How to justify your agency budget to your CEO
Every budget review, someone looks at the agency fee and asks why it's still there. It's a fair question, but it's usually being asked with only half the picture. Here's the other half.
Key takeaways
● Cutting the agency fee doesn't remove the cost of the work, it just moves it somewhere less visible.
● An in-house hire costs far more than the salary on the offer letter, once you add recruiting, benefits, overhead, and months of ramp-up time.
● Agencies bring a breadth of expertise and flexibility that a single hire can't easily replace.
● The strongest case to a CEO isn't "keep the agency", it's "here's the full cost of the alternative".
Why your agency fee is always the first thing your CEO wants to cut
Budget review season, and there it is on the P&L: a line item paid out every month to an outside agency. It stands out, and it's usually the first thing anyone reaches for when they're hunting for savings.
"Why are we paying someone else to do this? Surely our own team could just take it on?"
It's a fair question to ask. It's just not the whole question.
Agency vs in-house: you're comparing the wrong two numbers
The instinct is to compare the agency fee against zero. Cut the fee, save the money, simple.
But that's not the real choice. The real choice is the agency fee against the true cost of doing the same work in-house, and that number is almost always bigger, slower to pay off, and riskier than it looks on a spreadsheet.
Here's what actually goes into building that capability internally instead.
What an in-house marketing hire actually costs in year one
A salary is the number everyone sees. It's rarely the number that matters.
Recruiting costs haven't been standing still. SHRM's (Society for Human Resource Management) own data shows executive hiring costs alone are up 113 percent since 2017, a sign of just how much more expensive hiring has become across the board. Add benefits, payroll taxes, and overhead on top of salary, and most sources put the loaded cost of an employee at 20 to 30 percent above base pay, sometimes more.
Then there's ramp-up. New hires typically operate at around 25 percent productivity in their first month, climbing to 50 percent in month two and 75 percent in month three. Most sources put full productivity at three to eight months out, depending on the role. That's not a slow employee, that's just how long it takes anyone to learn a business, a market, and a set of tools from scratch.
And if the hire doesn't work out, you're not just back where you started. You've absorbed the wasted onboarding, the redone work, and the search you now have to run all over again, on top of everything spent getting them up to speed in the first place.
None of this is a knock on any individual hire. It's just the maths of building a function from scratch, and it's maths that rarely makes it into a budget review.
Agency vs in-house: the year one comparison
Lined up side by side, the picture looks different to a single line item on a P&L.
We’re not arguing here that in-house is always wrong, we’re just saying that it isn't automatically cheaper, and the version of the comparison most budget reviews use leaves out most of this picture.
What doesn't show up on the spreadsheet at all
Even a fair cost comparison misses a few things that only show up once the work is actually underway.
An agency isn't one person's knowledge. It's a team, which means a specialist in paid media, another in content, another in strategy, all available without you having to hire, manage, or cross-train any of them individually.
That team is also staying current on your behalf. Platforms change, algorithms shift, and what worked six months ago often doesn't now. Keeping up with that is a full-time job in itself, and it's one an agency is already doing across every client it works with, not just yours.
And if a single in-house hire leaves, the function leaves with them, along with the context, the relationships, and the momentum they built up. An agency doesn't have that single point of failure. The relationship continues even if the specific people working on your account change.
When in-house genuinely makes sense
None of this means in-house is always the wrong call. It usually makes sense once a function is core enough, and constant enough, to justify the fixed cost, and once there's someone senior enough already in the business to manage that person and catch problems early.
A hire also starts to make more sense than an agency once the working relationship has matured to the point where an in-house person could match an agency's output, and the business has the volume of work to keep them fully occupied. Below that point, you're usually paying full-time overhead for part-time need, which is exactly the gap an agency is built to fill.
The honest version of this article isn't "never hire in-house." It's "know which one you're actually choosing, and why."
How to actually present this to your CEO
You don't need a long deck. You need three numbers your boss hasn't already seen.
1. The true cost of the in-house alternative. Not just the salary you'd advertise, add roughly 25 percent for benefits and overhead, plus a realistic recruiting cost, so they're comparing like with like
2. The time to break even. Factor in the productivity ramp (three to eight months before someone's fully up to speed) against how fast the agency is already delivering. That gap is real cost, even though it never appears as a line item.
3. What you'd lose in the meantime. Name the specific gaps: the specialist skills you'd need to cover, the platform changes you'd need to track, the work that would simply wait while someone learns the job.
Bring those three numbers, not a defense of the agency relationship, and let your boss do the maths themselves. Most budget conversations aren't actually about whether the spend is justified... they're about whether anyone's shown the full picture yet!
A good partner makes this case easy, not necessary
We'd rather you keep working with us because the numbers hold up than because you talked your boss out of looking closely. So if you're heading into a budget review and want the real cost comparison run properly, with your actual numbers instead of industry averages, that's a conversation we're always happy to have, so you can be sure whatever you decide, you're deciding with the full picture in front of you.
Frequently asked questions
Is it cheaper to hire in-house or use a marketing agency? It depends on the size and consistency of the workload, but the comparison is rarely as simple as it looks. An in-house hire carries recruiting cost, benefits and overhead, and months of ramp-up before they're fully productive. An agency's fee already has most of that built in.
How do I justify agency costs to my CEO or boss? Bring the true cost of the in-house alternative, the time it would take to reach full productivity, and what capability you'd temporarily lose while that happens. Let the numbers make the case rather than defending the relationship itself.
What's the real cost of an in-house marketing hire in year one? Beyond salary, factor in recruiting costs, benefits and payroll overhead, and a productivity ramp that typically runs three to eight months. Most of that cost never appears as a single line item, which is exactly why it gets missed in a budget review.
When does it make sense to bring marketing in-house instead of using an agency? Generally once the workload is large and steady enough to keep someone fully occupied, and there's already someone senior enough in the business to manage and support them.
Related reading: https://machmediagroup.com/blogs/b2b-marketing-roi-what-it-actually-means-why-it-is-so-hard-to-measure-and-how-smart-companies-do-it-anyway
At Mach Media we help B2B brands get clear on who they're talking to and build communications that actually reach them. If your messaging feels like it's talking to everyone and resonating with nobody, that's usually where we start. Get in touch to find out more.
