How much does a fractional CFO cost?

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The honest answer is that it depends on scope, but the range is narrower than most owners expect. Here is how fractional CFOs charge, what moves the price, and how to tell if you are ready.

Ask five fractional CFOs what they charge and you will get five different answers. That is not evasiveness. It is because "fractional CFO" covers everything from a few hours of forecasting help a month to deal support on a multi-million dollar acquisition. This guide lays out the three pricing models you will actually encounter, what pushes the price up or down, and the signals that you are ready.

The three pricing models

Hourly. Typically $200 to $400+ per hour for experienced fractional CFOs. Hourly works for defined questions: a second opinion on a deal, a one-time forecast review, a pricing analysis. It gets expensive fast as ongoing support, which is why most firms steer monthly work into retainers.

Monthly retainer. The most common model for ongoing support. For small businesses, retainers generally fall between $2,000 and $7,500 per month, depending on hours and complexity. A light engagement (monthly close oversight plus a forecast review) sits at the low end. A heavy one (weekly involvement, multiple entities, lender reporting) sits at the high end. The right comparison is not the sticker price but the cost of a full-time CFO: $200,000+ in salary plus benefits, or roughly $17,000+ per month before you count equity and overhead.

Project-based. A defined deliverable for a defined fee. A bookkeeping cleanup, a 12-month forecast build, or a quality-of-earnings report typically runs $3,000 to $15,000 depending on the mess involved and the depth of the deliverable. Projects are the right choice when you know exactly what you need and do not need someone every month.

What drives the price

Four things move every quote: hours per month (the biggest driver), complexity (multiple entities, locations, or inventory add work), transaction support (diligence and deal work is priced differently from steady-state finance), and the state of your books (a cleanup has to happen before forecasting, and honest firms will tell you that upfront).

How to tell if you are ready

You do not need a specific revenue number, but most businesses start seeing a clear return once decisions routinely involve five- and six-figure swings: hiring, expansion, pricing changes, equipment, debt. If a single bad call costs more than a year of fractional support, the math is already in your favor. Other signals: you cannot see more than 30 days of cash ahead, your CPA only talks to you in March, or you are considering buying, selling, or raising capital in the next two years.

The math that matters

Do not compare the retainer to zero. Compare it to the cost of the mistake it prevents: one over-hire, one mistimed expansion, one valuation haircut from messy books. Fractional CFO support pays for itself the first time it stops a bad decision or catches an opportunity your P&L was hiding.

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