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Fractional CMO cost in the UK: what you're paying for

Price the outcome, not the hours.

Fractional CMO cost in the UK comes down to three things: how much senior time you buy each month, what that person is responsible for, and whether the people who do the work come with them. Compare quotes on those three, not on the headline figure, and ask for a fixed monthly price agreed before anything starts.

Josef Winstone, Founder & Managing Director, Foundry Agency

By Josef WinstoneFounder & Managing Director · 6 min readUpdated

How much does a fractional CMO cost in the UK?

It depends on the arrangement, and arrangements vary a lot. Two days a month advising a founder is a very different job from leading a launch, managing three agencies and reporting to a board.

So rather than quote a range that would be wrong for most readers, this guide explains how fractional CMOs price and what pushes the cost up or down. Use it to work out what you need, then ask for a fixed price for that.

How do fractional CMOs charge?

You'll see three models. Each suits a different situation.

  • Monthly retainer: a fixed fee for an agreed amount of time and responsibility each month. The most common model, and the easiest to budget for.
  • Day rate: you pay for the days used. Flexible, but harder to budget, and it can reward time spent rather than progress made.
  • Project fee: a fixed price for a defined piece of work, such as a go-to-market plan or a launch. Good when the job has a clear end.

What pushes the cost up or down?

Seven things decide most of the price.

  • Time: days or hours each month, and how fixed they are.
  • Responsibility: advising the founder costs less than owning targets and reporting to a board.
  • Delivery: strategy only, or a CMO who comes with people to build the website, run the ads and write the content.
  • Team leadership: managing your in-house people or several agencies takes time.
  • Stage and pace: a launch or funding round needs more input than a steady quarter.
  • Investor work: board packs, decks and the marketing numbers investors ask for.
  • In person or remote: travel and on-site days add time.

Is a fractional CMO cheaper than hiring?

For most growing businesses, yes, because you're buying part of someone's time rather than all of it. But compare the full picture. A hire carries salary plus employer costs such as National Insurance and workplace pension contributions (GOV.UK sets these out), recruitment time, and the risk of the wrong hire.

On the other side, a fractional CMO is splitting their week. If you need someone in every meeting, every day, a full-time hire may be the better buy. Many businesses use a fractional CMO until they're big enough to justify that hire, then use them to make it.

One more check: if you engage someone through their own limited company, the off-payroll working rules (IR35) may apply. GOV.UK explains who decides status, and it depends on the size of your business.

How do you compare fractional CMO quotes?

Follow these six steps and you'll be comparing like with like.

  1. Write down what you need the CMO to own: the plan, the budget, the team, the board report, or all of it.
  2. Ask each candidate how much time that takes them each month, and what happens in a busy month.
  3. Ask who does the work once the plan is agreed, and whether that's in the price.
  4. Ask for a fixed monthly price and a written scope, not an estimate of hours.
  5. Check the terms: notice period, minimum term and a review point after the first quarter.
  6. Add up the total: their fee plus any agencies or freelancers you'll still need to hire to deliver the plan.

What's the hidden cost of a cheap fractional CMO?

The plan with nobody to deliver it. A low monthly fee looks good until you're also paying three agencies to do the work, and spending your own time finding and briefing them.

Judge the price against what moves: enquiries, pipeline, sales, and how much of your own time it frees up.

How does Foundry price a fractional CMO?

A short call with Josef first, then a written plan and a fixed monthly price agreed before we start. The price covers Josef's time as your fractional CMO, and the Foundry team does the delivery: website, ads, SEO, content and PR, without you hiring separate agencies.

You get weekly check-ins, WhatsApp or Slack for everything in between, and a report on the 1st of every month. Each quarter we review it together: keep going, scale up, or hand over to a hire we help you make.

Our averages. Not our best days.

Our averages

  • 5days

    Website, kick-off to live

  • 3hours

    Google Ads setup

  • 4hours

    Meta Ads setup

  • 7days

    To a first PR feature

  • 20mins

    Average reply time

Fractional CMO cost FAQs

  • Both exist. A monthly retainer is the most common because it's easier to budget for. A day rate suits occasional input, and a project fee suits a job with a clear end.

  • Many fractional CMOs ask for one, because the first few months are spent on the audit and the plan. Agree the minimum term and the notice period in writing before you start.

  • Often not. Many fractional CMOs set the strategy and manage others. Foundry's includes the team to do the work, so check what each quote covers.

  • It can be, if marketing decisions are landing on the founder and money is going into channels nobody can prove work. If you don't yet know who your customer is, it's too early.

  • Yes. That's one of the main reasons to go fractional. Start with the time you need now and review it each quarter.

  • It can, if you engage an individual through their own limited company. GOV.UK's off-payroll working guidance explains the rules. Engaging an agency for a service is a different arrangement, so take advice for your situation.

Want a fixed monthly price? Get moving.

Tell us what you need. We'll reply within the hour (working hours), and most websites go live about 5 days after kick-off.

We'll reply within the hour (working hours).

Or email hello@foundryagency.co.uk

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