How are fractional CFO and outsourced accounting firms usually priced?

Monthly retainer: quoted in 53 of 90 answers, median $2,000–$15,000. Hourly rate: quoted in 25 of 90 answers, median $150–$450. One-off project fee: quoted in 3 of 90 answers, median $450–$2,000.

Where do these figures come from?

They are transcribed from 90 ChatGPT answers collected August 8, 2026–August 21, 2026, then counted. The Shortlist Report does not survey firms, set prices, or verify that any firm charges these amounts — it reports what the assistant said, with the sample size stated and the underlying counts published as CSV and JSON.

How much does a fractional CFO cost per month?

What a Fractional CFO Actually Costs

Monthly retainer: $2,000–$15,000. That was the most-quoted figure, appearing in 53 of 90 AI answers.

The Shortlist Report · Published August 8, 2026 · Updated August 21, 2026

90ChatGPT answers

54Stated a price

3Pricing models

$2,000–$15,000Most-quoted

Based on 90 ChatGPT answers to this question, collected August 8, 2026–August 21, 2026. 54 of them stated a figure. Each answer counts once per pricing model. How we measure.

Key findings

Monthly retainer was the most-quoted way to price fractional CFO and outsourced accounting firms: $2,000–$15,000 per month, appearing in 53 of 90 ChatGPT answers to “How much does a fractional CFO cost per month?”, collected August 8, 2026–August 21, 2026.
Hourly rate was quoted in 25 of 90 ChatGPT answers, at a median of $150–$450.
One-off project fee was quoted in 3 of 90 ChatGPT answers, at a median of $450–$2,000.
54 of the 90 sampled answers stated a price at all; the remaining 36 answered “How much does a fractional CFO cost per month?” without naming a figure.
These are counts of what ChatGPT said, not a rate card. The Shortlist Report does not set, collect or verify prices, and no firm paid to influence these figures.

What the answers quoted

Typical range is the median of the quoted low bounds and the median of the quoted high bounds — not an average, which one outsized enterprise quote would distort. Full spread is the 10th to 90th percentile of what was quoted, so a single misread figure cannot stretch it. Share is the percentage of all 90 sampled answers that quoted this model, counted once each.
Pricing model	Typical range	Full spread	Answers
Monthly retainer$/month	$2,000–$15,000	$400–$20,000	53 of 90
Hourly rate$/hour	$150–$450	$150–$500	25 of 90
One-off project fee$ per project	$450–$2,000	$450–$2,000	3 of 90

How to read this

The models are not alternatives to choose between. A single engagement often combines them — a monthly retainer plus a percentage of ad spend is the most common pairing in this sample — so the shares add up to more than 100% and are meant to.

The typical range is where the middle of the sample sits, not a quote. Half the answers quoted a low bound below $2,000, and half above. Treat it as the number to walk into a conversation already knowing, not the number to expect on a proposal.

What this measurement does not tell you

These are not quotes and not a rate card. No firm was surveyed and no price was verified. This is what ChatGPT said when asked, which reflects what has been published about pricing online.
Prices follow scope, not category. The same label covers a one-person account audit and a full retail-and-advertising operation. A range this wide is telling you the category has no standard scope.
36 of 90 answers named no figure at all. Pricing is not consistently answered, and a page that reported only the answers containing numbers would overstate how settled this is.
It is a reading from a date range. Collected August 8, 2026–August 21, 2026 on ChatGPT only.

Cite this report

The Shortlist Report. (2026). What a Fractional CFO Actually Costs. The Shortlist Report. https://www.shortlistreport.com/article/fractional-cfo-cost

Underlying counts: CSV · JSON. Every answer they were counted from: plain text · JSON. All reusable under CC BY 4.0 with attribution.