Most agency selection processes focus on the wrong things. Companies evaluate portfolios, sit through polished pitch decks, and choose based on chemistry in a 60-minute meeting. Then six months later, the work is not delivering results and nobody can explain why.
The problem is not that agencies are bad. The problem is that the selection criteria are backwards. Here is what actually matters.
Start with the Problem, Not the Solution
Before talking to any agency, define what you actually need solved. Not "we need better marketing" but something specific: "We need to reduce our customer acquisition cost from EUR 180 to under EUR 100" or "We need to generate 50 qualified leads per month from organic search."
If you cannot define the problem specifically, you are not ready to hire an agency. You need strategy first, then execution.
The Questions That Actually Matter
1. Who Will Do the Work?
The people in the pitch meeting are rarely the people who will work on your account. Ask directly: "Who will be my day-to-day contact, and can I meet them before we sign?"
If the answer involves an account manager who relays your feedback to a team you never interact with, that is a red flag. Every layer between you and the work is a layer where context gets lost.
2. How Do You Measure Success?
Good agencies tie their work to business outcomes, not activity metrics. If an agency talks about impressions, reach, and engagement without connecting those to pipeline, revenue, or customer acquisition cost, they are optimising for things that do not pay your bills.
3. What Will You Not Do?
An agency that claims to do everything probably does nothing exceptionally well. The best agencies are honest about their strengths and limitations. They will tell you when something is outside their expertise and recommend a specialist.
4. Can You Show Me Results from a Similar Company?
Not just a case study PDF, but specifics. What was the starting point? What did they do? What were the measurable results? How long did it take? If they cannot answer these questions with numbers, the case study is marketing material, not evidence.
5. What Happens When Something Goes Wrong?
Every engagement hits problems. The question is how the agency handles them. Do they flag issues proactively or wait until you notice? Do they adjust strategy based on data, or stick to the original plan regardless?
Red Flags to Watch For
Long-term contracts with no performance clauses. If an agency demands a 12-month commitment with no exit provisions tied to performance, they are protecting their revenue, not your results.
Proprietary tools and platforms. Some agencies build campaigns on their own platforms, making it difficult to leave. Your data, your campaigns, and your accounts should always be yours.
Vague reporting. If monthly reports are filled with vanity metrics and lack clear connections to your business goals, you are paying for activity reports, not results.
The everything agency. Be cautious of agencies that position themselves as experts in SEO, PPC, social media, PR, web development, branding, and AI, all at the same time. Depth beats breadth.
What Good Agencies Look Like
The best agencies share common characteristics. They ask hard questions during the sales process, sometimes harder than you expected. They are transparent about what they can and cannot do. They structure engagements around outcomes, not hours. They proactively flag problems before you notice them. And they treat your budget as if it were their own money.
The First 90 Days
The real test of an agency relationship is the first 90 days. By then, you should have clarity on whether the partnership is working. Not necessarily results (some strategies take longer), but clarity: clear communication, defined metrics, a strategy you understand and believe in, and evidence that the work is moving in the right direction.
If you do not have that clarity after 90 days, it is time for a direct conversation about whether this is the right fit.
