What does a CMO really cost? The number founders get wrong

That number's wrong.

On a £150,000 salary, year one costs about £220,000 in cash once you add employer NI, a minimum pension contribution and a retained-search fee at 30%, the midpoint of the usual 25% to 35% range. It's usually three to six months before a new CMO moves a number, so £55,000 to £110,000 of that is spent before you know whether it's working. And that's before they've hired the team they'll tell you they need.

The quick answer: a full-time UK CMO on a £150,000 salary costs about £220,000 in year one once NI, pension and a search fee are added, and senior hires run past £300,000. A fractional CMO costs £750 to £1,400 a day, or £3,000 to £16,000 a month on retainer depending on your stage. The rest of this page is what those numbers don't tell you.

Why does this matter more in 2026?

Because the money's tighter. Total UK fintech investment, including M&A and private equity, fell to £1.8bn in the first half of 2026, down from £5.0bn a year earlier and the lowest since 2016, across the fewest deals in a decade (KPMG, August 2026). When rounds are smaller, a £220,000 hire that takes two quarters to show anything is a much bigger bet than it was in 2021.

Why does a full-time CMO cost so much more than the salary?

Because the salary is only the first line. Base pay for a UK CMO runs from about £130,000 to £380,000. Then come roughly 15% employer NI, a retained search fee of 25% to 35% of salary, pension, bonus, and a quarter or more of ramp before they're fully up to speed.

At the senior end, The Marketing Centre, which itself sells fractional CMOs, puts year-one all-in cost at £300,000 to £450,000+, via Fractional Quest. Using a £147,000 salary, Fractional Quest's own calculator puts the break-even at about 3.8 days a week: below that, a fractional CMO at £1,100 a day costs less. One thing the comparison hides: depending on how hands-on your fractional CMO is, you may still need someone for volume work, usually an agency or a marketer from about £3,500 a month, so check before you budget.

What do fractional CMOs charge in the UK?

Seed-stage companies usually pay £3,000 to £5,000 a month, Series A to B pay £7,000 to £12,000, and later-stage or PE-backed companies £15,000 or more. Day rates sit between £750 and £1,400, with London at the top of that range and above it.

Retainer bands from Porter Wills' 2026 guide and The Marketing Centre, via Fractional Quest. Day rates from Connectd (April 2026), same page. Fractionus puts UK CMO retainers at £6,000 to £16,000 a month.

What's the cost nobody puts in the spreadsheet?

Time. Specifically, the six months between hiring marketing leadership and finding out whether any of it works.

That's the expensive bit, whichever route you take. A brilliant full-time CMO can spend two quarters building a team before anyone knows which channel brings in customers who stay. A cheap fractional one can spend the same two quarters sending you reports nobody acts on.

So the better question isn't what does this cost. It's this: if I spend the money, will I know in ninety days whether it worked? If you can't answer yes, the day rate barely matters.

What changes what a fractional CMO costs?

Days. Not how many you can afford, how many the problem needs. A launch might need two days a week for eight weeks, then half a day once it's running.

Whether they own the number. The one founders miss. An advisor who tells you what to do costs less than someone accountable for the result. Both are fine, but your board will judge them differently, so know which you're buying.

How much they do themselves. Some only direct. Others write the brief, set up the tracking, run the first campaign and hand it over. The second costs more per day and usually less overall, because nothing sits waiting.

Your stage. Pre-revenue, it's positioning and finding one channel that works. Post-revenue, it's unit economics, retention and getting the team to run without you in every decision.

What does this look like for a £2m seed round?

Here's the year-one cost of three common setups, as a share of a £2m raise. Media spend is extra in every case.

Both salaried rows assume a 30% search fee, so change the fee, pension or bonus and the totals move. The last two cost about the same, which surprises most founders. The difference is what you're buying. The head of growth gives you more hands-on hours on a channel you've already chosen. The fractional setup gives you someone senior deciding which channel and doing much of the work, with an agency adding volume, and you can stop either part with a month's notice. The full-time CMO costs half as much again, and the team they'll want comes on top.

How does RBX Strategy price fractional CMO work?

I don't publish a retainer figure, because it depends on two things I can't know before I've looked: how many days the problem needs, and whether I'm owning the number or advising. The diagnostic answers both. It's paid because it's two weeks of real work, and you keep the plan whether we carry on or not. Start with the scorecard.

So what should go in the hiring plan?

Not £150,000 next to CMO. If you're pre-seed or seed, budget the lower fractional band and spend the first month finding out what's actually broken. If you're post-Series A with a team to lead, budget one to two days a week. Hire full-time when the role needs roughly four days a week or more and you can fund it for two years. With UK fintech funding at its lowest since 2016, that second condition is harder to meet than it was, which is a big part of why more founders are starting fractional.

And whichever you choose, put one more line in that spreadsheet: how you'll know, in ninety days, that it worked.

How do you know in ninety days whether it's working?

Agree this scorecard before anyone starts, whoever you hire. If a milestone is missed, ask why that week, not at the quarterly review.