The total cost of one fractional hire

A fractional CMO retainer at $7k/mo is rarely the actual cost. The bookkeeping says $84k/year. The real number — including downstream agency spend, founder time, and missed cadence — is closer to $180-240k.

For operators evaluating senior fractional or part-time hires

This paper is for founders considering a $5-10k/mo fractional senior hire (CMO, CFO, COO, VP-level) at a 5-50 person company. It is for the budget conversation, not the talent conversation. The talent in this market is fine; the math around the talent often is not.

The bookkeeping number

A $7k/mo fractional CMO costs $84k/year on the contract.

That number shows up in the budget. It is also wrong.

The actual cost

The actual cost has four components. The bookkeeping number is one of them.

Component 1: The retainer itself. $7k/mo × 12 = $84k/year. This is real and visible.

Component 2: Downstream agency or freelance spend. A fractional CMO does not ship the work. They ship the brief. The work is shipped by an agency, freelance writer, or junior in-house — at $4-8k/mo additional spend. Annualized: $48-96k.

Component 3: Operator time managing the layers. The fractional CMO needs briefing on context, weekly syncs, and review cycles. The agency below them needs the same, plus translation between the CMO's strategy and the agency's execution. Operators typically spend 4-8 hours per week on this layer cake. At a $300/hr loaded operator rate, that's $5,200-10,400/mo, or $62-125k/year.

Component 4: Cadence cost. A fractional engagement has cadence overhead — the kickoff, the rhythm-finding period, the eventual ramp-down — that produces less output per quarter than the equivalent contiguous time. Most fractional engagements lose 1-2 quarters of effective output to ramp + handoff costs. At an estimated $30-60k per lost quarter of output, this is $30-120k/year.

Total: $224-425k/year. The retainer is 19-37% of the actual cost.

Why operators consistently underestimate this

The bookkeeping number is what hits the income statement. Components 2-4 are real cash and real time but they show up in different places — the agency budget, the operator's calendar, the variance between projected and actual quarter output. None of them get associated back to "we hired a fractional CMO."

The first time most operators see the full number is when they calculate it after the engagement ended.

The decision the math is for

Operators often face a choice between:

• $7k/mo fractional CMO + $5k/mo agency + ~6 hrs/week of operator time
• $84k/year associate-level in-house marketer + ~2 hrs/week operator time
• $250k full-time CMO + their own team
• $199/mo AI executive (GROWTH) + ~1 hr/week operator audit

The bookkeeping numbers say the first option is cheapest. The total-cost numbers say the order is roughly:

| Option | Bookkeeping | Total cost (with operator time + downstream + cadence) |
|---|---|---|
| Fractional CMO + agency | $144k | $224-425k |
| In-house associate marketer | $84k | $130-180k |
| Full-time CMO + team | $250-400k | $300-500k |
| AI executive (GROWTH) + audit | $2,388 | $18-30k |

The AI executive line shows the same time-included math: $199 × 12 + ~1 hr/week × $300/hr × 52 weeks = ~$18k. Operators sometimes assume this number is too low because the visible price is too low. The total-cost framing makes it less surprising.

What this is not

This is not an argument that fractional hires are wrong. They are right for specific shapes — companies with the execution layer already in place, transitions where a senior comes in for 60-90 days to set up a rhythm, situations where the operator's primary need is strategic input and they have execution capacity to absorb it.

This is an argument that the bookkeeping number is consistently wrong, and operators making the decision on the bookkeeping number alone are systematically choosing more expensive options.

How to do the math yourself

For any fractional or part-time hire you're considering:

1. Bookkeeping cost: contract value × 12.
2. Downstream cost: agency / freelance / contractor spend the role will require.
3. Operator time: hours/week managing the layer × 52 × your loaded operator rate (default $300/hr).
4. Cadence cost: your honest estimate of lost output during ramp + handoff.

Sum the four. That's your total cost.

Then ask the question Component 4 implies: against this total cost, what other configurations of the same function would produce equal or greater output?

Most operators who run this exercise on a current or planned fractional engagement find the total cost is 2.5-5× the bookkeeping cost. Some find that the bookkeeping cost was the right number — the engagement is well-matched, the execution layer is in place, the math works. The point of the calculation is to know which case you're in.