Most companies hit the same wall somewhere between their first million in revenue and their first priced round. The books are closed every month, usually by a good bookkeeper, and the numbers are correct. But nobody is using them to decide anything. The founder builds the forecast at night, the bank covenant sits in a PDF nobody has reread, and the question "can we afford this hire?" gets answered by looking at the bank balance.
Fractional CFO consulting exists for that gap. It buys a senior finance person for a few days a month. Here is what the work covers, how a good engagement is scoped, and when it stops being the right answer.
What does fractional CFO consulting include?
A fractional CFO does the forward-looking half of finance. Bookkeeping records what happened. A controller makes sure it was recorded correctly and on time. A CFO, fractional or not, turns those records into decisions about cash, hiring, pricing and funding. The fractional part only changes how many hours a week that person is yours.
The work a bookkeeper and a controller do not do
The clearest way to see the scope is to put the four finance roles next to each other. Most small companies already have the first one and are missing the third.
| Role | Looks at | Main output | Typical time |
|---|---|---|---|
| Bookkeeper | Last month | Categorized transactions, reconciled accounts | A few days a month |
| Controller | Last month, done right | A clean monthly close, accruals, audit readiness | Part time to full time |
| Fractional CFO | The next 3 to 24 months | Cash forecast, model, budget, board pack, funding plan | A few days a month |
| Full-time CFO | The next 3 to 5 years | All of the above, plus a finance team and investor relations | Full time |
The five workstreams most engagements cover
- Cash forecasting. Usually a 13-week cash flow forecast updated weekly, plus a monthly view out to 18 or 24 months.
- The financial model and budget. One model that ties revenue drivers, hiring and spend together, and a budget the team is measured against.
- Reporting. A short monthly pack with the five to ten numbers that matter, and a variance note that explains the gaps.
- Funding. Deciding how much to raise and when, building the numbers for the deck, and handling investor questions in diligence.
- Treasury and risk. Where the cash sits, how exposed it is, and which contracts carry terms that could hurt.
Treasury sounds like a large-company word until a bank fails. The FDIC insures $250,000 per depositor, per insured bank, for each account ownership category. For a company holding a few million after a raise, that means most of its cash is uninsured unless someone spreads it across banks or sweep products on purpose. That is a one-afternoon job, and it is often the first thing a fractional CFO fixes.
How is a fractional CFO engagement scoped?
Scope is where these engagements succeed or fail. A useful scope names the decisions the company has to make in the next two quarters and works backward to the deliverables those decisions need.
Project, retainer or interim
Engagements come in three shapes. They differ in how long they run and in who owns the numbers once the work is done.
| Shape | Fits when | Typical deliverable | Watch out for |
|---|---|---|---|
| Project | One clear event, such as a raise or a pricing change | A model, a data room, a board deck | The model goes stale the month after handover |
| Monthly retainer | Ongoing decisions and no finance lead in-house | Forecast updates, monthly pack, board prep | Hours drifting into bookkeeping tasks |
| Interim | A CFO has left, or a transaction is live | Near full-time cover for a fixed period | No plan for who takes over afterward |
What the first 30 days should produce
A fractional CFO who is still "getting up to speed" after a month is billing you for their learning curve. The first month of a well-run retainer usually delivers four things:
- Read access to the accounting system, the bank accounts, payroll and the cap table, plus a list of what is missing or messy.
- A 13-week cash forecast the founder can read in five minutes.
- Agreed definitions for the core metrics, such as revenue, gross margin, burn and runway, so every later report uses the same words.
- A calendar of the finance events coming up: tax filings, board meetings, covenant tests, contract renewals.
If you are a startup rather than an established small business, the list shifts toward runway and the next raise. We cover that version stage by stage in fractional CFO for startups.
When does a fractional CFO beat a full-time hire?
For most companies below roughly $10 million in revenue, it does, most of the time. The work is real but lumpy. It peaks around a raise, a budget cycle or a board meeting, and goes quiet in between. A full-time hire is paid through the quiet months too.
The cost math, briefly
The US Bureau of Labor Statistics puts the median annual pay of financial managers at $166,570 in May 2025, and that category includes many roles junior to a CFO. For a founder, that means a full-time finance lead costs well above that figure once you add benefits, equity and a search fee. A few days a month of senior time costs a fraction of it, and you can stop it with a month's notice.
Signs you have outgrown a fractional CFO
- You have a finance team of three or more who need a manager every day.
- Investor relations, audits or debt covenants take more than two days a week on their own.
- Decisions stall because the fractional CFO is not in the room when they are made.
At that point the fractional CFO often helps hire their own replacement, which is a good sign the engagement did its job.
What goes wrong in fractional CFO engagements?
The stakes are cash. CB Insights analyzed 431 VC-backed companies that have shut down since 2023 and found that 70% cited running out of capital, with a median of 22 months between the last raise and the shutdown. For a founder, that means the risk is rarely one bad month. It is two years of spending decisions that nobody tested against a forecast. Three failure patterns show up again and again.
Scope that slides into bookkeeping
The company is short on help, so the fractional CFO starts categorizing receipts and chasing invoices. The hours get used up, and the forecast stops being updated. Fix it by keeping a separate bookkeeper and writing the CFO's deliverables into the engagement letter.
Nobody owns the decision
The CFO produces a clear model that shows the company cannot afford two senior hires this year. The founder hires both anyway, because the model arrived as an email attachment and never made it onto a meeting agenda. A fractional CFO needs a standing slot where numbers turn into calls, whether that is a weekly founder meeting or a quarterly session with advisors. Our advisory board meeting agenda shows one way to make that slot work.
The wrong profile for the stage
A CFO who ran finance at a 2,000-person company can be a poor fit for a 15-person startup. The large-company playbook assumes a team to delegate to. Ask each candidate what they personally built at a company your size, and ask to see a model they made, with the numbers changed.
How do you choose a fractional CFO consultant?
Treat it like any senior hire, but with a shorter trial. Four questions separate the useful candidates from the rest:
- Which decision in our next two quarters will your work change?
- What will we have in our hands after 30 days?
- Who does the work: you, or a junior on your team?
- How do we end this, and what do we keep when we do?
The last question matters more than it looks. The model, the forecast and the reporting templates should belong to the company and live in its own files. If the work lives in the consultant's tools, you are renting your own numbers. For how finance support fits among other kinds of outside help, see our guide to startup advisory services.
How Pinnaly runs finance consulting
Pinnaly's business finance consulting covers the workstreams above: cash flow optimization, budgeting and forecasting, financial reporting, liquidity and cash runway, and treasury and risk. For startups, the Startup Consulting side adds fundraising strategy, financial modeling and board readiness. Every consultation runs over video call.
A single business consultation fits a scoped question, such as a model review before a raise. A longer, fractional-style arrangement runs as Enterprise Consulting, which is a long-term partnership with a custom scope. Both are listed in the pricing section, with transparent pricing and no hidden fees.
Fractional CFO consulting: FAQ
What is the difference between a fractional CFO and an outsourced accountant?
An outsourced accountant records and reports what already happened, and often handles tax filings. A fractional CFO uses those records to plan what happens next: cash, hiring, pricing and funding. Many companies need both, and they should be two different people.
How many hours a month does a fractional CFO work?
It depends on the scope. A light retainer might be a day or two a month for forecasting and a monthly pack. During a fundraise or an audit the same engagement can run several days a week for a few months, then drop back.
Can a fractional CFO help raise money?
Yes, and it is one of the most common reasons to hire one. The CFO builds the model, sets the raise amount against a runway target, prepares the data room and answers the financial questions in diligence. The founder still leads the pitch and the investor relationships.
When is it too early for fractional CFO consulting?
If there is no revenue, no payroll beyond the founders and no raise on the horizon, a spreadsheet and a good bookkeeper are usually enough. The trigger is the first decision where a wrong number costs real money, such as a first senior hire, a large contract or a priced round.
What should a fractional CFO engagement letter include?
The named deliverables and their dates, the expected hours or days per month, who owns the models and files, confidentiality terms, and how either side can end the engagement. A scope written as "general finance support" is the most common cause of disappointment on both sides.
The short version
Hire a fractional CFO to make decisions with the numbers, and keep a bookkeeper for data entry. Scope the engagement around the next two quarters, expect a cash forecast in the first month, and keep the model in your own files.
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