After 14 years working across both agency and client-side performance marketing — leading teams at iProspect and Carat (Dentsu) in Brussels and Oslo, and working in-house at several advertisers across different markets — I’ve seen enough to have a clear perspective on how these two worlds actually differ.
This article covers the real differences between agency and in-house performance marketing careers: what each environment gives you, what it costs you, how compensation compares, and what AI is about to change about the entire debate. It’s aimed at everyone from performance marketers just starting out to senior managers weighing a move.
Table of Contents
Agency Performance Marketing: What It Actually Gives You
Let me be clear upfront: this is not the definitive truth. Every agency is different. Every in-house team is different. What I’m sharing is a perspective built on experience — one I hope is useful whether you’re just starting out, considering a move, or trying to build a team.
The research on this topic tends to frame agency work in terms of scale, specialisation, and cost efficiency. All of that is true. But from the inside, what I remember most is the pace of learning.
When you work at a performance marketing agency — especially a global one — you are exposed to more in your first two years than most client-side professionals encounter in five. You’re managing multiple accounts across different industries, different business models, different buying cycles. One day you’re deep in a B2B lead generation funnel, the next you’re optimising a high-volume e-commerce shopping campaign while answering customer phone calls and emails. This constant context-switching can be demanding, but it’s also an education you cannot replicate anywhere else.
You are also surrounded by specialists. SEO, programmatic, paid social, analytics — they’re all in the same building or floor, sometimes at the same desk. If you’re curious and proactive, you can absorb knowledge that would otherwise take years of isolated effort. Platform partners — Google, Meta, TikTok and others — visit regularly, run workshops, share beta features. That direct line to the ecosystem matters enormously when the industry changes as fast as performance marketing does.
The social dimension is real too. Agency teams tend to skew younger and they tend to work closely together under shared pressure. That creates a specific kind of camaraderie that I have not found to the same degree on the client side. Some of my strongest professional friendships came from those years.
All of this is consistent with what industry research suggests globally: agency professionals build broad, rapidly-acquired technical foundations, with exposure to algorithmic environments and platform mechanics that in-house teams simply cannot match at the same speed. 1
Agency Performance Marketing: What It Actually Costs You
This is where I want to be honest in a way that job postings and recruiter conversations rarely are.
The financial reality is one thing. Agencies are broadly known to pay considerably less than client-side roles at comparable seniority levels — this is a well-documented pattern across markets. 2 Entry salaries are typically low, and the gap widens as you progress. The agency justifies this with “exposure” and “career acceleration” — and to be fair, those are real. But there is a genuine mismatch between what is asked of people and what they are paid for it. In Norway, an entry level role would typically be looking between NOK 430.000 to NOK 500.000 annually before taxes.
The more personal cost is harder to quantify. The pressure at agency is structural — it’s not a bad manager or a bad quarter, it’s the fundamental business model. You are a service business. Clients expect results, account managers promise results, and the execution teams deliver results, often with resources that haven’t scaled proportionally to the scope that was sold.
I’ve seen this dynamic play out repeatedly: a client relationship grows, more services get added, more hours get committed through retainers or hourly agreements — but the team working the account stays the same size. The operational teams absorb the overload quietly, until someone breaks. I’ve seen talented people end up in burnout or mental breakdown because of this. It happens more than the industry publicly acknowledges. Industry-wide, the numbers are striking: globally, around 70% of professionals in the media and marketing sector reported experiencing burnout in 2024 — significantly higher than the broader workforce average. 3
Norway is somewhat of an exception here. The cultural and legal emphasis on employee wellbeing, working hours, and mental health provides a structural buffer that many other markets simply don’t have. But even here, performance marketing operates in its own high-pressure reality that no welfare policy can fully absorb.
In-House Performance Marketing: What Changes and What Doesn’t
Moving client-side after years in agency feels, at first, like someone turned down the volume. The pace is slower. You work on one company, one brand, one set of KPIs. You have time to actually think.
That is genuinely valuable. The depth of focus available in an in-house role is something agency life rarely allows. You get to understand the business — not just the media metrics, but how marketing connects to product, supply chain, sales, and customer experience. You gain a perspective that makes you a better marketer in the long run. 4
On compensation, the client-side advantage is real and well-documented — both globally and in Norway specifically. The Norwegian market data shows that specialised performance marketing roles command strong salaries, and in-house positions tend to offer more stable and competitive total packages than their agency equivalents, particularly at mid-to-senior levels. 5 The combination of higher base pay, clearer working hours, and the absence of client servicing pressure makes the move attractive for many agency professionals — and unsurprisingly, a large share of mid-to-senior agency talent eventually makes exactly that transition. 6
But in-house has its own challenges, and they are different rather than smaller.
The support structure you relied on disappears. In agency, platform partners come to you — Google reps, beta access, industry briefings. On the client side, your level of access depends heavily on how much you’re spending with them. Reduce your budget, reduce your contact. The onus of staying current falls entirely on you. In my experience, whether an in-house team remains sharp on industry changes depends almost entirely on the individuals in it — there is no institutional mechanism that guarantees it.
The bureaucracy is also real. Budget approvals, tool requests, creative changes — all of it moves through layers of stakeholders who may not share your technical frame of reference. You spend time justifying things that in agency were simply decisions. 7
And there is a quieter risk: intellectual stagnation. Without the constant influx of new challenges, new clients, new problems, it is easy to default to what has always worked. In-house teams that lack external exposure can become vulnerable to relying on legacy tactics and missing emerging industry shifts. 8
Why an Agency Background Makes You a Better In-House Marketer
When I transitioned to client-side roles, the agency background was an immediate advantage. I knew what needed to be done from day one. I understood how to read a business, identify the metrics that actually mattered, and speak the language of both performance marketing, dev-tech and management. I could onboard fast and contribute fast.
More than that, I carried an instinct for staying current that agency had built into me. Following industry changes, reading platform updates, maintaining peer networks — that became a personal habit rather than something I needed to be told to do. In a world where AI is now accelerating the pace of change in performance marketing, that habit matters more than ever.
The agency experience also taught me what good operational rigour looks like. When you’ve managed campaigns across a dozen clients simultaneously, the systems you develop — for monitoring, reporting, flagging anomalies — translate directly into better in-house execution.
Agency vs. In-House: Which Career Path Is Right for Performance Marketers?
There is a well-established view in the industry that the best trajectory is agency first, then client-side leadership. Industry data suggests that many enterprise organisations deliberately recruit executive marketing talent from the agency side — specifically because of the breadth of strategic experience that agency careers build. 9
I agree with it, based on what I’ve seen across my own career and the careers of colleagues.
Start at the bottom of the ladder in an agency — ideally a global one, where you will be working alongside international colleagues and exposed to a wider professional network. Take the junior role. Do the unglamorous work. The learning compounds faster than you expect. Before long, you’re managing real budgets, teaching junior colleagues, and being trusted with key accounts.
When you have built that foundation — typically after several years — you move in-house with something that cannot be shortcut: genuine platform mastery and a breadth of commercial experience. You hit the ground running in a way that purely client-side careers rarely allow.
I’ve watched this cycle repeat across multiple ex-colleagues. The ones who started in agency and moved to advertiser side at the right moment have consistently been the most capable and adaptable operators.
What AI Means for the Agency vs. In-House Debate in 2025 and Beyond
This is the part of the conversation that I find genuinely uncertain — and I think anyone who tells you otherwise is overconfident.
Both models will be disrupted. AI is already handling significant portions of what performance marketers spent years mastering: bid management, asset generation, audience segmentation, reporting. The question is not whether teams will shrink, but how fast and how severely.
Global industry forecasts suggest that as agencies integrate generative AI to reduce the cost and time of content production and media execution, they will be able to offer capabilities at a scale and price point that in-house teams cannot independently match — but this also means agencies will need to compete on proprietary AI workflows and strategic oversight rather than manual execution. 10
My expectation is that the impact will be more acute on the agency side. Agency headcount has historically been more or less justified by the volume of manual execution work. As AI absorbs more of that work, the model of billing for hands-on hours becomes harder to sustain. The agencies that survive and thrive will be those that pivot to strategic oversight and capabilities that genuinely require human judgement.
The client-side impact will be real too, but less abrupt. Smaller teams, broader remits and responsibilities, higher expectations. What concerns me is the risk that agency professionals end up managing even larger portfolios with fewer team members, as AI handles execution but the strategic and relationship work — which cannot be fully automated yet — remains. Whether that leads to better working conditions or simply different workload remains to be seen.
What is clear is that the professionals who will navigate this well are those who have already built a strong foundation of real experience. AI is a powerful accelerant. It amplifies what you already know. That is an argument, if anything, for getting the broad-based agency experience early — before AI makes the distinction between junior and senior performance marketers even sharper.
Closing Thought
There is no universally correct answer to whether agency or in-house is right for you. The answer depends on where you are in your career, what you want to learn, what you’re willing to accept, and what kind of work gives you energy.
What I can say, having worked both sides across multiple markets over 14 years, is that the patterns are consistent enough to be worth knowing. Agency accelerates you. Client-side deepens you. The combination of both, in the right sequence, produces some of the most capable performance marketers I have ever worked alongside.
If you’re at the start of your career, get into an agency. Roll up your sleeves. Let the pace teach you. And when the time is right, bring everything you’ve learned to a brand that deserves it.
References
Footnotes
- Herd Digital — Agency vs In-House Marketing Roles: Which Is Right for You? https://herd.digital/blog/agency-vs-in-house-marketing-roles/
- DMCG Global — Pros & Cons Of Agency Vs In-house Marketing https://www.dmcgglobal.com/blog/2022/05/is-the-grass-always-greener-things-to-consider-before-moving-from-agency-to-in-house
- B&T — 2024 Mentally Healthy Survey: 70% Of The Media, Marketing & Creative Industry Have Experienced Burnout In The Past Year https://www.bandt.com.au/2024-mentally-healthy-survey-70-of-the-media-marketing-creative-industry-have-experienced-burnout-in-the-past-year/
- Ironhack — Working in Marketing: Agency vs In-House https://www.ironhack.com/us/blog/working-in-marketing-agency-vs-in-house
- Teft — Bransjerapporten: Dette er vinnerne på arbeidsmarkedet nå https://teft.no/tips-til-deg-som-soker-ny-jobb/dette-er-vinnerne-pa-arbeidsmarkedet-i-na/
- DMCG Global — Pros & Cons Of Agency Vs In-house Marketing https://www.dmcgglobal.com/blog/2022/05/is-the-grass-always-greener-things-to-consider-before-moving-from-agency-to-in-house
- Indeed — In-House vs. Ad Agency Marketing: Pros and Cons https://www.indeed.com/career-advice/career-development/in-house-vs-ad-agency
- Indeed — In-House vs. Ad Agency Marketing: Pros and Cons https://www.indeed.com/career-advice/career-development/in-house-vs-ad-agency
- Reddit — Agency vs In-House for Career Growth? https://www.reddit.com/r/marketing/comments/17jjgoi/agency_vs_in_house_for_career_growth/
- Forrester — Predictions 2025: Agencies Jettison Legacy Structures To Form New Agency Types https://www.forrester.com/blogs/predictions-2025-marketing-agencies/
