Most fractional CFO engagements are quoted at $3,000 to $10,000 a month, rising to $10,000 to $20,000 or more when the involvement is heavy. Those ranges are real. They are also close to useless, because a single monthly number tells you nothing about who is doing the work behind it. A CFO working alone at $300 an hour and a CFO with an analyst behind them at $75 an hour produce very different invoices for the same set of deliverables.
So this piece does two things. It gives you the one benchmark I actually trust for ballparking finance cost — a share of net revenue, not a retainer tier — and then it publishes our rates and how we bill, so you can do the arithmetic yourself instead of taking a range on faith.
The one number I'd budget from
Set retainer tiers aside for a moment. There is a pattern that has held across nearly every agency I have worked with in twenty years, and it is a far better starting point than anyone's price list.
Agencies spend between 2% and 6% of net revenue on finance personnel. Not roughly. Almost exactly, across firms of wildly different size, structure, and sophistication. Net revenue here means agency gross income — what is left after pass-through media and production. And the 2–6% is people: internal salaries plus any outsourced bookkeeping, controller, and CFO support. Software and systems sit on top of that number, not inside it.
So if you want a ballpark, start here:
Annualized, that's $40K–$120K, $100K–$300K, and $200K–$600K — for the whole finance team, not one seat.
Below 2% and something is usually not getting done: the close is late, the forecast doesn't exist, or someone senior is doing finance in the margins of another job. Above 6% and the structure is usually wrong rather than the people overpaid — too many hours at too high a rate, or too many hands on work that one well-supported person could own.
What makes this benchmark useful is that it forces an apples-to-apples comparison. When you evaluate a fractional CFO fee, compare it to everything you spend on finance people, not to your bookkeeping invoice. If a $6,000-a-month engagement absorbs a $95,000 controller seat and half a bookkeeper, it isn't an added cost. It's a reallocation, and usually a cheaper one.
The rate that matters is the blended one
We don't sell you a CFO. We sell you a finance team with a CFO on top of it — and that changes the arithmetic more than anything else on this page.
Every one of our engagements has at least one analyst assigned alongside the CFO. Not as an upsell; as the design. Most of the hours in any finance engagement are modeling, reconciliation, data pulls, and report building. That work has to happen, and it does not need a CFO doing it.
Here are our rates:
What that does to a real month
Take 40 hours of finance work: a close reviewed, a forecast updated, a board pack built, two pricing questions answered, and one client-profitability question chased to the bottom.
$300 / hour, all 40 hours
Blended rate $131 / hour
Same deliverables. Less than half the invoice. And the CFO's ten hours went to the ten hours that needed a CFO, rather than being spent rebuilding a spreadsheet. On most engagements our blended rate lands below $150 an hour — which is what a solo fractional CFO charges for roughly half the output.
What a typical engagement costs
For an agency between $2M and $10M in net revenue where we take over the finance function — bookkeeping, AP, invoicing, payroll, controller, analyst, and CFO — the number usually lands between $5,000 and $10,000 a month. Where exactly the line sits varies by client: some keep pieces like invoicing, AP entry, or payroll admin in house, and plenty hand us all of it. Either way, measured against the 2–6% benchmark above, a full-function engagement lands at the bottom of the band and frequently below it. That isn't a promotional rate. It's the blended team doing what it's built to do.
Three other things that quietly lower the number
The blended rate is the biggest lever, but it isn't the only one.
We already know agency economics
Pass-through media, AGI, work in progress, utilization, deferred retainers, the difference between a profitable client and a busy one. A generalist bills you for that education at their hourly rate. We start on week one instead of month three, and the hours you don't pay for are real money.
The Hub is already built
Reporting infrastructure you are not paying us by the hour to construct. The Hub connects your accounting, time, and project systems into one view, which means the monthly reporting pack is a refresh rather than a rebuild. That is the single most commonly over-billed activity in outsourced finance.
We automate what shouldn't be billed
We have AI and automation engineers on staff, which is an unusual thing for a CFO firm to say. The practical effect is that when we find a recurring manual hour, our instinct is to kill it rather than bill it every month for the life of the engagement.
You authorize a budget. We work to it.
We keep pricing simple on purpose — not because it's easier to explain, but because a surprise on a finance invoice is the fastest way to lose the trust the entire engagement runs on.
Straight from our engagement agreement:
Unless otherwise indicated for a given task or project, we will agree to a monthly budget and scope of work and perform services up to that monthly budget. The budget is at your discretion and may be modified upon your request. However, providing at least 30 days notice of material changes will help ensure we can assign the appropriate team members to your engagement.The Good CFO engagement agreement
That is the whole mechanism. You set a budget, we agree what it buys, and we work to it at the rates above. There is no overage clause because there is nothing to overage — we don't work past an authorized budget. Need to spend more for a quarter because you're integrating an acquisition? Tell us. Want to dial it back because the year is quiet? Tell us, and give us a month so we can staff it properly.
Open-ended hourly
We bill at hourly rates, but always against a budget you've approved in advance. We very rarely take an hourly engagement with no ceiling, because that structure quietly trains you not to call your CFO — which defeats the entire purpose of having one.
Day rates — no
They push everything into scheduled blocks. Good financial leadership is continuous awareness of your business, not a day on the calendar.
Equity and success fees — never
Someone advising you on whether to sell should not have a stake in you selling. We'll do the work; you can pay us for the work.
Flat-fee project quotes we can't stand behind
We'll occasionally take on a defined project — a raise, a systems rebuild, a partner buyout — and it runs the same way: authorized budget, published rates. You will see firms quote work like this as a flat $15,000 to $50,000. The honest answer is that real project costs are all over the map, and publishing a range we'd have to walk back isn't transparency. It's marketing.
What actually moves the number
If two quotes for what sounds like the same engagement differ by triple, one of these five things explains it.
How much of the function you hand over
The single biggest driver. A monthly review and a maintained forecast is a fraction of owning the close, the cash plan, the reporting pack, and the finance team. Be honest with yourself about which one you're buying — purchasing four days of involvement and using one is a common and expensive mistake.
How much stays in house
If you have a strong bookkeeper and a capable ops lead, you need fewer of our hours at the bottom of the stack, and the engagement gets cheaper. We'd rather tell you that than replace someone who is doing fine.
Complexity of the business
Multiple entities, international payroll, pass-through media and production, deferred retainer revenue, work in progress on unbilled hours. Agencies are more complex than their size suggests, which is exactly why generic finance help struggles with them — and bills you while it struggles. The shape of that complexity varies: an advertising agency placing media carries a different problem than a PR and communications firm on straight retainers, or a media company with production entities underneath it.
The state of your books
A team arriving to find a nine-month-old close and a chart of accounts nobody has touched since 2019 will spend the first quarter on cleanup. The good news is that cleanup runs at $50 to $75 an hour with us, not CFO rates. Getting the accounting and controller layer right first is almost always the cheaper path.
What is in flight
A raise, an acquisition, a lender covenant problem, or a partner exit raises both the intensity and the stakes. Expect the authorized budget to reflect that for a few months, and expect it to be worth it.
Fractional CFO cost vs. a full-time CFO
The comparison people make is fee versus salary. The comparison that matters is fee versus fully loaded cost, and then against how much of that seat you would actually use.
A full-time agency CFO commands a base of roughly $200,000 to $350,000 depending on market and size. Add bonus, benefits, payroll taxes, and often equity, and the fully loaded number lands between $250,000 and $450,000 a year. Then add the recruiting fee to find them, the three to six months before they are productive, and the risk that the hire is wrong.
A full-function engagement with us runs roughly $60,000 to $120,000 a year, and lighter arrangements sit well below that. So the direct saving is somewhere between half and 80 percent, before you count recruiting and ramp.
But the discount isn't the real argument. Below about $20M in net revenue, most agencies don't have five days a week of CFO-level work. They have three days a month of it, sitting alongside twenty days of controller and analyst work that does not need a CFO doing it. Hiring full-time means paying CFO rates for all of it. Hiring a solo fractional CFO means paying $300-an-hour rates for the analyst work too. A blended team is the version of the fractional model that actually solves the problem it claims to solve. We walk through the structural side of this in outsourced CFO vs. fractional CFO.
Five questions to ask any firm you're evaluating
A $6,000 quote and a $9,000 quote are frequently the same price once you read the agreement. Ask these of everyone on your list, including us.
Who actually does the work, and at what rate?
If the answer is "the CFO does everything," you're paying senior rates for junior work — and the CFO's attention is going to spreadsheets. If the answer is a team, ask for the rate card and work out the blended number yourself.
What happens in a heavy month?
Is there an overage clause, or is there a ceiling? Those are very different answers. A "fixed monthly fee" that bills hourly past a cap is not a fixed monthly fee.
Is the accounting layer included?
A CFO needs clean books to work from. If bookkeeping and controller support is a separate engagement, add it to the comparison — a CFO fee quoted without it is not the real cost of the outcome.
What triggers an extra fee?
Onboarding and cleanup charges, required software licenses passed through, transaction or success fees that appear when a raise starts. Get every one of them quoted before you sign rather than discovering them in month one.
How do I change it, and how do I leave?
Notice period, minimum term, and what happens to your data and your models on the way out. Ours: change the budget whenever you like, 30 days' notice on a material change, and your data stays yours.
How to tell whether the cost is worth it
The mistake is benchmarking a finance fee against your bookkeeping bill. The right benchmark is the size of the decisions the work is there to change.
Take a $10M agency paying $8,000 a month — $96,000 a year, or under 1% of net revenue. A two-point improvement in net margin is $200,000. Repricing one underwater retainer is often $50,000 to $150,000 a year on its own. Catching a utilization problem a quarter earlier, or walking into a raise with a model that holds up under diligence, is worth multiples of the fee. None of that is exotic CFO magic. It is what happens when someone senior is finally looking at the right numbers on purpose, with someone else doing the work of assembling them.
So the test is straightforward. Within a quarter or two, your CFO should be able to point at specific decisions that went differently because they were there, and put a number on them. If they cannot, the problem isn't the price. It's the person or the scope, and either one is fixable.
Fractional CFO cost FAQ
How much does a fractional CFO cost per month?
Most fractional CFO engagements are quoted at $3,000 to $10,000 a month, rising to $10,000 to $20,000 or more when the involvement is heavy. A more reliable way to budget is as a share of net revenue: agencies typically spend 2% to 6% of net revenue (AGI) on finance personnel, so a $5M agency should expect roughly $8,300 to $25,000 a month across bookkeeping, controller, and CFO work. At The Good CFO, taking over the whole finance function for an agency between $2M and $10M in net revenue typically runs $5,000 to $10,000 a month.
What percentage of revenue should an agency spend on finance?
Across nearly every agency we have worked with, total finance team cost lands between 2% and 6% of net revenue (agency gross income). That is personnel only — internal salaries plus any outsourced bookkeeping, controller, and CFO support. Software and systems sit on top of it. Below 2% usually means something is not getting done. Above 6% usually means the structure is wrong, not that the people are overpaid.
What are The Good CFO’s billing rates?
CFO Partners bill at $300 an hour and up. Finance directors, AI and automation engineers, and HR consultants bill at $150 to $200 an hour. Controllers and financial analysts bill at $75 an hour. Bookkeepers bill at $50 an hour. Because every engagement pairs a CFO with at least one analyst, the blended rate on most engagements lands below $150 an hour.
Do you charge a fixed monthly retainer?
No. You authorize a monthly budget, we agree the scope of work, and we perform services up to that budget at our published rates. The budget is yours to change at any time; at least 30 days notice on a material change helps us assign the right team members. We do not work past an authorized budget, so there is no overage clause and no surprise invoice.
Do you work hourly, on day rates, or for equity?
We bill at hourly rates, but always against a budget you have authorized in advance. We very rarely take open-ended hourly engagements, and we never do day rates, equity, or success fees. Someone advising you on whether to sell should not have a stake in you selling.
Is a fractional CFO cheaper than a full-time CFO?
Substantially. A full-time agency CFO costs roughly $250,000 to $450,000 fully loaded once you add bonus, benefits, payroll taxes, and equity — before recruiting fees and three to six months of ramp. A full-function fractional engagement runs roughly $60,000 to $120,000 a year. Below about $20M in net revenue, most agencies do not have five days a week of CFO-level work to justify the seat.
What drives fractional CFO pricing up or down?
Five things: how much of the finance function you hand over, how much stays in house, the complexity of the business (entities, currencies, pass-through media, work in progress), the state of the books when the team arrives, and whether something major such as a raise or a sale is in flight.
The bottom line
If you want one number to budget from, use 2% to 6% of net revenue for your finance people, with software on top. Expect a full-function engagement with us to land at the bottom of that band — $5,000 to $10,000 a month for an agency between $2M and $10M in net revenue, at a blended rate under $150 an hour, against a budget you authorize and can change whenever you want.
Then ask the question that matters more than the monthly number: who is doing the work, and at what rate? A blended rate under $150 buys roughly twice the finance function that $300 an hour does. After that, judge the engagement the way you'd judge any hire — by the decisions it changes. A team that costs you $96,000 and finds you $300,000 was never really a cost.