What Does a CFO Do? The Role Explained (and When a Business Actually Needs One)
CFO means Chief Financial Officer — the executive who owns a company's financial strategy: where money comes from, where it goes, and whether the plan survives contact with reality. But the title gets used loosely, and most business owners have only a fuzzy sense of what a CFO actually does all day versus what their accountant already handles. This guide breaks down the real responsibilities, how the role differs from a controller and an accountant, what CFOs cost, and the honest answer to whether your business needs one.
The 6 core responsibilities of a CFO
1. Cash flow strategy. Not recording cash — steering it: how many months of runway exist, which payments to accelerate or delay, when a growth plan quietly becomes a cash crisis. (This is the single most common reason companies bring in CFO help — the moment growth and cash stop moving together.)
2. Financial planning & forecasting. Budgets, revenue models, scenario plans: what happens to cash and profit if sales grow 30%, a key client leaves, or you add three hires. Decisions get modeled before they get made.
3. Fundraising & capital. Choosing between debt and equity, preparing the model and metrics investors demand, running diligence, negotiating terms — and for loans, presenting financials a bank will actually approve.
4. Reporting & metrics. Turning bookkeeping data into a monthly reporting pack — margins, unit economics, KPIs against plan — and, critically, the interpretation: what the numbers mean and what to do about them.
5. Risk, controls & compliance. Payment approval controls, fraud prevention, insurance, tax-adjacent strategy. One control (3-way invoice matching) recovered $50,000 for one of our clients — that's CFO work.
6. Strategic partnership to the CEO. Pricing decisions, hire-or-don't calls, expansion math, acquisition analysis. The CFO is the numbers half of every major decision.
CFO vs controller vs accountant vs bookkeeper
| Role | Focus | Time horizon | Question they answer |
|---|---|---|---|
| Bookkeeper | Recording transactions | Past — daily/weekly | What happened? |
| Accountant | Statements, tax, compliance | Past — monthly/annual | Is it accurate and compliant? |
| Controller | Managing the accounting function | Present | Is the process reliable? |
| CFO | Financial strategy | Future | What should we do next? |
The confusion between CFO and controller is the most common: a controller makes sure the numbers are right; a CFO decides what to do because of them. Small businesses usually need bookkeeping done well first — strategy built on messy books is guesswork with confidence.
What does a CFO cost?
A full-time CFO in the US typically runs $200,000–$450,000+ per year in salary, bonus, and equity — which is why businesses under roughly $10–25M in revenue almost never hire one full-time. The alternative that's become standard: a fractional CFO — the same executive skill set, engaged part-time for a fixed monthly fee that's a fraction of a hire. Full pricing breakdown in our fractional CFO cost guide.
Does your business actually need a CFO?
Honest test: if your questions are "are my books right?" and "is my tax filed?" you need a bookkeeper and accountant, not a CFO. You're in CFO territory when the questions turn forward-looking — can we afford this hire, why is cash tight while revenue grows, what's our runway, how do we prepare to raise? We wrote a full diagnostic on exactly this: the 9 signs it's time to hire a fractional CFO (and 3 signs it's too early).
Want a CFO's Answer to Your Biggest Question?
Bring it to a free 30-minute call with an Ex-PwC Chartered Accountant — runway, pricing, fundraising, hiring math, whatever's on your desk. You'll leave with a real answer, and an honest take on whether you need ongoing CFO help at all.
Book a Free 30-Min CFO CallFrequently Asked Questions
Chief Financial Officer — the senior executive responsible for a company's financial strategy, planning, reporting, and risk. In small businesses the function is often filled part-time by a fractional CFO rather than a full-time hire.
Reviews cash position and forecasts, works with the CEO on upcoming decisions (pricing, hiring, spending), oversees the reporting produced by the accounting team, manages banking and investor relationships, and monitors performance against plan. Less recording of numbers, more deciding with them.
An accountant produces accurate records of what already happened — statements, reconciliations, tax filings. A CFO uses those records to shape what happens next — forecasts, capital decisions, and strategy. Most businesses need both; they are different jobs at different price points.
Yes — through the fractional model. A fractional CFO delivers executive-level finance leadership part-time, typically for businesses between $1M and $25M in revenue, at a small fraction of a full-time CFO's $200K+ cost.
Yes. The controller runs the accounting function and reports to the CFO; the CFO owns overall financial strategy and reports to the CEO and board. In small companies one person (or one fractional team) often covers both.
No. Many CFOs hold CPA, CA, ACCA, or CMA credentials, or MBA finance backgrounds — the role demands strategic financial skill rather than one specific license. Our team, for example, are Ex-PwC Chartered Accountants (CA) and ACCA-qualified.