What Does a Fractional CMO Actually Do, Week to Week?
In short: A fractional CMO runs your marketing operating rhythm on two to four days a month: a monthly strategy and trading review, weekly check-ins with the team, agency performance management, budget decisions, and commercially honest reporting. They don't run ads or write emails — they direct the people who do, and own whether the whole thing is profitable.
"Fractional CMO" is an easy title to hide behind, which is why the question in this page's title is the right one to ask anyone you're about to hire. This guide — part of our full Fractional CMO for eCommerce pillar — sets out what the job looks like in practice for a £2–£15M brand, so you can compare it against what you're actually being offered.
What is the job, in one paragraph?
The job is to be the senior commercial owner of marketing. That means setting the strategy and budget, deciding what gets funded and what gets stopped, defining the metrics that matter — blended efficiency, contribution margin, cash — and holding the team and agencies accountable to them. In an eCommerce business it also means keeping marketing honest with the rest of the machine: demand plans the stock can support, promotions the margin can afford, growth the cash flow can survive.
What happens in the first 90 days?
Month one is diagnosis. Into the numbers: P&L, channel economics, CAC against LTV, repeat rates, discount dependency, stock position. Into the people: what the team is capable of, what the agencies are actually delivering for their retainers. The output is an unvarnished picture of where money is being made and lost.
Month two is the plan. Priorities ranked by commercial impact, budget reallocated, metrics and owners assigned, agency briefs rewritten against commercial outcomes. Usually a handful of things are stopped — the pet project, the channel kept alive by sunk cost, the always-on discount.
Month three is cadence. The operating rhythm below becomes routine, the first wins are banked, and the founder has a scorecard they trust for the first time. That diagnosis-first sequence is exactly how the DMZ engagement on our Fractional CMO page ran — chaos to clarity, in their words.
What does a typical month look like on 2–4 days?
The days are few, so they are structured. A representative month:
| Week | Focus | What actually happens |
|---|---|---|
| Week 1 | Trading & strategy review | Half-day with the leadership team: last month's blended numbers against plan, margin and cash check, decisions on budget, pricing and priorities for the month. |
| Week 2 | Team & execution | Check-in with marketing and buying: the plan is moving, blockers cleared, tests reviewed and the next ones structured properly. |
| Week 3 | Agency accountability | Performance reviews against the commercial brief — not the agency's own deck. Scope, spend and creative decisions made while there's still a month to act on them. |
| Week 4 | Forward planning | Next month's forecast, campaign and launch calendar, stock alignment with the demand plan, and the board-level reporting pulled together. |
Between days, a good fractional CMO stays reachable for the decisions that can't wait a week. What they refuse to become is a daily execution resource — the economics of that are covered in what a fractional CMO costs.
What do they own — and what does your team own?
The line is judgement versus execution. The fractional CMO owns strategy, budget allocation, the metric definitions, agency selection and accountability, pricing and promotion policy, and the integrity of the reporting. Your team and agencies own the doing: campaigns built, ads run, emails sent, content shipped, orders fulfilled.
The boundary is a feature, not a limitation. When the senior person also does the execution, you get expensive execution and rushed judgement. When the boundary holds, the whole machine speeds up — decisions stop queueing behind a stretched founder, which for most owners is the first benefit they actually feel.
What does a fractional CMO not do?
They don't run your ad accounts, write your email flows, design your creative or manage your Shopify admin — that work belongs with your team or agencies at execution rates, and an agency is often the right answer for it (see fractional CMO vs agency). They are also not an interim CMO working full-time through a transformation, and not a mentor — if you're under roughly £500k and doing most things yourself, mentoring is the better-shaped engagement.
Anyone offering to be all of these at once on three days a month is describing a job that cannot be done. That's one of the five red flags when hiring a fractional CMO.
How do you know it's working?
Hold them to visible artefacts on a timetable. By the end of month one: a written diagnosis you recognise as true. By month two: a plan with priorities, owners and a reallocated budget. By month three: the operating rhythm running and a scorecard you trust. By month six: blended efficiency and contribution margin measurably better, and the founder demonstrably out of the marketing-director seat.
If after a quarter you have activity but no artefacts — no scorecard, no plan, no stopped projects — you have bought meetings, not leadership.
See how a Headland engagement works →
FAQs
What does a fractional CMO do day to day?
On their committed days they run the marketing operating rhythm: a monthly strategy and trading review, weekly check-ins with the team, agency performance management, budget and forecast decisions, and the reporting that shows whether growth is profitable. Between days, they are reachable for decisions that can't wait.
What happens in the first 90 days with a fractional CMO?
Month one is diagnosis: the numbers, the channels, the team, the stock position. Month two is the plan: priorities, budget reallocation, metrics and ownership. Month three is cadence: the operating rhythm running, early wins banked, and a scorecard the founder trusts.
Does a fractional CMO do hands-on work like running ads?
No — and that's deliberate. They direct the people who do: your team and agencies. Buying execution at CMO rates is poor economics; the model works because a small amount of senior judgement steers a larger amount of affordable execution.
How do I know if my fractional CMO is working?
Within a quarter you should see a scorecard you trust, a plan with clear priorities and owners, agencies reporting against commercial metrics rather than channel vanity numbers, and the founder making fewer marketing decisions. Within two quarters, blended efficiency and contribution margin should be moving.
How many days a week does a fractional CMO work with you?
Typically the equivalent of half a day to one day a week — sold as two to four days a month. That is enough to own strategy and hold the rhythm, while your team and agencies carry the daily execution.