The comparison usually gets run as two numbers on a page: a salary on one side, an engagement fee on the other, whichever is smaller wins. That is the one version of this comparison that cannot be right, because the two models do not carry the same costs, do not start producing at the same time, and do not absorb the same risk when the decision turns out to be wrong.
The number on the offer letter is not the cost of the seat
A full-time marketing leader's base salary is the visible part of a much larger figure. Sitting on top of it, in every case: employer payroll taxes, the benefits load, and whatever bonus or equity the offer carries. Sitting in front of it: a recruiting fee, conventionally quoted as a share of first-year compensation, and the weeks or months the role stays open while the search runs.
That last cost is the one that never makes the spreadsheet. An empty seat is not free — it is the period in which nobody senior is deciding where the spend goes, and the spend keeps going anyway. For a multi-unit operator running paid media across dozens of locations, an open marketing leadership role is not a pause in cost. It is cost without direction.
A fractional engagement carries none of those lines. It also carries something a full-time hire does not: an end.
Ramp is a cost, and only one side pays it
A new full-time hire spends a first quarter learning things that are not output — the P&L, which locations behave differently and why, what the agency is actually contracted to do, which general managers answer the phone. That quarter is paid at full rate and produces mostly orientation. It is not a failure of the hire; it is what onboarding a leader into a multi-location system takes.
A fractional engagement is scoped before it starts, so discovery is the first deliverable rather than an unbilled prelude to one. The distinction is not seniority — both models can put an experienced operator in the room. The distinction is whether the learning period is priced as work or absorbed as overhead.
The two models absorb opposite risks
With a full-time hire, the operator absorbs the risk of being wrong. The cost of a mis-hire in a marketing leadership role is rarely a single severance number. It is the months before anyone is willing to say it out loud, because the failure mode is slow: spend keeps flowing, reports keep arriving, results stay flat, and nothing breaks loudly enough to force the conversation. Then the search starts again, and the seat is empty again.
With a fractional engagement, the vendor absorbs the risk of being replaceable. The scope is finite and the work has to show something inside it. If it is not working, the cost of stopping is a notice period rather than a year of drift and a second recruiting fee.
Neither arrangement removes risk. They put it on different sides of the table, and that is the part worth deciding deliberately.
When a full-time hire is the right answer
Often it is, and the comparison is not honest if it never says so.
Hire full-time when the work is permanent daily ownership — a marketing team that needs managing, production that belongs in-house, a calendar that requires somebody in every operating meeting, a culture that needs a person carrying it rather than visiting it. A leader who owns a function every day cannot be a leader who appears on a defined cadence.
A fractional arrangement fits the other shape: when what is missing is direction, priorities and a decision rhythm rather than headcount. It fits when there are already agencies, vendors and in-house staff doing work, and nobody senior enough to judge whether the work is the right work. It fits when the honest answer to "should we hire a CMO" is "we do not yet know what we would ask one to do."
How to actually run the comparison
Both columns have to be filled in the same units. A fully loaded annual cost against a monthly fee is not a comparison, it is a framing.
- Put the fully loaded annual cost of the full-time seat on the page — base, employer taxes, benefits, bonus and equity — not the base salary.
- Add the recruiting cost and a realistic time-to-fill, and treat the open months as a cost line rather than a gap.
- Write down what each option is expected to have produced by day 90, specifically enough that either could be judged against it.
- Write down what happens in month five if it is not working under each option, including who pays for that.
- Decide who owns the agency and vendor relationships in each case. If the answer is "the same person as today," neither option has solved the problem that started this.
Run that way, the comparison stops being about which number is smaller and becomes a question about permanence: whether this is a seat that needs filling forever, or a decision-making gap that needs closing now. Those are different problems, and only one of them is solved by hiring.
None of this requires deciding in advance which answer is right. It requires both columns filled in the same units, and both allowed to win — which is the same standard applied here before either one gets recommended.