Choosing a PPC agency comes down to verifying their technical competence, understanding how they charge, confirming you’ll own your own ad accounts and data, and making sure their reporting gives you enough visibility to know whether the money is working. The wrong agency can burn through thousands in ad spend with little to show for it, while the right one becomes a genuine growth lever. Here’s how to evaluate them.
Understand the Four Pricing Models
Before you compare proposals, you need to know what you’re comparing. PPC agencies typically charge in one of four ways:
- Flat monthly fee: You pay a fixed retainer each month regardless of how much you spend on ads. This is the most predictable model for budgeting, and it works well when your ad spend is high enough that a percentage-based fee would feel excessive.
- Percentage of ad spend: The agency takes a cut of your monthly ad budget, commonly 10% to 20%. This aligns their incentive with growing your campaigns, but it also means they benefit when you spend more, whether or not that extra spend is efficient.
- Performance-based: Fees are tied to specific results like leads, sales, or revenue targets. This sounds ideal but can create misaligned incentives if the agency chases volume over quality.
- Hybrid: A base retainer plus a performance bonus or percentage component. Many agencies land here because it gives them stable income while still tying part of their compensation to results.
No single model is inherently better. What matters is that you understand exactly what you’re paying, what it covers (ad spend management, landing page work, creative production, reporting), and what costs extra. Ask for a full fee breakdown before signing anything.
Check Certifications, But Look Deeper
Google’s Partner program has two tiers. A standard Google Partner must maintain at least $10,000 in ad spend over 90 days, keep an optimization score of 70% or higher, and have at least half its account strategists certified in Google Ads. A Google Premier Partner sits in the top 3% of participating agencies in its country, evaluated on client growth, client retention, product diversification beyond Search (into YouTube, Display, Shopping, Apps), and total annual ad spend.
Premier Partner status is a meaningful signal. It tells you the agency manages significant budgets, retains clients year over year, and works across multiple ad formats. But certification alone doesn’t guarantee they’re right for your business. A smaller agency without Premier status might deliver better results for a niche e-commerce brand than a large Premier Partner that mainly handles enterprise accounts. Use certifications as a filter, not a final answer.
If you’re running ads on Meta, check whether the agency has Meta Business Partner status as well. For Microsoft Ads, look for Microsoft Advertising Partner certification. The more platforms you plan to use, the more these credentials matter.
Confirm You’ll Own Your Accounts
This is non-negotiable. Your Google Ads account, Meta ad account, and Google Merchant Center should belong to you. A good agency will work inside your accounts with managed access, building up your historical data and conversion signals over time. If you part ways, everything stays with you.
Some agencies insist on creating new accounts under their own umbrella. That means if you leave, you lose all your campaign history, audience data, Quality Scores, and conversion tracking. Starting over from scratch with a new agency costs you months of learning that the algorithm already completed. If an agency tells you they need to own your accounts or wants to replace well-functioning accounts with new ones “because that’s how they work,” walk away.
Ask the Right Questions During Vetting
A capable agency should be able to answer these questions with specifics, not vague generalities:
- Walk me through how you’d set up a campaign for our business. You want to hear about keyword research, audience segmentation, ad group structure, and conversion tracking setup. Generic answers like “we’ll optimize for your goals” are a red flag.
- Which KPIs do you track, and how do you define success? The answer should connect to your business objectives. If you care about cost per acquisition, they should talk about CPA targets, not just click-through rates.
- How do you handle landing pages? Ads only work if the landing page converts. Find out whether the agency optimizes or builds landing pages, or whether that responsibility falls on you.
- How do you prioritize keywords and bidding? Listen for a structured approach: separating branded from non-branded terms, using match types strategically, and adjusting bids based on performance data rather than setting and forgetting.
- Tell me about a campaign that performed poorly and how you turned it around. This reveals their problem-solving process. You want an agency that diagnoses issues methodically, not one that just increases the budget when results dip.
Pay attention to how they ask questions about your business, too. An agency that jumps straight to tactics without understanding your margins, customer lifetime value, or sales cycle isn’t going to build campaigns that make financial sense.
Evaluate Their Use of AI and Automation
Modern PPC management relies heavily on automation for bidding, budget allocation, and creative testing. But there’s a wide gap between agencies that lean on Google’s default Smart Bidding with no oversight and those that layer their own intelligence on top.
Strong agencies use automated bidding systems that adjust every 15 to 30 minutes based on conversion probability, competitive shifts, audience behavior, and time-of-day patterns. They monitor creative fatigue by tracking click-through rate trends and engagement metrics, rotating in fresh ads before performance degrades. Some use machine learning to predict when a creative will start underperforming three to five days before it actually does, giving them time to prepare replacements.
The key distinction is human oversight. AI handles the real-time adjustments well, but strategic decisions still need a person. Campaign setup, creative development, strategic planning, and interpreting results in the context of your business goals all require human judgment. Ask how often you’ll have a strategic review. Quarterly reviews where the agency analyzes performance, discusses market changes, and adjusts optimization goals are a baseline for mid-market accounts. Larger accounts may warrant monthly strategy sessions.
If an agency describes their process as entirely hands-off (“we let the algorithm do its thing”), that’s a sign of limited sophistication. If they describe everything as manual, they’re probably behind the curve. You want the combination: automated execution with human strategy.
Review Their Reporting and Communication
Before you sign, ask to see a sample report. You’re looking for clarity, not volume. A 40-page PDF full of charts you can’t interpret is no more useful than no report at all. Good reporting connects ad performance to business outcomes: how much you spent, how many conversions you got, what each conversion cost, and how those numbers compare to the previous period and your targets.
Frequency matters too. Monthly reporting is the minimum. Biweekly or weekly performance summaries are better, especially during the first few months when the agency is learning your account. Ask whether you’ll have access to a live dashboard, and whether you’ll have a dedicated point of contact or rotate through a support queue.
Clarify how quickly they respond to urgent requests. If a campaign starts burning budget on irrelevant clicks or a landing page goes down, you need same-day action, not a ticket that gets picked up in 48 hours.
Start With a Trial Period When Possible
Many agencies require three- to six-month contracts, which is reasonable since PPC campaigns need time to gather data and optimize. But be cautious about contracts longer than six months with agencies you haven’t worked with before. If you can negotiate a 90-day trial or a contract with a 30-day cancellation clause after the initial period, you give yourself an exit if the relationship isn’t working.
During that trial, evaluate them on the metrics you agreed to upfront. Did they hit the CPA targets? Are they communicating proactively? Are they testing new ad copy and audiences, or running the same ads unchanged for weeks? The first 90 days tell you a lot about how the next year will go.
Match the Agency to Your Scale
A boutique agency with five employees may give you outstanding attention but lack the bandwidth to manage a rapid scale-up across multiple platforms. A large agency with hundreds of clients may have deep platform expertise but assign your account to a junior strategist who’s managing 20 other accounts simultaneously. Neither is inherently wrong, but the fit has to match your situation.
Ask how many accounts each strategist manages. If your point of contact handles more than 15 accounts, your campaigns probably aren’t getting daily attention. Ask about the team structure: who builds the campaigns, who optimizes them, and who you’ll actually talk to on calls. If the salesperson disappears after signing and you never hear from a senior strategist again, that’s a problem you want to identify before it happens.