Glossary · Finance operations
Fractional controller vs. fractional CFO
Two part-time roles that companies confuse, and the stage at which each one is the right hire.
A controller owns the accounting: the close, the estimates, the technical memos, the audit, and the reporting. A CFO owns the capital: the financing strategy, investor relations, the board relationship, and the operating plan. Early-stage biotechs need the first before the second, because there is no capital strategy without reliable numbers, and most founders try to solve both with one person.
A fractional arrangement provides a senior person for a fraction of the week, at a fraction of the cost of a full-time hire, with the elasticity to expand around a financing or an audit. It works when the scope is clear and the company has, or will hire, the day-to-day bookkeeping and accounts payable capacity underneath.
The transition to full-time usually comes with the IPO or a large late-stage round, when the reporting cadence and the investor demands justify a permanent team. Until then the question is not controller or CFO but which problems the company has this year.
General explanation, not accounting, tax, or legal advice for any specific company. Standards and tax law change; the entry reflects my understanding as of September 2026.