Is Your PPC Agency Actually Worth the Money?
If you're paying a PPC agency every month but you're not entirely sure what you're getting for it, you're not alone. It's one of the most common concerns we hear from UK business owners: "How do I know if my PPC agency is doing a good job?"
The uncomfortable truth is that a lot of Google Ads management out there is mediocre at best. Some agencies set campaigns up once, switch on automated bidding, and then quietly coast while sending you a polished report each month that hides more than it reveals. Meanwhile, your cost per lead creeps up, your wasted ad spend grows, and your return on ad spend (ROAS) slowly erodes.
This guide will show you exactly how to evaluate your PPC agency's performance - the key metrics to track, the red flags to watch for, and the questions to ask. By the end, you'll know whether your Google Ads agency is genuinely driving profitable growth or just collecting a retainer.
If you want a fast, independent second opinion, you can run our free 60-second PPC audit to spot wasted spend and missed opportunities in your account within minutes.
First, Define What "A Good Job" Actually Means
Before you can judge performance, you need to be clear on what success looks like for your business. A good PPC agency should have aligned with you on this from day one. "More clicks" or "more impressions" is not a business goal - profitable growth is.
Strong, commercially focused objectives look like:
If your agency has never had this conversation with you, that's the first red flag. Without clear commercial KPIs, neither of you can honestly say whether the campaigns are working. Our pricing page explains how we tie every engagement to measurable commercial outcomes from the outset.
The Key PPC Metrics That Reveal Performance
Vanity metrics like impressions and clicks make reports look busy but tell you very little about profitability. Here are the metrics that actually matter when judging your Google Ads management.
1. Cost Per Acquisition (CPA) / Cost Per Lead (CPL)
This is the headline number for most lead-generation businesses. Your CPA tells you how much you're paying for each conversion. A good agency will be relentlessly working to reduce this without sacrificing lead quality. If your CPA has been flat or rising for months with no explanation, ask why.
2. Return On Ad Spend (ROAS)
For e-commerce and revenue-tracked businesses, ROAS is king. A ROAS of 4:1 means you earn £4 for every £1 spent. The "good" number varies by industry and margins, but the trend matters most - it should be stable or improving over time, not quietly sliding backwards.
3. Conversion Rate
If you're getting plenty of clicks but few conversions, the problem could be your landing pages, your targeting, or your offer. A competent agency monitors conversion rate closely and gives you proactive feedback on your landing pages - not just the ads.
4. Quality Score
Quality Score is Google's rating of your ad relevance, expected click-through rate, and landing page experience. Higher Quality Scores lower your cost per click and improve your ad positions. A good agency actively works to improve Quality Score; a lazy one ignores it entirely.
5. Impression Share & Lost Impression Share
This shows how often your ads appear versus how often they could. If you're losing impression share due to budget or low Ad Rank, your agency should be flagging it and advising you on the trade-offs - not hiding it.
6. Wasted Ad Spend
Perhaps the most telling metric of all. How much of your budget is being spent on irrelevant search terms? A diligent agency reviews the search terms report regularly and adds negative keywords. If you check your search terms and see spend on wildly irrelevant queries, your account is leaking money.
10 Red Flags Your PPC Agency Isn't Pulling Its Weight
Here are the warning signs we see again and again when auditing accounts that have been managed by underperforming agencies.
1. You Don't Have Admin Access to Your Own Account
This is the biggest red flag of all. You should always own your Google Ads account and have admin access. If your agency built the account under their own MCC and won't give you access, you're being held hostage. Your data, your history, and your account should be yours.
2. Reports Are All Vanity Metrics
If every report leads with impressions, clicks, and click-through rate but says nothing about CPA, ROAS, or revenue, they're distracting you from what matters. Good reporting connects ad spend to business results.
3. "Set and Forget" Management
Log into your account and check the change history. A well-managed account shows regular activity - new negative keywords, bid adjustments, ad copy tests, audience refinements. If the last meaningful change was three months ago, you're paying for management that isn't happening.
4. No Negative Keywords Being Added
Negative keywords are fundamental to controlling wasted spend. If the negative keyword list hasn't grown in months, your agency isn't reviewing search terms - and your budget is paying for it.
5. Conversion Tracking Is Broken or Missing
Shockingly common. If conversion tracking isn't set up correctly, every optimisation decision is based on bad data. We cover this in depth in our guide to Google Ads conversion tracking - broken tracking alone can waste over 20% of your budget.
6. You Never Speak to the Person Managing Your Account
Many agencies put a junior account manager between you and whoever actually touches your campaigns. If you can never get a straight technical answer or speak directly to your specialist, accountability disappears.
7. Slow or Vague Communication
Days to get a reply. Reports that arrive late. Answers full of jargon designed to confuse rather than clarify. Strong agencies communicate proactively and explain things in plain English.
8. They Blame Google for Everything
Algorithm changes and rising CPCs are real, but they're not an excuse for consistent underperformance. A good agency adapts strategy; a poor one uses "Google changed things" as a permanent get-out clause.
9. Locked Into a Long Contract With No Results
Be wary of agencies that demand 12-month lock-ins before they've proven anything. The best operators are confident enough to earn your business month after month.
10. No Clear Strategy Beyond "Spend More"
If the only recommendation you ever hear is "increase your budget," that's not strategy. Scaling should follow proven profitability, not replace it.
The Questions to Ask Your PPC Agency
Want to test your agency quickly? Ask these questions and judge the quality of the answers:
If your agency stumbles on these, it might be time for an honest review of the relationship. A quick way to benchmark them is to run an independent free PPC audit and compare the findings against what they've been telling you.
What Good PPC Management Actually Looks Like
To balance out the red flags, here's what a high-performing Google Ads agency does consistently:
This is exactly the standard we hold ourselves to. With 8+ years of experience and a deliberately small client roster, you work directly with a specialist - never a junior account manager. You can see the kind of results this approach delivers in our case studies, and learn more about our philosophy on the about page.
How to Get an Independent Second Opinion
The hardest part of judging your own PPC agency is that you often don't know what you don't know. That's where an independent audit is invaluable.
Our free 60-second PPC audit gives you a fast, no-obligation snapshot of your account's health - highlighting wasted spend, tracking issues, and quick-win opportunities. It's the simplest way to sanity-check whether your current management is up to scratch.
If you'd prefer a deeper conversation, you can book a free strategy call and we'll review your account with you directly. No hard sell, no jargon - just an honest assessment of where you stand and what's possible.
The Bottom Line
A good PPC agency should make you money, communicate clearly, and treat your account like it's their own. If you're seeing rising costs, vague reporting, set-and-forget management, or you don't even have access to your own account, those are signs something is wrong.
Use the metrics, red flags, and questions in this guide to hold your agency accountable. And if the answers leave you uneasy, get an independent view. The cost of staying with an underperforming agency isn't just the retainer - it's all the profitable growth you're missing out on every single month.
Ready to find out where you really stand? Start with our free PPC audit or get in touch for an honest review of your Google Ads performance.