The rule we give founders: hire a full-time CMO when you have repeatable revenue and need someone accountable for pipeline every single day. Before that point, a full-time CMO is an expensive way to buy thinking you only need part-time. Rent the judgement, keep the salary.
Here is the logic, and the honest version of both sides.
What a CMO is actually for
A CMO exists to own a number and run a function: pipeline targets, a team, a budget, board accountability. That job makes sense when there is a function to run: a proven motion, a team executing it, and enough spend that daily senior ownership pays for itself.
What founders usually need earlier is different: positioning, a go-to-market strategy, a first team design, and someone senior to stop them wasting money. That is project work and part-time leadership, not a full-time executive role. Confusing the two is how companies end up with a £150k+ hire spending their first six months writing strategy documents a consultant would have delivered in six weeks.
The signs you are ready to hire full-time
You have repeatable revenue from at least one motion, not just founder-sold deals. Marketing spend is meaningful enough that daily optimisation matters. There is a team of two or more that needs managing. The board is asking for a marketing number every quarter. Sales is scaling and needs a peer, not a supplier. If you tick most of those, hire, and hire senior: a weak CMO at that stage costs more than a strong one.
The signs you are not
Marketing is one person or nobody. You cannot articulate your positioning in two sentences. You have never validated a channel beyond founder network. You want a CMO to "figure out marketing": that is the tell. Figuring it out is a defined piece of work with an end date, not a permanent seat. Do the work first, then hire the person to scale what works.
The fractional middle, honestly
A fractional CMO gives you the judgement layer at one to two days a week: strategy, team leadership, board reporting, vendor management. It is the right model roughly between first revenue and £5m to £10m ARR.
The honest limits: a fractional leader cannot be in every deal review, cannot out-hustle a great full-timer at scale, and the model fails if you treat two days as five. The best fractional engagements have an exit built in: define the function, prove the motion, then hire the full-time CMO into a job that is now well-defined, often with the fractional lead helping run the search.
The maths, briefly
A full-time CMO in the UK or Western Europe costs £150k to £250k plus equity, and a mis-hire costs a year. A fractional arrangement runs a fraction of that with no severance risk. Below repeatable revenue, the expected value strongly favours renting. Past it, ownership wins: at scale, the daily presence compounds.
Related
Frequently asked questions
At what revenue should a startup hire a CMO?
Most B2B companies are ready somewhere between £5m and £10m ARR, when a proven motion, a real team and meaningful spend need daily senior ownership. Before that, fractional leadership usually delivers more per pound.
What is the difference between a fractional CMO and a consultant?
A consultant advises and leaves. A fractional CMO takes ownership: leads the team, owns the plan and reports on the number, on a part-time basis.
What does a fractional CMO cost?
Typically a fixed monthly fee for one to two days a week, a fraction of a full-time package with no equity, notice period or severance exposure.
What should a first CMO's mandate be?
Scale what is proven. If the mandate is "figure out marketing", the company is not ready for the hire; it is ready for a strategy engagement.