A Chief Financial Officer (CFO) is the senior executive responsible for a company's financial strategy, reporting, planning, capital management, and investor relations. At early-stage companies the CFO role is often a VP of Finance or fractional CFO. At Series C and beyond, a full-time CFO becomes essential as the company prepares for complex financing, M&A, or an IPO. The profile required changes substantially across company stages.
What a CFO Owns
A CFO's core responsibilities include: financial reporting and accounting, financial planning and analysis (FP&A), cash management and treasury, capital raising (debt and equity), board and investor reporting, tax strategy, and financial controls. At growth-stage companies, the CFO also typically owns legal, compliance, and sometimes HR administration.
The CFO is the financial co-pilot to the CEO — translating operational decisions into financial implications, managing the relationship with investors and the board, and ensuring the company has the capital and controls to execute its strategy.
CFO — Role at a Glance
When to Hire a Full-Time CFO
Most startups do not need a full-time CFO until Series B or C, when the financial complexity of the business (multiple revenue streams, sophisticated investor reporting, covenant management) justifies the role. Before that, a strong VP of Finance or fractional CFO provides adequate financial leadership at a fraction of the cost.
The signal that a full-time CFO is needed: the company is preparing for a large equity round ($50M+), exploring debt financing, managing complex multi-entity structures, approaching an IPO pathway, or considering M&A activity. These all require the depth and board-level credibility that only a full-time C-suite CFO provides.
“Founders often delay the CFO hire because they don't feel the pain yet. They feel it when they're in a fundraise with no credible financial story, or when the board asks a question about unit economics that no one can answer cleanly. The CFO hire is always more urgent than it feels.”
CFO Profiles by Company Stage
Startup CFO ($0–$10M ARR): Typically a VP of Finance or strong controller who manages reporting, cash, and investor communications. Often fractional. Series B/C CFO ($10M–$75M ARR): An experienced operator who has run FP&A, managed board reporting, and ideally been through a major fundraise. Full-time, strategic peer to the CEO.
Pre-IPO CFO: A specialist who has prepared companies for public market entry — with SEC reporting experience, SOX compliance knowledge, and relationships with IPO underwriters and public market investors. Often a very different hire from the growth-stage CFO who preceded them.