If you run paid search seriously, sooner or later you land on the same crossroads: build the capability inside your walls, or hand it to specialists outside them. The Google Ads agency vs in-house debate usually gets framed as a gut call about control and culture, when it is really a math problem. Most founders and CMOs compare a monthly agency invoice against a single salary line, decide the salary looks cheaper, and hire. Six months later the numbers are different. Below is the honest breakdown, without the sales spin, so you can decide what actually serves your P&L.

The two ways to run paid search

There are really only two operating models, plus a third that borrows from both. You either put a paid search manager on your payroll, or you retain a Google Ads agency to run the accounts for a fee. The hybrid keeps one strategist in-house and outsources execution. Each model buys a different mix of control, speed, and accountability, and each carries a total cost that runs well beyond the obvious number. The Google Ads agency vs in-house call matters because paid search is often the single biggest lever on your acquisition cost, and small differences in execution compound fast.

What an in-house PPC team really costs

An in-house PPC team feels like the transparent option. You know the salary, you sign the contract, done. But it’s not exactly as easy.

Salary is only the starting line

Across European markets, a competent paid search specialist commands a real wage. In Germany the average sits around 51,500 euros a year, in Spain closer to 41,000 in Madrid, and in the UK a paid search manager typically ranges from 40,000 to 65,000 pounds depending on seniority. Those numbers are not what the hire costs you.

Standard HR practice loads a full-time employee at 1.25 to 1.4 times base salary once you fold in payroll taxes, benefits, pension contributions, paid time off, equipment, and desk space. Eurostat puts non wage costs at roughly a quarter to a third of total labour costs across the EU, and as high as 32 percent in France. So a 55,000 euro specialist is closer to 70,000 to 77,000 euros a year in real, fully loaded cost, before you have paid a single euro to Google.

The costs that never show up on the payslip

One person cannot be an expert in Search, Shopping, Performance Max, feed optimisation, tracking, and creative all at once, so you either accept blind spots or buy tools and training to cover them. Bid platforms, analytics, and reporting stacks add up. And when your specialist leaves, and good ones get poached, you inherit a knowledge gap, a hiring cycle, and campaigns drifting on autopilot. A bad hire alone can cost up to 30 percent of that person’s first-year salary. Single-person coverage also means no continuity during holidays or sick leave. None of this is a reason to avoid an in-house PPC team, it is simply the part of the invoice we forget to print.

What a Google Ads agency really costs

The cost of a Google Ads agency looks scarier on paper because it arrives as one visible monthly figure. That visibility is actually an advantage, as long as you read the fine print.

Retainers, percentages, and the fine print

Google Ads management fees generally follow one of three shapes. Many agencies charge a percentage of your monthly ad spend, commonly 10 to 20 percent, with the industry standard landing around 15 to 20 percent. Others quote a flat monthly retainer, typically between 1,500 and 10,000 euros or more depending on account complexity, and some blend the two. Whatever the fee, remember it sits on top of what you already pay the platform for clicks, and Google’s own cost controls mean your media budget stays in your hands, not the agency’s.

The percentage model has a built-in tension worth naming: when the fee is tied to spend, the agency earns more every time your budget grows, whether or not that growth is smart. The right question is never simply how much, but what does that fee actually buy in strategy, testing, and senior attention.

The real cost comparison, side by side

Here is where the Google Ads agency vs in-house decision stops being philosophical. Put a mid-level in-house specialist, fully loaded, at roughly 6,000 to 8,000 euros a month once you account for everything above. A capable agency retainer covering the same ground often lands in a similar band, sometimes lower, while spreading a whole team of specialists across your account rather than one generalist.

At modest ad spend, a good agency or a lean setup usually wins on total cost, because you rent senior expertise part-time instead of paying full-time for one generalist. As spend climbs into the higher five and six figures per month, an in-house strategist starts to pull its weight, and a hybrid model frequently beats both pure options.

So which one wins for your business

For an SME leader or a TPE founder still finding product-market fit in paid search, an agency almost always wins early. You get a full skill set immediately, no recruiting cycle, and the freedom to scale the relationship up or down. Knowing when to hire a PPC agency usually comes down to this: hire one when paid search matters to revenue but does not yet justify a senior full-time salary, or when your existing team is stretched too thin to test properly.

For a CMO with a mature, high-spend account and a clear roadmap, bringing strategy in-house can make sense, provided you can attract, load, and retain top talent. For a CTO or RH leader weighing headcount, remember that a hire is a multi-year commitment with turnover risk baked in, while an agency is a variable cost you can adjust. In the end, the Google Ads agency vs in-house question has no universal winner, the best answer is the one that matches the model to your stage.

When a senior agency beats both

The weakness of the pure agency model is the one everyone has felt: junior account managers, slow replies, dashboards instead of decisions. That is exactly the gap a senior-only partner closes. When your account is run by certified specialists rather than trainees, you get the cost efficiency of outsourcing with the accountability people assume only an in-house hire delivers. It is the reason results like this: 246 percent revenue increase on Google Ads in three months for Eric Bompard come from a lean expert team at Donutz Digital, not a bigger org chart. If you want the honest version of your own numbers, a free Google Ads audit will show you where your current setup is leaking budget before you commit to any model.

Frequently asked questions

Is a Google Ads agency cheaper than hiring in-house?

At small to mid ad budgets, usually yes. A fully loaded in-house PPC hire costs far more than the salary line once you add benefits, tools, recruiting, and turnover risk. An agency spreads senior expertise across your account for a predictable fee, which often works out lower until your spend is large enough to justify a dedicated full-time strategist.

How much does a Google Ads agency charge per month?

Google Ads management fees typically run 10 to 20 percent of monthly ad spend, or a flat retainer between 1,500 and 10,000 euros or more, depending on complexity. Watch for setup fees, creative charges, and cancellation clauses, since the headline rate rarely reflects the full Google Ads management cost.

When should I hire a PPC agency instead of building an in-house team?

Hire a PPC agency when paid search drives real revenue but does not yet justify a senior full-time salary, when you need a full skill set immediately, or when your team lacks the bandwidth to test and optimise properly. Build in-house once spend is high, stable, and strategic enough to keep a specialist fully occupied.

What hidden costs come with an in-house PPC team?

Beyond salary, expect roughly 25 to 40 percent on top for payroll taxes, benefits, and overhead, plus tools, training, recruiting fees, and the cost of turnover. Single-person coverage also creates skill gaps and continuity risk when that person is unavailable or leaves.

Is a hybrid model worth it?

For higher-spend accounts, often yes. Keeping one senior strategist in-house while outsourcing execution to an agency combines internal ownership with specialist depth, and frequently beats both pure options on total cost and reliability.