Hire a fractional CFO when the decisions in front of your agency have outgrown the information you have to make them, and your books are clean enough to build on. That is the whole answer. Everything else in this piece is about how to tell whether both halves are true for you, because most owners are right about the first half and wrong about the second, or the other way round.
I spent twenty years in the CFO chair at agencies and media companies before starting this firm. The pattern I saw most often was not an agency that hired a CFO too early. It was one that hired a CFO the month after the decision that needed one. The pricing had already been set, the hire had already been made, the buyer was already in the data room. A CFO can explain a decision after the fact. The value is in being there before it.
The two conditions that tell you it is time
Revenue thresholds get quoted a lot, and they are useful as a rough guide. But the real test is two conditions, and you need both.
1. Your decisions have outgrown your information
You are making calls on pricing, hiring, client mix or cash that are large enough to hurt if they are wrong, and you are making them on instinct, last year’s numbers, or a spreadsheet only one person understands. The stakes went up and the instruments did not.
2. The books can bear the weight
The month closes, on a schedule, and the balance sheet ties. Revenue is recorded net of pass-throughs and in the right period. If that is not true yet, a CFO will spend the first months doing controller work at CFO rates. Fix the close first with a fractional controller, then bring in the CFO. The longer version of that sequencing argument is in fractional controller vs. fractional CFO.
Seven signs it is time to hire a fractional CFO
None of these is conclusive on its own. Three or more at once, in an agency that closes its books monthly, and the question has usually answered itself.
You are the forecast
If someone asked what cash looks like in ten weeks, the only honest answer is to ask you, and you would work it out in your head. That works until the business gets big enough that your head is also needed for clients, hiring and sales, which is roughly now.
You learned about a cash problem from the bank balance
A tight month should never be a surprise. In agencies it usually is, because client payment timing, retainer billing and pass-through media all move cash on different schedules, and the P&L shows none of it.
Your biggest client’s margin is a guess
You know what they pay. You do not know, with any confidence, what they cost once you count the hours your team actually spends on them. The largest account is very often not the most profitable one, and sometimes it is the least.
You are about to hire and cannot say what it does to margin
Headcount is most of an agency’s cost base. A senior hire made ahead of revenue is a bet, and it should be a sized bet with a date by which it needs to pay back. If the decision is being made on whether the team feels stretched, the numbers are not in the room.
Your rates were set by what felt reasonable in 2023
Pricing that has not been re-examined against actual delivery cost and utilization drifts downward in real terms every year. It is the single cheapest problem a CFO fixes and often the one that pays for the engagement.
Your partners disagree about the numbers, not the strategy
When a leadership meeting spends its time arguing about what last quarter actually earned rather than what to do next quarter, the problem is not alignment. It is that nobody owns a single version of the truth.
Your controller keeps getting asked CFO questions
What should we charge? Can we afford the new office? Should we take the loan? A good controller will attempt an answer, and the business will treat it as a CFO answer. That is unfair to the controller and risky for the business.
When to hire a fractional CFO, by agency size
Measured in net revenue, meaning gross billings less pass-through media and production, because that is the money the agency actually earns. These are guides, not thresholds. A $3M agency heading into a sale needs more than a $6M one that is steady and simple.
Under $2M net revenue
Usually too early for ongoing CFO support. A reliable bookkeeper, a good tax accountant, and a monthly close are the priority. A single project, such as a pricing review or a cash model, can be worth it if a big decision is coming.
$2M to $5M
The window where most agencies should start. The owner can no longer hold the whole picture, the team is large enough that utilization matters, and a few pricing or hiring mistakes a year cost more than the engagement. This is where a CFO with a controller behind them tends to earn back its cost fastest.
$5M to $20M
Hard to justify going without. Client mix, capacity planning, partner economics and cash across multiple revenue streams are too consequential to run on instinct, and outside parties such as lenders, investors and acquirers start expecting CFO-grade reporting. Fractional still fits most agencies in this range because the judgment is needed weekly while the hours are not needed daily.
Beyond that, or with institutional money
The point to ask whether the role has become a full-time one. More on that below.
When it is too early
A good fractional CFO should be able to tell you not to hire them. These are the situations where that is the right answer.
The books are not closing
If last month has not been closed yet, or the balance sheet has accounts nobody can explain, start with the controller. Strategy built on unreconciled numbers is worse than no strategy, because it looks authoritative.
There is no decision to make
If the next twelve months are genuinely steady, with no hires, no pricing changes, no new service lines and no outside capital, a CFO will produce very good reports that change nothing.
The owners will not act on what the numbers say
A CFO’s work ends in a recommendation. If the plan is to hear that a client is unprofitable and keep them at the same rate anyway, save the money. This is rarer than it sounds, and it is worth being honest with yourself about.
If a sale, raise or buyout is coming, hire earlier than you think
This is the single most common timing mistake, and the most expensive.
A buyer or investor will look at two to three years of trailing financials. A CFO who joins the month before the process starts can present those years clearly, but cannot change what is in them. A CFO who joins twelve to eighteen months ahead can fix revenue recognition, put WIP on the balance sheet properly, reprice or exit the clients that drag down margin, and build a close that has already survived a year of scrutiny before diligence arrives.
The same logic applies to a partner buyout, a bank facility or bringing in a new equity partner. The other side of the table will have a professional reading your numbers. You want one who has been reading them for a year, not one who met them last week. Our interim CFO piece covers what to do when the process has already started and the seat is empty.
What waiting actually costs
The cost of a fractional CFO is visible on an invoice. The cost of not having one shows up somewhere else, which is why it gets underestimated.
Consider an illustrative agency at $4M in net revenue with one client representing a fifth of it. If that client is running at half the margin of the rest of the book, and nobody has measured it, the agency is quietly giving away a meaningful slice of profit every month. A repricing conversation that recovers even part of that gap usually covers the engagement. Underpriced work, a hire made two quarters early, and cash tied up in unbilled WIP are the three places we most often find the money.
For the cost side, start with the benchmark rather than any proposal. Nearly all agencies spend 2 to 6 percent of net revenue on finance personnel each month, counting internal salaries plus outsourced bookkeeping, controller and CFO support. Software sits on top. Work out where you are today, and the question becomes what you are getting for that spend rather than whether a CFO is affordable. The full math is in how much a fractional CFO costs. However you buy it, the mechanism should be a monthly budget and scope that you authorize and can change, not an open hourly meter.
When to hire a full-time CFO instead
Fractional is the right answer for most agencies for longer than they expect. It stops being the right answer when the role genuinely fills a week.
The work needs a senior person most days
Multiple entities, several countries, monthly reporting to institutional investors, an active acquisition program. When finance leadership becomes a daily management job rather than a weekly one, the seat is full-time.
An investor or lender requires it
Some capital comes with a condition that the CFO be an employee. That is a fair condition and usually a sign the business has reached that scale anyway.
The finance team needs a full-time leader
Once there are several people in finance, someone has to manage them day to day, and a controller managing a team while the CFO is part-time can work for a while but rarely for long.
A full-time CFO runs $250K to $450K all-in, so be honest about whether the role would fill the calendar or just the org chart. When the time does come, a fractional CFO who has been in the business for a year is the best person to write the job spec, and often to run the search alongside our recruiting team. The handoff is part of the work, not the end of it.
What to have ready
None of this is required to start a conversation. All of it makes the first month faster and cheaper.
Twelve months of closed books
Or an honest account of which months are not closed and why. Either is fine. Pretending is the only wrong answer.
Access to the systems
Accounting, time tracking, project management and payroll. In agencies these rarely talk to each other, and seeing all four is how a CFO finds out what your margin really is.
A list of the decisions coming in the next year
Hires, pricing changes, a new office, a new service line, a partner exit. This is the real scope of the engagement, and writing it down usually clarifies whether you need a CFO, a controller or both.
A view on what good looks like
One paragraph on what you want to know every month that you do not know today. The best engagements start from a question, not a deliverable list. What those deliverables should be for an agency is laid out in CFO services for marketing agencies.
Why the timing is different for an agency
The signs above arrive earlier in an agency than in most businesses of the same size, for reasons that are specific to how agencies make money.
Gross billings flatter the top line, so an agency can look bigger and healthier than it is. Pass-through media and production move large amounts of cash that are not yours, which means a healthy bank balance can hide a real shortfall. Project work creates WIP and revenue recognition questions that a simple retainer business never has to answer. And because people are the product, every hiring decision is a margin decision.
The mix differs by shop. An advertising agency placing media carries a different cash exposure than a PR and communications firm on retainers, or a digital marketing agency selling a blend of projects and platforms. What they share is that the P&L alone will not tell you it is time. The fractional CFO you hire should already know where to look.
When to hire a fractional CFO: FAQ
When should a company hire a fractional CFO?
When two things are true at once. The decisions in front of the business have outgrown the information the owners have to make them, and the books are reliable enough to build on. The first condition is what creates the need. The second decides whether a CFO can do anything useful about it yet. If the books are not closing monthly, hire a controller first and bring in the CFO once the numbers can be trusted.
At what revenue should an agency hire a CFO?
Revenue is a rough guide, not a trigger. For agencies, measure it as net revenue (gross billings less pass-through media and production), because that is the money the business actually earns. As a rule of thumb, a fractional CFO starts paying for itself somewhere around $2M to $3M in net revenue, and becomes hard to go without above $5M. A full-time CFO usually makes sense well above that, or earlier if a transaction or an investor demands one. The complexity of the business matters more than the number.
Should I hire a controller or a CFO first?
The controller, almost always. A controller makes the numbers right and a CFO decides what to do about them, and a CFO working from books nobody has closed produces confident answers to the wrong questions. The exception is a business with a clean close and a decision pending, in which case the CFO can come first. The best arrangement is both, with the controller running the close under CFO direction.
When should I hire a full-time CFO instead of a fractional one?
When the work needs a senior person most of the week, every week, for the foreseeable future. That usually means a business running several entities, reporting monthly to institutional investors, preparing for a public listing, or large enough that finance leadership is a daily management job rather than a weekly one. A full-time CFO runs $250K to $450K all-in, so the test is whether the role would genuinely fill the calendar, not whether the title would look good on the org chart.
How far before a sale or a raise should I bring in a CFO?
Twelve to eighteen months, if you can. Buyers and investors look at two to three years of trailing numbers, and a CFO hired the month before a process starts can explain those numbers but cannot change them. With a year of runway there is time to clean up revenue recognition, fix the margin story on your weakest clients, and walk into diligence with a close that has already survived scrutiny.
Is it ever too early to hire a fractional CFO?
Yes. If the books are not closed monthly, if the business is small enough that the owner can hold the whole picture in their head, or if there is no decision in the next year that the numbers would change, the money is better spent on bookkeeping and a controller. A good fractional CFO will tell you this in the first conversation rather than take the engagement.
The bottom line
The right time to hire a fractional CFO is before the decision that needs one, with books clean enough that the advice lands on solid ground. For most agencies that is somewhere between $2M and $5M in net revenue, earlier if a transaction is coming, and later only if the business is genuinely simple and steady. If you are not sure which side of that line you are on, that is usually a sign the conversation is worth having. The worst outcome is not hiring a CFO a year early. It is hiring one a month late.