A fractional CFO gives an early-stage startup real finance leadership without the $300K+ full-time cost.
A fractional CFO is a senior finance leader who works part-time across a small portfolio of companies, typically 8-20 hours per month per client. For startups between Seed and Series B, fractional CFOs bridge the gap between a bookkeeper (transaction categorization, payroll, basic reporting) and a full-time CFO ($250K-$400K+ all-in, appropriate only past ~$20M ARR). The right fractional CFO changes fundraising outcomes, board relationships, and unit economics decisions.
Trigger points: (1) Preparing for a priced round — investors will ask for a real financial model, cap table clean-up, and diligence-ready data room. (2) ARR crosses ~$1M and unit economics decisions (pricing, sales comp, hiring plan) start to matter financially. (3) Board meetings need real finance content beyond 'here's cash burn.' (4) Any regulated activity — R&D tax credits, SAFE-to-priced conversions, international expansion — where mistakes are expensive. Before those triggers, a bookkeeper + founder judgment is usually enough.
Standard scope: (a) Financial model and scenario planning — the living document driving hiring, spending, and fundraising decisions. (b) Monthly close review — bookkeeper produces, CFO reviews for accuracy and reasonableness. (c) Board reporting package. (d) Fundraising support — model, projections, data room, diligence responses. (e) Cap table hygiene, 409A oversight, option grants. (f) Vendor/tooling decisions (accounting stack, payroll, treasury). Not scope: day-to-day AP/AR, payroll processing, expense management — those belong to a bookkeeper or ops person.
US market rates: (a) Firms (Burkland, Zeni, Pilot's CFO tier, Kruze) — $3K-$8K/month depending on scope. (b) Independent fractional CFOs — $4K-$12K/month, often more capable and personalized but with concentration risk. (c) Equity — some fractional CFOs take 0.1-0.5% equity in lieu of or supplementing cash. Equity-only arrangements rarely work well; the incentive alignment is too weak for the hours involved.
Look for: (a) Directly-relevant experience — a SaaS company should hire a SaaS-experienced CFO, not a generalist who's mostly done services businesses. (b) Fundraising track record — model VCs actually respected, not academically-perfect models. (c) Reference calls with current portfolio, especially recent hires. (d) Willingness to be in board meetings and take direct questions. Avoid: firms that assign a junior 'account manager' as your CFO — you need the actual senior person.
Typical trigger: post-Series B (~$20M-$30M ARR), fundraising cadence tightens, board reporting expectations expand, treasury/tax/legal complexity require full-time attention. The fractional CFO ideally helps recruit the full-time replacement and stays on in an advisory capacity for the transition.
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