rate and monthly cost by hours a week

A senior fractional CFO in the US typically charges $175 to $300 an hour. Monthly cost is the hourly rate times hours per week times 4.33, so 5 hours a week costs about $3,800 to $6,500 a month and 10 hours a week about $7,600 to $13,000. Most small and mid-sized companies land between 5 and 10 hours.

Those are the rates senior fractional CFOs set on Side.work, and they line up with what CFO firms publish for experienced partners. The rest of this guide shows the cost at every common hour level, how retainers compare with hourly billing, and what pushes a quote up or down, so you can budget before the first call.

Fractional CFO cost per month by hours a week

The table uses 4.33 weeks per month and three points in the senior range: $175 for an experienced CFO in a straightforward business, $225 as a common middle, and $300 for a specialist in a complex situation such as a raise, an acquisition or a regulated industry.

Hours a week	At $175 an hour	At $225 an hour	At $300 an hour
5	$3,789	$4,871	$6,495
8	$6,062	$7,794	$10,392
10	$7,578	$9,743	$12,990
15	$11,366	$14,614	$19,485
20	$15,155	$19,485	$25,980

These are specialist fees only. On Side.work you also pay a platform fee on billings (12 percent on Starter, 8 percent on Growth, 5 percent on Scale) and the plan subscription. The CFO keeps 100 percent of their rate. Example: 10 hours a week at $225 is $9,743 a month, plus 8 percent on Growth ($779), for about $10,522 on one invoice. See plans and fees for the full list.

How much should a fractional CFO charge per hour?

A fractional CFO with prior CFO or VP Finance experience should charge roughly $175 to $300 an hour in the US. Rates under $150 usually mean a less senior profile, such as a controller or FP&A analyst using the CFO title. Rates above $300 are normal for narrow specialists, for example SaaS metrics before a Series B or a sell-side process.

The rate is less important than what the hours buy. A $275 CFO who builds a cash forecast in two weeks and then needs 5 hours a week can be cheaper per year than a $175 CFO who needs 12 hours a week because they are learning your industry on your time. Ask every candidate how many hours they expect after the first 90 days, not just their rate.

Fractional CFO day rate

Some CFOs quote a day rate for workshops, board prep or an on-site week. An 8 hour day at $175 to $300 an hour works out to $1,400 to $2,400. Day rates make sense for a defined block of work, such as a budget offsite. For ongoing work, weekly hours with a cap are easier to control.

Retainer vs hourly billing

Many CFO firms sell a fixed monthly retainer instead of hours. A retainer gives you a predictable bill and gives the firm room to staff the work with junior people under a partner. Hourly billing shows you exactly what you pay for and who did it. The tradeoff looks like this:

Model	How it is billed	Good for	Watch out for
Monthly retainer	Fixed fee for a defined scope	Stable, repeating work such as the monthly package and board meeting	Scope creep fights, unused hours you still pay for, unclear who does the work
Hourly with a weekly cap	Approved hours times the rate, capped each week	Most small and mid-sized companies, and work that varies month to month	Needs a weekly timesheet review, which takes a few minutes
Project fee	One price for a defined deliverable	A financial model for a raise, a cleanup, a lender package	Change requests once the project starts

On Side.work every contract is hourly with a weekly hours cap and a notice period, and you approve a timesheet each week before anything is billed. That gets you the predictability of a retainer, because the cap is the ceiling, without paying for hours nobody used.

What drives fractional CFO pricing up or down

• Stage and event. Raising a round, selling the company or refinancing debt pushes hours up for two to four months. Steady state work needs far fewer.
• State of the books. If the accounting is months behind, part of the bill becomes cleanup. A fractional controller at $110 to $180 an hour does that work more cheaply than a CFO.
• Industry complexity. Revenue recognition in SaaS, job costing in construction, inventory in ecommerce and grant accounting in nonprofits each need someone who has done it before, and that experience costs more per hour but less per month.
• Reporting load. A monthly board, an investor update and a lender covenant package each add hours every month.
• Number of entities. Consolidating two or three companies, or a parent with a foreign subsidiary, adds real work.

Typical monthly budgets by company situation

These ranges use the senior rate band above and the hours we see most often for each situation. They are a starting point for your own budget, not a quote.

Situation	Typical hours a week	Monthly specialist fees
Owner-led small business, books current, wants cash visibility	5	$3,800 to $6,500
Growing company with bank debt or a board	8 to 10	$6,100 to $13,000
Startup preparing a seed or Series A raise	10 to 15 for 2 to 4 months	$7,600 to $19,500
Sale, acquisition or refinancing project	15 to 20 for the project	$11,400 to $26,000

If you run an owner-led company, our page on a fractional CFO for small business breaks down the 5 to 10 hour scope in more detail.

Is a fractional CFO worth the cost?

A fractional CFO is worth it when the decisions they improve are worth more than their fee. One avoided cash crunch, a price increase on the right product line, a better loan term or a cleaner raise usually covers a year of 5 to 10 hour weeks. If cash is stable and no big decisions are coming, spend the money elsewhere for now.

The honest comparison is not the hourly rate against a salary. It is the cost of 5 to 10 senior hours a week against the cost of the decisions you are making without them. A full-time CFO brings a senior salary, benefits, often equity and a months-long search, for a job that may only hold ten hours of CFO work a week at your size.

How to keep the bill predictable

1. Clean the inputs first. A CFO bills the same rate whether they are planning or chasing missing receipts. Get the books current and the statements in order before the first week. If your bookkeeping export is messy, tools that turn it into board-ready financial statements can shorten the CFO's first month.
2. Write down the standing deliverables. Three or four items, such as the weekly cash forecast, the monthly package and the board deck, with dates. Anything else is a project with its own hours.
3. Use a weekly hours cap. Raise it for a project, lower it afterwards. Never sign an open-ended engagement.
4. Review the hours every quarter. A good CFO should need fewer hours over time as the routine settles. If the hours only go up, ask why.
5. Give access on day one. Bank, accounting file, payroll, key contracts. Every week of waiting for access is a week of paid guessing.

Frequently asked questions

How much does a fractional CFO cost per month?

A fractional CFO usually costs $3,800 to $13,000 a month for 5 to 10 hours a week at senior US rates of $175 to $300 an hour. Companies in a raise or a sale often go to 15 or 20 hours for a few months, which brings the range to about $11,400 to $26,000 a month before any platform fee.

Is a fractional CFO cheaper than a full-time CFO?

Yes, for most companies under about $20 million in revenue. You pay only for the hours the role actually needs, with no benefits, equity or recruiting fees. Once you need 25 to 30 hours a week of CFO work on an ongoing basis, a full-time hire starts to make more financial sense.

Do fractional CFOs charge hourly or a monthly retainer?

Both are common. CFO firms often sell a fixed monthly retainer, while independent CFOs more often bill hourly. On Side.work every contract is hourly with a weekly cap, you approve hours each week, and you pay one invoice for approved hours plus the platform fee.

What is a fair fractional CFO hourly rate for a startup?

For a seed or Series A startup, $175 to $250 an hour is a fair range for a CFO who has run a raise before. Pay toward the top of the range only for specific experience you need now, such as SaaS metrics, a debt facility or a board with institutional investors. See what a fractional CFO does in 10 hours a week for a typical startup scope.

Ready to see real rates and availability? Enter fractional CFO, your hours and your budget on Side.work and get a ranked shortlist of verified CFOs in minutes. If you only need part time finance help for a defined project, the part time CFO page shows how to scope it.