How to choose a marketing agency: the questions that reveal the most

Aug 18
3 min read

Updated: Aug 22

Introduction

Choosing an agency is difficult because the thing being sold is hard to inspect in advance. Portfolios show finished work rather than results, references are selected, and everyone describes themselves in similar language.

The way through is to ask questions whose answers are hard to fake, and to structure the first engagement so a mistake is recoverable.

1. How to choose a marketing agency: start with the diagnosis

Before comparing anyone, be clear about which problem you have — not enough customers, customers spending too little, or customers not returning.

These need different work. An agency excellent at acquisition will not fix a retention problem, and if you cannot say which you have, you will be sold whichever the agency prefers to deliver.

If you genuinely do not know, buy the diagnosis first as a small piece of work. That is a legitimate engagement in itself and it makes the next decision an informed one.

2. Ask what you keep

This is the most revealing question available, and the answers vary enormously.

Whose accounts will the work be built in — yours or theirs? What happens to the customer list, the ad account, the tracking, the creative files if you stop working together? Will there be documentation? Will anyone on your side be trained?

Vague answers here are the strongest warning sign in the entire process. An agency that has thought carefully about handover will answer precisely, because they have done it before.

3. Distrust guaranteed numbers

Nobody can guarantee a specific result in marketing, because the outcome depends on your offer, your pricing, your market and your delivery as much as on their work.

What a credible provider can commit to is process: what will be built, in what order, by when, and what will be measured. That is a promise they control.

Where a number is committed, ask what backs it. A reasoned estimate with stated assumptions is fine. A confident figure with no working behind it is a sales tactic.

4. Ask about a failure

Ask for an engagement that did not go well, and what they changed afterwards.

Everyone has them. An agency that cannot name one is either inexperienced or not being straightforward, and both are useful to know. The quality of the answer — whether they analysed it or blamed the client — tells you a great deal about how they will handle it when something goes wrong for you.

5. Find out who actually does the work

The people in the pitch are frequently not the people on the account.

Ask who will do the work day to day, how experienced they are, and how many other clients they carry. This is not unreasonable to ask and the reaction is informative in itself.

6. Check how they report

Ask to see a real report from an existing client, with the confidential parts removed.

You are looking for whether it connects activity to business outcomes — customers, cost per customer, revenue — or whether it stops at impressions, reach and engagement. Reporting that never reaches money is reporting designed to be difficult to judge.

Also ask whether you will have direct access to the underlying accounts. You should.

7. Structure the first engagement small

Whatever you decide, make the first piece of work defined, bounded and paid in stages.

A short scoped project reveals how someone communicates, how they handle disagreement, and whether the work is good — none of which is visible in a pitch. It also limits the cost of being wrong.

Expand afterwards if it went well. Treat any pressure toward a long commitment before either side has worked together as information.

Conclusion

Know which problem you have before comparing anyone, and buy a diagnosis if you do not. Then ask what you keep, distrust guaranteed outcomes, ask about a failure, find out who does the work, and inspect a real report.

Start with a small defined project rather than an open-ended arrangement. The right agency will be comfortable with all of that — and the discomfort of the wrong one is exactly the signal you are looking for.