For brands, the debate over whether you should go with an agency vs in-house marketing team often starts with a simple question: Which option costs less?
In reality, that’s the wrong question. The better question is: “Which option can deliver the fastest, most useful and actionable marketing support for every dollar we put into it?” Now you’re talking about real ROI.
Don’t get us wrong. A strong in-house team can be a tremendous asset for any brand. We know, because mhp.si works with a lot of them. In-house teams know the stakeholders, the business, and the products. They hear customer feedback firsthand and can often understand internal concerns and challenges without a briefing call.
But building an in-house team is usually a lot more expensive than most people think. It also usually takes more management supervision, more technology support and more time in both hiring and training than companies first expect.
Hiring an outside agency comes with its own set of costs, of course. But, in general, those costs are usually lower than going in-house.
When you hire an agency like mhp.si, you’re getting instant access to a group of skilled, carefully-vetted specialists; a pre-gelled team that’s ready to hit the ground running. You’re only paying them for the time they work, not sick days, snow days or vacation.
The alternative is spending months recruiting, interviewing and hiring key personnel and then training them to showcase their strengths. That can change the ROI calculation dramatically.
In-House Marketing vs. Agency ROI: The Real Cost
Imagine a company wants an internal marketing team with the capacity to cover marketing strategy, campaign execution, content and design. A fairly lean team to accomplish that might include a marketing manager, a marketing specialist and a graphic designer.
According to the U.S. Bureau of Labor Statistics’ 2025 national wage data, the mean annual salary for a marketing manager is $177,770 per year. Marketing specialists averaged $89,490, while graphic designers averaged $70,560.
Add up those three positions, and your annual bill for talent alone is north of $330,000 per year, before benefits.
That doesn’t include what it costs to recruit, hire, equip and retain that three-person team. Today, wages and salaries represent only about 70% of total employee compensation.
Include benefits, paid leave and retirement contributions, and you’re getting close to a half-million dollars a year for a three-person team. That still doesn’t include laptops, software subscriptions, office space, ongoing training, support staff and other resources.
Even when you get everybody on board and equipped, you’ve still got a rather basic team that may not have the capability to handle everything. Depending on what you’re trying to accomplish, you might still need additional expertise in paid-media, SEO, copywriting, web dev, analytics, social media, marketing automation, PR or specialized creative like animation or short-form video.
Once you start looking into real costs, the ROI gap between hiring a marketing agency vs. an in-house team comes into sharp focus.
When you hire an agency partner like mhp.si, you’re getting a cohesive unit with the talent, skills and infrastructure to get started immediately and solve major problems quickly. Trying to get a newly hired internal team to that point could take months.
Agency vs. In-House Marketing: A Simple ROI Breakdown
Let’s say the three-person, in-house team we’ve described costs approximately $481,000 in annual salary and benefits, plus all the other costs we’ve mentioned.
Now suppose the alternative solution is an agency engagement of $15,000 a month*, or $180,000 a year.
*Note: $15,000 is not meant as an industry benchmark or estimate; agency pricing varies according to scope, market and services.
Let’s say both approaches were wildly successful, generating $700,000 in additional gross profit in a year from marketing efforts alone. In that case, the ROI would look like this:
In-House Team
Investment: $481,000 per year
Return: $700,000
ROI: ($700,000 – $481,000) / $481,000 = about 46% ROI
Agency Partner
Investment: $180,000 per year
Return: $700,000
ROI: ($700,000 – $180,000) / $180,000 = about 289% ROI
Real marketing is messier than a three-line calculation. An outstanding in-house team might outperform a mediocre or less-experienced agency by a wide margin. But if the point is ROI, a highly skilled agency team with a great track record is usually going to deliver more ROI, and faster ROI, than an in-house team. It’s just dollars and cents.
That’s especially important when execs are being asked to squeeze more out of marketing budgets. Gartner reports that marketing budgets fell to just 7.7% of company revenue in 2024, at a time when 73% of marketers said they were being asked to do more with less and 63% said they don’t have the budget their current strategies will require.
What About Results?
Cost and speed don’t mean a lot if the marketing doesn’t work. This is arguably where the decision on hiring an agency vs. in-house marketing becomes most important.
An internal team’s greatest strength is familiarity with your brand. But that can also be their greatest weakness. People who spend every day inside a company naturally inherit its assumptions and biases. They know the product, why it works the way it does, why particular terminology is used and why certain decisions were made. The problem is: your customers don’t.
One of the most important things an agency brings to the table is an outside perspective. Agency teams have no preconceived notions and aren’t privy to internal doubts, pessimism and naysaying.
They also run campaigns across a variety of businesses, audiences and channels. If they’re good, that means experience. Their ideas have been tested in more environments and before more customers. Successful tactics from one category can often be adapted to another. Failed approaches get spotted earlier or not attempted at all. Moreover, an outside agency can usually prove what’s working through additional data, because they know where to look for the metrics that actually matter.
Today, that focus is invaluable. Deloitte’s 2025 CMO research found that 64% of CMOs said their top challenge was proving their marketing’s value to the business. The same report tagged identifying KPIs that confidently demonstrate marketing impact as an opportunity for marketing leaders.
Long story short, marketing activity is easy to produce. Meetings, posts, campaigns, impressions and reports can keep a department extremely busy. Actual results are much harder.
ROI improves when the people doing the work are accountable not just for producing marketing activity, but for connecting it to real leads, sales, customer value and growth. That’s what you get when you hire a reputable agency.
When to Hire a Marketing Agency
So, when should you hire a marketing agency rather than trying to ramp up an in-house marketing team? One useful test is to ask whether your marketing problem requires capacity or capability.
If you already have the right strategy, systems and team, but have more work than your existing team can handle, hiring another employee may be just what you need. You’re supplementing what you’re already successful at, and adding to a team that’s already doing the work.
However, if you need more capability, the calculation changes. Maybe your company needs a new positioning strategy, better creative, paid campaigns, landing pages or measurement. Hiring five specialists to solve a six-month growth problem is a wildly inefficient use of capital.
A Simple Checklist
Think about hiring an agency instead of an in-house team when:
☐ You need access to multiple marketing disciplines without making several full-time hires.
☐ You’re on a tight schedule, when multiple recruitment cycles could cost you business opportunities.
☐ Your internal team needs specialist support.
☐ The connection between marketing activity and ROI is unclear.
☐ You want a fresh, outside perspective on positioning, creative, customer acquisition, etc.
Consider a Hybrid Marketing Partnership
Remember: you don’t have to go all-in one way or the other. Some of the strongest organizations — including several mhp.si works with — use a hybrid setup for marketing.
In a hybrid marketing relationship, an internal marketing leader with your company watches over the brand, managing a team of insiders with deep customer knowledge and company priorities, while an outside agency team provides the specialists, production talent, capacity and fresh perspectives.
Given that, the smartest question may not be whether to outsource marketing or build an in-house team. It may be to ask yourself: which capabilities do we already own vs. which capabilities can be provided as needed by a skilled agency partner?
mhp.si can support your goals
For many companies, the biggest advantage of hiring an agency is leverage. Instead of spending your budget creating and supporting an entire marketing department, you’re buying access to an existing one with a proven record of success. That lets you put more time, energy and money toward the work itself.
In the end, that’s what marketing ROI is all about: finding the solution that turns each marketing dollar into the greatest-possible result.
If you’re weighing an internal marketing team versus outside support, contact mhp.si. We’ve been backing brands with award-winning marketing and in-house team support for over 50 years. Whatever you want to accomplish, our specialists can help you meet your goals and tap into real, measurable ROI.