Hiring a marketing agency: what to look for and the costs

A full-time senior marketer will run you around €70,000 a year in 2026, including employer overhead, pension and tooling. An external agency starts at €1,500 per month for a light retainer. That gap often decides the choice, but price alone does not tell the whole story. Below is the trade-off without the sales pitch.

In-house versus external: when to choose what?

The rule of thumb is simple. If you have predictable, daily marketing volume (content, ads, email, social), an in-house marketer wins over time. If you have peaks, a specialism you rarely use, or no scale yet, an agency is cheaper and faster.

• In-house: maximum involvement, knows your product, but expensive and limited to one or two specialisms per person.
• Agency: a whole team of skills (SEO, ads, design, development) for the price of one junior, but less deep in your day-to-day business.
• Hybrid: an in-house marketer who directs the agency. In practice the strongest model once you start growing.

At NedDev we see many SMB clients start with an agency retainer and only hire their own marketer around €1 million in revenue. Up to that point the overhead of a permanent contract is too high relative to the output.

What does a marketing agency really cost?

Rates vary widely. A freelancer charges €60 to €110 per hour, an established agency €95 to €150. The common models:

• Retainer: a fixed monthly fee, usually €1,500 to €8,000, with an agreed pool of hours and deliverables.
• Project: a fixed price for a defined engagement, for example an SEO foundation or a campaign launch.
• Performance: partly paid on results. Sounds attractive, but only works with clear, attributable KPIs.

Watch for hidden costs: ad budget is separate from the agency fee, tooling (Semrush, Ahrefs, an email platform) sometimes comes on top, and setup fees for one-off configuration are not unusual. Always ask for a breakdown between hours, media and tooling.

What to look for before you sign

The key question is not "what does it cost" but "who owns what". Make sure you stay the owner of your Google Ads account, your Analytics, your website and your content. Too many companies end up chained because the agency manages the accounts under its own name.

• Ask for concrete, measurable KPIs and how they get reported.
• Ask for examples from your own industry, not just the prettiest cases.
• Check the notice period. A one-year contract without an exit is a red flag.
• Ask who actually works on your account. Sold by a senior, executed by an intern is more common than you think.

An agency that is honest about what does and does not work is worth more than one that promises everything. We regularly tell clients that paid ads for their niche market is a waste of money and that they are better off investing in SEO and content. That advice earns us fewer billable hours in the short term, but it builds trust that lasts for years.

The three models weighed against each other

Which collaboration model fits best depends on how much steering you want to do yourself and how predictable your marketing need is. A quick comparison:

• Retainer: ideal if you want continuous output and a grip on a fixed budget. You know what you pay each month and can plan around it.
• Project: ideal for a defined goal, for example a new website launch or an SEO foundation that pays off on its own afterward.
• Performance: attractive on paper, but only works if you can measure and attribute conversions cleanly. In a long B2B sales cycle that is rarely the case, and you end up arguing over who claimed which deal.

In practice most of our clients combine a fixed retainer for the ongoing baseline with separate projects for bigger interventions. That gives predictability without locking you into a rigid contract.

The combination with development

Marketing without a fast, technically healthy website is mopping the floor with the tap still running. A slow site or a messy technical SEO base undermines every euro you put into campaigns. That is why we always tie marketing to engineering: a Next.js site that loads in milliseconds converts measurably better than a slow WordPress install.

Look at our MemurMaaslari case, where programmatic SEO without a single paid ad delivers 50,000 visitors per month. That is the kind of marketing that keeps paying off, even after you stop spending. An ad stops converting the moment your budget runs out, while a well-ranking page keeps bringing in traffic for months and years. For most SMBs that is the difference between marketing as a cost and marketing as an asset.

That is why, with every marketing question, we look at the foundation first: how fast the site loads, whether the technical SEO is sound, whether the content is structured for both Google and AI search systems. Only once that is in place does it make sense to invest in campaigns. More about our approach at marketing and growth.

Conclusion

Hire an agency if you want speed, breadth of skills and flexibility. Hire someone in-house when you run predictable volume and need deep product knowledge. And whichever model you choose: make sure you stay the owner of your data, accounts and content. That is the one decision you cannot undo later.