When to hire a fractional CFO.

The most reliable signal. The finance needs of a business change discontinuously at certain revenue thresholds.

Headcount is a proxy for organizational complexity. Once a company crosses roughly 30 employees, the cost of miscalibrated hiring, poorly designed compensation plans, and unclear headcount planning becomes material. A fractional CFO owns these decisions.

At 50 – 100 employees, the finance function typically needs at minimum a fractional CFO plus a controller. Beyond 150 employees, most companies require a full finance team.

Fundraising is the single most common reason companies engage a fractional CFO. Institutional investors expect a defensible financial model, a clean data room, credible unit economics, and a finance executive who can answer diligence questions on the same call the questions are asked.

The correct time to engage a fractional CFO for a raise is four to six months before the round. Engaging one month before a raise is possible but constrains what the CFO can deliver — clean historicals take time.

Cash flow becomes non-trivial when the business acquires structure: deferred revenue, inventory, accounts receivable of any scale, foreign currency exposure, or seasonality. At that point, a thirteen-week cash forecast becomes a leadership tool, not an accounting exercise.

A useful test: if leadership cannot answer "what will our cash balance be in eight weeks?" within an hour, the company is past the point where a fractional CFO is warranted.

Opening a foreign subsidiary, hiring international employees, or invoicing customers in a foreign currency introduces tax, transfer pricing, foreign exchange, and consolidation complexity. Each of these decisions is CFO-grade — errors compound over years and are expensive to unwind.

Any transaction — acquiring a competitor, being acquired, divesting a business line, or restructuring the cap table — requires executive finance leadership. A fractional CFO with transaction experience manages the diligence process, negotiates commercial terms, and integrates or separates the resulting entities.

Venture debt, revenue-based financing, asset-based lending, and traditional bank debt each carry covenants, reporting requirements, and consequences that require ongoing executive management. The moment leadership begins evaluating debt financing, a fractional CFO should be in the room.

The moment a company seats an outside board — investor directors, an independent chair, an audit committee — the standard for financial reporting rises. Boards expect investor-grade quarterly materials, prepared and presented by an executive.

It is rare for a growth-stage board to accept a bookkeeper or an internal analyst as the finance representative. A CFO — fractional or full-time — is expected.

If two or more of the following are true, a fractional CFO is likely the correct next hire. If four or more are true, the company is already past the point at which one should have been engaged.