What a fractional CFO does for a small business
In a small business the CFO job is less about investor decks and more about the owner's questions. Can we make payroll in March? Which jobs or products actually make money? Should we take the line of credit the bank is offering, and what does the covenant mean for us? A fractional CFO answers those questions for a few hours a week, then builds the habits that keep the answers current.
The work usually falls into five areas:
- Cash flow forecast. A rolling 13-week cash forecast that shows the low point before you hit it, updated every week from the bank and the open invoices.
- Margins and pricing. Gross margin by product, service line, customer or job, so price increases go where they belong.
- Budget and monthly review. A one-page monthly package the owner can read in ten minutes, compared against a budget that was agreed in advance.
- Bank and lender work. Loan and line of credit applications, SBA lender packages, covenant tracking and the quarterly reporting your bank asks for.
- Big decisions. Hiring, a second location, buying equipment, buying out a partner or getting ready to sell the company.
What the CFO does not do is data entry. Your bookkeeper still records transactions and your CPA still files the taxes. The CFO sits above both and makes their output useful for decisions.
When is a small business ready for a fractional CFO
Revenue is a rough guide, not a rule. Owner-led companies tend to feel the gap somewhere between $2 million and $20 million in annual revenue, when the business is too big to run from the bank balance and too small to justify a full-time finance executive. The clearer signals are operational:
- The bank balance looks fine, but you cannot say how many weeks of cash you have if a large customer pays 60 days late.
- Sales are growing while profit is flat or falling, and nobody can say which line of the business is dragging.
- Your banker wants a forecast, covenant calculations or a personal financial statement package, and you are building it the weekend before.
- You are about to sign something large: a lease, an equipment loan, a big customer contract, an acquisition.
- Month-end numbers arrive three or four weeks late, so every decision is made on old data.
- You are thinking about selling the business in the next few years and want the books to survive a buyer's diligence.
If your books are more than a couple of months behind, fix that first. A fractional controller or a good bookkeeper gets the records current, and the CFO starts once there is something reliable to plan with.
How many hours a week a small business needs
Most small businesses start lower than they expect. These scopes are typical on Side.work for an owner-led company with a bookkeeper in place.
| Hours a week | What you get | Fits when |
|---|---|---|
| 5 | Weekly cash forecast, monthly review meeting, one-page monthly package | Stable business that needs visibility and a second set of senior eyes |
| 8 to 10 | All of the above plus budget, margin analysis by line, lender reporting | Growing company, bank debt, owner making several large decisions a year |
| 15 to 20 | Hands-on project work such as a refinance, an acquisition, a sale process or a system change | A defined project of a few months, then back down to 5 to 10 |
The contract on Side.work carries a weekly hours cap, so a 5-hour engagement cannot quietly turn into 12. You can raise the cap for a project and lower it again afterwards without renegotiating the whole agreement.
How much does a fractional CFO cost for a small business
Senior fractional CFOs on Side.work charge $175 to $300 an hour. Monthly cost is the hourly rate times hours per week times 4.33. At 5 hours a week that is roughly $3,800 to $6,500 a month, and at 10 hours it is roughly $7,600 to $13,000 a month in specialist fees.
On top of the hours you pay the platform fee for your plan, 12 percent on Starter, 8 percent on Growth and 5 percent on Scale, plus the plan subscription. The specialist keeps 100 percent of the agreed rate. A small business hiring one CFO usually fits the Starter plan at $99 a month. The full breakdown is on the pricing page, and our guide to fractional CFO hourly rates and monthly cost walks through more examples by hours and scope.
Compare that with the two usual alternatives. A full-time CFO means a senior salary, benefits and a search that takes months, for a job that may only have ten hours of real CFO work a week. An outsourced accounting firm costs less but is built around bookkeeping and compliance, and the person you talk to day to day is rarely a former CFO.
A typical week, Fractional CFO
10 hours a week
- Hourly rate
- $175 to $300
- Monthly cost
- $7,600 to $13,000
Fractional CFO vs bookkeeper vs CPA for a small business
Owners often ask whether they need all three. Each one answers a different question, and the CFO is the one most small businesses are missing.
| Role | Main question it answers | Typical output | Looks |
|---|---|---|---|
| Bookkeeper | What happened? | Recorded transactions, reconciled accounts | Backward |
| CPA or tax firm | What do we owe and file? | Tax returns, year-end adjustments, compliance | Backward, annual |
| Controller | Are the numbers right and on time? | Monthly close, accruals, clean statements | Backward, monthly |
| Fractional CFO | What should we do next? | Cash forecast, budget, pricing, lender and deal work | Forward |
Under about $5 million in revenue, many companies pair a bookkeeper with a 5 to 8 hour CFO and skip the controller. Above that, or when the close is slow, a controller usually comes in between.
What the first 90 days look like
A good part time CFO shows results in a predictable order. In the first month they get read access to the bank, the accounting file and payroll, find what is miscoded or missing, and hand you a cash position you can trust plus a short list of risks ranked by dollar amount.
In the second month they build the 13-week cash forecast and a simple driver-based budget for the year. You agree on what the monthly package contains and when it arrives. In the third month the forecast starts earning its keep: scenarios for the decisions you are facing, a pricing review on your weakest margin line, and a lender reporting routine if you carry debt.
By day 90 you should be able to answer three questions without calling anyone: how much cash will we have in eight weeks, which part of the business makes the most money, and what happens to both if we make the decision in front of us. If you cannot, raise it at the quarterly review.
How hiring a part time CFO works on Side.work
Pick fractional CFO, enter the hours per week and your budget, and add a line about your business, for example a $6 million HVAC contractor with a bank line of credit. Side.work returns a ranked shortlist of verified specialists with live weekly availability and their hourly rate, so you only talk to people who can fit your schedule.
Every profile is checked for a work email domain, a LinkedIn profile, live portfolio links and payout identity, and each specialist confirms their side work does not conflict with their employment terms. Send intros, take a call, then sign a contract with a weekly hours cap and a notice period. An NDA and IP assignment are attached by default. Each week the CFO submits a timesheet, you approve the hours and pay one invoice. The full flow is on how it works.
When the work is mostly planning and cash, a fractional CFO is the right hire. If what you really need is someone to run operations and processes alongside the owner, look at a fractional COO instead.
Questions to ask a fractional CFO before you hire
- Which small businesses like mine have you worked with, by size and industry?
- Show me a 13-week cash forecast you built, with the names removed.
- How do you work with an existing bookkeeper and CPA without stepping on them?
- Have you dealt with bank covenants, SBA lenders or a line of credit renewal?
- How many clients do you carry, and how fast do you reply in the week before a payroll or a lender deadline?
- What would you fix first in my business, based on what you have seen so far?
Strong candidates answer with specific tools, timelines and tradeoffs. If the answers stay abstract after a 30 minute call, keep looking. Talking to two or three people before you pick one is normal, and your plan includes the intros to do it.