Most digital marketing agencies are legitimate; a persistent minority are not - and even honest agencies can be a bad fit. The expensive part is that bad engagements typically take six to twelve months to unwind. These are the red flags that reliably predict trouble, sorted by when you can spot them.
Before you sign
- Guarantees. "Page one of Google in 30 days", "guaranteed 10x ROAS". No credible agency guarantees outcomes on platforms it doesn't control. This is the single most reliable red flag in the industry.
- Vague case studies. Logos without numbers, "increased brand awareness" without measurement, no client you can actually speak to. Ask directly using our pre-hiring questions; evasion is the answer.
- Secret methods. "Proprietary techniques we can't disclose" usually means tactics that violate platform policies (link schemes, engagement pods, bought followers) - and the penalties land on your accounts, not theirs.
- Pressure tactics. Expiring discounts, "we only take one client per industry, decide today". Professional services don't sell like timeshares.
- They own everything. Contracts where the agency holds your ad accounts, analytics or domains hostage on exit. You must own your accounts, data and creative - non-negotiable.
- No questions about your business. An agency that pitches solutions before asking about your customers, margins and goals is selling a template.
After the work begins
- Reporting in vanity metrics only. Impressions and likes with no path to leads and revenue - or dashboards you're not given access to.
- Activity without change. The same report every month, no tests, no reallocations, no "here's what we learned". Retainers on autopilot are the industry's quietest form of waste (the monthly questions that expose it).
- Excuses without plans. Results dip everywhere sometimes; good agencies bring diagnosis and a recovery plan, bad ones bring the algorithm-blame carousel.
- Junior swap-out. The senior team from the pitch vanishes after month one. Ask who is doing the work - again.
- Surprise costs. Media spend, "setup fees" and tool charges materialising outside the agreed scope.
Your best protection is literacy
Every red flag above is obvious to a client who understands the fundamentals - which is why informed clients get better agencies and better work from them. The Digital Marketing in Practice course at London School of Business UK exists for exactly that: making you impossible to bamboozle. Also weigh the agency vs in-house question, and contact us with any questions.