What Is a Fractional CMO? And Does Your London Business Need One?

A fractional CMO is a part-time Chief Marketing Officer who provides senior marketing leadership without the cost of a full-time executive hire. They typically work 1–3 days per week, setting strategy, managing agency relationships, and aligning marketing to business goals. London fractional CMO rates run £1,500–£4,000/month.

What does a fractional CMO do?

• Sets the overall marketing strategy and aligns it to revenue targets
• Manages agencies, freelancers, and in-house marketing staff
• Owns the marketing budget and reports to the CEO/founder on ROI
• Builds marketing processes, tech stack, and measurement frameworks
• Hires and develops the marketing team as the company grows

Fractional CMO vs marketing agency

A fractional CMO sets the strategy; an agency executes the tactics. Many businesses benefit from both — a fractional CMO to provide leadership and an agency to do the hands-on work (SEO, ads, content, design). A fractional CMO without execution capacity is just a consultant with a title.

When to hire one

• You are spending £5k+/month on marketing but lack a senior marketing leader
• You have tried agencies but feel they lack strategic direction
• You are preparing for a funding round and need a credible marketing story
• You need to hire a marketing team but do not know what roles to fill first

When NOT to hire one

• You need someone to post on Instagram — that is execution, not strategy
• Your marketing budget is under £3,000/month — a fractional CMO fee on top will not leave enough for execution
• You have not validated product-market fit yet — strategy without traction is academic