Fractional CFO vs accounting-firm advisory.
Accounting firms sell client advisory services. A fractional CFO sells decisions. Both are legitimate; they solve different problems, and plenty of businesses need both.
| Accounting firm (CAS) | Zenith Fractional CFO | |
|---|---|---|
| Core deliverable | Clean books, compliance, filings | Decisions: pricing, hiring, cash, financing |
| Orientation | Backward-looking: records what happened | Forward-looking: forecasts and acts |
| Cash forecasting | Rarely included; often an add-on | 13-week forecast, refreshed weekly |
| Who does the work | Staff accountants, partner reviews | CFO-level operator with analyst support |
| Billing model | Hourly or tiered service packages | Flat monthly retainer, no hourly meter |
| Tax and audit | Yes, this is their home turf | No; we work alongside your accountant |
When the accounting firm is the right answer
If the books are months behind, filings are at risk, or you have no bookkeeping function at all, start there. Reliable books are the foundation; nobody can forecast from records that do not close.
Once the books close cleanly every month and the question becomes what to do about the numbers, that is CFO work. We regularly work alongside our clients' accountants: they keep the record straight, we own the forecast and the decisions built on it.
Common questions
Do I still need my accounting firm if I hire a fractional CFO?
Yes. Your accountant owns compliance, tax filings, and, if needed, audit or review work. A fractional CFO consumes their output and turns it into forecasts and decisions. The two roles are complementary, and a good fractional CFO makes your accountant more effective by keeping the books decision-grade all year.
My CPA firm offers CAS or virtual CFO services. Is that the same thing?
Client advisory services from an accounting firm are usually enhanced bookkeeping plus periodic reporting, delivered by staff accountants under a partner. It is valuable, but it is not the same as an operator who has run finance inside businesses, sits in your decisions, and owns a cash forecast. Ask who exactly will be in your monthly meeting and what decisions they have personally made.
When is accounting-firm advisory the better choice?
If your books are behind, your filings are at risk, or you mainly need compliance capacity, start with the accounting firm; that is the foundation. A fractional CFO adds the most value once the books are reliable and the constraint is judgment, not record-keeping.