That's the answer on paper. In practice it rarely feels that simple, because this isn't only a budget decision.

What's changed for agencies and CMOs in 2026?

Agencies are shrinking and changing how they charge. Forrester reported an average 8% headcount cut across agencies in 2025 and forecast 15% for 2026, with low-margin project work replacing the retainers agencies used to rely on (Forrester via Decision Marketing). For a founder, that means the team in the pitch may not be the team on your account six months later, so ask.

The CMO role is moving too. 65% of marketing leaders in Gartner's 2026 survey expect AI to substantially change it within two years (Gartner). And funding's tighter: UK fintech investment hit a ten-year low in the first half of 2026 (KPMG). All three point the same way. Keep commitments flexible until you know what you need.

Why does this decision feel so hard?

Because it's about control as much as cost. You've built the thing. Hiring a CMO feels like the grown-up move, a sign the company's real. Bringing in someone part-time can feel like settling. And handing your brand and your customers to anyone, full-time or not, means trusting them with the part of the business everyone can see.

At the same time, every month of runway you spend on payroll is a month you can't spend getting in front of customers. Most founders I've sat with aren't really choosing between two job titles. They're choosing between feeling covered and moving fast.

What does the full-time route usually look like?

Here's a pattern I've watched more than once, in fintech, gaming and crypto. It's a composite, not one client.

A founder closes a seed round and decides it's time for a proper CMO. The search takes three months. The hire is good, with a strong CV and the right instincts. Then the first thing they need is a team: a content lead, a designer, someone on paid, maybe an agency. That takes another quarter. Six months in, the brand looks sharper and the deck reads better, but campaigns have only just started and a good chunk of the raise has gone on salaries.

Nobody did anything wrong. The company just paid for leadership and infrastructure before it had worked out what actually brings customers in.

What does the fractional route look like?

The fractional version starts in weeks, not months. The first job is working out what to do: which channel brings customers who stay, what you can afford to pay for one, whether the plan still holds once the launch discount or incentive comes off. Then specialists get brought in for the pieces that need doing, and they're judged on results rather than activity.

Two examples from my own work. At oneBanking, a fintech, I built the live event marketing strategy, ran their social strategy and channels, and led graphic and asset design. On Owners Club, a Web3 game, I ran the launch and growth: 108,111 registered players, with 21,720 active in the first 90 days, alongside a CEX and DEX launch that did $9.5M in day-one volume, and a big part of that job was briefing and judging the agencies and KOLs, not replacing them.

The trade-off is real. A fractional CMO has limited hours, and you have to be comfortable that your marketing lead isn't in every meeting.

How do the three options compare?

  Fractional CMO Marketing agency Full-time CMO
Typical UK cost £3,000 to £16,000 a month £1,250 to £3,500 a month for one channel, £3,500 to £16,750 full-service, plus ad spend About £220,000 on a £150,000 base, £300,000+ at the senior end
What you're buying Judgement, ownership of the plan and hands-on delivery Execution capacity in one or more channels A permanent leader and team builder
Who decides what to do The CMO, with you Usually you, or the agency by default The CMO
Time to start Weeks Days to weeks Three to six months to hire and ramp
Best at Positioning, channel choice, measurement, launch planning Volume: paid media, PR, content, SEO, community Running a function long term
Weak spot Limited hours Can stop at channel metrics unless customer quality and retention are in the brief Expensive if you hire too early
How you get out Usually 30 days Contract term, often 3 to 6 months Notice, often a settlement

Agency retainers from Whito's UK agency retainer benchmark (2026, excluding VAT and ad spend). Fractional and full-time costs from our UK cost breakdown.

When should a startup use a marketing agency?

When you already know what you need done and want more hands doing it. A paid campaign around a launch, a PR push, SEO and content once you know which topics bring buyers in. Agencies are good at volume and they've got the specialists.

It goes wrong when the agency becomes the strategy. They'll report what they control: impressions, clicks, placements, follower growth. Fair enough, that's what they can measure. Whether those people became customers and stayed usually isn't anyone's job.

When should you hire a full-time CMO?

When the role needs roughly four days a week or more, you're building a team rather than a plan, and you can fund the role for two years. Before that point, you're paying a full-time salary for a part-time leadership job.

Should you hire a head of growth instead?

Sometimes. If you already know your channel and need someone on it five days a week, a head of growth is often the right first hire. UK head of growth salaries mostly sit between £80,000 and £120,000, averaging around £100,000 (Intelligent People via Fractional Quest). The difference from a hands-on fractional CMO isn't whether they do the work. It's time and scope. A head of growth gives you every day on a channel you've already chosen. A fractional CMO gives you fewer days across the whole picture, deciding which channels deserve the effort and delivering against it. The risk with a head of growth on their own is a strong operator running a plan nobody senior has pressure-tested.

Can you combine them?

Yes, but the shape has changed. A good CMO doesn't just set the strategy and hand it off. They get into the detail: write the brief, run the first campaigns, set up the tracking, and build a foundation the company can scale on. With AI in the toolkit, one experienced operator can now execute at a level that wasn't possible for one person a few years ago. So for most funded companies, the setup I'd recommend is a fractional CMO who both decides and delivers, with an agency or specialist brought in only where you need volume or a skill they don't have, and held to the same numbers. When the company outgrows that, the fractional CMO helps hire the full-time one.

Does any of this change for crypto and Web3?

The logic's the same, the costs and risks are sharper. Crypto agencies charge more, from about $3,000 to $20,000+ a month in retainers according to CoinLaunch, and KOL and media spend comes on top. A token launch adds a hard date you can't move, and a community that judges you in public within hours. That makes the planning more valuable, not less.

What should you ask before you hire any of them?

The same eight questions work for a fractional CMO, an agency or a full-time candidate. What you're listening for is specifics: numbers, names, things they stopped.

  1. Which single number will you own, and where will it be by day 90?
  2. Walk me through a plan you killed, and why.
  3. What would you need from me in the first two weeks?
  4. Who exactly will do the work, and how many hours a week is that?
  5. How will we know which channel each customer came from?
  6. What would make you tell me to spend less, not more?
  7. Show me a result you're proud of, and what it cost per customer.
  8. What's the last thing you were wrong about?

Five red flags, whichever route you're considering:

  • They talk about reach, impressions and followers, never customers or cost per customer
  • They want a long minimum term before they've shown anything
  • You won't own the ad accounts, the data or the content
  • They're spread across six or more clients and can't say how many hours you get
  • Every answer to what went wrong is somebody else's fault

So which should you choose?

Ask yourself one question. Do you need another executive on payroll right now, or do you need someone who can tell you what's working and fix what isn't, starting this month? If it's the second, start fractional. You can always hire full-time later, and you'll know far better what that person needs to do.