When a business decides it needs more from marketing, there are three common routes: hire a full-time CMO, appoint an agency, or bring in a fractional CMO. Each is the right answer in some situations and the wrong answer in others.
As a fractional CMO I clearly have a perspective, so I’ll try to be fair. I’m Glyn Hurll, and I regularly work alongside agencies and help businesses hire full-time marketing leaders. Here’s how the three options compare.
The core difference: leadership vs capacity
The most useful distinction is between leadership and capacity.
- A full-time CMO gives you leadership, full-time.
- A fractional CMO gives you leadership, part-time.
- An agency gives you capacity and specialist skills, directed by someone on your side.
Many marketing problems that look like a capacity problem are actually a leadership problem. If the strategy is unclear, adding more output just produces more unfocused activity.
Fractional CMO
Best for: businesses that need senior strategic leadership and accountability but don’t yet need, or can’t yet justify, a full-time executive.
Strengths
- Board-level experience at a fraction of the cost of a full-time hire.
- Fast to start; no lengthy recruitment process.
- Brings perspective from multiple businesses and sectors.
- Sits inside the leadership team and is accountable for results, not just deliverables.
- Can build the team and the case for a permanent hire.
Limitations
- Limited days, so they need a team or partners to execute.
- Less day-to-day presence than a full-time leader.
Marketing agency
Best for: businesses that know what they need to do and need specialist skills or extra hands to do it.
Strengths
- Deep expertise in specific channels: paid media, SEO, content, design, PR.
- Scalable capacity that’s easy to flex.
- Access to tools and specialists you wouldn’t hire in-house.
Limitations
- Agencies work to a brief. If the brief is wrong, they’ll execute the wrong thing well.
- Their accountability is to the scope, not to your revenue.
- Account teams often include layers between you and the senior people you met in the pitch.
Full-time CMO
Best for: businesses where marketing is a primary growth engine and the scale justifies a full-time executive.
Strengths
- Total focus on your business.
- Deep cultural integration and continuity.
- Full capacity for leadership, team management and stakeholder work.
Limitations
- Significant cost once salary, bonus, equity and benefits are included.
- Recruitment takes months, and a mis-hire at this level is expensive.
- The business may not yet have enough senior marketing work to fill five days.
Side-by-side
| Fractional CMO | Agency | Full-time CMO | |
|---|---|---|---|
| Provides | Leadership | Capacity and specialism | Leadership |
| Time commitment | 1–3 days a week | Defined by scope | Full-time |
| Accountable for | Marketing’s commercial contribution | Agreed deliverables | Marketing’s commercial contribution |
| Speed to start | Weeks | Weeks | Months |
| Relative cost | Moderate | Varies with scope | Highest |
| Seat on leadership team | Yes | No | Yes |
They work best together
This isn’t really an either/or decision. Some of the most effective set-ups I’ve seen combine a fractional CMO setting strategy and leading the function, a small in-house team running core activity, and one or two specialist agencies for channels that need deep expertise. The fractional CMO writes better briefs, holds agencies to commercial outcomes and makes sure budget goes where it earns its keep.
Over time, as the business grows, that structure often evolves into a full-time marketing leader. A good fractional CMO will help you plan for that and recruit the right person.
Frequently asked questions
Not necessarily; they’re paying for different things. A fractional CMO is paying for leadership, an agency for delivery. Many businesses get the best return by using a fractional CMO to make their agency spend work harder.
Sometimes they’ll recommend consolidating or changing agencies, but a fractional CMO isn’t an execution resource. They direct the people who do the work.
When marketing’s workload and strategic importance genuinely need five days of senior attention, and the business can support the cost. That’s usually a conversation that happens naturally during an engagement.
Next step
If you’re weighing up these options, book an introductory call. I’ll give you a straight answer on which route makes most sense for where your business is now.