Three options exist when a business decides its marketing needs senior ownership: hire a full-time CMO, hand the whole function to an agency, or bring in a fractional CMO. Most businesses default to whichever option they’ve heard of first, not whichever actually fits their situation.
TL;DR: A marketing agency executes specific channels. A fractional CMO sets strategy and holds channels accountable to it. An in-house full-time hire makes sense once marketing is complex and large enough to justify a $200,000+ salary. Most growing Sydney businesses are better served by a fractional CMO paired with agencies for execution than by either extreme alone.
What each option is actually built to do
A marketing agency is built around channel execution: running the ads, writing the content, managing the social calendar. Agencies are good at doing the work. They’re structurally not positioned to tell you whether the work is the right work, because that would mean recommending against their own services.
An in-house full-time CMO is built for businesses where marketing is already core to how revenue gets made, complex enough to need daily leadership, and large enough in spend to justify the salary. Below that threshold, a full-time hire is expensive strategic capacity sitting idle much of the time.
A fractional CMO fills the gap between those two: strategic ownership without the full-time cost, and independence from any single execution channel’s incentive to keep doing more of what it already does.
The failure mode of each option
Agency-only setups tend to fail through channel bias: whichever agency you hired for SEO will always find more SEO work worth doing, and whichever one you hired for paid ads will always find more budget worth allocating there. Nobody’s evaluating whether the mix across channels is actually right, because each agency only sees its own slice.
In-house-only setups fail when the hire is either too senior for the business’s current stage (expensive strategic thinking with nothing tactical to execute) or too junior for what’s actually needed (someone capable of running campaigns but not of setting a strategy that ties spend to revenue).
Fractional CMO setups fail when the business treats the engagement as another execution channel rather than the strategic layer above the other channels, which defeats the actual point of bringing one in.
A practical way to decide
If you’re already running one or more marketing agencies and nobody is checking whether they’re pulling in the same direction, a fractional CMO is the missing layer, not another agency. If you have no marketing function at all yet and a genuinely limited budget, start with a fractional CMO to build the strategy before hiring anyone to execute it. If marketing spend has grown to the point where a full-time hire pencils out financially, that’s usually the point to move from fractional to permanent, not before.
Running a fractional CMO and agencies together
This is the most common setup for growing Sydney businesses, and it works because the roles don’t overlap. The fractional CMO sets the strategy, allocates the budget across channels, and holds each agency accountable to a shared plan rather than its own isolated targets. The agencies execute within that plan. Nobody is grading their own work.
Frequently Asked Questions
Can a fractional CMO manage our existing agencies directly?
Yes, this is a standard part of the engagement: reviewing agency performance, reallocating budget between them, and holding each one accountable to the overall strategy rather than letting each report only on its own channel.
At what revenue size does an in-house CMO make more sense than fractional?
There’s no fixed number, but as a rough signal: once monthly marketing spend across all channels regularly exceeds $30,000–$50,000 and the complexity is genuinely daily, a full-time hire usually starts to pencil out better than a fractional arrangement.
Is it normal to switch from a full agency retainer to a fractional CMO model?
Yes. It’s a common move for businesses that started with an all-in-one agency retainer and found the agency was executing well but nobody was checking whether the strategy itself was right.
Do agencies push back against working under a fractional CMO?
Good agencies generally welcome it, since clear strategic direction and accountability makes their own execution easier to plan and defend. Pushback is usually a signal about that specific agency relationship, not the model.
If you’re weighing these options for your own business, the honest starting point is an audit of what’s currently being spent and where. See Avatar Studios’ fractional CMO pricing and process, or start that audit conversation.